Shell 100 Octane ? Can it handle 12.34:1 compression with alloy heads ? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
General Tech Have a question that is not covered by one of the other categories? This is the forum for all other items not specifically covered in other categories.

 
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 05-31-06, 03:18 AM Thread Starter
Registered User
 
AXR88U's Avatar
 
Join Date: Sep 2003
Location: Sydney NSW
Age: 41
Posts: 37
Question Shell 100 Octane ? Can it handle 12.34:1 compression with alloy heads ?

Just used one of those online calculators and got a figure of 12.34:1 compression with the the piston-deck clearance, piston dish cc's, head gasket thickness, etc.

I think this is too much for the 98 fuels, but has anyone pushed the limits of the shell 100 octane stuff yet, would I be able to get away with retarding the timing curve down low (and maybe a bigger cam) ??

I have another pair of heads that worked out 10.58:1 and am tossing up whether to run these and run a better advance at lower rpm or use the higher comp ones (if possible) and retard it a bit ?

What are peoples thoughts ??


--------------------------------------------------

Better off with not enough traction than not enough power
AXR88U is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old 06-12-06, 10:34 AM
Registered User
 
Join Date: Jun 2006
Posts: 7
Re: Shell 100 Octane ? Can it handle 12.34:1 compression with alloy heads ?

4-5% increase in hp per 1 point of compression, so figure out if its worth the trouble to run the near 12.5:1 or the 10.5:1 I would opt for the 10.5:1 on the street with advanced timing events
sbftech.com is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > General Tech
Gear in this thread - Powered by O'Reilly Auto Parts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome