426 Hemi - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer 426 Hemi

Print Thread

426 Hemi #600513 02/01/10 10:31 AM 02/01/10 10:31 AM
Joined: Aug 2008 Posts: 311 New England T Tech Instructor OP enthusiast
Tech Instructor OP enthusiast T Joined: Aug 2008 Posts: 311 New England	I need some thoughts.Is 10.5 too much comp.for street engine with cast iron heads? I do not have cam selected yet.Engine will be in 65 b-body.Thanks

Re: 426 Hemi [Re: Tech Instructor] #600514 02/01/10 11:23 AM 02/01/10 11:23 AM
Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL Commando1 master
Commando1 master Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL	You should be fine with 93 octane and a not too aggressive advance. For optimum tuning, I would go 9.5 so that I could really fiddle with the timing. After all, it is a Hemi...

Re: 426 Hemi [Re: Tech Instructor] #600515 02/01/10 12:12 PM 02/01/10 12:12 PM
Joined: Dec 2006 Posts: 602 N.E.Ohio P pacifica mopar
pacifica mopar P Joined: Dec 2006 Posts: 602 N.E.Ohio	Mine with cast iron heads came in at 10.2 and detonation is a non-issue. I had to deck my block due to surface issues. I wish I would have decked my block more to up my compression to 10.5 I have only ever used 93 oct pump gas and it gets raced regularly in summer months [30-35 passes a year] 5774237-aa022(Small).jpg (89 downloads)

Re: 426 Hemi [Re: pacifica] #600516 02/01/10 02:29 PM 02/01/10 02:29 PM
Joined: Aug 2008 Posts: 311 New England T Tech Instructor OP enthusiast
Tech Instructor OP enthusiast T Joined: Aug 2008 Posts: 311 New England	Thanks for the advice.I guess I will go with them.

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1