Few Engine questions

Powell · 10-02-2008, 01:34 AM

Ok well i'm new to the mr2 world here. To start i'd like to say i am really happy with how easy it is to gain access to the engine bay. i guess you could call me the unofficial mechanic for my friends mr2. So few questions i had... this 91 mr2 that came with all the things needed to run a Stand alone tec 2. The turbo had bad bearings (stock one was put back in by previous owner when sold) so that will be shipped out and rebuilt.

#1- I'm not sure what size injectors it has. They are solid black and i guess them to be Siemens DEKA 87lbs (850ish cc) I think it was the previous owner who mentioned he thought they were 550cc but thing i was researching that didn't make much sense was that the guy also claimed the car was running 10 seconds when he had a bigger turbo on it. I've been trying to figure about about how much power the car would have to be making and well i figured like 550ish range? maybe less i'm not sure but all n all it seemed like the 550cc weren't big enough to power a 10 sec car and i haven't been able to match the injector to anything that small. So far just the 850's. I could get the number on them again a bit later

#2- the o2 sensor is gone and well i aslo figured since the car has a electromotive stand alone tec 2 computer that the previous owner kept the wideband he prob had... so question is what type of wideband works with that computer on the mr2 and any basic refrence on how it connects. if i have to splice/direct plug in/ whichever.....

#3 Do these cars have MAP sensors? I saw someone post that it may have an AFM? i'm not too familiar with the AFM so if i could get a comparision with that to an MAP.

Guess lastly is if anyone here also uses the tec 2 stand alone, what software do you use? i got the wintec2 for now but can't really do much with that until the rest of the car is done. It also needs a TPS. (dunno why all the sensors are gone from this thing)

Oh There was one other thing, The turbo setup didn't have the coolant line running to it. Apparently my friend was told it wasn't needed so the previous owner never put it on?? I could be wrong but i'm pretty sure thats there for a reason. Especially if he (previous owner) was claiming it to be a 10 sec car when he had it.

MR2 Drifter · 10-02-2008, 03:27 AM

WOW, you have to do A LOT of work to a MR2 to make it a 10 second car, take some pics of the engine bay (even with a camera phone) and we'll be able to determine if he's telling the truth or not

Powell · 10-02-2008, 10:55 AM

Once i find batteries... So the things i know that were changed, k first the engine was apparently rebuilt with all internals needed to run high boost (no way to verify yet), it has an AFPR, External Wastegate, greddy BOV, supposedly 2 fuel pumps?? was the guy to lazy to take out the old one? maybe ran the new one inline?, Gt35r (soon to be rebuilt)...also not sure if it's actually the dual ball bearing version.. Don't think it matters terribly (could be wrong), either 550cc or 850cc injectors, looks like new fuel rail, intercooler remounted on top of engine (neither me or my buddy really like it there), ofcourse your cone intake, Buddy says the wiring for most of the guages are there but guages are gone.. Mainifolds are both stock. I may port the exhaust ports on manifold, Depends if he just gets a new one instead. Not sure if i'm missing anything...I'll try and get some good pictures today or tomorrow.

Oh and has the stand alone too.

metheores · 10-02-2008, 03:50 PM

Is there any other mods done to the car? because a bigger turbo alone doesn't make it a 10 second car. I think the Previous Owner is full of ****

EDIT: just read your post, but still that setup doesn't seem like a 10 second car.

Powell · 10-02-2008, 10:02 PM

Yah i wasn't really thinking it was. should easily be in the low 12's though. On the other hand not really sure what else could be done other than a bigger intercooler and putting back all the sensors... ok well new intake and exhaust manifolds, assuming the head work is maxed, and block is beefed up.. So maybe it could potentionaly reach a 10 mark? i'm not familiar enough what people usually do to thier cars to get that time aside from stripping the nuts off.

Sang · 10-04-2008, 10:29 PM

Not all turbos use a wet CHRA...therefore not all turbo setups will utilize the coolant lines to the turbo. Mine doesn't. However...a GT35 should have the coolant lines to it since I haven't seen a GT kit that didn't have any.

