Hello everyone. My car has been upgraded with bolt ons, not rebuilt. Puts down low to mid 600' to the wheels.
A) What is the approx power increase by switching to e85 (injectors, tune, pump, etc)?

B) Can the engine take it?

Thank you

 

I assume by bolt ons you include larger turbos, otherwise your horsepower makes no sense. E85 will push large VTGs beyond what the stock engine can handle if you let them. Restricted, you can get to 700whp or wherever your tuner deems safe for the engine by adding e85 + injectors.

So ~75whp or so. Built engine would open up another ~100 by pushing the boost pressure up more.
No need for new fuel pumps at this level. 1000 or 1300 cc injectors will do fine and won't max stock pumps.

 

You are correct!
Thanks so much, it appears to be a "lower cost" proposition as in my case the tune would be free.
Any idea what injectors cost?

 

1000cc are like 800 or so, I think 1300s are more like 1400. Injector Dynamics, other brands might be less but I wouldn't use them. I don't think you'll need the 1300cc unless you for sure will be building your engine. 1000s won't be maxed out before the rods are.

 

Thank you

 

Chkmgnt59 and rix have some pretty sweet stock motor builds running E85 if you want to look at their threads.

Chkmgnts build was a "full bolt-on" setup and rix was originally more of a "budget" setup although he has started down the slope as well lately.

You can get a good idea of what E85 can do...it is impressive!

 

Besides an appropriate fuel system, the big problem you're actually gonna run into is generating too much TQ for stock rods. You can "offset" this by using Alpha30-ish turbos, and get a healthy amount of HP while keeping the TQ down.

 

8-10% more hp over the same hardware setup on 93 pump if the car doesnt hit any limit from - fueling, rods, etc

I would say a FBO E85 car with upgraded VTGs will run safely on the stock engine

 

Fadi - you have to limit boost to save the rods. I have every bolt on on e85 - and we had to limit to 22psi as I already was hitting 738wtq. Champion ran 28psi on a built engine with their VTGs and hit 800whp, 100 more than I was able to get to. All about the tq and the rod limitations.

 

Bigger turbos will deliver TQ later and this is true also for the upgraded VTGs

Finally its all in the tuning as you say...do it right and the engine will be ok, even you have to limit TQ a bit

A friend of mine is running 1.8bar falling to 1.5bar with 68mm VTGs on pump+meth for 1 year with no problems... pushing even crazy 200+mph runs sometimes

 

Yea I have the larger 67mm vtgs from proto, their response is very similar to champions 68s
And you can tune around rods by limiting tq down low and holding it up top. I wonder how your friend is hitting 1.8 bar and limiting tq. I assume via retarded timing, but interesting data point none the less.