I was running mine and they worked perfect cracked. I wouldn't put springs on them that had 150+ seat pressure and rev it all day to 7k.Do cracks make them unuseable?
I was running mine and they worked perfect cracked. I wouldn't put springs on them that had 150+ seat pressure and rev it all day to 7k.Do cracks make them unuseable?
If were talking 360 heads, I know of none. X, J, and O were open chamber also. Now, as you know, cc's will differ slightly, but the concept of design will be the same.Are there other quench-type heads ,post 1975 say?
Fair enough as to the OP's question, but We pretty much covered that up front. That's not the way CB worded it in His post, and the OP, having little to no experience mayThe post is about 340 and 360 heads, not those 302 door stops
Nooooo, the late '80's-early '90's heads were fast-burn Heart-shaped chambers with a definite squish zone, which is why they could run stock small rollers w/ 9:1 comp.
on regular 87 octane................
Lol, noo, the topic was getting a bump in squeeze from changing heads. The OP asked if the ones He transferred did so, they did not, (unless they were mowed). Your postNo, you went off topic about heart shaped chambers as this was a discussion about 340/360 heads.
Where exactly did you state that this was only regarding the 318/302 head... Yeah thought so... It's dead wrong and sure didn't apply to the 308 head. Wrong is wrong!
360 Heads were open chamber until the magnum swap over which is exactly what I wrote in context to the discussion.
Not necessarily. But the second you say cracked head, everybody runs like the house is on fire. The Magnum head, is also prone to cracking as well, but they remain in service on running engines for hundreds of thousands of miles and driver/owner never even know’s they’re cracked.Do cracks make them unuseable?
Another good compromise in upgrading a 1:88 head is to go to the chevy 1:94 valve, if not wanting or needing a 2:02. It provides a way to get more use out of a slightly sunken 1:88 seat
So i have a 1973 Duster that was originaly a 340 4-speed. unfortunately at some point in its life the engine froze and it cracked the 340 block. now it has a 360 out of a 1980's Ram with the 73 heads on it. i'm just wondering if and what 340 heads change on the 360. does it increase compression?, does it have bigger intake valves? or something, just general questions.
im kinda new too this so yeah.
Thank you,
-Elís M
the 360 motor was put into the car around ''96 and then taken out of the car again in 2007 (i have some pictures of it witch i will include). it has a new edelbrock intake and four barrel carp (not sure what kind). but i have no idea if it has mew cam cranck or pistons allthough i suspect that it might. the guy who took it out in 07 does not remember what he did to that exact engine.If you took the 73 340 heads, cam and intake and put them on that 80's 360 block what you have done is build a 74-76 360 4 Barrel motor like was in the dusters and darts and the roadrunners and the 360 challengers and cuda.
Nice lookin' setup You've got there! Any chance a shop that might have done the machine work may have a record/invoice of what was done? It'd be great if it's got 9:1the 360 motor was put into the car around ''96 and then taken out of the car again in 2007 (i have some pictures of it witch i will include). it has a new edelbrock intake and four barrel carp (not sure what kind). but i have no idea if it has mew cam cranck or pistons allthough i suspect that it might. the guy who took it out in 07 does not remember what he did to that exact engine.
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thats the thing they don't have anything like that. Have to open the engine and try to find out since the guy who did it does not remember anything.Nice lookin' setup You've got there! Any chance a shop that might have done the machine work may have a record/invoice of what was done? It'd be great if it's got 9:1
slugs in it!!
See if someone that techs class cars for compression will check it for You or even lend You the setup to cc it together. Checking the cam should be easy for You to do, justthats the thing they don't have anything like that. Have to open the engine and try to find out since the guy who did it does not remember anything.