wmcfa

i have a t-rex cam but now i am rethinking it. Is there a better more powerfull cam I can run in an auto to get me 430 plus rwhp. I have a nice set of heads flowing 314cfm's at .550 and 310 at .600 on a 3.9 inch bore. I will have 1 7/8 headers and all the bolt ons. Does anyone know a better cam i will have an auto with a 3400 stall?

teke184

iTrader: (5)

define "better"

more power down low?
more power up high?
more torque?
broader power band?
more average power?
more street friendly?

just saying "better" doesn't really help.

there ARE bigger cams, but that doesn't mean they are better. depending on the heads, you may be limited with PTV issues.

dankl

iTrader: (1)

The T-Rex v.2, if that is what you have, is a huge cam already. Is this for all out drag racing or a combination of street/strip. More information.

wmcfa

I have been told that the t-rex cam does not have superior gains with aftermarket heads, and i hear that with my 3400 stall it will possibly fall on its face being not enough stall. I dont have enough money for a new stall but could possibly budget in a new cam. I am looking for an awesome street and strip cam to pull like an sob. The t-rex cam puts down 420-450 with heads through an auto is there a cam that could do more through an auto and run great with a 3400 stall?

O.K so here is what i would like to do maybe not possible. I would like to run mid to low 11's at the track and be able to run strong from a pull on the highway.

dankl

iTrader: (1)

Your best bet is to have a custom ground camshaft that takes all of your mods into account. Contact Pat G or Predator-Z, or a vendor-------->

Give them as much info as you can, and what your goals are, and they can help you come up with a suitable grind. Just my opinion.

Scoggin Dickey

iTrader: (34)

The T-rex is huge. Can I think of a better cam with an auto with 3400 stall? Yes, but you won't like the fact that my suggestion would be smaller than your current cam. An automatic will likely disappoint you on the dyno numbers regardless, because unless you have a really good stall that you can lock on the dyno to get the full numbers (not recommended), you're not going to get the numbers that an M6 would put out.

Dyno numbers are a funny thing, and are a really bad goal to have in mind at all, especially with a stalled auto.

wmcfa

could my car put down 420+ with the 3400 stall and all the bolt ons with a good set of heads?

dankl

iTrader: (1)

Just go with a mid 220's or low 230's cam with close to or above .600" lift. That should work really well with your stall and gearing (assuming it is stock 2.73's, I think).

You should post what what car you have, what year, and what supporting mods. If you are pre 2001 and have the LS1 intake, that is something you NEED to look into upgrading.

dankl

iTrader: (1)

If you get on a "friendly" dyno, you can put down whatever you want. Dyno numbers are not all the same.

For example, with all the mods in my sig, my dyno sheet was not even over 420RWHP, granted my cam is MUCH more driveable than the T-REX. That is through an M6 also. My tuner's dyno is stingy though.

wmcfa

it is a 2001 z28: auto with 3400 stall 11:1 compression

t-rex camshaft hardened pushrods

1 7/8 hooker super comps with off road Y to a cutout

LS6 intake

Under drive crank pulley

ported mas and throttle body

SLP cold air intake w/ smoothe bellow

Ported heads that flow:

intake exhaust without pipe
.1500 118.4 97.9
.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

dankl

iTrader: (1)

11:1 compression? What size combustion chamber do those heads have? Also, are you using a compressed gasket? Seems like a nice compression for a stock bottom end. I'm guessing your heads are milled down to 59cc or so?

For some reason, I don't even think the T-rex cam will clear that set-up. Not sure, but I'd def. check the PTV clearance if your going to throw in a "donkey dick" cam like that.

IMO, go smaller. You can make a lot more "usuable" power with less duration and high lift.

wmcfa

i have 5.3 heads with 2.02 valves 1.57 exhaust and have been milled 20000's to bump it up to 11:1. the bottom end has diamond forged pistons so the machine shop is taking care of clearances.

dankl

iTrader: (1)

20000's=.002 ???

I'd have Pat G spec you a custom grind.