gm847 guys...
Thread Starter
TECH Enthusiast
iTrader: (8)
Joined: May 2007
Posts: 605
Likes: 0
From: Statesboro, Georgia
gm847 guys... i am ordering my stuff tomorrow, and as of right now i getting an 847 and 918's. anyone else running a different spring, or have suggestions? machining doesnt matter being that the heads are going off to be ported and assembled. just wondering what opinions or experiences with different springs everyone has/had.
im running the crane 10308-1's. the 918's will be fine...but id use the PAC 918's. you will be happy with the cam...it performs well, but be prepared to rev it high. 
ive taken mine to 6800 and thats where it made peak power. 
ive taken mine to 6800 and thats where it made peak power. 847 I use the k-800 springs with titanium retainers, they work well. The behives are a really great spring though and take up alot less room on the head. My buddy has them on his le3 heads pretty amazing how a little spring can handle so much.
I love the cam and I'm probably at mid 11's now with traction with the 383 ported stock heads and in a heavy convertible. I've gotten as good as 22 mpg on the highway with just a base madz28 base tune. Never had it dyno tuned prob has 20-30 more horse in it. Selling it all to a buddy maybe he'll find out.
I'm looking to go 10's so now doing away with all of it for lloyd elliot lt4's and matching solid roller cam.
Good luck with the setup. Your going the smart way building the short block. I put everything on the stock shortblock first and got about 10,000 miles out of it cranking 7000 alot but you should be good to go.
I love the cam and I'm probably at mid 11's now with traction with the 383 ported stock heads and in a heavy convertible. I've gotten as good as 22 mpg on the highway with just a base madz28 base tune. Never had it dyno tuned prob has 20-30 more horse in it. Selling it all to a buddy maybe he'll find out.
I'm looking to go 10's so now doing away with all of it for lloyd elliot lt4's and matching solid roller cam.
Good luck with the setup. Your going the smart way building the short block. I put everything on the stock shortblock first and got about 10,000 miles out of it cranking 7000 alot but you should be good to go.
You will NEED!! to use the +.050 locks or you WILL go into coil bind. Trust me, i did my valvetrain a few times because of that. I had reg. locks on it and it was hard to turn my motor over cause the coils were going too tight. Swapped out to the +.050 locks and it turned over normal. I reved mine to 6900 with no problems so i know that combo works. With my 847 my set-up is this......
- comp cams locators
- 918 springs
- Ti 10deg. retainers
- +.050 locks
- 7.150 comp magnum pushrods
- 7/8 ARP studs
- GMPP guideplates
- 1.6 pro magnum NSA rockers
- ls7 lifters
- gm847 cam
- comp cams locators
- 918 springs
- Ti 10deg. retainers
- +.050 locks
- 7.150 comp magnum pushrods
- 7/8 ARP studs
- GMPP guideplates
- 1.6 pro magnum NSA rockers
- ls7 lifters
- gm847 cam
mine are the flat ones... heres a link bro, buy 8 of them and ure golden...
Exacte ones i have and they work great.
http://www.sdparts.com/product/14011...wTieHeads.aspx
Exacte ones i have and they work great.
http://www.sdparts.com/product/14011...wTieHeads.aspx
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
