402 w/ L92 heads... another wrong cam
402 w/ L92 heads... another wrong cam Here are my latest results. I'm very happy with what I have so far and I'm not finished yet. There have been alot of members saying that you don't need a cam with a wide split to make power with l92 heads, lets add another on to the list. The torque is what I'm most proud of.
Setup:
TSP 402ci
Stock l92 heads w/ PAC springs (milled to 63cc)
7.375 pushrods
Cometec gaskets (.30)
Dynatech longtubes w/ cats
L76 intake
Cam = VRX5 (236/238 112+4)
SCR = 11.5
DCR = 8.8
The before and after is from the 4 inch pipe mod that I copied from Kevin (WKMCD)
STD numbers were 507rwhp and 493rwtq and as you can see, I'm not done tuning. Big thanks to Ron, Kevin, Spin, Pat G and everyones esle who posts good info on this site!
Next up = 1 7/8 headers! anyone care to guess what I will gain?
Setup:
TSP 402ci
Stock l92 heads w/ PAC springs (milled to 63cc)
7.375 pushrods
Cometec gaskets (.30)
Dynatech longtubes w/ cats
L76 intake
Cam = VRX5 (236/238 112+4)
SCR = 11.5
DCR = 8.8
The before and after is from the 4 inch pipe mod that I copied from Kevin (WKMCD)
STD numbers were 507rwhp and 493rwtq and as you can see, I'm not done tuning. Big thanks to Ron, Kevin, Spin, Pat G and everyones esle who posts good info on this site!
Next up = 1 7/8 headers! anyone care to guess what I will gain?
Last edited by 1999vetteroo; Aug 14, 2009 at 09:38 AM.
maybe my cam is hurting me?????????
.... intake 228 ex. 232 @112 lsa.....
Heads flow 368cfm
Also im pulling Kpa's at higher rpm's on the dyno...
What king of intake setup are u running
.... intake 228 ex. 232 @112 lsa.....
Heads flow 368cfm
Also im pulling Kpa's at higher rpm's on the dyno...
What king of intake setup are u running
Last edited by candyblueta; Aug 14, 2009 at 02:45 PM.
To the OP, pretty nice numbers. Bet its fun on the street! I need to get to work on my 387ci build, 400 wheel isn't cutting it anymore, lol.
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Verdad Gallardo Check out the mod the Kevin (WKMCD) did a while back. It definitly works! 4inch pipe and a filter with a 4inch inlet...
Staging Lane
Joined: Jul 2006
Posts: 55
Likes: 0
From: Texas
UHHHHH, you think...lol. that is baby cam if I ever saw one, especially on a 4XX cube motor. Something in the 240ish Intake and Exhaust with 620ish type of lift would work wonders, I bet.
Staging Lane
Joined: Jul 2006
Posts: 55
Likes: 0
From: Texas
To the OP, nice numbers... and yeah I too like how close your TQ is to your HP, very nice.
I also noticed you are running a CenterForce clutch??? How is that holding up, mine only lasted 6 months on a H/C setup (420/390)I had a few years ago, and maybe 20 total track passes and 3000 miles.
I also noticed you are running a CenterForce clutch??? How is that holding up, mine only lasted 6 months on a H/C setup (420/390)I had a few years ago, and maybe 20 total track passes and 3000 miles.
To the OP, nice numbers... and yeah I too like how close your TQ is to your HP, very nice.
I also noticed you are running a CenterForce clutch??? How is that holding up, mine only lasted 6 months on a H/C setup (420/390)I had a few years ago, and maybe 20 total track passes and 3000 miles.
I also noticed you are running a CenterForce clutch??? How is that holding up, mine only lasted 6 months on a H/C setup (420/390)I had a few years ago, and maybe 20 total track passes and 3000 miles.
[/QUOTE]
Nice numbers man, 400+ rwtq at 3000 rpm has got to be fun as hell to drive.
Btw what part of town are you in? Ill have to be sure to steer clear lol.
[/QUOTE]
I'm in North Austin.... But spend some time down in your neck of the woods (A.R.T.)!
Nice numbers man.
I don't know what my 387ci L92 head combo is putting down for horsepower, but judging from the trap speed, it's gotta be around 480+rwhp through a catted y-pipe and a restrictive exhaust. I'm running a wrong cam too I guess.
Mike
I don't know what my 387ci L92 head combo is putting down for horsepower, but judging from the trap speed, it's gotta be around 480+rwhp through a catted y-pipe and a restrictive exhaust. I'm running a wrong cam too I guess.
Mike
Please ignore the post about putting in a cam with mid 240's intake duration. You've done well so far listening to people who know WTF they're talking about.
Your making very nice power and I like the early peak which makes it a great DD setup.
As for Cam.It works very good and the 112+4 helps alot but I'm sure there is a Cam out there that would increase the power from 3k to 4.5k while extending the torque/hp to a higher rpm while not giving up anything over the existing Cam.This is ussually where the split comes in with a longer exhaust duration.
I'll go through my dyno graphs when I have time next week and show the Cam/power differences with a bigger split.
As for Cam.It works very good and the 112+4 helps alot but I'm sure there is a Cam out there that would increase the power from 3k to 4.5k while extending the torque/hp to a higher rpm while not giving up anything over the existing Cam.This is ussually where the split comes in with a longer exhaust duration.
I'll go through my dyno graphs when I have time next week and show the Cam/power differences with a bigger split.
We tested 1 3/4 to 1 7/8 on a 402 and gained nothing...We were kinda pissed but we think once we port the Darts and go to a 3in exhaust will pickup more power..
Right now threw a TH400 were at 460/430 vs 510/520 threw the 6sp.
Right now threw a TH400 were at 460/430 vs 510/520 threw the 6sp.