X E Ryder

Hey folks,

So I had a lengthy talk with Quinn of Kyle's in Modesto California (http://www.kyles4x4.com/) and he had some revealing things to say about pepping up the 4.0L motor.

Considering he has built a 650hp blown stroker that ran a 10.80ET 1/4 mile @ 155mph, and the family business has done a ton with this motor, I thought he'd be a good source of info.

I was planning on doing an AFE cold air intake, borla exhaust and replacing the cat and headpipe. My usage requires lots of torque and grunt - not so much high rpm whine.

He has steered me away form a header which makes sense - the longer and bigger the primary tubes are, the higher rpm your tuning for. Even the 62mm TB will have minimal impact with a stock motor, but all those bolt ons listed will add up nicely with some valve and porting work.

He told me about 4000 installed for a blueprinted and balanced RV build 4.0 which is pretty darn good considering it would make about 237hp at the wheels. This is where I'm pointing when my motor tires out.

Anyone else have a modded motor that cares to comment? Again I am all about torque driving up a very steep grade daily and in gooey mud. Would like to hear what you run, what you learned, things that work!

Thank you.