Sparkplugs

[Merk2003]

Hey guys a have an all motor tune for E-85 wat sparkplugs do u recommend colder ones or factory

[fastblackmerc]

Hey guys a have an all motor tune for E-85 wat sparkplugs do u recommend colder ones or factory

Unless you have an aftermarket tune that accounts for colder heat range plugs, stay with the factory heat range.

[RF Overlord]

You're running E-85?? I didn't think the fuel system in this car would tolerate that...

[Blackened300a]

You're running E-85?? I didn't think the fuel system in this car would tolerate that...

Me neither. I thought you needed at least 65lb injectors. Plus it burns so much faster then regular gas.

[EMAS]

All of Ford's factory FFVs use 1 heat range colder than the non-FFV version of the engine.

You'll likely need larger injectors and the optimum timing curve for E85 is different than for gas. In general you can run a fair amount more timing in the light load conditions where cyl pressure is low but at high loads you may actually need less timing than a gas tune.

[SC Cheesehead]

Just curious, are you running a built motor, or is it stock?

If the latter, why are you using E-85 gas?

[EMAS]

One other important thing about E85 is what is the source of the E85 you plan to run, from the pump at your local station or racing E85 from the pump at the track or one of the canned racing E85s?

The reason I ask is because E85 is rarely actually 85% ethanol. The actual blend is adjusted seasonally and when the various blends are offered depends on your location, when the local supplier decides to make the switch depeding on the recommendations, extended weather forecast and how much E85 that particular station sells.

Your fuel tune should be set up for about 77% ethanol content so that your LTFT will stay near the middle of the range. In winter months E85 is 70% ethanol, spring and fall it's 75% and you only get full 85% with 101 octane in the summer. Timing is harder to pin down but for safest operation you should tune for 70% Ethanol and the expected ~98ish octane rating.

If you are running race E85 then it will be E85 year round and you will have problems with starting when the ambient temps drop into the 50's and below.

[Merk2003]

Hey guys yeah actualy I have a built high compression 98 cobra motor and its tuned of coarse I just wanted to know if the plug would help me out and I have a silver birch gm that's wy the cobra motor

[SC Cheesehead]

Hey guys yeah actualy I have a built high compression 98 cobra motor and its tuned of coarse I just wanted to know if the plug would help me out and I have a silver birch gm that's wy the cobra motor


Nice! NA or SC? What kinda numbers is it putting out?

[Merk2003]

I don't know yet am gonna dyne it this weekend thats wy I was asking about the plugs and it gonna be n/a and on the bottle it should move and am from Florida and E-85 here is really cheap N I know that boosted cars and hi compression make a lot more power on E-85

[Merk2003]

As of now am on a street tune and factory plugs

[DTUB]

You need to ask this question over on SVTperformance in the Distillery forum, these guys have helped me a lot.