foff667

iTrader: (2)

i would think your cam would peak later then what your dyno states...i wouldve thought closer to 6500 *shrug* but no large cams like small tight converters or street gearing...4000/3.73 combo+ is a must to really take advantage.

00Z28 Camaro

Yeah I agree , and whats with that dyno x-marks the spot

blkZ28spt

Same setup plus LS6 intake. I'll be interested to see yours as well.

Taphee6

iTrader: (2)

What lifters are you running. Did you set preload correctly. Also, I to have a 98 and KR is a pain in the butt.

Jason 98 TA

iTrader: (4)

Definately sounds like there is a problem somewhere. We typically see a 60rwhp gain from the MS3 camshaft. We recently went over 420rwhp cam only with a 90mm setup & a ms3! Did you autotap it any while tuning on it?

Jason
Texas Speed

blkZ28spt

I have no idea. It was tuned at Speed inc though. Apparently I'll have to find a way to get a log of some runs. I don't have autotap or anything like that, but hopefully somebody around here does.....

LIL SS

iTrader: (9)

I still strongly think you should

A) Lock the converter
B) Put an LS6 intake on it
C) Find out why it is falling on it's face at 6k rpm..

I bet you do those things and you will see the numbers your looking for..

Tranzor

The LS1 intake has a lot to do with lowering your numbers... MS3 is the kind of cam that likes to live well into the 6k rpm range, and your LS1 intake just plain won't support that kind of rpm. So the cam falls on its face because of the bottleneck... I bet if you switched to an LS6 (or an LSX for that matter) intake you'd see a significant jump. Maybe as much as 20-25 rwhp with a new tune to account for the intake... add a pulley, might pick up 5 rwhp more on the dyno.

If that turns out to be the case, 375 rwhp or so unlocked would not be a bad number at all...

blkZ28spt

That is exactly what I have been hoping. I dont know how long it'll be before I can afford the intake/pulley though. If I did manage to find 22 rwhp from intake/retune and 5-10rwhp from the pulley that would be 370-375 rwhp on a stock headed 98 through unlocked 3500 stall converter, and would likely run mid-high 11's with minor suspension work.

I probably won't be putting any more money into it until at least June-July though. Have a few weeks of school left that I am trying not to fail, and if they get enough people signed up I have a maymester course that's four days a week from May 16-June 10 I think it is, so I wouldn't really be able to work and make any more money until mid June.

Then again almost everyone who sees it says that something is wrong as is.

1999T/A

iTrader: (4)

Dont feel too bad man . My numbers were 347rwhp/362tq with the mods in my sig . And that is with a rebuilt engine . I do have the stock catback mated to Macs and an ORY . LS1 intake here too . We both gotta fix that , plus I gotta get a catback .

Ragtop 99

iTrader: (7)

A gain of 4.5 mph isn't bad.

The weak top end is definitely a problem for a cam of that size. If it is not choked by the intake, I'd look next at the valve springs.

blkZ28spt

That is one of the first things that comes to mind when the power drops off oddly at higher RPM, but we are talking barely over 6k rpm with PRC duals and Ti retainers. Of all the possibilities I really don't think the springs are the problem, though I obviously don't know and anything is possible.

yungn

I have this setup with a yankPT4000,stock 3.23's,stock ls1 intake,no pulley, no TB, and dynoed 380/394, I am hoping after intake ,TB and pulley it will be 400, they told me before i went to TSP to get my car dynoed it would dyno anywhere from 350-380 without the rest of those bolt-ons and that big of a stall. Your car seems to be running about the right times, those are crazy dyno numbers. I watched a automatic MSV3 car with heads/and full bolt ons only put down 387 if that makes you feel better. I went 7.7X's and stalled the yank up at 2400, Im honestly not sure what it needs to be stalled at because i have never driven a verter car and that was my first time. What were the track conditions like if you dont mind me asking?

blkZ28spt

The track conditions, based on consensus opinion among those in my club/group that went, were poor. Too much VHT apparently, among other things. I myself couldn't really tell you anything beyond that I couldn't get it to dead hook once. Came really close though, and I don't think there is a whole lot left in it as it sits.

I'm not horribly dissapointed with the times even though I was hoping to push 11's. I know it's workable to 12.1's for sure as it sits, and hopefully ~11.8 with nothing but intake and pulley. Then a torque arm, maybe LCA's, drop some more weight, 3.73's and I'd hope to be 11.5-6 cam only on a '98 with a moderate stall speed. I'd be more than happy with that.

SSPEEDY

iTrader: (4)

Hey man, I'm kind of in a similar situation but haven't run my car since I dynoed low (compared to before).

Take a few minutes and read this https://ls1tech.com/forums/showthrea...17#post2011417

Drew778

iTrader: (2)

Yes, LS-6 intake and AFR 205's, I think 3:73's and a 4400 stall would help a lot

99whitews6

iTrader: (2)

Guess I wont be able to dyno mine for a while as I ordered my LC-1 wideband a couple of days ago and they just called me back to confirm that it will be 2-3 weeks before i get it!

gollum

iTrader: (1)

This is very simple people. It looks to me like a "classic case" of being over cammed for his set up.

v8maro

iTrader: (4)

I agree with gomer, looks like knock. What springs do you have again? Make sure none of them are broken.

1999T/A

iTrader: (4)

That means Im overcammed too , with what I got . Thats a good thing though , it just means I got more mods to do to get the power out . I can live with that .