Yes you can add e98 to e70 to bring it up. About (that's the key word) one quart e98 to 5gals of e70 works. Remember add and test. If you add too much and get e87 even e90 no biggie. Btw for what it is worth. My sbc 400 bracket motor will run basically the same on as low as E75 as E90. Our pump e85 here in central Georgia can be as high as 90 in summer,but winter is usually dead on 75. Motor is at 13.5/1 compression. I have no signs of detonation with any of the pump blends and as I said, performance is basically the same.
Posts: 517 | Location: Going to or returning from the chipmine. | Registered: July 01, 2011
Originally posted by Wooley: Yes you can add e98 to e70 to bring it up. About (that's the key word) one quart e98 to 5gals of e70 works. Remember add and test. If you add too much and get e87 even e90 no biggie. Btw for what it is worth. My sbc 400 bracket motor will run basically the same on as low as E75 as E90. Our pump e85 here in central Georgia can be as high as 90 in summer,but winter is usually dead on 75. Motor is at 13.5/1 compression. I have no signs of detonation with any of the pump blends and as I said, performance is basically the same.
Here in the north I am being told that most are E70-E75 during the summer. I would go back and run Meth but locally that is to expensive, (my local track wants 75-100 dollar for 5 gal can). I can get about a hour away from my track at about 2 bucks a gal, but I have to buy barrels, and don't like having barrels as I live in the city limits, and I am no sure if that would be legal.
Thanks for you response Wooley.
Posts: 40 | Location: Flint, MI | Registered: October 24, 2010
Mr. Bill, if you are going to run e85 go ahead and buy the tester from quickfuel. It is a glass tube, real easy to use. That way you can test your e 85 when you get a jug home. I have e98 available a short drive away, but have to get it in 55gal drums. That is the only problem with haveing to mix my own. I usually just buy pump e85 and run it. Early September before winter blend comes in I will get 25 or 30 gallons. I don't race but a few times a year and usually use less than 50 gallons all year.
Posts: 517 | Location: Going to or returning from the chipmine. | Registered: July 01, 2011
I should have looked in my log book notes before I answered you about the mix. It takes two quarts to five gallons sometimes two and a half quarts. That's what I get going but memory.
Posts: 517 | Location: Going to or returning from the chipmine. | Registered: July 01, 2011
I have not made any changes to the carb. Run the same jets all year round, just change dial in. Like gas I am faster in spring /fall than summer. Only difference I have noticed is with e75 cold start up is easier.
Posts: 517 | Location: Going to or returning from the chipmine. | Registered: July 01, 2011
Around here the plunder pumps are usually run around mid to upper 70s the few locations that don’t use plunder pumps run low 80s. We always check ours at the pump before buying. We have a few 15 gallon plastic drums we fill and then usually transfer into five gallon jugs checking it as needed for a race. Never had to make any carb changes, just keep good records to predict the dial in.
Do any of you run straight e98? I have read that there isn't any advantage to it but with my combo a 383 sbc 9.6-1 static compression with a little weiand 144 supercharger making 10 psi of boost in a front engine dragster I am looking mostly at cooling effects it has.
tony palmieri
Posts: 19 | Location: Nebraska | Registered: April 08, 2018
Originally posted by 478c: When you run e70 in a carb that was set up for e85, do you change jetting or anything in the carb set up when your running the e70?
E70 is richer then e85 (assuming same jets) won't hurt anything running it, might be a little slower.
Joe
Without data, you’re just another guy with an opinion.
Posts: 1314 | Location: TEXAS | Registered: February 07, 2003
