3SGTE/Turbo: wanting to turbo help?

[88*mr2]

i have finally made up my mind and i want to turbo my 88 n/a redtop

i have found a few things i need already...

T25 turbo exaust manifold and probly 2.5'' exaust system

custom cold air intake

bigger injectors size reccomendations??

wat lph rating fuel pump should i use??

custom mount intercooler

wat about ecu?? i know nothing about them and havent done much reading on them yet so any help on a ecu would be appreciated

thanks guys

[Capt.Evergreen]

S/C ECU and S/C bottom end... probly a walbro fuel pump

Capt. EverGreen

[LokiRx7]

If you run fairly modest amounts of boost you can use a rising rate FPR and 4A-GZE injectors on the stock ECU and stock bottom end.

[328FTW]

Originally Posted by LokiRx7

If you run fairly modest amounts of boost you can use a rising rate FPR and 4A-GZE injectors on the stock ECU and stock bottom end.

And an ignition retarder, like an MSD ignition retarding module so you don't blow the ringlands out.

[LokiRx7]

Originally Posted by 328FTW

And an ignition retarder, like an MSD ignition retarding module so you don't blow the ringlands out.

Good call, totally forgot about that one lol.

[sckidpad]

You would need a set of these. 440cc 7mgte injectors from my 4agte

[toyotaspeed90]

FYI 440's are pretty easy to come by....

[mr2tim]

Question for the group--(from a non-turbohead)

Why go to 440cc injectors? 400% more than Toyota engineers use in the supercharged engines? If the 8psi is OEM standard for the S/C engine and you want to go as far as 16psi would 200cc injectors be more than adequate?

Also, I have been lead to understand that only a certain amount of fuel will burn with a given amount of oxygen in a combustion chamber (1:17) and the rest of the gasoline won't burn but will act like water to cool the piston.

Isn't 440cc way overkill?


(standard N/A injectors are 33cc, Toyota ups this to 100cc injectors for the supercharged engine.)

[Papo J]

The SC injectors are 365cc not 135, the NA ones are 180 something cc not 33. I don't know where you got those numbers but those are not correct. A turbo can and will flow a larger volume of air at the same pressure as an SC, that's why you need larger injectors. The air to fuel ratio is a meassure of efficiency for the most part, on a FI engine you need more fuel to prevent pre ignition caused by the heatting of the mixture due to the compression by the SC or turbo.

[donnyavery]

Originally Posted by 88*mr2

i have finally made up my mind and i want to turbo my 88 n/a redtop

i have found a few things i need already...

T25 turbo exaust manifold and probly 2.5'' exaust system

custom cold air intake

bigger injectors size reccomendations??

wat lph rating fuel pump should i use??

custom mount intercooler

wat about ecu?? i know nothing about them and havent done much reading on them yet so any help on a ecu would be appreciated

thanks guys

i did this swap about a year ago and now building anther http://www.mr2.com/forums/forced-ind...get-build.html this build is a stock red top crank rods and pistons in a 4agze block with 4agze ecu and custom wiring and a large port head its going to be run on 10 psi and two stages of 50 shot wet nitrous (i used to run it on one stage on 75 and had no problems) with all the same info below

1 for injectors use the stock sc (365cc) thats all im using with a stock fuel pump and under 13psi a/f still 10.1 before i pulled out some fuel

2 intercooler im not shour about as i dont use one im chemical intercooling with methanol so if your going ic i would think about a sc top mount(not very efficient but it fits)

3 ecu go with a stock 4agze or stand alone if you use the 4agze ecu you need all the sensors that go with it

you can safely boost 10 psi on 9.4 stock compression with a good tune ( i just use a afc neo and aem wideband seems to work grate) any more and you have to drop to like 8.0 (if you looking i got a set of 8.0-1 for 75$+shipping or 110$ shipped any where) fs 4agze pistons

[donnyavery]

Originally Posted by donnyavery

1 for injectors use the stock sc (365cc) thats all im using with a stock fuel pump and under 13psi a/f still 10.1 before i pulled out some fuel

sorry at 13 psi not under you know what i mean

[Celesabc]

bump

[Capt.Evergreen]

so small port is 9.4:1 comp???

[scottohno]

nope. big port head makes it 9.4:1.