Thread: Thoughts on potential ve+t setup

Throwing this out there as possibly the next step in my motors modification.

gtir manifold
gtir turbo
370cc injectors (maybe need to go to s15 440's?)
decent size fmic

the nistune ECU should be able to provide a very good quality tune to safeguard against detonation.
I only want to run wastegate pressure (sub 10psi), with my current 8500rpm rev limit.

Currently the motor has n1 cams, i have cam gears.
should I move back to the std sr20ve cams due to less overlap?

what power level would be expected with this level of modification.
Not wanting to go bigger turbo than a simple gtir turbo due to cost, and low boost level.

other thoughts?

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I'm thinking a similar setup to dude, i was think 2871 in a .86 it might be able to hold some top end flow for the n1 cams. gtir will be good just the BB on the 71 should help spool. run it between 8 and 10psi. be nice to pistons and rods

on 10psi we should be able to get around 180wkw which is what most des in aust make on 15psi

im gonna be doing the same setup on mine excpet i will have a lightly ported and polished head with 1mm bigger intake and exhaust valves, port matched intake manifold and i will be using the gtir mani and turbo w 520cc injectors @ 4 bar with probably a calum realtime ecu, i have a calum basic but im thinking to just go with a realtime so i can dyno tune it to be very very reliable. i will only push 10psi on it at most and hope to make around close to 300whp, i will be only reving to 8000 rpms as i have stock cams.

It should make very good power and have a hell of a powerband as well.

have seen posts about N1's having too much overlap for a boosted application, is this a valid point?

All VE cams have too much overlap for boosted applications (all except the VET cams obviously). At some point I remember someone posting a cam combination that would be great, but it involved not switching the exhaust cam I think (which the VET does anyway I think). I wish I could find that little gem of information.

meh high flowing turbo fixes all overlap issues, people use 16ve cams without issues, i wouldnt worry about cams until it you do it, its still quite uncharted teritory for most. I think the 20v cams will be good for a boosted setup mainly cause they have a much bigger low lobe and less duration then n1 on high lobe. But since ive already got n1's i will be trying them first for sure.

makes me worry about pistons now
rather not have to rebuild the motor, will have enough issues with gearboxes!

Yeah the ve pistons and rods are light:P hence the stay under 10psi thing, tune for 8psi on electronic boost controller to limit spikes and you should be winning, yeah probably need a 70a box in the short future id imagine.

Exhaust reversion is not the only problem with high overlap. Even if you've got no exhaust back pressure, the entire time the cams are both open you'll be blowing boost out the exhaust instead of pressurizing the cylinder. There is no real answer to overlap on a turbo car, it's bad no matter what.