need help with tuning tips for a forged ca

[the forsaken]

hi guys, I'm new at this forum.. and I've looked true your old stuff but i still can't find the right answers.

i just just got my self a new setup for my ca18det. Garrett GT2871r, FMIC, full 3 inch exhaust, SPEC stage 3 clutch kit, apexi safc, 255lph fuel pump, manual boost controller, 450cc injectors, AFPR, HKS external wast gate 40mm.

i have ran on it like this for some time. on only 8psi.but now i just got my self some forged pistons.

now my question is how high can i boost it with these pistons. regardless of the fuel sys i have now. because i wanna know how much psi boost i can di max and it still being safe,

i was planing on getting a z32 MAF, and bigger injectors and maybe also a better fuel management.

let me know what suggestions do you have for me, on how much PSI boost i can go with what i have now.. and how much can i boost if i get a better fuel system. and if you would have any idea how much WHP will I be making then.

i have confidence in your expertise and i thank you a lot for your help.

you can watch a video of my car here form when it was still stock but on 10psi

http://www.youtube.com/watch?v=JDm0FcOjIug

[themadscientist]

Forged pistons are usually lighter than cast. Bad tuning and detonation will destroy them just like cast, it will only take a few extra seconds under load. No real difference in tuning, a good tune is a good tune. Your fuel delivery, octane and quality, timing, plug gap and heat range, quality of the intercooling to reduce temps; things like that affect how much boost you can run, not the pistons. The pistons will forgive you a little bit more if any of the above are not right but will not prevent failure.

[the forsaken]

but with a good tuning how high can i boost? can i boost 20 psi or higher?

[themadscientist]

Too many variables to say for sure. Why do you want to push boost that high, what are your HP goals?This is your turbo I beleive, looks to be quite happy at that boost levelYour injectors are too small though, for the flow that turbo puts out at that boost pressure you should look into some 550s.

[chausaster]

With a good tune and excluding any variables like random detonation you can easily boost 20+ psi. You also have to account for things like your lower end under that stress. Having just forged pistons alone can save your pistons from the unexpected thing that may come up but if your rods, bearings, and such aren't meant to handle it then your weak spot will be somewhere else not your pistons. if you want to be safe go for a package of good internal mods to help you out for those unexpected moments.

[the forsaken]

i think i would be very happy is somehow i could reach 300WHP.... look the ting is i live on a very small island in the Caribbean. and we don't have mane people with this engine.. that's why i don't know much... but jes in that cace what do i have to do to be able to reach 300whp?

[bentvalves]

your on the right road.

Look into some bigger injectors, Im running sard 700 cc injectors.

you will need that z32 AFM, and you might as well look into something along the lines of an apexi power FC while your at it.

I suggested PFC because it is plug and play and has you burning tires in hours, not days.

[themadscientist]

Pantherracer is in the Bahamas I think. Not sure how close that is to Curacao.

[Cams]

Pretty far. Curacao is near Venezuela.

Project seems to be on the right track. Keep on it.

[the forsaken]

well thank you guys.. i will look into the maf sensor and the injectors and the power FC . but can i also use a q45 maf... i just got it today from a friend. if i'm not mistaken i can wire it and put it to work with the use of my S-afc, right?

[bentvalves]

You dont need 700cc injectors for 300whp either, I was just informing you of what I installed.

But if your base fuel pressure is where it should be, 550cc is pushing it with a 2871 and 20psi.

[float_6969]

You dont need 700cc injectors for 300whp either, I was just informing you of what I installed.

But if your base fuel pressure is where it should be, 550cc is pushing it with a 2871 and 20psi.

What duty cycle were you at with that turbo and those injectors? I know the 2871 flows more than the 2860, but I was only at 70% with 555cc injectors at 20 psi on the 2860.