Click Here -> Please Consider Making a PayPal Contribution to the FordSix Forum!
2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40,
mustang6, WorldChampGramp, justintendo, BigBlue94, ags290, motorsickle1130, Rooster, ousooner919, ethanperry
rzcrisis, DoctorC, jamyers, Motorboy, fastpat, Silverback280, chad


<<< New Site Update >>>

2100s and E85

Moderator: Mod Squad

User avatar
GPGoverMPG
Registered User
Posts: 245
Joined: Sun Apr 02, 2017 11:59 am
Location: South central texas

2100s and E85

Post #1 by GPGoverMPG » Sat Jun 22, 2019 8:13 am

So I'm building my new motor and trying to pay attention to every detail and ask the right questions. I'm sure it will run great on 93 octane pump gas. I find that as slow as my progress is that I have time to think and this may be a bad thing. Would E85 improve performance any? What will it do to the carbs and my '78 fuel system and the 2100 carbs I plan on running. If there is enough performance to be gained I would perform the necessary changes. I know I would need to increase jet sizes a bunch and play with timing but I think it would be safer if I decided to run say a 50 shot of nitros. Thanks again
71 F350 4x4 Super Duty 7.3 IDI
72 F250 4x4 4speed 300 I6
72 F100 2x 428 Tri Power
2014 SHO

pmuller9
Registered User
Posts: 3373
Joined: Tue Aug 06, 2013 12:33 am
Location: Columbus, Indiana

Re: 2100s and E85

Post #2 by pmuller9 » Sat Jun 22, 2019 12:18 pm

E85 can increase power because it cools and condenses the air/fuel mixture.
It also increase power by allowing compression ratios beyond what pump gas will tolerate but that requires a build specific to E85 and is no longer pump gas compatible.

It can also be used to cure a pump gas borderline engine which is what you are looking at here.

User avatar
GPGoverMPG
Registered User
Posts: 245
Joined: Sun Apr 02, 2017 11:59 am
Location: South central texas

Re: 2100s and E85

Post #3 by GPGoverMPG » Sun Jun 23, 2019 8:08 am

The current engine in the truck runs a little hotter than I would like. I was thinking E85 may help. I was also thinking with a .050 bore and the performance improvements my new engine is going to be generating more heat. I've checked and rechecked my current cooling system and it's all good. The biggest change to my engines running temp came when I installed new rod bearings so I'm sure the condition of my mains is bad as well. I'll be running dual remote filters and an engine oil cooler. I don't think I'll need the E85 but if the performance gains are enough I would consider going through the pain associated with it. And your right that my finial compression ratio is maybe a tad higher than optimal but I won't know that until it's running and spent some time on a chassis dyno. Thanks
71 F350 4x4 Super Duty 7.3 IDI
72 F250 4x4 4speed 300 I6
72 F100 2x 428 Tri Power
2014 SHO

pmuller9
Registered User
Posts: 3373
Joined: Tue Aug 06, 2013 12:33 am
Location: Columbus, Indiana

Re: 2100s and E85

Post #4 by pmuller9 » Sun Jun 23, 2019 10:42 am

I don't expect that you will have any problems with 93 octane gas.
It would also help if you used a cold air intake system.

If you change a gas engine to E85 the fuel mileage goes down.
It you build an engine specifically for E85 with 11:1 compression you gain back some of the fuel mileage but the engine torque increases dramatically.

themotorsickledoc
New Member
Posts: 3
Joined: Mon Dec 03, 2018 4:56 pm

Re: 2100s and E85

Post #5 by themotorsickledoc » Mon Jul 01, 2019 7:39 am

If you choose to run E85, rebuilding the 2100 with Viton components will be necessary. Be aware that an engine in stock form will not perform as well on E85 as one properly modified for the fuel. Proper compression and port flow along with timing are critical. You might find some information still posted on the internet by doing a search for ALKYHAWG performance package, DEAD HEAD or E85 harley. Sometimes using my name, Tony M. Dabbs, in a search will show some E85 information.

User avatar
GPGoverMPG
Registered User
Posts: 245
Joined: Sun Apr 02, 2017 11:59 am
Location: South central texas

Re: 2100s and E85

Post #6 by GPGoverMPG » Tue Jul 02, 2019 8:14 am

Kind of what I was wondering. Didn't know if the passages in the carb's were big enough to move the fuel required by E85. E85 is available here and it may be fun to build a motor just for it. I now have three complete 300's to mess with.
71 F350 4x4 Super Duty 7.3 IDI
72 F250 4x4 4speed 300 I6
72 F100 2x 428 Tri Power
2014 SHO

jason832
Registered User
Posts: 121
Joined: Mon Mar 06, 2017 9:03 am

Re: 2100s and E85

Post #7 by jason832 » Tue Jul 02, 2019 10:12 am

E85 has an octane around 108. Carbs can be bought that are designed to run e85 out of the box. The jetting on e85 isn't very sensitive like gas either.

Motor trends show engine masters did an A-B test of 114octane gas vs e85 on a high compression engine. Only things they changed were the fuel and carb. Both torque curves were identical except for the e85 producing a few percent more torque.

User avatar
THE FRENCHTOWN FLYER
VIP Member
Posts: 6093
Joined: Sat Nov 09, 2002 9:25 pm
Location: FRENCHTOWN

Re: 2100s and E85

Post #8 by THE FRENCHTOWN FLYER » Wed Jul 03, 2019 7:42 am

jason832 wrote:
Motor trends show engine masters did an A-B test of 114 octane gas vs e85 on a high compression engine. Only things they changed were the fuel and carb. Both torque curves were identical except for the e85 producing a few percent more torque.

I have witnessed this first hand on my buddy's dyno on a big block Chevy. He did a back-to-back test and the engine made 800-something HP on gas and then very nearly the same HP on methanol, but with 40 lb-ft more torque. After the customer left with his engine I remarked that I was surprised that he did not get any more HP from the alky run. He was not. He did say that if he had taken the time to do more runs ($$$) he could have coaxed more HP from the alcohol setup.

There is a racer at our track with a very fast supercharged alcohol dragster [4 sec @ 165 MPH in the eighth!]. He has been trying for years to get me to try alcohol in my S/P car. I think to see a big performance improvement with alcohol-based fuels - methanol, ethanol, E-85 - you need an engine with huge flow numbers to accommodate the needed volume of fuel unrestricted. That is NOT our 300! Additionally, the cost to convert my hot rod with three Holley alky carbs, bigger fuel pump and regulator, and alky friendly tank and lines would be very expensive. Just to gain a few tenths I'll pass.
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING

Who is online

Users browsing this forum: No registered users and 19 guests