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

I am very interested in seeing some of the logs.

What are you using to monitor knock?

Having that much knock at the 0 psi is a big red flag. I would definitely like to see your map/logs.

I say you just keep blaming the log manifold and the "reversion theory"

You guys can sit here all day and say what the car "Should be doing" and keep running into problems but, when people who have actually done it are giving advice it gets challenged by "Theroy"

Amazing!!

All I will say is again like I have mentioned a million times. My boy Gio ran 11.5 at 130 mph with a log manifold on stock 2.0 cams. Its all in the tuning not theory.

The larger trim of my turbine will offset the increase of backpressure from the higher pressure ratios i have to push to make boost. Vadim has a lower trim turbine, that is more restrictive. So it is probably a wash.

If a log manifold and a turbo like Vadim's has worked... prove it. Post a dyno chart of someone making over 300whp, or have them throw in their two cents. Anyone here making over that amount has a much larger turbo.

This guy had the same issue as Coheed and myself.
Modifications II Page 3



He is running similar log setup as I am and Coheed was.



Here is his testimony after installing the VET cams.



Sure thing, the only thing is they are TunerPro TunerCode files, unless you have tunercode they are paperweights.

The 0 psi timing was from one of Calum's VE tunes. I took the whole map, then pasted the right most column about 3-4 columns before the end, adjusted TP scales and started reducing 2* per psi. Now I did start seeing a lot of knock was due to the ECU inter-plotting. Basically if your TP scales where to far apart, say 55 is 0 psi and 3 psi was 75. Then it would knock between 55 and 75tp. Even thought 3psi timing would be spot on. What I started doing instead is not leaving more then 10TP between the columns for that reason. Thus I made a 65TP which is about 1-2 psi, and adjust the timing appropriately.

This helped reduced the knock greatly, but still seeing some odd points on where it would knock.

And again... he is a gutted race car with a much much larger turbo. About the only thing they have in common is a T3 flange.

Not hating, but that is common sense.

Vadim please post your recordings of MAF voltage when your cams are switching.

Gio also ran a 11.8 in the mid 120's with a 50 trim turbo which his brother is now using on a VE/DE set up. The car cleared 300 whp with no problems.

I will ask him to post up a sheet.

Or I could be lying.

Hence again the everything gets challenged mentality.

There you go talking with out knowing. Did theory tell you Gio's car was gutted?

It is a 100% full body SE-R with AC. Probably the heaviest SE-R I have even seen actually.

I think the only weight reduction he had was remving the two car seats from the back.

I will definitely make sure I get a bunch of charts together.

From the T3/T25 bone stock VE to the larger frame turbos.

I believe the small T3 car made 220-230hp at 9 psi on stock 2.0 cams swicthing over at 4400rpm when it was all said and done. It was an interesting timing map it liked, but it worked and worked well.

The latest one a few weeks ago on a log/ t3/to4e 57 trim on stock cams made 285@ 15psi on a 90-95 degree day and 311 at 17psi with a 110/93 mix. Again on a bone stock VE long block.

That looks scientific... I can see other things that could have changed (without him noticing) while he swapped cams to make the difference in felt power.