VRX4 w/ 243s
I would say the numbers are slightly low. My Z28 had the VRX3 cam and made almost the same power with stock heads and stock LS6 intake. I would think you should be around 420rwhp. It could be in the tune. Do you have a copy of the dyno graph? However, dyno numbers arent everything. Get it to the track in the spring and see what it runs.
No work to them what so ever. Came off an LS2 w/ 80 miles then straight onto my car. All gaskets and bolts came from the GM kit from texas speed. I don't know anything about compression all I know is what VENGEANCE RACINGS TECHS told me! Including Mike the tuner! I'm not trying to get mad or anything but if it didnt lower it and in fact raised it then I'm not the one who gave the false statement they were.
Still wondering what could have caused the lower numbers, weither it be in my set up or in the tune. Any ideas?
Still wondering what could have caused the lower numbers, weither it be in my set up or in the tune. Any ideas?
As for your power 400RWHP from a stalled auto isn't horrible - it might be 5-15HP less than expected but as mentioned take it to the track to see what it traps. Trap speed plus the weather conditions and your race weight will help determine what it's really making.
I would say the numbers are slightly low. My Z28 had the VRX3 cam and made almost the same power with stock heads and stock LS6 intake. I would think you should be around 420rwhp. It could be in the tune. Do you have a copy of the dyno graph? However, dyno numbers arent everything. Get it to the track in the spring and see what it runs.
Atlanta and we still have like 6in of snow..rediculous lolBut thanks for all the input guys! I'll check on this compression thing and post up my graph as soon as I can. I'll also look in to the tune a little bit.
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
It seems down a little on power, not much. The autos just dont dyno well. A trip down the track and a look at mph would be a good indication of the dyno indicating slightly low or not. I am running a very similar setup and would hope to crest 400 although not by a ton. My car feels strong though and thats whats important. Coming from a TR224/241 heads to a Cam Motion 228/232 with 799 heads I feel like I picked up 40 hp. And thats what really matters 
And +100 on compression going up. You went from a 67cc chamber to about a 63 (I think). Not gonna make a ton of difference on the dyno though.
And +100 on compression going up. You went from a 67cc chamber to about a 63 (I think). Not gonna make a ton of difference on the dyno though.
yup.... your power is kind of low. I have a factory LS6 and I would be really bummed to have a cam of that size combined with a Fast making 400. My older stalled LS1 auto with the MTI X1 made 377,387,395 on three different dyno's with a Vig 3600 and 806 heads. The highest dyno was with the LS6 intake too...
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my car made 414rwhp/390rwtq at RPM in lewisville tx this was with just a RPM 5 cam long tube headers,true duals, TSP lid,Yank 4200 stall and Sam88gta1 tuned it's a stock block,intake, tb,241 heads,and no pulley or ewp and thru a stock 3.23 rear! so i would think your heads would have made the numbers a bit more?
