E85--Oxygenated Gas--Pump gas

[brad hibbard]

lets talk fuel
lets swap stories
lets discuss problems
what do YOU like?

Brad
Race-1.com

[Younggun32]

Funny you posted this. I was planning on calling you in a bit to pick your brain on an issue im having.

[brad hibbard]

fire away---sharing issues with everyone is always a good thing
If I cannot help --I am sure we can talk it through with someone here

Brad
www.race-1.com

[ZERO25]

What should the carb maintenance be from week to week? We seem to be getting a fair amount of residue!

[brad hibbard]

what fuel are you on zero?

Brad
www.race-1.com

[ZERO25]

VP Crate Horsepower

[JustAddDirt]

Brad,
Do you see any real performance differences in leaded e-85 race fuel in a drum, and tested good e-85 from the gas pumps at local gas station?

[brad hibbard]

zero25--
CHP is tuff on everything
there is no denying the power it makes but it comes with a price--
we recommend running an upper lube with that fuel (marvel mystery oil works fine)
use as directed ---more is not better
beyond that ---anytime the car will sit idle for more than a week---the fuel system should be drained and flushed with a non oxygenated fuel juiced with the same upper lube
also---replace power valves in the carb twice a year
call me with any questions

Brad
www.race-1.com

[brad hibbard]

Just add dirt,
E-85 fuel---pump VS race grade
on the dyno we have seen absolutely no difference between race grade (leaded) E85 and "GOOD" pump E85
here is the problem---I am not even going into the ethanol content discussion as I hope everyone already understands the importance of testing the content
BUT ---pump fuels are generally stored underground and anything stored underground is subject to moisture issues
If your station does not move a high volume of e85 there can easily be a moisture issue in your fuel.
it is critical to engine performance to have moisture free fuel that is at a content of 84 to 86 % ethanol
when we have this recipe we do not see any difference in dyno numbers---however we believe in track performance over dyno testing --so if you tell me the one or the other performed better on track we will analyze the situation to form a scientific explanation as to why

sorry to ramble there but there is not a clear answer to your question ---there are variables

Brad
www.race-1.com

[Smiley8119]

For a 604 I'm seeing people running 650 and 750 carburetor what's power difference or is one better than the other?

[brad hibbard]

we lived in 650 land for ever no matter what the fuel because 650's just accelerate better
BUT
recently (last year or so) for E85 we have moved to a bit larger carb for E85 because our builder (Stealth) has figured out a few things to maintain acceleration rate with a little more air to carry the engine at the end.

carb size 101----bigger carbs make power at a higher RPM---smaller carbs accelerate better but lack power on the topside

currently (for most applications) on E85 we use a 700 for 602's which is a 1.300 venturi and 730 for 604's which is a 1.345 venturi but that is Stealth---if I were using a different manufacturer I would quiz them on acceleration VS power

we still use 650's for all gas applications (1.250 venturi)

hope that helps
Brad
www.race-1.com

[fastford]

hey brad , just curious , have you done any testing with a E85 500 cfm 2brl on a 602 ?

[brad hibbard]

I have not had that opportunity----we do have a ton of 2 brl stuff on 602's but it's in an area where they mandate gas
my guess is that it would be awesome
602's love e85 and they do well on 2brl's

I wore myself out trying to improve on the adapter for gas and I believe the adapter for e85 might need some tweeks as well to get the best result

Brad
www.race-1.com

[fastford]

ok , the new factory stock class we have requires a 2 brl period , whether a built engine or a 602 ....