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Discussion Starter · #1 ·
I'm planning on building a custom kit using t3/t4 for my ITR. OK, heres the deal, I plan to run 10psi initially, intercooled, controlled by Apexi Power FC standalone ECU with stock internals. This will be my first turbo install which I'm planning to do myself. My questions are:
1) What is the size of the stock injectors and will they be maxed out @ 10psi?
2) Is it advisable to run higher output injectors like 750cc on only 10psi. As I plan to fully build the block and run a much higher boost later, I will soon need bigger ones.
2) Is the stock fuel pump sufficient for 10psi? If not, which type is the best one to get?
3) Is anyone running or does anyone know if I can use the pre-pregrammed maps built into the Power FC initially after fitting the turbo; at least to drive the car to the garage to be tuned.
4) Does the size of the intercooler effect performance (ie., would a BIG intercooler produce more lag?)?, for instance, using one from GTR R34, if I can get it to fit.
5) Is it easy to remove the stock oil pan from the car (I presume its the only way to make a hole and do the welding for the turbo oil return line..)?
6) What hp roughly should I expect @ 10psi?

Any advice on bits to get, install and tech tips will be greatly received.
 

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hey swlabhot

Sorry I am not knowlidgble to answer all your questions but I can get a few for you.

1) I do not know the size of the itr injecotrs but it would be very close to the limit of their potential at 10psi. You could easily do it though. But I wouldent. Not risking the detonation of that picey C5 motor

2) I would go with the 450's at first. These will be fine for 10-14 pounds. For the 750's that is big! (to start out with) You would have to tune them to run at less than 1/2 duty cycl. As long as that Apex unit can controll injector pulse at all RPM's then maybe... But yet i have never worked nor seen this apex standalon unit before. So I would start with 450's and these will be plenty up to about 14pounds or more and ten advance to larger injectors a you advnce wih your block rebuild

3) Definatly Not! If you plan on running more boost down the roadpurchase a good in-tan fuel pump. The walboro 255 high pressure pump... will be more than enough for your setup. I a going to upgrade to an intake pump as well, currently i just have the in-line made by "Airtex" Walboro is the best.

4) Yes! The bigger the intercooler the more lag. But yes the theory is the bigger the intercooler the colder the air, but that is not always the case. My spearco intercooler that came with my DRAG kit is very affecient, does the job, so dont spend excess $$ on a big ass intercooler- cause all you would get with that is looks not performace.

5) Yes it is very easy

6) Expect on a C5 about 280 to the wheels at 10 psi (just an estimate). But let me warn you 10 psi is alot on those high compression motors if not properly tuned!!!

Hope I helped,
Ken
 

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sorry to tell you this, but im totally ANTI turbo b18c5... that motor is for NA... im begging you, please dont turbo it... please?
 

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Discussion Starter · #4 ·
Ken,

Thanks man, appreciate your feedback.

SoFlaGS-T,

I know what you mean and have thought about it seriously. I felt the same way too but to get that sort of power by going the N/A route is going to make me homeless...:D and I cannot afford to get another block to turbo it with, if I had extra $$$, I would get a B18C1 or B16A and turbo that instead.

Anymore out there ??? Pls keep em coming!!
 
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