Disappointing VR Ported FAST92 Results
10Rwhp over the entire graph.... Yes please!!!
I wouldn't be thinking 15Rw minimum with a 346 on just an intake swap... That is getting pretty high... 10-15Rw is what I would expect for a 102.
I wouldn't be thinking 15Rw minimum with a 346 on just an intake swap... That is getting pretty high... 10-15Rw is what I would expect for a 102.
IIRC the porting they do is mostly just removing the bump in the runner and I'm not sure they take them apart. I could be wrong but it seems that was posted here with pics by someone who had it done.
If that's the case, it definitely seems on the lower side of right. If you had a setup that revved higher you would probably see higher gains but the ls6 should still be pretty efficient below 6500rpm.
If that's the case, it definitely seems on the lower side of right. If you had a setup that revved higher you would probably see higher gains but the ls6 should still be pretty efficient below 6500rpm.
IIRC the porting they do is mostly just removing the bump in the runner and I'm not sure they take them apart. I could be wrong but it seems that was posted here with pics by someone who had it done.
If that's the case, it definitely seems on the lower side of right. If you had a setup that revved higher you would probably see higher gains but the ls6 should still be pretty efficient below 6500rpm.
If that's the case, it definitely seems on the lower side of right. If you had a setup that revved higher you would probably see higher gains but the ls6 should still be pretty efficient below 6500rpm.
Like I said, the work Vengeance did looks to be great, but I do think my "smallish" cam is holding back the potential of the heads/intake. Thinking about stepping up to the G5x3 on a 114lsa would really wake it up.
Phil said that because there wasn't a whole lot to be gained. I doubt the way Vengeance ports it would hurt power.
Anyway, I was looking at your mod list again, and I think I know why it didn't hit a higher peak gain. A better exhaust and a cam with more overlap would probably show more gains.
Remember, the whole thing is just a giant airpump. Being able to evacuate the exhaust in the overlap phase is where the gains come in at 6k+. Having an exhaust that can't keep up or a cam that doesn't have a tremendously long overlap cycle will cut down on the peak numbers. I think the Y-Pipe and 1-3/4" headers are hurting you there. The TV2 has decent overlap though, so that should support the FAST making bigger gains uptop.
Anyway, I was looking at your mod list again, and I think I know why it didn't hit a higher peak gain. A better exhaust and a cam with more overlap would probably show more gains.
Remember, the whole thing is just a giant airpump. Being able to evacuate the exhaust in the overlap phase is where the gains come in at 6k+. Having an exhaust that can't keep up or a cam that doesn't have a tremendously long overlap cycle will cut down on the peak numbers. I think the Y-Pipe and 1-3/4" headers are hurting you there. The TV2 has decent overlap though, so that should support the FAST making bigger gains uptop.
Phil said that because there wasn't a whole lot to be gained. I doubt the way Vengeance ports it would hurt power.
Anyway, I was looking at your mod list again, and I think I know why it didn't hit a higher peak gain. A better exhaust and a cam with more overlap would probably show more gains.
Remember, the whole thing is just a giant airpump. Being able to evacuate the exhaust in the overlap phase is where the gains come in at 6k+. Having an exhaust that can't keep up or a cam that doesn't have a tremendously long overlap cycle will cut down on the peak numbers. I think the Y-Pipe and 1-3/4" headers are hurting you there. The TV2 has decent overlap though, so that should support the FAST making bigger gains uptop.
Anyway, I was looking at your mod list again, and I think I know why it didn't hit a higher peak gain. A better exhaust and a cam with more overlap would probably show more gains.
Remember, the whole thing is just a giant airpump. Being able to evacuate the exhaust in the overlap phase is where the gains come in at 6k+. Having an exhaust that can't keep up or a cam that doesn't have a tremendously long overlap cycle will cut down on the peak numbers. I think the Y-Pipe and 1-3/4" headers are hurting you there. The TV2 has decent overlap though, so that should support the FAST making bigger gains uptop.
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On The Tree
Joined: Nov 2008
Posts: 105
Likes: 0
From: Fort Worth, TX
Same results here...
http://forums.corvetteforum.com/perf...level-2-a.html
FWIW here's my results with swapping to 1.875" headers...
http://forums.corvetteforum.com/perf...s-results.html
http://forums.corvetteforum.com/perf...level-2-a.html
FWIW here's my results with swapping to 1.875" headers...
http://forums.corvetteforum.com/perf...s-results.html
TECH Addict
Joined: Apr 2009
Posts: 2,354
Likes: 2
Same results here...
http://forums.corvetteforum.com/perf...level-2-a.html
FWIW here's my results with swapping to 1.875" headers...
http://forums.corvetteforum.com/perf...s-results.html
http://forums.corvetteforum.com/perf...level-2-a.html
FWIW here's my results with swapping to 1.875" headers...
http://forums.corvetteforum.com/perf...s-results.html
