LigHtEmUp01

car made 277rwhp and 339tq. i think the car should have made more. does anyone else think that with the torque it put down i should be alot more hp?

gregrob

iTrader: (8)

Show the graph. What cam, compression, what's the tune look like.

henry172

iTrader: (2)

Something is not right I put down 310 with a stock 100k motor with the hotcam only. 355 pp heads and intake should do better than that even with a stock cam

LSWHO

iTrader: (1)

How's your transmission feel?

LigHtEmUp01

my cam is a comp cam and its close to a lt4 hotcam. the heads are not very good ported they didnt mess with anything around the guides. and my tranny feels good but i think i have a weak stall.

henry172

iTrader: (2)

If you don't already have a quality stall I would go out and buy one asap; the lowest quality I would buy is the edge racing stall, I have a edge 3200 that I am really happy with.

97Z28SS

iTrader: (5)

Is your car still on a stock tune?

WS Sick

So the head porting didnt involve bowl work? If the heads are just a better valvejob you may not gain much if any there. What tune if any is in it?

n2oblkz

iTrader: (1)

My car made 300 RWHP and 314 RWTQ with bolt-ons, long tubes, exhaust and stock tune.

rich5368

iTrader: (2)

I'd think with boltons and a hot cam you would be a little closer to 300. Kinda seems to be the norm with boltons and a small cam in these things to be between 290-330 somewhere.

lt1-xjs

I put down 309 rwhp, 336 tq with bolt-ons. The Hotcam with ported heads should be in the 350-360 rwhp range. The tune or something is way off or the dyno is incorrect. Take it to the track, you should easily run low 12's.

mguidry629

iTrader: (6)

Easily run low 12s is a far stretch. If your running low 12s in a 3500lb car, your putting down 380-410hp. I know a lot of variables go into the equation other than HP, but I'd be happy to run 13.0s with a stock bottom end and ported heads. I'm aiming for low-to-mid 12s in my 383 w/CC280xfi, ported heads, 11.5 compression, with all the bolt ons, 3.73 gears, etc. If he can easily run low 12s, then I should be easily running high 10s, so I hope you're right, but I just can't see it.

96capricemgr

iTrader: (1)

Mild HOT-camish and ported heads should be in the 12s.

If you only get low to mid 12s out of a 383 with that XFI cam and ported heads in an f-body your build is the definition of a failure. Heads/cam junkyard shortblock 4200lbs b-body can run 11s with less cam, with 3.73s, 11.2:1 compression, mechanical waterpump.
A hydraulic roller 383 with ported GM heads can do high 10s, your's won't but it can and has been done, heck there is even a heads/cam stock shortblock Impala in the high 10s.

People use mediocre parts and set the bar low and then refuse to believe in what actually works well.

Far as the original poster's issue, run it at the track, maybe the dyno is just wrong, such a setup should be making more power than that though.

93M6Formula

Yeah that is absolutely not right, my car put down 280/312 with a ram air box and a cut off muffler and 291/323 with LT's. Better get that checked out.

slomarao

iTrader: (6)

yah i got my bolt on car to do 323rwhp with a buddy cleaning up the heads and intake a tiny bit. My car is a m6 so it will dyno better but something isnt right with your setup

lt1-xjs

I would expect mid - high 11's with your set-up.

96capricemgr

iTrader: (1)

If the heads were ported WELL yes but so many people choose to mangle heads instead of do them well.

05HD

Tons of speculation in here without even a dyno sheet posted.

WS Sick

Speculation makes the world go round....

mguidry629

iTrader: (6)

Not sure why you have to be so arragant about all this. You act like you know I'm an ignorant moron based on a couple posts. I'm on here looking for advice when i need it and dishing it out when I can. I usually stay in the background and read and learn without posting, but I'm in the middle of a build and needing to make some decisions at the moment. It seems like you're on here looking for people doing something the wrong way so you can criticize them. That may not be the case, but that's the way it comes across. I'm sure you've heard that before, so I'm probably not sharing any breaking news.

I said I'm aiming for low 12s. I don't want to expect 11s, then get disappointed. I'd rather lower my expections and be excited when I surpass them. Sure you can run low 12s on a hotcam or similar, but should everyone expect to? I just didn't want the OP to get dissappointed when he went to the track like he did at the dyno. Everyone sees a cam and says "you should run x.xx with that cam", but the truth is that there are so many variables that go into your ET that all you can really say is what's possible, not what's probable.

If someone buys an LT1 car these days, they're looking for cheap American muscle. Not many other American made V8 cars in good running condition for the price of LT1s. Then they see a cam is only $300 or so. Then they learn about the supporting costs that go with it. That $300 cam just turned into $600-800 or more. Intake, exhaust, tune and you're past $1,000. Then you get on a site like this and realize that it takes thousands of dollars to build what you really want, so you piece meal it and get impatient and just throw it together and of course **** breaks and doesn't meet your expectations. But it's still fun and I'm enjoying the hobby, even if my build meets your definition of failure.