low dyno numbers?

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Nov 28, 2003 | 01:12 PM

#31

airflowdevelop

Registered User

Joined: Jun 2003

Posts: 203

From: York, PA

That combo should like 12.8 - 13.0 :1

Looks like you have one of 2 problems going on...either not enough spring pressure, or you need to check your vavle adjustment.

Dennis

Nov 28, 2003 | 06:55 PM

#32

NXz28

Thread Starter

Registered User

Joined: Jul 2002

Posts: 368

From: Tampa, FL

Quote:

Originally posted by Rival
The vavletrain did you put in: new lifters, 1.6rr, etc. how much did you build that. Because if you have only an ok vavletrain and don't know how good the heads are w/stock vavles, no dnyo tune, that could account for the 25-30 rwhp your looking for. Right now I would throw an electirc water pump on, 1.6rr(if you don't have em) and dyno tune it. That could make 15hp more.

already have 1.6 rr's

So anybody know what a 12.5- 13.0 equals in mv on the o2's....?

Nov 28, 2003 | 07:17 PM

#33

engineermike

Registered User

Joined: Mar 2002

Posts: 2,743

From: Baton Rouge, LA, USA

Since I saw a Wide-band show 12.5/1 while the factory O2's were ranging from 750 - 950 mv, I've written them off as a tuning tool.

Mike

Nov 29, 2003 | 02:36 PM

#34

BobRocket

Registered User

Joined: Jun 2000

Posts: 24

From: Spring Hill, FL USA

I have had good luck getting a "correlation" between actual A/F and stock O2's. However, I only have this correlation for turbo buicks. Anyone ever done this for LT1's?
I know Wideband is the way to go, and I'm working on one but until then...