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NA - 4A-GE/3A-LU Whether it's a street motor or a Formula Atlantic, you can find the answers here.

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Old 12-17-2007, 12:38 PM   #1 (permalink)
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new to mr N/A, i swear, this car is faster than it should be..

i just got 87 mk1 mr2 n/a w/ ONLY 72000miles on(wow)... got it from 2nd owner(who had car for about 1month, and sold it to me BC his son wants civic or integra, little kids!!!)
this thing suppose to have 120hp and 100tq max but i swear to god...
this drives like my 14sec b16-civic that had almost 190WHP(RIP stolen)
and the car was bit faster than my bros civic SI 07(198hp) untill 95mph..
i mean i like it but, just freaking curious how this mk1 is faster than it should be.. maybe first owner put some light flywheel, racing clutch and LSD..?

anyways.. i m planing to add basic mods(exhust, intake, header, spark plugs, wires, and maybe CAMs) along w/ new shocks and lightweight rims

i read from some article that if you add some MODs you are going to loose low end, and i don wnat that to happen, so which brand is good for this 4age..? i m DIYer/semi grease monkey, so as soon as i find out which mods gonna do good for my MR i m going to get to work... so pls help me..

oh and.. i know that N/a cars need higher lifting camshafts and cam gears.. which brand is good for DD/weekend worrior MR..?
how do you dyno tune this car, w/ stock ecu..? where can i get tunable ecus..? thank you so much....
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Old 12-17-2007, 06:55 PM   #2 (permalink)
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hey hows it goin? anyway i was impressed too but remember the car is really light around 2500lbs i think... anyway here are some good sites for mr2s well first gen at least

MKI MR2 Write-Up Page

Bill Sherwood's Modified 4AGE Page

happy reading!!!
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Old 12-17-2007, 08:43 PM   #3 (permalink)
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You could have a car with a swapped engine man. Your perception is greater than what Id feel even a modified 4AGE would put out.

You might have a blacktop or silvertop swap. You should post a picture of your engine bay.
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Old 12-17-2007, 09:54 PM   #4 (permalink)
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i wish it was swapped... but..
i don think it's swapped..
i m newbie on 4age stuff but i been MODing Vtecs for nearly 6 years(not those SOHC ones but real DOHCs) and i was searching last weekend, i was reading and in US, some MR2 from late 87s were equipped w/ 4agze engine bottoms, also some MR2s were manufactured in light weight form(bit more than 2000lb) and maybe 1st owner add racing clutch/ lightweight flywheel and LSD..?>?>?>?

my guess is that i m the lucky bastard w/light bodied MR2 mk1 NA w/ 4agze bottom... well who knows.. but one thing i can tell you is that if this thing weights 2500lb and has only 120fwhp it would not stand chance aganist cars i have run aganist..
07 civic SI and 2002 wrx turbo(not sti) i wasnt killing them or anything but i had faster launch, and was pulling on them cars until i hit almost 100mph..

i feel like i lucked out.. i wasnt expecting this much of performance... i m going to baby this car man...

is there any1 inthis forum located near LA CA USA..? or any SOcal meeting in near future..? i need to get w/ mr owners so i can learn how to drive this babe... you know what the coolest part is..? i only paid 1700usd for this babe..
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Old 12-17-2007, 11:58 PM   #5 (permalink)
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Quote:
Originally Posted by pissonlotus View Post
in US, some MR2 from late 87s were equipped w/ 4agze engine bottoms
Not really. There were some changes made, but the GZE got different pistons. There is nothing in the GZE engine assembly itself that would make more power in a naturally aspirated engine.

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Originally Posted by pissonlotus View Post
also some MR2s were manufactured in light weight form(bit more than 2000lb)
I don't know where you read that, but there were no "lightweight versions". Some cars got fewer options and thus weighed less, but they were base model cars, not special cars, and they would not be all that much lighter than the others.

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Originally Posted by pissonlotus View Post
and maybe 1st owner add racing clutch/ lightweight flywheel and LSD..?>?>?>?
I don't know why you suspect those things...I mean, it's possible, but pretty unlikely...

A "racing clutch" won't make the car accelerate any faster, and a stock clutch can handle the power a stock engine produces.

A stock engined AW11 does not need an LSD, or really even really benefit from it until power levels get very high. These cars have good traction to begin with. An LSD will not make an MR2 any faster in a straight line unless one tire is on dry pavement and the other is in vanilla pudding.

