Thread: Think I went with too big of a turbo...

Just for reference I picked up 40whp on my sr20de-t just from switching from log to tubular even without tuning
I think you can get away with some more timing at least after the peak boost rpms

How much oil is in the right solenoid? if its enough to touch the metal posts then it will cause the VVL not to engage on that solenoid.

You are wrong! a turbo is never going to be too big for a VVL!

Seriously, at 10psi with that turbo, you should be flying as soon as you hit full boost. ITs got to be the timing, or the VVL exhaust not kicking in... Or a very restrictive exhaust, VVLs need to breathe a lot, do a test run with open downpipe.

vvls revving to a billion... gigggity gigggity

Yup Log's are hogs. The biggest issue I have is finding a tubular manifold to fit into the space and still have AC. That's the main reason I just stuck to the log, at least until I got the car running. Now that it's running I need it OUT.



I was thinking the same, thus I cleaned the oil out, then took it for a test drive today, same slowness. The car is a little faster due to 3500 rpm VVL switch, since it builds boost quicker now.



I have a 3" downpipe, 3" leadpipe, 3" cat, 3" mid pipe, to a 3" custom STI muffler. Maybe I needed to go 4"?


I should mention that there is a little bog on cold starts and free reving the engine. But I think that might be a TunerCode setting preventing overrevving on cold start.

As soon as I put a cat on my car any size, it starts to have traction in 2nd gear! :O

It's a high flow cat, I wonder if it got clogged with the car being rich when I first started tuning it.

Also I did run open down pipe, but since I couldn't attach a wideband on it, my tune was too lean/rich so with open DP didn't feel all that fast either.

Timing man, timing. I would check to make sure the cat isnt melted either. I had issues n/a back in 02-03 with melting catco high flow cats. Went through 3 of them before saying screw it and gutting the thing. haha. Your car should be blistering fast man

i has 3.5 inch

Mind you I have a fatty P11, 400lbs heavier then late models B14's. I will check the cat, I'm really starting to think it's that. Also log manifold doesn't flow as well so exhaust gasses stay in the cylinder, thus heat stays, thus more prone to knocking. Which would explain why I can't run too much timing.

Lastly it's been freaking hot, heat soak is nasty. I'm going to start wrapping the exhaust and intake piping.

I want a tubular, but I don't want to spend $1k on a manifold to loose AC, not fit any fans, and still have a lagy turbo. I'm getting to the point of just going back to a T28 and using my GTi-R external gated manifold.



Size doesn't matter, it's how you use it!