The setup consists of:
-All forged rotating assembly w/ Eagle crank and rods/SRP pistons
-11:0-1 compression
-Home ported LT1 heads w/2.02"/1.60" valves (no flow #s)
-All bolt ons, full exhaust etc...
Will be a street driven car with mainly AutoX races and occasional trips to the drag strip.
Honestly, I don't know too much when it comes to cams and I know matching the components is what it is all about. I am also aware of the fact that my heads might become my bottleneck (this is our first experience with the head-porting), but can't afford high dollar heads at the moment. I am not really going after big HP numbers either, just a solid reliable motor.
My question to you is, is the GM 847 a good cam selection for me? In AutoX, bottom-end is kind of more important than all out high-rpm HP, and I am wondering if the GM 847 will be too peaky.... Plus, don't want to be below 14-15" of vacuum since I need every bit of the braking power that I can get. From what I am seeing, this cam has been a solid performer, but more people seem to be concerned with making X amount of HP rather than all-around driveability. Like I previously said, peak HP numbers are not a big concern for me. The car needs to be strong throughout the RPM range. Also, if you think GM 847 isn't the right cam, what would your recommandation be? (I can hear a lot of people saying "custom grind", but once again, I have exceeded my budget and found a very good deal on the GM 847). Thanks in advance for all the input.

 

I am curious about this myself... Anybody?

 

I run it in my car, but i also used it in a 383 I built for an Impala SS.

Set up really similiar to yours, eagle crank/rods, ross pistons, 11:1 final. Lt4 p/p heads and intake, full bolt on, coan 3k stall, 373s.

Full weight it went 12.8 at 110 on true street tires (2.0 60') and a suspension set up for cornering. Seeing that the SS are almost a ton heavier than the f bodies, that makes for a 119-120 trapping auto, and 11s all day.

Driveability...its GREAT. No cam surge. Does still like to rev. Think its shifting at 6700-6800. However, low end you can trash the tires pretty easily.

Vacuum- never had a gauge hooked up to it, but the brakes are as good as always. Now on my car, the brakes suck, but with 33 extra cubes you should be ok.

 

Thanks for the input. Anyone else?

 

What about the XE grinds? I have heard pretty good thing about them too? Anybody using XE grind cam with similar setup?

 

I have an XE 230/236.

Very streetable.

The duration is fine but I kind of wish I had gone with more lift.

It makes great power though.

 

I have the 847 cam setting in a box witing to go into my 383 here shortly. I have used two different XE cams and they were both great on the street , but limited on the track. I first had the 224/230 w/1.6 rockers and it would barely rev to 5700 rpm and trapped at 110 the very best. everyone who seen it agreed it needed more cam , so I switched to the 230/236. the car pulled stronger up top , just barely went over 6000 rpm, but was edged out in a 30 mph float street race by a car that traps 113 and has the same tires suspension and everything that my cars running but had an LS1 with a big cam, longtubes etc.
I will be putting the cam in this month and hpefully get some track time in shortly after.