• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Hemi Timing Comparison on pump gas

SUPERSTOCKRACER

Well-Known Member
Local time
4:36 PM
Joined
Jul 18, 2008
Messages
6,372
Reaction score
1,344
Location
Oblivion
it was a change where i went from 34 degrees total timing going 10.03 @ 133.45 mph in 94 degree weather which it did not like at all.
i usually run 32 degrees timing, so same conditions just going back to same tune and running 32 degrees, my 581 hemi belvedere goes 9.80 and DA was 3445 ft.
60 foots were 1.34-1.35 with 32 degrees timing and footbraking, NO TRANSBRAKE..

ChrisBaum3IslandOctober112009.jpg
 
for got to mention, in decent air my hemi goes 9.69-9.75 @138-139. mph
my mph is down to 134.54 in bad air.
65PLYMOUTHATLEBANONVALLEY.jpg
 
The numbers speak for them selves. You must have an efficient fast burn chamber with not a lot of piston top in the way. Single plug engine? What's the CR?
 
Wow, 11.0:1 on pump gas. That's why HEMI's rule!
 
You can make many engines run 11-1 on pump gas. It's a combination of quench, compression, cam....well, the whole combination is important in doing that.
 
wonder how bad the car would run today in ny and nj, its 105 degrees here. i can hardly breathe.
 
Crap, 105 deg AND 150% humidity I bet!! That can't be good.
 
Auto Transport Service
Back
Top