OKay I have been driving myself nuts searching and searching for a decision of which cam I want to go with. Basically it has been between the 847 and the 306 cam. I am starting to lean more towards the 306 since I am A4 and wont get the revs out for the 847. Also i am kinda worried about running the 847 since the lift is high even tho many do run it. I basically want a little more.

I am running 12.9@107mph (n2o tune for 100 shot)
312WHP@5650RPM 311WTQ (n2o tune for 100 shot and shifting at 5650rpm)
Both done on a N2O tune....havent had the time to retune for N/A

Also I do plan on running a 100 Shot next season also.

Looking to go 12.50s with a good tune.

I am currently running.

355ci LT1
Speed pro pistons
Ported heads
Ported intake
52mm tb
30# injectors
LT4 Hotcam kit
1.6rrs
Hooker 2055 headers (1 5/8s)
Full 3 inch exhaust
NO Cats
255lph pump
Areomotive adjustable FPR
Corvette mass air(gutted)
K&N
3000 STALL
3.42 gears (awaiting the break for a 12 bolt)

 

These are you specs and you are only making 312 RWHP 311RWTQ, that cant be correct.
I would expect you to be around 350 RWHP at a minimum. Somethings wrong here.

 

Well it was with a N2O tune for a 100 shot. So i few degrees of timming was pulled. ALSO It was shifting at 5650 WAY too low.

I will add this into my original post so everyone knows.

Jay

 

Is this in a third gen??? If not then why the hooker 2055? Was it a Mustang Dyno? As far as the rpm ranges go both cams will peak at a similar rpm range. So go cc306 or the GM847, does not matter. Me personally I would go GM847.

 

306 is more nitrous friendly if i remember correctly

if i were you i'd get the 306.... it would suit your wants/needs more than the 847.

 

Have you considered a custom cam?

 

sorry yes it is a 87 iroc...my sig isnt poping up i guess.

I hear goods and bads of both cams. But if the CC306 is n20 friendly i may go that route.

Jay

 

every cam is a nitrous cam unless you're looking at 250+ shots

nitrous is not a prejudice person, it loves all things equally.

go with the cam that makes more power n/a, so what if the other one gains a **** hair more power from the same jet than the better "n/a cam" if the "n/a cam" makes more overall power.

honestly between the two I'd say gm847, but truthfully I'd say go custom grind, no point in leaving anything on the table and the grinder can make it to fit your application/powerband/etc

 

I'd have to agree with everything said here. And I really like the first two lines.

 

Add a signature.... it isn't "poping" up because you have not entered one.

Why would you tune it for nitrous? Why not tune it for max NA HP, then use external means to pull the required timing, providing optimum performance all the time.

 

Injuneer makes a good point. Look into getting the Mallory 685 box which will allow you to run max timing for NA and then pull timing only when you are spraying. Plus it has a window switch built into it which is also good for nitrous.

 

It was tuned in the car that the motor was previously in. I havent got around to getting it retunned. I plan on tunning for N/A and N2O and just dump the file in when needed.

Jay

 

Just get the 685 box. Makes life (nitrous) a whole lot easier. Why keep switching back and forth with the tune, when you can just flip the switch and have the correct nitrous tune?

 

DEF get the 685. I love mine.

 

I was having fun adding in what would be in that ****