And----there are not that many "bolt-on" lt1s that will put a 100 extra RWHP on with just a cam and headers.JMHO

 

Not sure I getcha completely but my answer would be the heads.

The LS1 has far superior heads are far as valve angle and flow from the factory. And this one is putting out what a cammed LT1 puts out. In theory, it should be putting out more.

The tune may be conservative, and the intake a restriction, but I would expect more from an LS1 with similar modifications to a cammed LT1 because of the heads at a minimum. Right now my LT1 puts out far more power and isnt that racy, and the mileage is pretty decent (27mpg hwy)

I want to make sure I'm not leaving power on the table somewhere. It has stock rockers but it seems as if the stock rockers on an LS1 are far superior to those on a sbc. I was thinking 37x RWHP in this form would be typical. Maybe it's true the C5 has more drivetrain loss so that may be where the numbers are going. I'm also trying to see if it was a mustang or dynojet.

 

oh yeah my 224/230 cammed LT1 with stock heads, full exhaust, rockers, tune, tb, pulleys, and all the trimmings made 350 at the wheels through an M6... my new stroker makes 420 easy.

 

The LS1 C5 vette dynos stock around 300 RWHP (counting the superiority of the heads, plus all the other little goodies that give the LS1 bigger numbers than the LT1. The thread leads me to believe that the heads are stock so that we start with 300 RWHP and wind up with the 354 by adding a relatively mild cam and some LTs. I.e., he is getting an extra 54+-RWHP with the addition of a cam and Lts.

Assuming that the dyno didn't lie, I would guess that it is pretty much in the ball park---i.e, believing it should be making around 370 RWHP with those mods is, is in my opinoion, optimistic.

Just sayin'....

 

Cam = 30-50 (I'm not familiar with that specific cam so I can't be more specific)
Full exhaust including LTs, high-flow cats, X-pipe, and a Corsa catback = 20
Tune = 10 (probably more)

Is that what you wanted?

 

Okemos?----former Lansingite here. You are right about taking the specs of the cam into consideration----although when the cam is coupled with the right head combination---that's where you get the power. A cam alone doesn't usualy provide 50 RWHP, especially a mild one. JMHO

 

Yeah, Okemos. Lived here almost two years now; originally from GR. Did you go to State?

A "mild" cam in the LS1 world is usually something like a 224/224, and those guys seem to pick up 30hp or more. This is a 226/230, so I figured it was a little hotter. I know very little about cams, so I could be wrong here, but I do understand that in general, more duration means more power.

 

for reference i was told my 233/233 .589" 112 cam was a consistent 50hp gain.

 

Im almost tempted to swap to a 'budget' LS1 head and pop on an LS6 intake and port the tb and have it retuned. Maybe I'm alittle overboard here but I expected more from a cam and bolt on LS1 than from a cam and bolt on LT1. that cam is fairly stout for stock heads and intake so I will put on an LS6 and take it from there I suppose.

I've heard anywhere from 5-25 RWHP just off the intake and the throttle body. Between both, I'm not expecting more than 12-15.

 

the 354 rwhp on the c5 is pretty on par i just got back from the dyno and there was a guy with a 01 Z06 with a cam and LT's his #'s were 376 rwhp

 

That sounds reasonable for a 98 LS1 car. I've seen a fair share of LS1's at our dyno and the early ones consitently put down less power. I have a buddy with an 01 SS with LT's and a GMMG exhaust who made 354/352 on the dynojet. The next week, a cammed/bolt-on LS1 camaro made 348 rwhp! From what I've heard, alot of the newer LS1's had better flowing intakes.
Also, when I picked up about 30 ft-lb of torque after gutting my high flow Random Tech cats--I also picked up a consistent 2 tenths at the track. As far as I'm concerned, those "high flow" cats are not any better than the stock ones and were a HUGE waste of my money.
One other thing, if you haven't already, you would probably benefit slightly from a tune if you have not already.

 

Yeahit's been tuned. And it doesnt have the good (LS6)intake, it's got the regular LS1intake on it. Damn space bar doesnt work half the time lol

Yeah I'm starting to think the cats might havesomethingto do with it, I will make sure to check them next time I get the chance and gut them if necessary.

I'm contemplating a 6.0 build so I'm not too concerned about this motor so much, it has 142k miles on it which might also be a contributing factor.

 

If you want to keep fooling with it, you need to get a proven cam like the Futral Motorsports F13, F14, or F15 along with an LS6 intake manifold and a ported TB.

That'll make over 400rwhp.

There's NO reason why you're 50 rwhp low even without an LS6 intake and a ported TB. You're engine is probably getting tired, so I replied on your other thread.

 

F14 on a 114 doesnt look bad to me. Should be plenty streetable in a 408.

I'm thinking the motor might be a little tired too. As far as I know, the heads have never been off! Might be leakdown test time. Still runs good though it's out of it's prime.

 

holy **** dude....after all this you NOW tell us that its got 140K miles on it...that alone could account for a considerable lack of performance.

and the LS6 and ported TB on that setup should easily yield 15hp...if not more.

and a FM14 in a 408 is REALLY small...that cam would probably be considered tame in a 382ci stroker.
i know i was told by one of the vendors that my 233 would be pretty small for a 382 setup.


if you're still looking to for power out of you current setup...the new intake is the first thing to do