Back from the dyno
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Back from the dyno
Well, it was a good day overall, but not perfect. The bad news is that it looks like I need to replace the Opti (yay), I have a very bad missfire, so bad that the dyno graph cuts out 4300-5000rpm.
But there was some decent news...even with the huge miss, and only revving it up to 5800 it still put down 415RWHP and 390 RWTQ, so I'm not overly disappointed. The engine was built to rev to about 7000 and it really wants to get there!
So I'll replace the opti and go from there!
I have to hook my scanner up to get the graph scanned in, not sure if I'll have time to do it tonight or not, not really much to see though in terms of a problem as it's very apparent!!
But there was some decent news...even with the huge miss, and only revving it up to 5800 it still put down 415RWHP and 390 RWTQ, so I'm not overly disappointed. The engine was built to rev to about 7000 and it really wants to get there!
So I'll replace the opti and go from there!
I have to hook my scanner up to get the graph scanned in, not sure if I'll have time to do it tonight or not, not really much to see though in terms of a problem as it's very apparent!!
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Congrats 
Sounds as if you had a similar problem as me the first time I tried to dyno tune my car. I had a dead miss at 3600 RPMs. It ws so bad the Dyno operator made me do the pulls because he didn't want to be responsile. It was crazy the thing would pull good backfire at 3600 then pull fine for the rest of the pull. I replaced the opti and it corrected the problem. Those are some good numbers, how was the A/F just to make shure it is a spark problem and not a lean missfire.
Sounds as if you had a similar problem as me the first time I tried to dyno tune my car. I had a dead miss at 3600 RPMs. It ws so bad the Dyno operator made me do the pulls because he didn't want to be responsile. It was crazy the thing would pull good backfire at 3600 then pull fine for the rest of the pull. I replaced the opti and it corrected the problem. Those are some good numbers, how was the A/F just to make shure it is a spark problem and not a lean missfire.
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Very nice! It sounds like once the missfire is cleaned up the beast will really make you happy.
Congrats
Sounds as if you had a similar problem as me the first time I tried to dyno tune my car. I had a dead miss at 3600 RPMs. It ws so bad the Dyno operator made me do the pulls because he didn't want to be responsile. It was crazy the thing would pull good backfire at 3600 then pull fine for the rest of the pull. I replaced the opti and it corrected the problem. Those are some good numbers, how was the A/F just to make shure it is a spark problem and not a lean missfire.
Sounds as if you had a similar problem as me the first time I tried to dyno tune my car. I had a dead miss at 3600 RPMs. It ws so bad the Dyno operator made me do the pulls because he didn't want to be responsile. It was crazy the thing would pull good backfire at 3600 then pull fine for the rest of the pull. I replaced the opti and it corrected the problem. Those are some good numbers, how was the A/F just to make shure it is a spark problem and not a lean missfire.
415rwhp..... nice.....please tell us what mods you have done
All forged 383 LT4
11.2:1 compression
Heavily ported and worked LT4 heads and intake
242/252 duration .55x/.56x lift 110LSA cam
Electric water pump
TPIS long tubes
Corsa cat-back
LTCC LS1 coil kit
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Here's a scan of one of the dyno sheets, this was the second run we made. My tuner has the final run, but this one is pretty close, just a couple HP an TQ off...but it gives you a good look at the miss!
Last edited by Zix; Sep 18, 2005 at 10:38 PM.
