Biggest Cam?
I found this for the 847 (could be wrong..but I think thats correct)
GM 847
234/242 I dont know the LSA for the 847.
----------
574/595 with 1.6
CC306
230/244 112 LSA
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541/576 lift with 1.6s.
GM 847
234/242 I dont know the LSA for the 847.
----------
574/595 with 1.6
CC306
230/244 112 LSA
----------
541/576 lift with 1.6s.
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
I have been running the GM 12370847 for a few years no problems. this cam is also readily available from Crane under there number 
I have ran it with 1.6 rockers intake and 1.5s Ext with the Imp. gasket
Edit: See what hapens when you drink and post
I have ran it with 1.6 rockers intake and 1.5s Ext with the Imp. gasket
Edit: See what hapens when you drink and post
Last edited by TwoFast4Lv; Oct 12, 2004 at 08:58 PM.
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Originally Posted by TwoFast4Lv
I have been running the GM 12347847 for a few years no problems. this cam is also readily available from Crane under there number
You sure about the part number? I find it listed under part number 12370847
Originally Posted by Sunsceamer
What are the best springs to run on a 847 with stock heads?
they worked good for a year though but the 1.6s are a little less stress on your valvetrain geometry.Heres the info someone was looking for earlier:
Jason Cromer: 877-726-8295 or 850-243-8826 (direct parts dept ph #)
email: gmparts@samtaylor.com
Sam Taylor Buick/Cadillac Ft. Walton Beach, FL
$209.00
* Crane Cam 109841 grind # HR-296-2S-12 IG (CAM) $209.00 from Jason
* KM# 16214681 $29.95 from Jason - 96 Corvette 5.7 L w/55 LT4 Knock Sensor
* Crane Kit #10308-1 (SPRING KIT) Includes retainers & locks.
* Crane 99893 - Springs alone.
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
We have had the BEST luck with K-Motion K-800s on high lift cams like this. The Crane kit started to valve float after only a month and the Comp springs were not happy at all.
Launching!
Joined: Jul 2003
Posts: 204
Likes: 0
From: MI
Originally Posted by Formula96
I also will be running nitrous and stock ported heads. Do yall know the exact specs for those cams (lift, duration)?
Originally Posted by Elysian
You're planning on running the GM847, ported heads, !AND! nitrous? You don't plan on doing that with the stock shortblock, do you?
On The Tree
Joined: Sep 2004
Posts: 143
Likes: 0
From: Naperville
Right now I'm running a cms 236/245 115 lsa cam I don't remember exactly but lift is somewhere around .555/.575 and I haven't run into any issues. I have also run through 2 bottles on a 150 shot without any problems. Chevyguy3 off of here ran a 200 shot on a heads cam stock shortblock. I believe he went a best of 10.55 with a 6speed, he also ran that setup for a while without any troubles.
Originally Posted by TwoFast4Lv
We have had the BEST luck with K-Motion K-800s on high lift cams like this. The Crane kit started to valve float after only a month and the Comp springs were not happy at all.
Which comp springs were you running with it? 986, 987?
Mike
Originally Posted by Bizzzatch350
You can go bigger, SAr2Ks cam was a lot bigger than an 306 or 847, these arent LS1s were thats an issue.
Remember that the MAIN issue in piston to valve is cam timing not gross lift #'s.
Steve...