Pontiac - Street No question too basic here!

          
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #11  
Old 02-16-2011, 11:41 AM
Steve C. Steve C. is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Liberty Hill, Tx. (Austin)
Posts: 10,923
Default

"I have had better ET's with tighter LSA then wider LSA's at the track."
Pontiac Dude

And Nolan Jamora from Isky Cams....

"The prevailing trend today is to use a wide lobe separation on small-tire cars. It's not uncommon to go as wide as 118 to 120 degrees to make the low-end torque more manageable. These cams still make great peak power, but the differance is where in the rpm range the power starts coming in. On the other end of the spectrum, you don't want to run a wide lobe separation in a heavy car with 14-inch-wide tires. You need the torque down low to move the car out of the hole. Generally, a 108- to- 110-degree LSA works well in street cars since they offer a good mix of low-end torque, top end power, and idle quality."

The same cam tech article has input from Chris Mays, a head engineer at Comp Cams and like Nolan one of the sharpest minds in the industry. Years ago it was Chris Mays that recommended I use a 108 lobe separation in my 462cid combo with my 254 at .050 solid roller in conjunction with my 3700+ lb car with 10-inch tires. At the time I contacted John Partridge at Bullet Racing Cams, he also stated the 108 lobe separation would be fine.

__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/

Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
 


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

Forum Jump


All times are GMT -4. The time now is 12:24 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017