Blk01TA

Alright guys I know the power threads have been done before but I want to see power numbers from people using the MS4 just to see if Im sitting in about the right numbers with mine. I am trying to get an idea of what else I can do or change to mine to get a little more power so add in what heads and headers and remember mine is in stock 346 block so if yours is in a bigger cu. in. block please add that in. Im making 460rwhp/406rwtq

black01_WS6

iTrader: (13)

what heads do you have on the car?
What size longtubes?
What size Intake?

Johnnystock

iTrader: (6)

Youre one of the highest MS4 I've seen, you should stop thinking about sqeezing more hp out of it...

BUT, if not, we need more info on setup..like he said ^

Blk01TA

I have the ls6 st. 1 heads, with pacesetter headers fast 90/90 tb and underdrive pulley but I am a m6 with stock 10bolt still

021less

iTrader: (28)

mine did 425 through a 12 bolt and slipping clutch. stock ls6 heads, ls6 intake, slp lts. oh yeah its m6 also

Sluggish

iTrader: (10)

I made 410rwhp with a LS6 intake, stock TB, stock UD pulley, stock heads, pacesetters. M6/ 10 bolt at the time.

Gordon0652

iTrader: (4)

To get a better idea, Name the Dyno type you were on.

LSGunZ28

iTrader: (8)

also your intake is a stock unported FAST 90? pacesetters are 1 3/4" right??

what flywheel and stock or underdrive pulley?? etc...

thats damn good #s.... Im hoping to make 20 more rwhp with a similar cam, but in a 402 and a compression ratio of 11:1...

also what rockers are you using??

allbaugh_04

iTrader: (6)

IDK i've seen ms4s in an M6 put down 410-420rwhp. With that fast 90/90 you should be at around 450rwhp if you are lucky.

If you are at sea level with cool temps, maybe it's not too hard to get 460rwhp. Kinda depends on the dyno.

Either way, good numbers.

RAZORS10

iTrader: (5)

What could I expect with the 383 stroker fast 90/90 1 3/4 long tubes and ms4 camshaft tuned by TSP. ported 241 casting heads.

Blk01TA

My car was done by Tx Spd and it was dynoed on their dynojet. Yes the fast 90 is stock as in not ported and my headers are 13/4 the only other thing I have done is the Tx Spd true duals X-pipe with bullet mufflers and the pulley is a powerbond 25% underdrive pulley, and cant forget I do have the 85 maf also.

PONTIAC SLP

iTrader: (3)

nice #s do u have the graph ?

Datzneat

iTrader: (4)

I'd say those are pretty decent numbers. Anything else you do (besides n20 & FI) will probably only net you minimal gains. Such as switching to the 92/92 or changing the headers to 1 7/8 or just a better flowing header. Hate to say it but those are almost the exact numbers I got with my ms3.

Gordon0652

iTrader: (4)

A lot!

https://ls1tech.com/forums/dynamomet...l#post10596686

Blk01TA

I do have the dyno graph I just have to find it, we just moved out of west texas and up to northeast tx so ill have to look for it but I will post it up as soon as I find it. Its okay if other cars made almost the same power with the ms3 it doesnt bother me I have seen some cars make about 15 more hp with the ms3 and good heads then what I made but every car is different and so is every dyno so what can ya do. I am just curious what numbers others are making with the ms4, bc I havent seen too many others with the ms4 in a stock 346 most of the time its in a 347,348,or383, and some even put it in the 408.

Jrp1978

iTrader: (10)

492 Hp and 479 trq!

4U2BNVS

iTrader: (2)

I have an ms4 with stage 1 prc ls6 heads a 25% underdrive pulley stock ls6 intake with a stock throttle body and 1 3/4" pacesetters with true duals and only put down 430hp and 391tq. Also that was a SD tune as my MAF sensor took a ****

Kingc8r

iTrader: (21)

My buddy made 401 Corrected through a SS4000....stock rear end, MS4 only

Detoxx03

iTrader: (14)

Those are some pretty good numbers. +1 on the graph.

Blk01TA

Alright guys I got my dyno scanned and put on the computer but I cant seem to make it small enough to get it posted on here so if you guys can help me figure it out let me know and I will gladly post it.