85 Corvette Dyno pull
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Instructor
Joined: Jun 2019
Posts: 147
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From: Rockland County, New York
I know, 13k is super low. As I said above this was in my family since new was driven super infrequently with 2 periods of not being driven for years. Each time I was the one to give her love and bring her back around. The latest being last year after she sat for 13 years. And yes, I believe it was a dynojet.
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Skiiped the responses...if you have an auto and 20 percent loss your torque is about right, hp down a bit.
Coule be tired, the dyno who knows. If it feels good just run it
Chips didnt slow me down, didnt pick it up either just furned fans on earlier.
Dynos can be interesting tuning tools or use to compare one mod to the other...wouldnt pay much attention to them though
First car I dynoed was done on an old Clayton piece, barely made over 200 to the ground, 3xx tq. 10:1 350, 280 cam headers etc. Ran strong though.
Coule be tired, the dyno who knows. If it feels good just run it
Chips didnt slow me down, didnt pick it up either just furned fans on earlier.
Dynos can be interesting tuning tools or use to compare one mod to the other...wouldnt pay much attention to them though
First car I dynoed was done on an old Clayton piece, barely made over 200 to the ground, 3xx tq. 10:1 350, 280 cam headers etc. Ran strong though.
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
My prior '88 A4 was getting ~15% DT loss, comparing DynoJet pulls with trap speed/weight chp calculations.
I was running ~12.6 A/F through most of the pull range, which was the target value.
You might try:
-160deg T-stat, open the connector in the AC line to keep fan on, if your chip doesn't handle that function
-open the air box lid (though I also run a K&N filter, not sure that is really beneficial)
You will pick up some power by replacing that front Y with a 2 1/2" SS cat-less unit.
Since A/F is dropping off with RPM, you might attach a gauge to the Schrader, tape to the windshield and do a WOT pull on the Thruway to see if FP holds. If not try a new fuel filter.
Also, what was the DA in the shop during those pulls. That can make for a sizable power difference, as I experienced at Englishtown (back when they had the drag strip).
I was running ~12.6 A/F through most of the pull range, which was the target value.
You might try:
-160deg T-stat, open the connector in the AC line to keep fan on, if your chip doesn't handle that function
-open the air box lid (though I also run a K&N filter, not sure that is really beneficial)
You will pick up some power by replacing that front Y with a 2 1/2" SS cat-less unit.
Since A/F is dropping off with RPM, you might attach a gauge to the Schrader, tape to the windshield and do a WOT pull on the Thruway to see if FP holds. If not try a new fuel filter.
Also, what was the DA in the shop during those pulls. That can make for a sizable power difference, as I experienced at Englishtown (back when they had the drag strip).
Thread Starter
Instructor
Joined: Jun 2019
Posts: 147
Likes: 48
From: Rockland County, New York