A light flywheel will help, but most of these cars don't have them. Most of them are not even owned by enthusiasts. If your car looks stock, I would bet large dollar figures that it does not have a single aftermarket performance part on it, let alone one that requires removal of the transmission to install.

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Originally Posted by pissonlotus View Post
my guess is that i m the lucky bastard w/light bodied MR2 mk1 NA w/ 4agze bottom... well who knows.. but one thing i can tell you is that if this thing weights 2500lb and has only 120fwhp it would not stand chance aganist cars i have run aganist..
07 civic SI and 2002 wrx turbo(not sti) i wasnt killing them or anything but i had faster launch, and was pulling on them cars until i hit almost 100mph
Mid-engine layout helps with the launch, but that sounds exceptionally unlikely...as in physically impossible, unless the other cars were out of gas, had two flat tires and were being driven by a corpse. But anyway, street racing is not clever and not admired, so if you're doing it, you might want to keep the stories to yourself. Meanwhile, let's see some pics of that engine bay and see if we can sort out what's going on with your car. Something is fishy. I hope you are being honest with us (and yourself) and not just telling stories
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Old 12-18-2007, 01:15 AM   #6 (permalink)
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btw
120 rWHP not 120 fWHP
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Old 12-18-2007, 02:16 AM   #7 (permalink)
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Quote:
Originally Posted by te51levin View Post
Not really. There were some changes made, but the GZE got different pistons. There is nothing in the GZE engine assembly itself that would make more power in a naturally aspirated engine.


I don't know where you read that, but there were no "lightweight versions". Some cars got fewer options and thus weighed less, but they were base model cars, not special cars, and they would not be all that much lighter than the others.


I don't know why you suspect those things...I mean, it's possible, but pretty unlikely...

A "racing clutch" won't make the car accelerate any faster, and a stock clutch can handle the power a stock engine produces.

A stock engined AW11 does not need an LSD, or really even really benefit from it until power levels get very high. These cars have good traction to begin with. An LSD will not make an MR2 any faster in a straight line unless one tire is on dry pavement and the other is in vanilla pudding.

A light flywheel will help, but most of these cars don't have them. Most of them are not even owned by enthusiasts. If your car looks stock, I would bet large dollar figures that it does not have a single aftermarket performance part on it, let alone one that requires removal of the transmission to install.


Mid-engine layout helps with the launch, but that sounds exceptionally unlikely...as in physically impossible, unless the other cars were out of gas, had two flat tires and were being driven by a corpse. But anyway, street racing is not clever and not admired, so if you're doing it, you might want to keep the stories to yourself. Meanwhile, let's see some pics of that engine bay and see if we can sort out what's going on with your car. Something is fishy. I hope you are being honest with us (and yourself) and not just telling stories
with respect, i m not trying to shake anything by anymeans, and i also mention that i m new to 4age and MR driver, i can asure that i have read some MR2 forum that from 87 4age was equipped with 4agze bottom, i didint know that it's not doing anything to performance, also, many web sites i went to check the curv weight of 87 NA, they were from 2000lb to 2500lb curve weight, and i read some NA models are lighter than other ones, that how i came up with my opinion, i just check it's not swapped, nor supercharged, however if the car weight 2400-500lb and had only 120hp(i thought NA model supports 116-124hp at crank in US) outcome should not be
what i get from the car. yes i know it's 120rhp, and this isnt my first rearwheel driver(it is my first MR),but i swear guys it feels like my old rx7gtu turbo 215hp w/2700lb or 185whp 2300lb civic.. that's why i was so amazed, and when i put mr aganist my lil bro SI n his wrx(100000miles) on PCH near HB in CA at 2am(i don street race but i wanted to check it BC it felt too fast for what it suppose to be...i was about 1/4 car front until i pass 90mph, maybe they had bad launch, maybe my buttdyno is broke but anyways, i m willing to learn more about the MRs...

so then what's NA mr2 87's 1/4miles..? mid 15..? it feels about there mid15tolow15s....?

anypointer drivering MR cars..? noticed, it is different from FR cars...

onething for sure this car is alottafun!!!!!
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Old 12-18-2007, 02:45 AM   #8 (permalink)
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here you go..

