Did you get any knock retard?? I have heard of a few people running lean when they put on the baker hose. You might want to ATAP the car and check kr, and see if its rich or lean, then get a MAFT or tuning to compensate for the new intake mods. Was there a change in temp at all between the two dynos? Have you reset the computer at all since the intake mods? Any more info you have would probably help. Hope you get it sorted out.
-dan

 

You can get that much difference between two dyno runs on the same day. What were the atmospheric conditions between the two days. From what I have seen for yours mods between runs you really should not have expected any gain. Throttle body mod will not give a gain, might check you spark plug gap and see if you had any knock.

Gary

 

I would check out the spark plugs and knock retard.Also was this on the same dyno jet with the exact same variables as before temperature etc...

 

I need some suggestions.

Last July (July 2001) I had my 2000 SS dyno'd on a DynoJet dynomometer, with the following results: SAE corrected 329.3 rwhp, 332.4 rwtq, air-fuel ratio average = 12.7. Yesterday, June 1, I had the car dyno-tested also using a DynoJet machine, with the following results: 318.3 rwhp (also SAE corrected), 327.0 rwtq; air-fuel ratio average = 13.

We're looking at a net SAE horsepower loss of 11 rwhp, which is more than can be attributed to the difference between two DynoJet apparatuses, I believe. The following power mods were in place for both sets of pulls: SLP LM exhaust, SLP Y-pipe, SLP stainless cold air pickup, SLP 85mm MAF, Direct-Flo airlid. The engine, MN6 transmission and real axle were in both cases filled with Red Line synthetic lubricants.

Additional mods and/or new parts in place for yesterday's dyno run were as follows: Baker hose, throttle body coolant bypass, NGK TR55 plugs gapped to .055, new MSD plug wires, and stock Corvette fuel rail covers cut to fit the Camaro engine compartment (can't see any effect there because the hood was wide open for the dyno run).

Also, for yesterday's run, the Holley Powershot air filter (in place for the July 2001 pulls) was removed entirely, and the intake manifold was cooled with ice bags for around 1-1/2 hours before the pulls. As of yesterday, the car had a little over 39,000 miles on the odometer, approximately 10,000 miles more than last July.

I was expecting a small power increase from the combination of new Baker hose, TB bypass and no air filter, rather than a power loss. Any ideas where my missing 11 horses went? (Someone suggested my cats might be solidifying, for example...)

All thoughts welcome-- thanks!
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