Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
Home
Help
Search
Calendar
Login
Register
Landracing Forum
»
Tech Information
»
EFI Questions
(Moderator:
Seldom Seen Slim
) »
advice anyone??
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: advice anyone?? (Read 2711 times)
0 Members and 1 Guest are viewing this topic.
mstrdinan
Full Member
Posts: 68
advice anyone??
«
on:
April 18, 2009, 10:22:39 PM »
we have a 300 inch chev holley 750 double pumper 12 to 1 compression
victor jr intake ... 36 degree advance
running 112 octane gasoline
getting 484 hp@8300 at sea level
jets are .078 in front...088 in rear
any ideas what to change in jet department for the salt
or anything else for that matter
engine man say he should get another 50-60 hp ...has tried a few things but all changes resulted in less hp
thanks to all
Logged
fredvance
FVANCE
Hero Member
Posts: 2297
Re: advice anyone??
«
Reply #1 on:
April 18, 2009, 11:15:00 PM »
IMHO I think you dont have enough compression for 112 octane gas, high octane gas burns slower. It would probably make more HP on pump super premium,
Logged
WORLDS FASTEST PRODUCTION MOTORCYCLE 213.470
Vance&Forstall Racing
WOS 2011 235+MPH
Engine by Knecum, Tuned by Johnny Cheese.
Sponsers Catalyst Composites, Johnny Cheese Perf, Knecum Racing Engines, Murray Headers, Carpenter Racing
Dynoroom
Global Moderator
Hero Member
Posts: 2192
Re: advice anyone??
«
Reply #2 on:
April 18, 2009, 11:34:25 PM »
Working with what you have IMO I'd leave the jetting alone. I always run lean best power on the dyno here at sea level. This makes the tuneup for five miles at altitude close when running a carb. Then I'd bump the timing because of the low compression and altitude depending on the type of cylinder heads you've got. It's hard to get compression with a small engine but it pays for your efforts at the salt. What class are you running? There is no silver bullet when running normally aspirated so what ever you've got is what you've got.
Good Luck & have fun.
Logged
Michael LeFevers
Kugel and LeFevers Pontiac Firebird
Without Data You're Just Another Guy With An Opinion!
Racing is just a series of "Problem Solving" events that allow you to spend money & make noise...
Print
Pages: [
1
]
Go Up
« previous
next »
Landracing Forum
»
Tech Information
»
EFI Questions
(Moderator:
Seldom Seen Slim
) »
advice anyone??