Power Primer question.

[Zero turbo]

Do you have to buy a pigy back ecu to tune the fuel or can you adjust the fuel with the fuel regulator manually? i am looking to buy a greddy E-manage ultimate or a Apexi-S-afc-2-Air-Fuel-Controller to tune the fuel for the power primer 275rwhp power mark. thx

[Zero turbo]

my car is a 92 turbo.

[tHa kNiGHt FaLL]

Originally Posted by Zero turbo

my car is a 92 turbo.

you can buy an adjustable fuel pressure regulator and make adjustments... whicvh is cheapest.

or you can buy a fuel management system and get all into mapping and fuel time and quantity adjustments.

depends on what your trying to do...

[MR2Jedi]

Gotta be carefull when trying to lean out the fuel...are you gonna do it yourself?

[Zero turbo]

no its not me its a tuner but i am going to do a full turbo kit upgrade with a t3/t4. But how much psi can i push with a t3/t4 turbine .50 trim before i get the full fuel upgrade i whant to put the turbo and run it in a SAFE boost. I was thinking of like 8 psi of course i will get a IC before putting the turbo...

[MR2Jedi]

I would not even run the turbo without additional fuel 1st..

[Zero turbo]

even if i enable FC?? MR2 bad what are your mods and how much HP u have??THX

[Zero turbo]

if i go for a complete Cam upgrade tuned with a complete stand alone will i need fuel uprades too?? or will my turine wont help or even my engine(its stock)

[MR2Jedi]

Cams won't need a fuel upgrade. They give a higher lift and/or longer durationto the valves. Allowing more fuel and air from your stock set up to get in the cylinders. But of course, the more fuel and air=more HP..Right now my 2 is sitting with a blown headgasket. I had to order the tool to remove the headbolts. I couldn't find one here, so I ordered one(3 weeks ago) from the east coast. It won't even ship out till monday, the 26th!..
you can click on "my two 2's " and check out my cardomain webpage. I do have a modified CT26...different compressor wheel...I have never dyno'ed the car.. so I have no idea.. it's just a kick to drive...at least it was...But I'll be up and running again shortly...

[tHa kNiGHt FaLL]

Originally Posted by Zero turbo

no its not me its a tuner but i am going to do a full turbo kit upgrade with a t3/t4. But how much psi can i push with a t3/t4 turbine .50 trim before i get the full fuel upgrade i whant to put the turbo and run it in a SAFE boost. I was thinking of like 8 psi of course i will get a IC before putting the turbo...

theres a formula to finding out what turbo is best for your engine...

It goes like this:

2.0 Liters = 122 CID (cubic inch displacement)

Your P/R (Pressure Ratio) for a desired 8psi is 1.54

Now you need to find out the engine's CFM (Air Flow Rate)

The formula is : CFM = CID x Redline (Max Power) x VE (Volumetric Efficiency) x P/R

Divide By 3456 and you get CFM

So for a 2.0L 3SGTE Turbo Motor

122 x 6000 x .9 (90% VE) x 1.54 = 1014552

Divided By 3456 = 293.5625 Rounded up is 294 CFM

Now you need to find out CFM per minute for MAX and LOW RPM.
(CFM Divided By 14.7 = LBS/Per Min)


So 6000 Rpm = 20 lbs/per min
3000 Rpm = 10 lbs per min

CLICK ON PICTURE FOR CLOSE UP


This is your car... mapped out on the T3/T4 Hybrid w/ .50 Trim

As you can see the pressure ratio is low... So w/ this turbo your gonna need to boost more than 8 psi for it this turbo to make any real power.

To get a 2.0 P/R you need to boost 16psi... for this turbo to function properly on your car.

3SGTE has a static compression ration of 8.8:1 so w/ 8psi you'll have an effective compression ratio of 13.5:1
w/ 16psi you'll have an effective compression ratio of 18.3:1

These numbers are actual to your car... so i'd go w/ fuel management system and give these numbers to your tuner. and he'll be able to tune safely

[Zero turbo]

^^ thx a lot man i really thank you for taking your time into doing that calculation. I have one last question. I have been asking for a CT-20b and no racing shop knows what i am talking about. What supra year had the CT-20 one auto part had 1 , (95 twin turbo supra turbine could that be a ct20) or is it the 91 single turbo supra that has a CT-26 and over in the internet they call it a CT-20b???


MR2 Bad you have a really clean engine bay man looks sick!!

[tHa kNiGHt FaLL]

i'm not sure...

but i have a the formulas to calculate your fuel needs... w/ the t/3... its in my garage i'll get them tomorrow and post them.

[Zz_005_zZ]

Man that engine bay looks tight!!!!! too bad the all the lower stuff is still old looking, I would think the entire engine bay was new!!! How in gods name did u get it that clean?? did u rip everything out, and high polish with a dremel?? cause it all looks like high polighed aluminum??

[JekylandHyde]

All you can do with an adjustable fuel pressure regulator is adjust the fuel pressure at idle,
which will affect FP during boost as most regulators that are suggested for the MR2 are 1:1.

Meaning that for each 1 psi of boost added, the FP adds 1 psi of FP.

That being said, if you are looking for more power and want to add fuel to make that power and you only have an AFPR to play with, you are going to be running stinking rich at idle and cruise. I emphasize "stinking" because you are going to be smelling fuel and your fuel mileg is going to stink.

Most commonly available T3/T4 kits for the MR2 can be safely run up to 14 psi without any fuel mods at all.

[MR2Jedi]

Originally Posted by Zz_005_zZ

Man that engine bay looks tight!!!!! too bad the all the lower stuff is still old looking, I would think the entire engine bay was new!!! How in gods name did u get it that clean?? did u rip everything out, and high polish with a dremel?? cause it all looks like high polighed aluminum??

I took everything apart, cleaned with a Dremmel with a wire brush and painted with high temp paint. At the time I took that pic, I wasn't finished. Now that I've got everything apart waiting on a part, I will do some more...