If it ISN'T the DBB turbo, then it's really a SC61 and he's just calling a GT35 to make it sound cooler. The SC61 is basically the non-DBB version of the 35R by precision.

550cc/min injectors is not enough to get into the 10's. They are reliable to make ~330whp on pump gas and 350-370 on pump+meth or e85.

1 pump is enough to get into the 10's. There's a couple out there running in the low 500's with e85 using 1 pump (maxed out however). You need to be mid 400's or so to start dipping into the 10's cutting some solid 60's.

If the IC is an A2W, top mount is perfectly fine, and the most preferred mounting spot for most so they don't have to cut into the firewall to mount it in the trunk.

Powell · 10-06-2008, 02:09 AM

I Finally got some pictures. The engine got a little wet from washing it before he took them.. I was able to confirm the injectors are 850cc. makes more sense, yah i knew if they were 550cc they wouldn't be enough for 10's.

Well to me it seems it's possible to reach 400hp with this setup. the 850s i haven't put in yet.

Powell · 10-06-2008, 02:10 AM

I don't like that 90 deg. elbow there either... oh don't think i ever mentioned but the internals are supposed to be all built up. I have no idea with what though.. There was a guage on the AFPR but i guess it broke somehow while it was driven. Some part of the engine kicked back and hit it from what i'm told.

Car obviously was running extremely rich. The pic with the manifold is also how the exhaust pipes look.

metheores · 10-06-2008, 02:22 AM

It looks like you got some funky tetris color pattern going on

skeptic · 10-06-2008, 04:44 PM

In my book no timeslips = no 10 sec passes. However, it sounds like it MAY have been a 10 sec car or at least pretty damn quick, but the previous owner stripped off the easy to get goodies and left you a project. Or he was trying to build a 10 sec car, didn't get it running right, and decided to dump off his project. If it were me I'd go back to 550 injectors, either rebuild and use the stock turbo or go with something like a T3/T4 (what I'm running) with proper cooling lines, get a wideband o2 sensor/gauge, TPS, and anything else missing, and after you get it running find a good tuner to get the EMS properly dyno-tuned.

Not saying it was a bad buy, you may have an engine bay full of goodies, but I don't think you are getting the full story.

Powell · 10-06-2008, 11:52 PM

Well either way, i'm willing to work with whats there and see where it goes. Why would i want him downgrading to a t3/t4 when he already has a gt53 and everything else needed to run it? Why would you downgrade? Either way he needs those few sensors and not like he's driving it now anyways. Downgrading won't change anything. He plans on having it professionally tuned but i was going to see what i could do with it in the meantime.

skeptic · 10-07-2008, 11:47 AM

Quote:

Originally Posted by Powell

Well either way, i'm willing to work with whats there and see where it goes. Why would i want him downgrading to a t3/t4 when he already has a gt53 and everything else needed to run it?

I read your post to mean it had the stock turbo with bad bearings because the previous owner kept the aftermarket one, that's what I was going off. I didn't really look at the pics, but after you said he had a GT35 I went back to see where you mentioned it. There it is in the pic.

Quote:

Why would you downgrade? Either way he needs those few sensors and not like he's driving it now anyways. Downgrading won't change anything. He plans on having it professionally tuned but i was going to see what i could do with it in the meantime.

I wasn't suggesting a downgrade of anything other than injector size, based on running the stock turbo and just getting it going. In fact, I was suggesting an upgrade from stock to a T3/T4 or similar then throwing in stock injectors until you get the car running right. Basically, the car doesn't run so minimize the unknowns until it's going, then work on the upgrades with a tuner.

Powell · 10-07-2008, 08:37 PM

Ah.. Yah.. Good idea to read post

Powell · 10-07-2008, 08:47 PM

Hey skeptic, out of curiosity, how you like that t3/t4? That seems to be the most common for most applications. I was considering buying one of those for my car. I have an old s60 lying around for now.

