Thread: e85 swap questions

Originally Posted by 04lss

Thats my plan, maybe headers, and then work on my handling (swaybars etc) until i get my taxes back and go turbo .
there's only one e85 station here close to my house, but the owner is running it in his car

Handling?! What's that?

I'm really looking forward to the octane gains. All I can get here is 91. Unless I want to pay $10/gallon for 110. Even with my listed mods, I'm still seeing 2°-3° of knock near 5k rpm on a stock pulley.

Stupid CAN gas!

stock pulley and you still have knock on headers? You need to look elsewhere for your knock issue

If you use 42.5# injectors you dont need a tune as they are 30% larger and e85 requires around a 30% adjustment. Any other injector type you will need a tune for e85. If its possible I still recommend getting an in car tune from a local tuner

Originally Posted by 04lss

what sort of pulley should i be able to run?
Theres a local place that will do initial dyno tune for 500, and subsequent tunes for 100$ probably hit them up when i go turbo.

Which ever one doesn't KR.

Originally Posted by 04lss

is it at shift?

I don't think so. I think it's all heat related. When I do a WOT run before the engine is fully warmed up, I see 0° throughout the RPM range. As soon as she gets hot, I see blips at the upper RPM range. Not much though. Before CAI and headers, I would see 4°+ degrees under at 2500 RPM during a hill climb (moderate load). IAT's were at or near 130°. It get's hot as balls here. I think if I had 93 vs 91 that couple degrees of knock would go away.

Go richer as temp gets higher... or there is a table that adjusts fueling based on WoT Time

Originally Posted by BrandonHall10

I don't think so. I think it's all heat related. When I do a WOT run before the engine is fully warmed up, I see 0° throughout the RPM range. As soon as she gets hot, I see blips at the upper RPM range. Not much though. Before CAI and headers, I would see 4°+ degrees under at 2500 RPM during a hill climb (moderate load). IAT's were at or near 130°. It get's hot as balls here. I think if I had 93 vs 91 that couple degrees of knock would go away.

I suppose I am tuned so my timing is adjusted to kill knock, but I had no knock on hot days on a 3.8 pulley gen 3 top swap, no headers or anything. (usually you have to run slightly larger pulleys on top swap because of the higher compression. ) I think i'm only running 14* of timing tho

Originally Posted by adecker

Go richer as temp gets higher... or there is a table that adjusts fueling based on WoT Time

Originally Posted by SnowTh1ef

I suppose I am tuned so my timing is adjusted to kill knock, but I had no knock on hot days on a 3.8 pulley gen 3 top swap, no headers or anything. (usually you have to run slightly larger pulleys on top swap because of the higher compression. ) I think i'm only running 14* of timing tho

I'm on a stock tune. A tuner is high on my want list.

There is your problem....

meh 42.5ers and e85 will kill his knock real good if that is his only issue.

Winter's coming so I'm curious to see how it reacts to some "cold" air. Cold being mid 50's.

lol... Thats cute... cold..50* haha try -20 here...

AAALLLLLLLL the dense cold air up in the midwest haha

Originally Posted by adecker

lol... Thats cute... cold..50* haha try -20 here...

Nope! We moved away from that. I miss the change in the seasons, but not the cold.

Originally Posted by SnowTh1ef

AAALLLLLLLL the dense cold air up in the midwest haha

And the rust! HAHA!

Originally Posted by BrandonHall10

And the rust! HAHA!

Yeah.... lets not talk about how much falls off the bonneville every time i lift it up.