Is this a good idea on a stock car?

 

it is a decent idea, as long as it does not rattle.

Ryan

 

So i should do it? and just look for knock?

 

this is best done on a dyno to make sure that you are commanding the best afr. you will also need a wideband so you know what your actual afr is.

but yes its a good idea

 

I'm more of a fan of a moving fuel curve. I believe a leaner fuel curve down low isn't as good for peak torque. I set mine to be slightly rich down low (12.0:1), rising to 12.2:1 for peak torque, rising further to 12.8:1~13.0:1 for peak hp and then richening back to 12.6:1 for redline. Combine this with a slight increase in spark over stock (~2 degrees) and you can gain up to 2 tenths and 2 mph in the quarter.

 

Thanks for the comments.

 

yeah thats how i set mine up...i use the 2d graph to setup the table...make it look like a mirror of a projected tq curve.

 

Hmmmmmmm...on a stock car, I'd be weary. As long as you use a wideband to verify the AFR, go for it. Otherwise, you may not get what you command.

 

out of curiousity which thread is that from? (I don't recall saying that, unless it was a real long time ago?)

Definetly need a wideband to properly dial it in (setting to 1.15 will only yield ~ 12.7 AFR if your VE table is dialed in correctly)

Also I've found (as others have stated) that a flat PE isn't always ideal... often you can make more power under the curve by changing the AFR between richer and leaner at peak torque and hp ... 12.7:1 or so seems ideal for a max HP point.

 

I´m sorry Horist, I´ve checked who wrote it and it was Redhardsupra... My mistake

He wrote it on his blog http://redhardsupra.blogspot.com/ halfway down.