firstls1vette

Got my car running and off the dyno today. I'm a little disappointed with the numbers it put down though. I put 2.5 5.3 heads, and a torquer v3 cam, Hardened pushrods, ls7 lifters, ls2 timing chain.

It put down 411 rwhp and 380 tq. Just seems like I'm leaving a lot on the table. My tuner said I should have gone with better long tubes, I knew the ones i have (obx) are not real great but I would think they would be a huge restriction.

Another thing he suggested was to get rid of the factory air bridge. I guess that might help a little. I'm just wondering what you guys suggest, just seems like the kinda power is what cam and bolt-on ls1s do

Higgs Boson

iTrader: (3)

pushrods, lifters and a timing chain don't make power.

you have a stock engine with heads and cam and headers? well if it's just slapped together and "tuned" that's all you might put down, especially if it's a low reading dyno or if you are at high elevation. if your tune is solid then don't worry about the numbers. go to the track and see what MPH you can run.

mark21742

How does your whole dyno sheet look? Numbers don't sound "that" bad, and could just be the dyno setup.....a different dyno could read a lot higher, so take it to the track and see what it will do

SweetS10V8

iTrader: (4)

Do you enjoy driving the car???? Who cares what a dyno says....... I can make your next dyno pull flash up to 450rwhp and you wouldnt have a clue. (about two mouse clicks and two key strokes)

I had a 6.0L with Comp LSL cam, Lingenfelter CNC LS3 heads, 1 3/4" longtubes, FAST intake, and everything else you could think of. It made 400-410rwhp, was a riot to drive, ran 11s. I never complained a bit

95ONE

iTrader: (1)

What intake manifold? Exhaust? compression? Throttle body? Fuel pump? injectors? Automatic?

Burken01

iTrader: (88)

Yes this, are you a 97 vette maybe with ls1 intake? 411 doesnt seem that bad actually from what I'm used to seeing with similar combo's.

automatic? need more info..

dtsti

iTrader: (6)

I have similar set up but with fast intake 90 and TB. I put down 469whp and 453wtq. Yours should be pretty similar.

TransAmcoupe98

iTrader: (10)

I think you are a little low on TQ. HP is probably in the right area. If your running an LS1 intake, thats an easy 15+ whp left on the table going to an LS6. Probably 35 with a nice FAST. If he was an auto, he wouldve listed a stall converter. Screw dyno numbers dude lol. Dynos are TUNING TOOLS...go to the track and make a pass, a trap speed will tell alot as well.

Burken01

iTrader: (88)

It's crazy growing up I was so hung up on HP numbers when I would read magazines...

One comes to mind was "RobZ" in his C5 with 450 est HP and he ran high 9's - low 10's. It cam down to how his car was set up and not just his power..

badazz81z28

iTrader: (6)

I wouldnt be so disappointed with 411hp at the tires! I'll tell you a secret....Many people here LIE about their dyno numbers to be "cool" or whatever it is that gets them off.

I know a guy who has a MAST motorsports 418 LS3 and puts down 500hp to the tires.
Do you really think some of these guys with 346 cubes with heads and cams are there? I don't think so.

The important thing is, how does it drive? 411hp to the wheel, I bet it freakin screams! My 78 Camaro barley had that much HP at the flywheel with no acc. and it was pretty decent.

desertLS1

iTrader: (8)

says who? you?

Similar? or yeah?

NVR_SPDS

iTrader: (39)

Need more info:

What Brand dyno?

What are ALL your intake/exhaust mods?

What trans? If Manual, what clutch, and is it holding? If auto, locked/unlocked, and what stall?

There are alot of variables here, and dyno numbers arent something to get hung up on. Weather, dyno brand and even dyno calibration/settings can raise or lower your numbers.

firstls1vette

Car is an 03, so it already has the ls6 manifold. I put 36 lb injectors, 80mm BBK throttle body, OBX long tubes, and it was dynoed on a dyno jet.

I haven't had a chance to see what it will run at the track yet, but me and a friend with his bone stock 2000 camaro ran from a roll real quick and it didn't pull much at all

firstls1vette

And it's a manual. Witha stock clutch, so who knows how well it was holding up on the dyno considering I tore it up today

mvvette97

iTrader: (18)

maybe you need a better tuner. If he has it set on the rich side it will lose power. I'm betting it's more the tune than anything else..

baxsom

iTrader: (6)

he is right about the headers, the obx have smaller primaries than others. over on the corvette forum there is a comparison of obx compared to others and they have the smallest primaries of the LS1 corvette headers.

Phil'sC5vette

iTrader: (4)

Dyno numbers can be all over the place depending on who's dyno your use and who's the operator of the dyno. You can go back the next day, and it will be differant. Ive tuned the heck out of my car over the years, and I know its RWHP range will be between
440 RWHP to 460 RWHP depending on the dyno that's a big spread. Its
407-415 RWHP on a mustang to throw another curve into the dyno dreams.

Troy5061

iTrader: (19)

Take it to the track, your mph is a better way to tell if its running strong or not.

BoostedSS

If you ran your buddies stock camaro and you didn' obliterate him, there's something wrong. You should be around 120+ mph trap speeds with that power in a vette. The power isnt whats worrying me it's the race with the camaro. I've seen many times people seeing 500 plus rwhp numbers on happy dynos only to trap like 122 lol. Shops skew dynos to keep you comming back to theirs, and make you feel bumbed out and dissapointed when you go to another one. Not all shops do this, but alot do.
Also, shops who can't tune worth a crap will skew numbers to make it look like they're good. A setup is nothing without a good tuner. Maybe try another tuner.

IRONFIST

Those aren't bad numbers at all.. That's nearly 500 fly wheel horses car with pretty simple mods.