408ci build, expectations/suggestion.......
05-23-2012, 06:03 AM
#63
Yah, I mentioned earlier in the thread that most (not all) cams designed w/ similar specs to yours are designed to make power through 6800-7K RPMS. Yours stops @ 6200-6300 RPM, similar to smaller cams. IMO, part of the several contributors to the lack of "peak" power is that you aren't taking advantage of making power through 7K. Torque is good which really eliminated the need for a leak down test. Torque likely would have been a sealing issue indicator, had there been an issue.
05-23-2012, 06:10 AM
#64
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Yah, I mentioned earlier in the thread that most (not all) cams designed w/ similar specs to yours are designed to make power through 6800-7K RPMS. Yours stops @ 6200-6300 RPM, similar to smaller cams. IMO, part of the several contributors to the lack of "peak" power is that you aren't taking advantage of making power through 7K. Torque is good which really eliminated the need for a leak down test. Torque likely would have been a sealing issue indicator, had there been an issue.
The cam specs are slightly larger than the vindicator, Almost like s modified TRex.
So I wouldnt think that would be the killing factor. We've heard soooo many different opinions in the last few days that its hard to narrow things down. Ive had some say the cam is too big, others say it is too small. Next says heads support up to 500whp, another says heads are terrible. Then on too Lts, FAST90 choking it, Next says intake is fine headers might help some.
And the list goes on..........
05-23-2012, 06:29 AM
#65
Just trying to help, my friend.
I don't know Shoff101 or anything about the history of this car. It's not an opinion, it's fact. The cam is not making power above 6200 RPM. HP is a combination of TQ & RPM. So, the fact is that HP will increase w/ RPM, as long as the cam will support it. Those heads will. From the dyno, it appears that the cam is designed through only 6300 RPM. This should be confirmed. Most of the guys who show the higher numbers are spinning to 7000 RPM. Therefore, taking full advantage of the RPM as it relates to HP.
05-23-2012, 08:38 AM
#67
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I didnt install anything on the car for this build, would have to ask the owner......
Last I knew the Cam was not degreed.
Not getting personal LS1-450, just saying others have said the cam is too large, too small, fine. Or its the heads, intake, headers, Maf, CAI, etc..... Had Mr. Tony Mamo take a look at the other thread he didnt see anything to really be holding it back that much and advised to drive it, or tear it down and inspect it.......
Kurt urban thought the piston combination was odd but thought the car may still be quick.
Guess its a decision for shoff101 to make........ his car/his build/his money
Last I knew the Cam was not degreed.
Not getting personal LS1-450, just saying others have said the cam is too large, too small, fine. Or its the heads, intake, headers, Maf, CAI, etc..... Had Mr. Tony Mamo take a look at the other thread he didnt see anything to really be holding it back that much and advised to drive it, or tear it down and inspect it.......
Kurt urban thought the piston combination was odd but thought the car may still be quick.
Guess its a decision for shoff101 to make........ his car/his build/his money
05-23-2012, 08:42 AM
#68
I'd have to agree with Tony. Besides trying to replace the Volant, I'd just drive it and enjoy it, or if it bothers him that much...tear it down. I was about 20-30hp short than what I thought I'd make on my setup. Instead of worrying, I decided just to be happy with it. Considering I have less in my whole long block than a set of aftermarket head castings costs, I figured I'm doing ok.
05-23-2012, 08:52 AM
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I'd have to agree with Tony. Besides trying to replace the Volant, I'd just drive it and enjoy it, or if it bothers him that much...tear it down. I was about 20-30hp short than what I thought I'd make on my setup. Instead of worrying, I decided just to be happy with it. Considering I have less in my whole long block than a set of aftermarket head castings costs, I figured I'm doing ok.
05-23-2012, 10:44 AM
#70
Granted I'm running a 255/263 cam in mine, but mine pulls hard as hell to 8,000 which is where my fuel cut is set, and if I raised the fuel cut it might pull farther....but this was the rpm I picked to shut down at till I get it on a dyno and can see the curve.....is think his should pull well to atleast 7,000.
I wonder if the cam isn't several degrees off, either installed wrong, or ground wrong.
I wonder if the cam isn't several degrees off, either installed wrong, or ground wrong.
05-23-2012, 12:21 PM
#71
