Tree DR

Lets not get into how right now. If you had no negative suction from the air filter. What would that do to your motor? If you had a positive air flow like 1 or 2 psi all the time what would that do to your motor? Would it be good or bad?

Tree DR

Well I had to give it a try. Someone has to keep you guy and gals thinking. At idle I figured it would give you a lot more torque. At higher rpms it might over speed the turbo.

omaharam

One serious problem I see, is that when you lift off the throttle and the air backs into the turbo, you would have pressure from both sides - BAD!

Tree DR

Well the positive air flow works. Look at the intake fan thread for dyno results.

CamperAndy

Positive air flow would be like twining. The main result would be faster spool up and higher boost from the turbo.

Tree DR

This intake fan obviously helps spool the turbo since it's showing 112hp vs 70 at 1700rpms. Torque is 320 vs 224. I'm going to try and upload the dyno sheets again.

jkitterman

When you dynoed with out the fan, you removed it completely, correct?

Tree DR

When I dynoed with out the fan first I borrowed a stock air box with my filter in it. Then I took the air box off just the intake tube. Then I forgot to hook the IAT back up and it went into limp mode. Nice haveing a scan gauge. www.scangauge.com I was able to scan for the codes and clear them right then. John was starting to do the key on off method.
When I get the dyno sheets loaded you will see what I'm talking about.