Dynosty

iTrader: (27)

For what it's worth, our local gas station with E85 told us they had changed to winter blend, but we found it to be E85 when tested last week.

str8dum1

iTrader: (11)

actually, you have it backwards. A E70 tune will run lean on E85 fuel. need more volume for E85 than for E70. same as a pump gas tune will run lean on E85.

Dynosty

iTrader: (27)

^yes, E70 tune will run leaner on E85, but will have less timing. I am more concerned with timing being over advanced, and would recommend E70 tuning with a little extra fuel cushion if you needed a one-map solution for two similar but different fuels.

binder

iTrader: (8)

i am worried more about the octane value. We could calculate the difference in density and apply that percent difference to the a/f ratio to see how much that would effect the a/f ratio. So, tuned at 11.0 then a 10% reduction in fuel would theoretically yield a 12.1 a/f. Theoretically. I'm not sure the percent difference between e70 and e85 though. I'll look it up.

ah, ya, i was backwards on my statement. e85 is less dense so a stoich tune for it would become rich as a more dense fuel is used.

but ya, i would think the density between the two wouldn't be as much of a change to cause a problem as the octane change.

Hal, what instrument do you use to test the density? I assume it's a fast density test to check e85 verse e70

str8dum1

iTrader: (11)

Actually it a water displacement test. Water binds to ETOH and not gas so you measure the difference when water is added to the gas.

I use the 1st 2 methods and they both come up with same answer, but I use the .pdf method as standard since that accounts (kind of) for the fact the 50ml of water + 50ml gas doesnt equal 100ml total volume.

this
http://www.xr-underground.com/forum/...77&postcount=1

or this
http://iqlearningsystems.com/ethanol...ds/E85test.pdf

or you could just buy this
http://www.summitracing.com/parts/QFT-36-E85/

MI 35th

iTrader: (16)

LOL, yah i just bought that exact tester and tested my local station.

binder

iTrader: (8)

sweet, i might snag one of those.

After looking some things up it would cost 4.47$ per gallon to take a drum of e98 and mix it with 87 octane to make a consistent and decent e85 mixture.

I can get 110 octane for 5.99$ a gallon and at 50/50 mix of 93 and 110 i get 104.5 octane fuel for 4.75$. I lose the cooling of e85 but i use 30% less fuel so it's cheaper in the long run to run a 50/50 racegas mixture in my car all the time. lol. anyways

So, after calculating e70 verses e85. If you have a tune for e70 and you put e85 into the car it will only lean the mixture out .855 a/f. So if you tune to 11.0:1 on e70 then you will be 11.8:1 on e85 which would still be safe with the extra cooling that ethanol would add to the mixture. The timing on e85 would also be well within the safe limits because you would gain octane. So basically tuning to a rich e70 mixture and then putting e85 in the tank later wouldn't be dangerous.

str8dum1

iTrader: (11)

so you are goin to tune your idle and non boost ranges almost a point richer?

binder

iTrader: (8)

nah, just let the corrections take care of that. My concern is only in the boost areas anyways.

MI 35th

iTrader: (16)

At the request of Sasha, I wanted to come make a mid winter update to my build thread

The car for the most part runs great and still have some electrical gremlins. Dynosty is working these out as we speak.

Sasha asked a couple questions, how the kit performed in a performance environment. I have yet to have it to any HPDE in the current form or time attacks for that matter. I was able to make a local SCCA auto-x event and not having time to set the car up properly raced in the Novice category. The course was technical and fairly tight but boost was easy to come by, even if traction wasn't. Overall a very fast cone car especially in the slalom.

I will say that this kit is much more to handle than the JWT, boost is much more violent and takes a more cautious pedal to attack a corner. I am also going to seriously reconsider my suspension settings.


I am on stock radiator, and the temp of the car never budged. I can imagine on an open track things will be different so that is another upgrade to do before summer.

As for ECU, I am selling my two Haltech boxes to replace with one of the new ones that supports E85 flex fuel.

str8dum1

iTrader: (11)

no OBD2 inspection testing in ohio?

MI 35th

iTrader: (16)

No there isn't any emission anymore in OH.

Boosted Performance

iTrader: (14)

Thanks for posting Don. A couple of guys that do auto-x have asked me how the kit performs while being pushed on the track. Since you are the only one using the BP kit and doing auto-x I thought you would be able to provide some 3rd party unbiased input. That way there is user/customer feedback, and not me trying to pump up my product, although I have no doubt that it will perform flawlessly.

MI 35th

iTrader: (16)

Happy to Sasha, if i could have dialed in the suspension or been on some larger stickier tires it would have been better.

As it sits, the car is perfect for the Higher speeds of Mid-Ohio and Putnam and am looking forward to some DE's & Lapping events.

This is a the perfect mid speed / to high speed corner setup as it sits now.

I am contemplating retiring the Z as a track car and building a purpose built and going for bigger numbers on the Z.

MI 35th

iTrader: (16)

Updates all around, "New Parts on Order"

I am happy to be among the first that will be running the New Haltech ECU system w/ E85 Support.

Also on that list is a Dynosty Return Fuel System, and several other parts.

My plan is to max out my current setup for E85/ flex fuel and run that setup @ ZdayZ. Upon return home and back to Louisville (the new home of Dynosty) I will disassemble the turbo setup in favor of Precisions 7675 setup with ID2000s & a new Tilton Clutch.

This should finish the car out as a great highway GT car with insane pull. A bunch of my setup needs to be changed including tires and suspension but I have a good starting point. With the Help of Sasha I hope to be in the 1000BHP range on stock sleeves & E85.