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View Full Version : Cam-2/110 Vs. U-4/vp


buck naked-r
09-02-2006, 06:45 PM
i tested these two fuels and heres the results
buck naked-r
10-06-2006, 08:22 AM
Originally posted by buck naked-r
i tested these two fuels and heres the results

heres a better look
Jonas
10-16-2006, 01:52 PM
Any way you can scan that one on a scanner so we can actually see it. Thanks for the info
sandmanblue
10-18-2006, 11:38 AM
this is better, but the jetting is pretty far off for a good comparison
buck naked-r
10-18-2006, 10:06 PM
Originally posted by sandmanblue
this is better, but the jetting is pretty far off for a good comparison thats not far off at all only where the dip is and both have it...........you can bet on the u-4 making more power
wppracing
10-19-2006, 07:31 AM
It looks like the U4 leaned out the rich jetting with the Cam 2.
U4 used a 182 main?
Cam 2 used ?
buck naked-r
10-22-2006, 12:19 PM
Originally posted by wppracing
It looks like the U4 leaned out the rich jetting with the Cam 2.
U4 used a 182 main?
Cam 2 used ?
cam-2 had a 190main because it was in before i blocked off the airjet.
but with the air jet blocked i think i need a 175main with cam-2
sandmanblue
10-25-2006, 04:11 PM
I don't know. It looks fat to me all across the board except for the last rise. I would think that having the ratio between 12:1 and 13:1 for the majority of your run would be too fat, right? I don't inderstand the last little flick where it shoots to 14:1 though. :ermm:

I totally agree that U4 would make more power, but until I see a good comparison where the afr is stabile for both runs, it would be hard to really tell how much gain there really is. VP says that it should be as much as 6%, which translates to about 3 hp on a 50 hp machine. You got about 1/2 of that.

Thie is actually something that I want to look into on the dyno in the near future. I would like to run pump, U4, and MR9 and see the results... Maybe in a month or so...
durdy_girl
12-31-2006, 04:10 PM
i would like to know also:
1)pump
2)pump + octane booster
3) U4

just let us know what comp the piston is also - this would be super info. I am running 12.5 to 1 and i know running straight U4 is the way to go but it is expensive, and maybe not needed.