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What fuel for 408 #1616673 05/05/14 07:57 PM 05/05/14 07:57 PM
Joined: Jun 2009 Posts: 171 Indy M moparman89 OP member
moparman89 OP member M Joined: Jun 2009 Posts: 171 Indy	I'd just like to get some thoughts on what fuel you would run for this combination. 408" 10.7-1 comp RHS iron head 236/242 .600/.600 110 Holley 830 Spins 6500ish Street/strip Last edited by moparman89; 05/05/14 07:58 PM. School of Automotive Machinists Racing

Re: What fuel for 408 [Re: moparman89] #1616674 05/05/14 08:46 PM 05/05/14 08:46 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Whats your cranking pressure

Re: What fuel for 408 [Re: MR_P_BODY] #1616675 05/06/14 10:33 AM 05/06/14 10:33 AM
Joined: Jun 2009 Posts: 171 Indy M moparman89 OP member
moparman89 OP member M Joined: Jun 2009 Posts: 171 Indy	Havent tested cranking pressure yet School of Automotive Machinists Racing

Re: What fuel for 408 [Re: moparman89] #1616676 05/06/14 10:47 PM 05/06/14 10:47 PM
Joined: Oct 2009 Posts: 1,267 North, Alabama D-50 pro stock
D-50 pro stock Joined: Oct 2009 Posts: 1,267 North, Alabama	I have a 394 and it has 191-200 cranking comp. and aluminum heads and I run nothing but 93 octane. 8136538-CIMG0081.JPG (33 downloads) 1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...

Re: What fuel for 408 [Re: D-50] #1616677 05/07/14 02:48 AM 05/07/14 02:48 AM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 top fuel
viperblue72 top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	I think you will ping at that ratio with iron heads and that small of a camshaft. I think you can run pump premium and throw in a gallon or 2 of 110 with each tank.

Re: What fuel for 408 [Re: viperblue72] #1616678 05/07/14 01:55 PM 05/07/14 01:55 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	I dont know if your eng has quench as that would help. I have quench and aluminum heads and at 10.6 comp I run fine on 92 pump. Ron

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