The 847 cammed, 6" rod 355 has been sitting on the stand for over a year, waiting for heads. I've got a set of LE3 heads ordered from Lloyd.
My goal is bottom 11's with my 3300# '93 Z, on the motor and high 9's on a 200 shot of progressively controlled nitrous.
The rear suspension is all Spohn. The front is Spohn, AJE, and QA1.
I've already went 12.0 with a 1.67 60 ft. time with a stock bottom end, CC305, mildly ported heads, and stock suspension @ 3448#.
It's all running through a 9.5", 3800 stall non lock-up converter, 700R4, and 3.73's. Tires are 26"x11.5" ET Streets.
The combo SHOULD be good for low 11's. Anyone else running a similar combination?

Thanks,
Frank

 

I'de personal go with the LE3 cam too but thats me, I gained 4mph over my gm846 with a bre cam thats between the LE1-2. You should be able to hit low 11's with that combo pretty easy if everything is setup right though. I don't see the high 9's on a 200 progressive, a 266 shot to the wheels made my friend go from 11.1@121 to 10.2@135.

 

id also go with a le3 cam...3300 raceweight and le3 setup shgoulod be good for low 11 on motor...and a 200 shot should get you near high 9's...if youve seen vid of ellis's car he leaves with a le3 setup on a 200 shot and went 10.04 i think...with 3700+ raceweight...

 

Frank,
What are you planning on 60ft'ing? With the controller I can see it going mid/low 1.4x's on the juice and tweaking a high 9. On the motor it should have enough power to go mid 1.5'x without much issue, although...
I think your going to either need to pull gear out of the car or go to a taller tire for the juice, but will in return hurt your n/a times.

Honestly at that weight, hooking good, and that setup on the 26" tires it should run a 11.1-11.3 at 119-120 on the motor.

Check out Clints car, "T/A lt1"

1995 T/A RamAir, 355" LT1 ,longtubes w/trueduals,PI 4k conv. 3.55's, CC306, Lloyd Elliott Trickflows, stock rear suspension, 3,450lbs.
N/A 11.15@121mph
NX175HP 9.83@136mph
GMHTP Budget 9sec.LT1 T/A.

I'll be on a very close setup to what your running, but with 325/50/15 mt dr's like Clint does and the 3.73's. I'll be letting you know how the tranny holds up.

 

Frank, If you don't mind doing a cam swap later try the 847 first. Since you are buying LE heads he'll sell you the cam later if your not happy with the results of the 847. Just my two cents.

 

I think it will work out good with the 847....

 

Yeah Frank you should have no problem running low 11's with that combo on motor. My car did that with 3.55's in the rear so with 4.10's I woul;d say you could run 10.90's with some hnigh 1.4 60's. Now on the n2o you will have to go with a higher gear, like 3.70's, b/c with a 7k rpm limit it will be out before the end. Good luck. Clint

 

If all you lack is the cam, I'd say go for it. Nicest cam in it's RPM range out of the box I think. GM and crane put lots of time into that thing apparently.

Now if you dont have springs or anything of the sort yet, Go talk to Bret. Seems to be the man on here when it comes to customs. I bet you would get another 10-15HP out of it with a cam custom tailered to those heads.

He's gonna do mine as soon as I get more cash flow, and as soon as my heads come back from the porter. C5 Vette+434 bottom end+ down payment for house+tires for the Z/all in cash+broke, haha

 

Clint, first off, I gotta give you this... Your car is awesome! I've currently got 3.73's in the car, and the added benefit of the 4L60 (700) 3.08 first gear ratio.

Thanks,
Frank

 

I'm a little confused about people telling me to ditch the 847. I've seen many accounts of this cam running in the 11's with stock heads and bottom ends.

Thanks,
Frank

 

I agree....pretty proven camshaft.

 

oh, really?

 

It's because you can do better. A custom grind with similar specs, but with more overlap and sharper ramped lobes would yield better results. I'm sure a cam guru can pop in and give you a better explanation.

 

Frank - since the only cam guru I know of doesn't stop by in here, you can call Harold Brookshire for more info on a cam that may or may not better suit you than the 847. PM me for contact information.

 

I went from the gm846 to a custom cam by Bret, and the .050 #'s weren't that much different than the gm846, but I gained 4mph in the 1/4 with the new cam, the results speak for themselves.