i really don know why i have to go outside at freaking 1130pm, try to take pic and prove to you that i got the freaking MR and i m not a freakin 16yrs old kid who freaking BS about **** i don got but i understand there are lots of kids who BSs about the cars so..
here you go

freaking pics i just took was too big to upload here so here is link to my old friendster pics check it out
Friendster - Tonnee

also link that says mr NA get 4agze block AW11 Changes

Last edited by pissonlotus; 12-18-2007 at 03:04 AM.
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Old 12-18-2007, 11:16 AM   #9 (permalink)
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u could have waited till the morning lol
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Old 12-18-2007, 01:12 PM   #10 (permalink)
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Dude, Aaron works for Toyota and hes pretty much an expert on the AW11 (MK1) car. And even if you had a 4AGZE bottom end, it means nothing to you, because its just strength in the engine, it doesnt affect the power output.

Something IS fishy with your car. Either you raced cars that had drivers that sucked, or your car has more to it than we know, and we are telling you, what you read on the internet about MR2s is wrong. And if you continue to act like you are, you will not be very well recieved on here.

Youve got reputable people telling you information. You dont know more about these things than Aaron does. If he says its like that, I say its like that. He knows his stuff on MK1 MR2s and 4AGEs for sure.
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Old 12-18-2007, 01:22 PM   #11 (permalink)
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And its CURB weight.

MK1 MR2s seem to run between 2300 and 2600 lbs. Theyre not even as light as youd think. 87 NAs seem to average 2350-2450 from what people are reporting on the other board. SC MK1s are porkier. Theyre the ones youll see up around 2600. I even saw one at 2700. My MK2 is 2750 without me in it. Thats a porky MK1.

MK3s are lighter than MK1s, and theyre around 2200-2300.
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Old 12-18-2007, 01:36 PM   #12 (permalink)
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Easy guys, let's not allow this to get confrontational. We have a new MR2 owner with questions and the goal is to find out whatever we can about his car. We have plenty of other people on this forum we can harass if that's what you're in the mood for...

pissonlotus: The stories you are telling are not in keeping with what we know about the performance of 99.44% of all naturally aspirated MkI MR2s on the world. I don't know about anybody else, but my interest in seeing your engine bay is to see whether there is anything special under the hood that makes your car faster than expected. You don't have any reason (nor obligation) to prove to us that you own the car.

But you're right, lots of kids (and some adults) do get on the internet and spout stories that just don't add up. Obviously we're going to be skeptical until we either a) understand what makes your car fast, or b) learn what made the other cars slow. If neither of those possibilities are supported, most of us will probably remain skeptical.

On my local Craigslist right now, there's a '73 Gran Torino with a 351C, asking $1100 and the owner claims "this car was running 11s in the 1/4 mile!" Riiight. For some people, making up lies is just a way of life. We may all just be extra cynical due to overexposure to habitual liars.
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Old 12-18-2007, 01:45 PM   #13 (permalink)
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no mean to start anything guys

i clearly mentioned the car/engine bay look stock..
maybe my butt dyno is broken, after riding my rental v6 accord for while... hee hee
btw mr2 weights that much..? than whatever they did in toyota, they did hella good job to cook up mk1 for sure... i love it..
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Old 12-18-2007, 03:31 PM   #14 (permalink)
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Glad youre happy with it. Your car does sound like a good one, low miles, prolly very well taken care of. Keep up with it and it will keep up with you for a good while.
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Old 12-19-2007, 04:21 AM   #15 (permalink)
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klassik

while?
i m going to work on mr and i m keeping this for good...
turn it into classic status.
it's funny BC i originally bought mr2 out of curiosity.
i m big fan of FORZA2 game(yes yes i m still big kid), and i like the way LOtus and other MR cars handles, and wanted have 2nd MR car so i can mess around.
and 1month ago my honda was stolen, so i got the insurance moeny and i was shopping for car to get, and found the MR2, test drove it and bought it at the spot... wow is all i got to say... i wish i have 4agze but i can still hang w/ N/A BC i eventually wanna do some grip/time ATK type event, on some aspect NA engines are better (no need to care about boost level, legg, etc)
anyways.. i will come up w/ bunch of questions starting next MONday so be ready you freaking MR2 lovers!!!!!
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Old 12-19-2007, 12:11 PM   #16 (permalink)
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Quote:
Originally Posted by pissonlotus View Post
i clearly mentioned the car/engine bay look stock..
maybe my butt dyno is broken, after riding my rental v6 accord for while... hee hee
btw mr2 weights that much..? than whatever they did in toyota, they did hella good job to cook up mk1 for sure... i love it..
You did mention that, but being new to Toyota and new to MR2s, it might be tough for you to discern exactly what is really stock and what is not. A swapped smallport or 20V would still look like a stock Toyota engine (in other words it wouldn't be bristling with aftermarket parts) but would be much faster than a stock bigport 16V. We wanted to see what exactly you were working with to help identify it.

