GM847 cam
GM847 cam im planning on getting the gm847 but what else would i need (part numbers, brands..) what kind of springs? do i need lifters? pushrods? im most likely getting 1.6rr's ..whats the best bang for the buck? im working on a limited budget so i dont wat to go all out.. and im not doing any head work(porting)
thanks in advance
thanks in advance
I put one in My 97. I would recomend you get new Gm lifters depending on your miles. You will need new hardened pushrods and Valve springs. For springs I used K-motion K-800's(match these with retainers locks ect.., I didnt need to do any machining on my heads with those. You will also need to buy all the gaskets like Intake man, timing cover kit. The timing cover kit comes with everything on the front of the engine. You need to be careful with pulling the timing cover gasket because you HAVE to drop the oil pan so you dont break the gasket. The only other thing is make sure you are very clean when you have your intake pulled off.
do i have to pull the heads off to do this install?? what are the part numbers of the retainers and locks? am i gonna have to pull the engine to drop the oil pan?
thanks
thanks
You wont have to drop the motor to do the oil pan. You will need to unbolt it to get the timing cover to clear( when you get to it, you will know what I am talking about. You wont have to pull your heads either.
TECH Enthusiast
Joined: Jun 2005
Posts: 628
Likes: 0
Originally Posted by projectcam
You need to be careful with pulling the timing cover gasket because you HAVE to drop the oil pan so you dont break the gasket.
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Verdad Gallardo so all you have as far as your valvetrain is the springs and the cam itself? stock rocker arms, pushrods, etc.??
i already have longtubes so thats outta the way..
thanks
i already have longtubes so thats outta the way..
thanks
Originally Posted by coldkillinTA
what kind of push rods? what length? part number?
what kind of 1.6s? part number??
thanks
what kind of 1.6s? part number??
thanks
thanks sooo much. i hope to have a pretty badass valvetrain soon
do i have to change or re-tap the heads for the 7/16" studs or is it 7/16" where the rocker arm bolts?
thanks
do i have to change or re-tap the heads for the 7/16" studs or is it 7/16" where the rocker arm bolts?
thanks
TECH Regular
Joined: Feb 2005
Posts: 481
Likes: 0
From: Arlington TX
You'll should put down some tasty numbers with 1.6's on there but if your on a budget, you can use the stock rockers. I plan on get some 1.6's after I get a new hood. They make safety latches for a reason
I have a cam only 95 with an 847 and love it, I replaced the lifters with sealed power as they will accept a little more aggressive ramp rate than the stockers, I used comp 987 springs(should have went 918's) and CAT rockers, and the factory hardened pushrods and guideplates from Combination motorsports. The guide plates need to be specifically for an LT1 or bowties heads, SBC guide plates will not work.
No dyno yet but it runs 7.80's in the 1/8 with just minor bolt ons and 3.23 gears
No dyno yet but it runs 7.80's in the 1/8 with just minor bolt ons and 3.23 gears
Originally Posted by coldkillinTA
thanks sooo much. i hope to have a pretty badass valvetrain soon
do i have to change or re-tap the heads for the 7/16" studs or is it 7/16" where the rocker arm bolts?
thanks
do i have to change or re-tap the heads for the 7/16" studs or is it 7/16" where the rocker arm bolts?
thanks
