wrenchhead82

I am looking for more grunt from the old girl and hopefully better mileage. Was thinking about a top end swap. What head, throttle body, intake would you recommend? Also am looking at multiple brands of headers or possibly building my own. Header MUST be ceramic coated for heat issues. Lets hear your take on it!

wrenchhead82

No comments????

cruiser54

Your head is fine for grunt.
Is your exhaust manifold cracked? If not, just have a new headpipe made that is in two 45* angles without the factory "crush".
Don't count on any significant increase in mileage no matter what.

Get some 4 hole injectors to replace your notorious fuel leaking, fire starting ones.

And a 60mm throttle body from www.strokedjeep.com

wrenchhead82

The exhaust manifold is cracked, and I want the extra power/torque that is gained with a header. That being said, I have read somewhere that the H.O. Head would fit, along with the intake. I can't find where I read it.

cruiser54

You can put an HO header on your REnix Jeep. Bolts right up. You have to relocate your O2 sensor to the headpipe. That's easy and the wires are long enough. You can have a bung welded on to the HO header for the EGR bung also.

wrenchhead82

Is the HO intake compatible with the renix head?

cruiser54

Yes. If you use the intake exhaust gasket for the HO. The ports are off slightly, but no worse than most Detroit iron I've seen over the years.

There's no gain using the HO manifold on your Renix and the HO's throttle position sensor won't work with Renix.

wrenchhead82

Oh ok, I thought the HO intake was supposed to breathe better. Thanks for the info.

JerrytheJeep

Why won't the tps work with it? I've been thinking of this too.

cruiser54

It works opposite of a Renix, just like theh "trans" side of a Renix TPS. Besides, it mounts differently.

$180 kit from Hesco and it will work.

Me, I'll get a 60mm throttle body from www.strokedjeep.com. for $90 exchange. It's 2mms bigger than the HO throttle body and bolts right on using existing TPS.

Gee oh Dee

FWIW our 'manifold' is a tube style, very close to a header. So there won't be much of a gain there, if any at all.

As Pete said the crush in the mid pipe near the front drive shaft is the biggest bottle neck.

Getting rid of that and bumping that (and the rest of the exhaust from there back) tube diameter up to 2.5" will be your best bet for exhaust.

He speaks the truth, lol.

hankthetank

I'd say there is a substantial difference in design between a factory renix manifold and an aftermarket header...one is a manifold....one is a header.

cruiser54

That's Renix manifold to a header. Not a good comparison. Try HO manifold to header.

JerrytheJeep

Isn't that what this thread is about? Or are you just reccommending a HO manifold instead?

cruiser54

HO manifold instead as it compares more with a header than a Renix manifold.