These cars are a bit heavier than their size suggests. My '85 has a sunroof, A/C power windows and locks, and it weighs 2400 pounds with a full tank of gas. This figure was obtained by weighing the car at a truck scale, not extrapolated from the sticker on the door, which is terribly inaccurate and probably useless.
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Old 12-19-2007, 12:25 PM   #17 (permalink)
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I saw his picture, its definately a stock looking 4AGE from an MK1 car.
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Old 01-10-2008, 12:53 PM   #18 (permalink)
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I went from a 463 rwhp corvette to my 88 N/A and wasn't bummed out... My S/C has some nice mods and really gets up and goes, but other than off the line, the N/A isn't that much slower. The N/A will keep up with rediculous cars... an NSX on bumpy asphalt doesn't have anything for the N/A (sounds crazy, but this guy was driving the mess out of his somewhat modded NSX and couldn't shake me off his bumper... don't get me wrong, I wasn't passing it and couldn't have, but he couldn't get me off his bumper and his rear end was sliding out in the curves... I think he needed driving lessons or maybe just to grow a pair), didn't do bad in a drag run with a heavily modded FD RX-7 either... just a slow pulling away, but I don't know the dude's car and can't say for sure that it was running right for him... I'll give benefit of the doubt. But a while back I had a 30 minute police chase in my N/A with 8 officers trying to find/catch me so they've got a pretty good punch for what they are... the officers were looking at the motor longer than they searched the car. I don't care which two I drive most days, they're both super fun, sound different (like the N/A engine/HKS exhaust sound... and of course there's nothing like the S/C winding out at over 10 lbs of boost). I have no clue what either of mine weigh (S/C is a swap car sunroof), but I keep stripping stuff off every few days other than from the interior. I had a pile of brackets from the trunk laying behind the N/A car this past weekend actually . I'd guess you've got a basically stock N/A 4age 16 valve motor... but 120 would be great... think they're rated at 115 so if we're getting 100 to the wheels we're doing good. I figure mine must be with a custom intake and the HKS exhaust... and a couple of minor things. By the way, I got mine with around 108K on mine... over 120K now. If you're wanting to do a few things to it, first get rid of that airbox in the trunk and all that plastic intake deal that goes around the trunk and to the other side's air intake and make you a short conical air filter. Using an overly big filter doesn't seem to hurt... I'm running a K&N for a 5.0 Mustang so it is about twice as long as most folks I've seen... can hear that thing sucking air like it's life depends on it when I get into it too. Mine felt like a different car once I did that and exhaust and got some air flowing through that motor... they seem to just be air starved when stock! Congrats on getting a fun ride, I'm stuck on mr2's now.
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Old 01-10-2008, 10:42 PM   #19 (permalink)
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yes i agree...
oh and by the way..
i went to muff shop to get custom muff... guess what..
they said i already got muff that's bigger than stock one..
hee hee hee...

MR2 is FUNFUNFUN car....
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Old 02-11-2008, 09:32 PM   #20 (permalink)
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Everything I've read on the net puts the stock HP at the flywheel at 112. I think the Euro MK1's were around 120 and AUS around 118, so unless yours was imported from Europe or the engine is europen I doubt your putting out 120. If it is an after market exhaust you might be around there.
As for how it handles and feels yes they are supprisingly quick for their bhp and weight. I've had mine up to 120 @ about 7000rpms, but getting the NA past that gets a bit difficult. the 88 i have was put on the 1/4mile before I got it and I think they pulled a 17flat, of course I have her running a bit better now...actualy at this very moment shes not running...I think my altenator crapped out today and is shorting out my whole electrical system some how. With any luck i'll have a completly rebuilt 4age thats been bored out by the end of the week. Any ways glad you like your new ride. Put her on a dyno and see how she does.
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