what your forgetting to factor in is the cost of e85. right now I'm running e70 winter blend which at its woorst is equal to 105 octane. 105 costs 12$ a gal then another 12$ for shipping. 24$ 5 gal minimum. e70 from the pump is 1.72 a gal and available at 4 different stations around my area.

its a win win from every angle

 

I just got my flex fuel mods running and had a terrible time with injectors. I bought black ops 1600 and couldn't get the injectors to perform the same between cylinders. I wasted alot of time. In the the end I went with the new 1650 fic injector. No idle issues what so ever. BTW the car is a 993 3.8 w 3076s

 

Just like I said in my post this is my opinion; however, to reply that I am forgetting the cost factor is probably the main reason I would not do it again. I think the gas factor is minuscule compared to what it cost to build a true high powered E 85. I will say that I went from a 1200 hp C16 which was very streetable to a very cantankerous car. The cost for around 100 hp gain? Probably $20,000. So you must ask yourself how many times will I need to use race gas? In my experience, it was probably 10 times a year? Once for Texas mile, for Supr Nats and of course Texas Invitationals. I do take it to a few Road racing events maybe two or 3 per year. The rest of the time I just need regular gas which I think averages out the price of race gas? Once again, this is just my opinion for those who might be considering E 85.
Good luck and happy New Year,
Robert

 

Thanks for replies

My main concerns are that my car for whatever reason seems to produce much more power and torque on K24s then one should expect... a good thing yes but for a supposed 700-750 bhp car on E85 it simply runs out of fuel at 5000 rpm in 35F temps or 6000 rpm in 75 F temps

So if I try say 1300 cc IDs I am already at the semi-safe 67-75% IDC%... I will research the 1600cc FIC

I am not so concerned with idling if I have 2000cc injectors as my car is a Hamptons end of the earth thrash her around no other drivers when possible type car

I will check the ID2000 and FIC1600

Thx

 

I would be curious to know if you used a lot of leaded gasolines like C16 or VP Import and then tried E85 or E70 or E98... IN THE SAME CAR


There is some interesting data which says never use E85 after a car has used any leaded fuel..

I think the chemistry/physics goes something like... use leaded gasoline... over time said lead coats cylinder heads and walls... some time later add Ethanol

Ethanol or any alcohol and lead = PROBLEMS

The lead build up serves as a downer for the alcohol so a normal E85 at say 107 octane relative becomes 100 relative octane and that added timing = danger

 

In my car no, it was thoroughly cleaned as well as the heads coming off to be cleaned. As far as others I can not answer. Power is not a problem but the time and money spent to make it a streetable car.

 

for me it was the decision to use the proefi before building any size power engine. this way i can rn any fuel i want. other than a being a bit cantankerous on a cold (below 50*) startup my car runs , idles and drives the same on e85 as it does 93 oct. i went from 490 rwhp to 650 rwhp at present and the entire build, fuel system, turbos , engine management, intakes, clutch, tuning didn't cost near 20k$

wolf hedge what are your power goals? if 800 rwhp can be had at 85% idc then your golden. if you want 4 digit power levels your going to sacrifice idle for fuel. even tim had idle issues with the huge moans he ran for a bit. its dual injectors at that level

shug you have the greatest resource at your disposal. i have never known tim to be too busy to talk porsche! we had dinner after texas mile and for almost 2 hrs the women sat bored while we talked cars. this was after a full day of him driving and breakdowns. give him a call. he will know what you need. to him this is like a world class weightlifter lifting 20 lb weights.

 

Good thread going on here. I have been slowly piecing things together, I picked up a set of FIC 1100 injectors but I have been looking at the ID1300s also. I think for my future plans ID2000s would be overkill. Also waiting on Sam's fuel kit coming out.

 

My plan for now was to run my car as is on the E85 which ranges out here from 72% (winter) to as high as a measured 88% (summer)... I am tuned for E85 so at lower E72 etc it just runs mega rich

I did do some calculations off the injector flow rates and really for a 750 bhp car running 80% IDC% on E85 it is already maxxed and needs 1300cc injectors.


So 800 awhp = 1000 bhp or so probably means the 1300 cc injectors would be maxxed at that level to > 100% IDC% for those with that set up.

The next plan was to add the 68 mm HTA billet turbos modding my K24s but the car is already at levels where we are getting near a danger zone for the rods so I guess I will add larger injectors, probably the ID2000s and tune it for E85 on them and then next winter do the rods/pins, new clutch and other assorted stuff with larger turbos.

For now 580-630 rwhp is enough and it is great to drive outside of the fueling problem... this week I will run down the E85 and switch back to the 93 octane or an E20 tune and run that until temps warm up.

The other day in 32F the car was pulling 0.05-0.08 Gs more at 75 mph in 3rd gear than it did on the same E85 tune at 75F temps.. that is a lot of extra power and torque and implies IDC% >> 100 and I can hear knock in 3rd and 4th gear above 5000 rpm

 

32 krazy My ultimate goal is a driveable 700 whp consistently on E85 or enough to go 201 mph in a 1 mile.

I am guessing from our discussions I will ask Tim to go either ID1300 or ID2000

 

before going with the id 2000 take a look at the new fic 1650. good idle running 1.6ms injector time at idle on pump. 14.5:1afr.I think its possible to get 1000 fwhp out of this injector. i will try

 

1000 whp on E85?

 

1000 on E85 is the plan, it will be close but I will find out here in the next couple of weeks. If I can't I will lower the base fuel pressure to 35 psi and add a voltage booster to the pump.i may need higher fuel pressure than 1:1 reference boost

 

ID's are an injector designed for gas and im not talking petrol, every ID we ever see has problems being eaten away by fuel, they last no time at all running race fuel either, I will only fit ASNU injectors the fuel atomisation alone knocks spots off the ID's and they go up to a 1600.

 

the FIC 1650 injector is an ANSU injector made for all fuels by Bosch