FbodyFreak

iTrader: (5)

Ok guys i have decided to go with the gm 847........ but i have no idea what pushrods to go with and what valve springs to get......... i don't wanna have to deal with coil bind an bent pushrods...... so can some of you guys help me out........ searching just leads to dead ends.........?????

FbodyFreak

iTrader: (5)

welll did morre searchin..... and found out that the comp cames 26918 beehive ovate springs are a durrect drop in.............. but still need help on pusgrod length for the cam........

-PEPE-

iTrader: (10)

Crane 99893 springs were the matched springs from Crane Technical for running 1.7 rollers so they were just fine with 1.6 rollers as well. I don't remember the length I used for my pushrods but I want to say they were the same stock length for our LT1s just Comp cromemoly, believe that's what Crane Tech spec'd me out for as well. This was 3 yrs ago, running different setup now but I'd recommend calling Crane since it's their cam anyway.

383_LT1_1295

yeah im with you...i also am going with the gm847 cam and also need to know what pushrods valve springs and rocker arms would work the best with the cam.

seawolf06

iTrader: (8)

With stock heads and block, you can still use the stock length pushrods with no problem. I might have some Comp hardened pushrods for sale soon if you're interested.

FbodyFreak

iTrader: (5)

i'm interested if he isn't............. oh and would the 1.6 roller rockers that i got with the hotcam kit should work fine with the cam right?

seawolf06

iTrader: (8)

I don't know about those rockers. I've heard they aren't good on higher lift cams and the GM847 is much harder on the valvetrain than the hotcam is. Do a search to find out. I just got Comp Pro Mags to make sure I never had to worry about them.

383_LT1_1295

okay..i will pick some hardened push rods from comp cams... and hopefully figure out what size RRs i need to get the job done.

383_LT1_1295

okay, i just gave comp cams a call...and i told them what car i had what cam i was using and he told me everything that i needed to go with it and their part numbers....man do i love tech support!!!

Cammed95Z28

I have heard that using the RR's from the hotcam kit are fine and you shouldn't have to change pushrod length unless you have had the deck of your block shaved down or your heads milled, then you would need to go shorter. Lucky for me I have a 95 and my car came with hardened pushrods I am gonna be running the LT4 hotcam 1.6rr's, beehive springs, and my stock length pushrods with the GM847 next month. I'll let you now how it works out.

-PEPE-

iTrader: (10)

didn't hear any of you mention the lifters, I'd recommend something better than stock with this cam, not sure if Comp fixed their junk CompR's yet but Crane and Crower make an 847 cam spec'd hyd lifter.

DroppedM6Z

iTrader: (5)

I'm using CC918's and Comp pushrods on my 847. If your rockers are SA then you need to go with the 918's do the will clear. Theres not many springs that will hold likw them and still clear the sides of a SA tip. I'm using new stock pump and stock injectors too. No need for that other crap unless you got a crap tune or big spray.

FbodyFreak

iTrader: (5)

well i was thinking of upgrading my fuel pump(255lph) and injectors to 36lbs..... i wanna try for 400hp.... i'm thinking about going with the CC918's.... and comp pushrods.... i think the rockers should be ok.... i eventually wanna run a 100-150shot...... so yeah....oh and lifters i'm gonna call crane cams to see what they say.......

DroppedM6Z

iTrader: (5)

I'm just repeating what i've heard from the man. Ed Wright Makes 513/580 raw rw in his LT1 on a stock pump and the A/F is perfect. He Told me to replace the stock pump when it starts to go with a new stock pump and i'm using stock 24#'s on my 355. Just tryin to save you some money. Do what you want