Quench vs. Compression (Importance)
Thread Starter
Melting Slicks
Joined: Sep 2004
Posts: 2,412
Likes: 3
Quench vs. Compression (Importance)
I just got off the phone with AFR and the tech there told me to stick with my 9.4:1 compression for the supercharger. He said that I would have more detonation problems running a .093 head gasket at 8.5:1 than if I stuck with my .041 head gasket at 9.4:1. He said that having proper quench was more important than having the proper compression ratio to avoid detonation. Is this true? What do you guys think?
Now I'm thinking that maybe I should keep my compression where it is and buy one of those methanol injection kits to run with this blower.
This is a repost but it wasn't getting attention so I figured I should start another thread.
Now I'm thinking that maybe I should keep my compression where it is and buy one of those methanol injection kits to run with this blower.
This is a repost but it wasn't getting attention so I figured I should start another thread.
Racer
Joined: Mar 2006
Posts: 276
Likes: 1
From: Pistoia PT (ITALY)
The quench should be as tight as possible...... taking in consideration the piston safety!
With good forged rods, you can have a true 0 deck piston and no less that 0.030" gasket !
The turbolence introduced by good quench can help a lot for detonation..... the flame propagation speed is the trick!!!
With good forged rods, you can have a true 0 deck piston and no less that 0.030" gasket !
The turbolence introduced by good quench can help a lot for detonation..... the flame propagation speed is the trick!!!
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
I believe too much quench clearance is implied here.
Just so happens that you can buy .039" thick Fel-Pro's. Put the piston at 0.000" with that and you're golden. When quench is about .060" or more, you're not only going to have a less efficient burn and be inviting detonation problems with compressions approaching the limits of the octane being used, but you'll also have a dirtier (emissions) engine.
