C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Back from dyno.

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Old Nov 14, 2002 | 04:41 PM
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Default Back from dyno.

First and foremost A/F averaged 11.6 :eek: and at 1 point (4800) it dropped to 11.2! On the mustang dyno it turned out 296hp and 360tq....not too shabby considering how out of tune the fuel is. The part I'm concerned about comes at 4800. The A/F fell to 11.2 and the car dumped 60 foot pounds and 25hp.....the graph looks good up until 4800 and then it nose dives and then immediatly the comes back up at 5300. Which at 5300 my A/F went to 11.8 and then at 5600 the A/F went to 12.2. I just got off the phone with fastchip, he said send the chip in with the wideband graph and he'll pick me up some power. I would love to see 325 and 375 on a mustang dyno!

Can anybody offer suggestions on why it went way rich for 500 rpms?
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Old Nov 14, 2002 | 04:55 PM
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Default Re: Back from dyno. (AS84)

It would be in your VE curves and your PE vs RPM table. It can get really complicated but the PE vs RPM table is the table Ed will change.


[Modified by 89vette, 3:56 PM 11/14/2002]
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Old Nov 15, 2002 | 12:50 AM
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Default Re: Back from dyno. (AS84)

Good numbers, you know there is more left in it.A dynojet would yield higher numbers yet.Your rich spot is in the fuel mapping.Sounds like Ed needs to work on it some more. :cheers:
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Old Nov 15, 2002 | 10:29 AM
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Default Re: Back from dyno. (tpi 421 vette)

I was surpised at how anxious the fella was at fastchip to fix it for me...no problems!
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