wmcfa

I have an ls1 engine in the shop being rebuilt for a weekend driver. I have the T-rex cam with 5.3 heads ported with flow numbers as follows below. Can someone give me an idea what ot expect at the rear wheels with 1 7/8 hooker super comp headers off road y-pipe to a cutout with 11.1 compression. i will have the prted mass and throttle body smoothe bellow, ls6 intake and eventually a pulley. Just looking to see what people have with this cam and a head package. With an automatic and a yank 3400 custom stall. With a good tune.

These were flow tested on a 3.9 bore with no pipe:

intake exhaust


.0500 44.5 45.5
.1000 84.2 74.9
.2000 148.9 115.4
.2500 183.4 136.0
.3000 210.5 153.0
.3500 237.6 163.2
.4000 263.5 174.3
.4500 283.4 189.4
.5000 300.5 203.5
.5500 314.5 214.4
.6000 310.1 223.1
.6500 231.8

5_02ls1

iTrader: (20)

looks like a stout engine....m6 could see 450+ a4 430ish

5_02ls1

iTrader: (20)

id rethink that stall id look into a 4000

wmcfa

thanks. the only thing is i already have it and no money in the budget for a new one. will it still work o.k.?

5_02ls1

iTrader: (20)

thing is that cam loves upper rpms...the short runners will help alot and the compression....what gear do you have??

wmcfa

i have not decided yet i am thinking 4:10 or 3:73's what is your take?

Daryn

iTrader: (19)

id go with no less than 4.10's 4.30's would be even better. if u dont give that cam what it wants you will be gettin ur @$$ hnded to you by dudes runnin more mild setups

johnster

iTrader: (27)

4.10 with tha trex and hes rite at least a 4000 stall

wmcfa

will the 4:10 rear give me a chance from a pull on the highway?

Kurtomac

iTrader: (5)

342's or 373's gears and a big stall otherwise you car will completely suck ***** on the highway...It'll be fine....the stall will put it up in the RPM range it likes....no reasons for 410s in an auto

wmcfa

u think 373's and 3400 stall will be o.k.? Is there a better cam i could run that can produce the same if not more heads and cam power and more friendly than the t-rex? I would like to see 450 at the wheels.

Kurtomac

iTrader: (5)

it'll be fine....not optimal but will get the job done until you get a bigger stall. Is the stall already in the car...if not..sell and and get a different one so you only have to do the job once....as far as 373s goes....i have some auto friends who went with 373s....then changed back to 342's and actually 60ft'd better (who would have thought)...but even with 342 and get a optimal stall you'll be happy....what are you looking to do 1.4 60fts? or make it nice and driveable....my buddy had a 388rwhp 00SS auto 323 gears 3600 stall felf very nice....not too loose and cut 1.6 60fts on nittos like that and with the coverter locked on the highway RPMs were nice...not too extreme as they would be with 410s and retained gas mileage
you mention a "better cam" better can be thrown around way too many ways....better for you, better for the strip, better for highway rolls...all depends on what you want to do with the car....that cam will not act like stock though

wmcfa

the stall is in the car already. I would like to run 1.8 or better 60ft times and hopefully run low 11's. I have a 2001 auto z28 with factory gears is there a way to see what gears it came with?

Kurtomac

iTrader: (5)

do you have your window sticker? it'll say it...otherwise the codes on the door will tell you....search for what numbers mean what or ask the auto guys