10-02-2008, 01:34 AM	#1 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Few Engine questions Ok well i'm new to the mr2 world here. To start i'd like to say i am really happy with how easy it is to gain access to the engine bay. i guess you could call me the unofficial mechanic for my friends mr2. So few questions i had... this 91 mr2 that came with all the things needed to run a Stand alone tec 2. The turbo had bad bearings (stock one was put back in by previous owner when sold) so that will be shipped out and rebuilt. #1- I'm not sure what size injectors it has. They are solid black and i guess them to be Siemens DEKA 87lbs (850ish cc) I think it was the previous owner who mentioned he thought they were 550cc but thing i was researching that didn't make much sense was that the guy also claimed the car was running 10 seconds when he had a bigger turbo on it. I've been trying to figure about about how much power the car would have to be making and well i figured like 550ish range? maybe less i'm not sure but all n all it seemed like the 550cc weren't big enough to power a 10 sec car and i haven't been able to match the injector to anything that small. So far just the 850's. I could get the number on them again a bit later #2- the o2 sensor is gone and well i aslo figured since the car has a electromotive stand alone tec 2 computer that the previous owner kept the wideband he prob had... so question is what type of wideband works with that computer on the mr2 and any basic refrence on how it connects. if i have to splice/direct plug in/ whichever..... #3 Do these cars have MAP sensors? I saw someone post that it may have an AFM? i'm not too familiar with the AFM so if i could get a comparision with that to an MAP. Guess lastly is if anyone here also uses the tec 2 stand alone, what software do you use? i got the wintec2 for now but can't really do much with that until the rest of the car is done. It also needs a TPS. (dunno why all the sensors are gone from this thing) Oh There was one other thing, The turbo setup didn't have the coolant line running to it. Apparently my friend was told it wasn't needed so the previous owner never put it on?? I could be wrong but i'm pretty sure thats there for a reason. Especially if he (previous owner) was claiming it to be a 10 sec car when he had it. Last edited by Powell; 10-02-2008 at 01:46 AM.

10-06-2008, 02:10 AM	#8 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	I don't like that 90 deg. elbow there either... oh don't think i ever mentioned but the internals are supposed to be all built up. I have no idea with what though.. There was a guage on the AFPR but i guess it broke somehow while it was driven. Some part of the engine kicked back and hit it from what i'm told. Car obviously was running extremely rich. The pic with the manifold is also how the exhaust pipes look. Last edited by Powell; 10-06-2008 at 02:15 AM.

10-06-2008, 11:52 PM	#11 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Well either way, i'm willing to work with whats there and see where it goes. Why would i want him downgrading to a t3/t4 when he already has a gt53 and everything else needed to run it? Why would you downgrade? Either way he needs those few sensors and not like he's driving it now anyways. Downgrading won't change anything. He plans on having it professionally tuned but i was going to see what i could do with it in the meantime. Last edited by Powell; 10-07-2008 at 12:01 AM.

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10-02-2008, 03:27 AM	#2 (permalink)
MR2 Drifter No Drifting Skills Join Date: Jun 2008 Location: Chicago Posts: 956 Thanks: 3 Thanked 16 Times in 16 Posts iTrader Rating: (2/100% )	WOW, you have to do A LOT of work to a MR2 to make it a 10 second car, take some pics of the engine bay (even with a camera phone) and we'll be able to determine if he's telling the truth or not

10-02-2008, 10:55 AM	#3 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Once i find batteries... So the things i know that were changed, k first the engine was apparently rebuilt with all internals needed to run high boost (no way to verify yet), it has an AFPR, External Wastegate, greddy BOV, supposedly 2 fuel pumps?? was the guy to lazy to take out the old one? maybe ran the new one inline?, Gt35r (soon to be rebuilt)...also not sure if it's actually the dual ball bearing version.. Don't think it matters terribly (could be wrong), either 550cc or 850cc injectors, looks like new fuel rail, intercooler remounted on top of engine (neither me or my buddy really like it there), ofcourse your cone intake, Buddy says the wiring for most of the guages are there but guages are gone.. Mainifolds are both stock. I may port the exhaust ports on manifold, Depends if he just gets a new one instead. Not sure if i'm missing anything...I'll try and get some good pictures today or tomorrow. Oh and has the stand alone too.

