piston help?
Thread Starter
|
Elder User
Joined: Feb 2015
Posts: 676
Likes: 0
From: south east kansas
piston help?
so I have a 390 it has shaved heads but I want to put aluminum heads on and the pistons are dished to accommodate the valves( may be just regular dished for all I know) , the heads aren't shaved much so would I need new pistons or would I be fine with what's in it, the heads I want are the Edelbrock complete heads 76cc , I really wouldn't know what I would need to do so any help would be nice
Hotshot
Joined: Sep 2012
Posts: 17,708
Likes: 136
From: Calgary
Go online and check with a piston manufacturer's piston specs to find out what the compression ratios are with different size chambers. EG flat top piston with 76cc chamber, dished piston with 76cc chamber. Would need to know the height of the piston above the wrist pin to confirm if you have stock pistons.
Posting Guru
Joined: Aug 2010
Posts: 1,761
Likes: 8
From: Knoxville, TN
Valve reliefs are to avoid piston/valve interference:
Dishing is typically used to tailor the compression ratio:
It's also possible to do both on the same piston:
Go online and check with a piston manufacturer's piston specs to find out what the compression ratios are with different size chambers. EG flat top piston with 76cc chamber, dished piston with 76cc chamber. Would need to know the height of the piston above the wrist pin to confirm if you have stock pistons.
Thread
Thread Starter
Forum
Replies
Last Post
Blue Rebel
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
4
Jan 31, 2015 09:16 AM
Jrock909
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
7
Mar 23, 2007 11:40 AM
