Just got the ams downpipe, fuel pump, and injectors. Now waiting for the turbo to arrive . What numbers would be considered safe as far as tuning go for a stock bottom end? Psi, afr, whp, and wtq. I know most tuners tune for 11.5 afr at wot. If I ask for 11afr at wot, would that help the engine for reliability? Is 26 psi low enough to help the engine not to blow up? I do know a bit of power would be sacrificed, but I'm okay with that.

 

Let the tuner do his job and take care of those parameters. Make sure he knows your car is meant to be a reliable daily-driver. Who are you using for tuning?

 

Cobb Tuning in Plano. Turbo is the EF2.5 [QUOTE=Kracka;10619477]Let the tuner do his job and take care of those parameters. Make sure he knows your car is meant to be a reliable daily-driver. Who are you using for tuning?[/QUOTE

 

If COBB is going to tune your car, your best bet is to talk to Chris Fleming and set clear expectations. Luck of the draw, my motor popped at 405 whp / 379 ft-lb - this is risky business.

 

What he said.

There's general guidelines but no blanket rules that always apply. Change in the AFR changes what timing numbers are "safe" since the burn rate changes. So many things effect other things. Go to a tuner with a good rep and pay him for his expertise.

All I'll throw in to that is timing and high cylinder pressures are what generally kill motors. For a daily driver I'd rather take out a little timing and lose 10-15hp than have a great dyno sheet and pop my motor.

 

Sorry to hear that. What gave? Too much torque maybe?

 

You had some strange issue and I think it would have occurred if you were bone stock. Maybe not. I had well over your limit and had no issues, and Chris has well over your limit with no issues either. Has Cobb ever really figured out what the problem was? How your car been fixed and what did it dyno?

 

My wife will agree with you on that, but my car had some issues too.


Who knows, but when you double the hp, you have to be aware of the possible risk.

Undetermined. The motor is built. Here is my link:

https://www.evolutionm.net/forums/ev...ft-lb-e85.html

 

Been trying to find in the search, but couldn't find if the Injen intake work with the ef2.5. Will I need the cobb inlet? Thanks in advanced.

 

Ninja edit, you will need a 3" intake to match the turbo inlet provided.

 

Out of curiosity, if someone wanted a complete stealth appearance (CA guys for example), could the EF2.5 and EF3 retain the stock turbo inlet elbow? My measurements say yes, but I figured I'd ask the source for confirmation.

 

Great thread. I've been going back and forth between the EF2 and EF3 especially after talking with Nate at MAP. EF3 is a little "safer" according to him since torque is what kills motors - you can get more HP out of a bigger turbo without bumping up the TQ numbers like you would have to with a smaller one.

Loving your numbers though...

 

EF3 is not safer than an EF2 on the stock block. I pushed my EF2 to the limit and beyond their rating; doing that on an EF3 will window your block. The 2.5 is as large as I'd go on the stock block without having to intentionally detune your setup. If you buy something, you may as well be able to use it to it's fullest.

 

I could window a block with an EF2

Lil E85, and 35psi! Boom.

 

A bad tuner could window the block with no turbo, but I said detune, not retardtune