new C5 dyno

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Aug 5, 2007 | 06:29 PM

k-mart

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From: Hanover, MD

new C5 dyno

I just picked up a new to me C5 with what are supposed to be Stage II LS6 heads, G5x2 on a 114 lsa, and almost all supporting mods. I was never able to get an exact answer who did the heads and I cannot see a casting number anywhere on them. Anywho......here's the graph:

How's that look to everyone? There's some surging below 1500 rpm and I'd really like to move the curve down about 1000 rpm. Any suggestions?

Thanks,

Kevin

Aug 5, 2007 | 06:39 PM

KONG

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If it is 114 try 112 lsa. It will help move powerband lower. it will have a choppier idle but there is always a trade off. Great numbers though

Aug 5, 2007 | 06:59 PM

355sonoma

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Good numbers. . . . I noticed that they're standard what are the SAE numbers?

Aug 5, 2007 | 08:07 PM

k-mart

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I don't know what the SAE numbers would be. This is the sheet that came with the car and was done before I bought it. I've read that STD is +4% compared to SAE so draw your own conclusions I guess.

Aug 5, 2007 | 08:41 PM

Frost

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your surging is common, it's an easy thing for your tuner to fix, or are you DIY?

Aug 5, 2007 | 10:28 PM

k-mart

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Well, I have a friend that's done a bit of tuning and we have access to EFIlive. It was searching for idle a bit when I first got it but he tuned it down and its doing much better. I'd like to see if we can get it running better before I start swapping cams.

Aug 6, 2007 | 04:06 PM

Frost

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From: Richmond VA

Have him begin by pulling timing down in the hi and lo octane tables respectively in the area that you are cruising at and verify that running airflow isn't too high

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