10-02-2008, 03:50 PM	#4 (permalink)
metheores Supreme! Join Date: Feb 2008 Location: Boston, MA Posts: 683 Thanks: 38 Thanked 16 Times in 16 Posts iTrader Rating: (1/100% )	Is there any other mods done to the car? because a bigger turbo alone doesn't make it a 10 second car. I think the Previous Owner is full of **** EDIT: just read your post, but still that setup doesn't seem like a 10 second car.

10-02-2008, 10:02 PM	#5 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Yah i wasn't really thinking it was. should easily be in the low 12's though. On the other hand not really sure what else could be done other than a bigger intercooler and putting back all the sensors... ok well new intake and exhaust manifolds, assuming the head work is maxed, and block is beefed up.. So maybe it could potentionaly reach a 10 mark? i'm not familiar enough what people usually do to thier cars to get that time aside from stripping the nuts off.

10-04-2008, 10:29 PM	#6 (permalink)
Sang Go Magic! Join Date: Jul 2006 Location: Home: Tampa, FL School: Gainesville, FL Posts: 3,384 Thanks: 19 Thanked 220 Times in 200 Posts iTrader Rating: (5/100% )	Not all turbos use a wet CHRA...therefore not all turbo setups will utilize the coolant lines to the turbo. Mine doesn't. However...a GT35 should have the coolant lines to it since I haven't seen a GT kit that didn't have any. If it ISN'T the DBB turbo, then it's really a SC61 and he's just calling a GT35 to make it sound cooler. The SC61 is basically the non-DBB version of the 35R by precision. 550cc/min injectors is not enough to get into the 10's. They are reliable to make ~330whp on pump gas and 350-370 on pump+meth or e85. 1 pump is enough to get into the 10's. There's a couple out there running in the low 500's with e85 using 1 pump (maxed out however). You need to be mid 400's or so to start dipping into the 10's cutting some solid 60's. If the IC is an A2W, top mount is perfectly fine, and the most preferred mounting spot for most so they don't have to cut into the firewall to mount it in the trunk.

10-06-2008, 02:09 AM	#7 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	I Finally got some pictures. The engine got a little wet from washing it before he took them.. I was able to confirm the injectors are 850cc. makes more sense, yah i knew if they were 550cc they wouldn't be enough for 10's. Well to me it seems it's possible to reach 400hp with this setup. the 850s i haven't put in yet.

10-06-2008, 02:22 AM	#9 (permalink)
metheores Supreme! Join Date: Feb 2008 Location: Boston, MA Posts: 683 Thanks: 38 Thanked 16 Times in 16 Posts iTrader Rating: (1/100% )	It looks like you got some funky tetris color pattern going on

10-06-2008, 04:44 PM	#10 (permalink)
skeptic No Skills Join Date: Aug 2006 Posts: 56 Thanks: 0 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	In my book no timeslips = no 10 sec passes. However, it sounds like it MAY have been a 10 sec car or at least pretty damn quick, but the previous owner stripped off the easy to get goodies and left you a project. Or he was trying to build a 10 sec car, didn't get it running right, and decided to dump off his project. If it were me I'd go back to 550 injectors, either rebuild and use the stock turbo or go with something like a T3/T4 (what I'm running) with proper cooling lines, get a wideband o2 sensor/gauge, TPS, and anything else missing, and after you get it running find a good tuner to get the EMS properly dyno-tuned. Not saying it was a bad buy, you may have an engine bay full of goodies, but I don't think you are getting the full story.

10-07-2008, 08:37 PM	#13 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Ah.. Yah.. Good idea to read post

10-07-2008, 08:47 PM	#14 (permalink)
Powell No Skills Join Date: Oct 2008 Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Hey skeptic, out of curiosity, how you like that t3/t4? That seems to be the most common for most applications. I was considering buying one of those for my car. I have an old s60 lying around for now.