Headers Headers Headers

[orion]

I just put a 3100 V6 in a Dune Buggy and im looking for some after market headers. My setup is like any rear wheel drive car. Now will the older model 60 degree v6 headers bolt up to a newer 3100?

[Anonymous]

I do not think anybody makes headers for the 3100. Is it a front mount, RWD, or rear mount motor?

If rear mount motor, is it transverse?

You will probly end up having to make them on your own.

[RacerX11]

If you can fit some RWD 2.8/3.1 headers from a Camaro or S10 truck into your chassis, you can modify them to bolt up to the 3100 heads. I modified my original iron head headers to work with my gen3 heads.

The easiest way is to plug-weld the original bolt holes in the headers, then re-drill them for the 3100 bolt pattern. You will also have to grind some material on the inside of the pipes to clear the D-shaped ports.

Marty

[Anonymous]

Would it be easier to just cut the flanges off and make new flanges that match the ports?

[ikessky]

TOG and S&S both make headers that will fit the 3x00

[Anonymous]

TOG and S&S both make headers that will fit the 3x00

But will they work in a rear/transverse application...?

[RacerX11]

This isn't a rear transverse application..he said it is like a RWD setup. If it was a transverse setup, the TOG or S&S would probably work.

Having the D-shaped tubing right at the head isn't that important. Most off-the-shelf headers will be 1-5/8" tubing, which is bigger than the port anyway. Simply porting them out in the corners of the tube is sufficient. If the flamge isn't welded onthe inside of the tube, you probably won't have to grind at all. I originally welded mine on the inside, which required grinding.

If the RWD headers fit, the only welding is toplug the holes. You can also just elongate the holes, and eliminate any welding, but it will be hard to keep the header lined up properly when you bolt it on.

Just a tip: don't buy the Pacesetter brand. They are total crap.

Marty

[orion]

the motor is mounted transverse. but i think anything will be easier to modify than what ive got now. thanks for all the help

[bszopi]

I'd say check out the uncoated S&S headers for your best bet...

http://www.ssheaders.com/4Cylinder.htm

Check out the 3400 RAW for the GAs. For $350, they are probably your best bet for modding them to work with your application. Here is a pic of the coated ones...

[donk_316]

Buy fiero headers. Will fit no prob.

[Anonymous]

Most dune buggies are rear transverse mount, as is this one.

In this case, those should work just fine.

[RacerX11]

They will fit no prob, except that the Fiero headers are for iron heads. For a transverse gen3 engine, the TOG's or S&S are the best choice. The S&S seem to be cheaper, but of equal quality.

Are you looking to have the exhaust exit to the rear of the engine, or out the front, then wrap around underneath?

Marty

[donk_316]

Funny, my fiero headers bolt on to fiero iron heads, 3.1 Aluminum heads and a set of 3100 heads.

[RacerX11]

They shouldn't. The gen2/3 heads have a different bolt pattern than the iron heads. The only way to do it is with slotted bolt holes, like I mentioned above. This makes it hard to align the header when tightening the bolts.

Do you have any pictures of your Fiero headers?

Marty

[donk_316]

No i dont. but you should also know that factory 3.1 manifolds fit with no modifition onto a fiero.

I think its more a "urban myth" than fact to say they are not interchangable.

I took a set of fiero manifolds and they bolt directly to a 3.1 AL head