E85 spark plugs?

gringo76

New member
What heat range plugs you guys running for e85? Iam running the tr6 right now and truck runs good when warmed up but has hard time on cold start up. Typical build, 96 vortex heads, Steve Morris cam, 63 mm turbo, msd everything.
 

Sean Krupa

Moderator
Re: E85 spark plugs?

I ran BR7ef plugs last year with Vortec heads. Ran great the whole summer.

There's basically no way around a Cold Start on E85. The amount of volume E85 has makes it hard to start when cold.
 

gringo76

New member
Re: E85 spark plugs?

I ran BR7ef plugs last year with Vortec heads. Ran great the whole summer.

There's basically no way around a Cold Start on E85. The amount of volume E85 has makes it hard to start when cold.

ya kinda thinking same thing, just seeing if anyone else had good luck with diff plugs.
 
Re: E85 spark plugs?

Have the same combo with tr6 plugs, and it starts great. Orlando cold start is like 50F though. What afr and timing are you trying?
 

gringo76

New member
Re: E85 spark plugs?

seems I have to throw fuel at it on start ups around 10.2 to 1 and she cranks up and just let her warm up for a few minutes before I drive and then still have to drive like grandma till she gets heat in her. then all good. if I lean idle out any on cold start it has trouble and will fall on its face lean as soon as you give throttle, after motor gets heat in her all good again. iam assuming not enough gasoline to ignite while cold. cant recal timing when idling. ill have to check and see if some extra timing might help.
so you can just jump in yours from cold start and start driving normal with no issues?
 
Re: E85 spark plugs?

Yes, it drives cold just fine. I'm running old fast system, so I look at lambda and tune on the gas scale. It idles around .95 and makes power around .85. Idles with 30 degrees and power with 20 degrees.
 

gringo76

New member
Re: E85 spark plugs?

Yes, it drives cold just fine. I'm running old fast system, so I look at lambda and tune on the gas scale. It idles around .95 and makes power around .85. Idles with 30 degrees and power with 20 degrees.

ya I been keeping my eye out for a classic fast with wiring harness, much better tuning wise. my timing at idle is around 22 and I cant adjust it. got a turbo tweak chip and that adjustment is not allowed by me, I would have to send chip back in. I did find tps today was going in and out so I replaced tps and pig tail and helped throttle response a ton.
 

Eric Sy GN

Donating Member
Re: E85 spark plugs?

Sometimes cold cranking can take a little longer with E85, but it should be fine once started. I would suspect you have another issue, but a datalog might help zero in on it. If we need to change something in the tune, thats not a problem.
 

gringo76

New member
Re: E85 spark plugs?

Sometimes cold cranking can take a little longer with E85, but it should be fine once started. I would suspect you have another issue, but a datalog might help zero in on it. If we need to change something in the tune, thats not a problem.

cool deal I will datalog it tomorrow morning cold and send it to you. best way I can describe cold start is it acts like a old carbureted car with no choke, once its warm its honky dory.
of coarse the tps deal being all wacky mifgt of fixed it. ill find out tomorrow morning.
 

gringo76

New member
Re: E85 spark plugs?

cold start seems pretty good now with tps replaced. don't want to celebrate yet but ill see how she does for a while now on cold starts
 
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