I've read on here that quench should be between .35-.45. In the Edelbrock installation instructions, piston to head should be a minimum of .50 it says nothing about max - no range. What should I shoot for?
Thanx Ed
Printable View
I've read on here that quench should be between .35-.45. In the Edelbrock installation instructions, piston to head should be a minimum of .50 it says nothing about max - no range. What should I shoot for?
Thanx Ed
Quote:
Originally Posted by DennyW
Denny's advice is dead on. Min. .035", .040" max. for higher CR engines running pump gas.
I just find it odd that E-Brock is saying a min .050
My decimal point is out of place in the first post
My guess is they are protecting THERE intrests in your engine. They have no idea if there stuff is going on a new or a 100,000 mi engine.
Great reading!!!!!! Thanks for the post, Denny!!!!!!
I built one engine which ended up with only .033 clearance and if we buzzed the engine to 7500 rpm, when we got to the pits, the engine was knocking. We thought we had stretched a rod bolt. We were so dissapointed. We went and watched the races and then after 20 minutes came back to hear it but the noise was gone, so we continued racing and kept the revs to 6500 and all was well. So obviously the rods had stretched but after cooling down, shortened up again. Wild
This year we will be taking it apart and installing thicker head gaskets.
Quote:
Originally Posted by TyphoonZR
I've had one do it. Makes pretty little indentions on the heads but didn't hurt anything. Quench was about 30.
In our case, we believe it caused our heads gaskets to blow. Our machinist decked the block plus .06 and we had told him to zero deck it. I caught it during assembly but he thought a .039 gasket would handle it.Quote:
Originally Posted by camaro_fever68
Nice tree Denny.:)Quote:
Originally Posted by DennyW
Ok, but sorry. Erik, it's all good with me if you like Denny's tree, just don't expect me to chim IN with you.Quote:
Originally Posted by erik erikson
I'm not saying that I abhor his tree, but, it's just not for me.:LOL:
Denny Thanks for the answer, Much better than the one that edelbrock sent
"There is no maximum, but too much clearance means that there is no quench, which means no power. Anything tighter than this, or the head gasket thickness, there is potential for piston to head contact depending on the connecting rod or rpm. Thanks." Me thinks the best way to cover your butt is to not completely answer the question.
If you want a maximum number, I believe it is .080, and especially when using the lighter rods which use aluminum.
Well happy Hanukkah then.:LOL:Quote:
Originally Posted by TyphoonZR
You are talking about something that has way to many variables.Quote:
Originally Posted by 53 Willys
If I build a stock type engine I just make sure you have a min.of .040 and call it good.
On drag race engines you can get by with .030 with good steel rods for good alum. rods you would need at least double that and maybe a little more depending on rpm's.
On a IMCA mod engine we try and shoot for .050 because even with good 4340 h-beam they will grow some.
Like I said it really is an open ended question.
Stop it Denny, you are making me hungry.Quote:
Originally Posted by DennyW
Now where did I put my lunch?
Where do you come up with this?:HMMM: But you are right!:LOL: Actually I smoked a Salmon just yesterday,... damn, they are hard to light.Quote:
Originally Posted by DennyW
I also baked some Ling Cod for lunch. I marinated it in Corriander and lemon, yummy!Quote:
Originally Posted by erik erikson
Denny- You did a Much better job than Edelbrock- They are just covering their butt , But you are giving answers -
Again Thank You, Ed