E85Forum.com

Eric68 · Joined: 01 Nov 2007 Posts: 331

Well, let us know how it turns out with the summer blend Joe.

Sometimes there can be a big difference between true summer blend and winter blend. Here is how you can handle the majority of the variation in seasonal E85 blends. E85 has a fairly wide "max power rich" window and you can us ethat to your advantage.

I set my carbs up so they are on the rich side of the "max power rich" window with spring/fall E85 and on the lean side of the "max power rich" window for summer blend E85. This calibration leaves very little variance when bracket racing and keeps the tuning for different seasonal blends to a minimum. If you actually have true "winter blend" E85 I would be surprised, in your area the blend usually varies from about E76 to E83 to E76 spring-to-summer-to-fall.

That is something I have learned over my last 4 seasons of driving and racing on pump E85. I hope you understand that I don't give out specifics on how to do the tuneup on the internet, especially for a competitor's carb, but you should get the idea.

And not trying to rub it in, but for any other peeps out there watching, this type of stuff is the difference between a gas carb builder that does E85 and an E85 carb builder that lives and breathes only E85.
_________________
E85 racer and E85 carb builder
www.horsepowerinnovations.com

E85 powered 68 Camaro street car
Best ET on motor 9.96 @ 133 MPH, 5.92 on N2O in the 1/8th

joeq66 · Joined: 13 Jan 2010 Posts: 16 Location: lafayette,IN

Erik thanks for responding.As far as what is the actual blend im not 100% sure.I know they call it winter blend and it has e70 on the pump but I have not personally tested it.Im going to buy a test kit so I can be alittle more up on the blends around my area.I talked to the lady a few days ago and she looked at the paperwork for the new shipment and said that it was indeed the summer blend.I will test it and then tune as you suggested.Something is just not right with the way my car is acting and I can only hope that it will be as easy as changing fuels and jets to clear it up.Its a very lazy pig right now.With my work schedule I wont make it back to the track until may 16th so I will do some testing on the street just to get a/f in the neighborhood..thanks again for the posting..

Alcohol · Joined: 17 Apr 2007 Posts: 634 Location: Central Wisconsin

You cannot go by the E70 sticker on the pump. This is a federal sticker to inform you that there is AT LEAST 70% ethanol in the pump. This allows the same sticker to be used year-round.