[badassmonte]

im getting my 3400 uim lim and tb some time very soon but my question is getting them all ported and polished wait are going to be my gains if any

[MiKe0589]

I would just gasket match them, And somewhat smooth them out. Thats what i did and it worked wonders.

[nitehawkjcb]

20 HP or so?

[badassmonte]

what gasket set will i need for them

[badassmonte]

what gasket set do i need to get for this swap and what all do i need to do to get them to work im taking it to a mechanic and its the lim so im going to have them put them on it just need to know if its a straight forward swap i thought i read it somewhere but couldnt find it

lim,uim,tb are out of a 2000 ga

[Manitcor]

porting and polishing done right can give you gains however unless you are putting a bigger than stock TB on then you won't get much more than if you just gasket matched.

[badassmonte]

Manitcor, on 12 December 2010 - 04:18 PM, said:

porting and polishing done right can give you gains however unless you are putting a bigger than stock TB on then you won't get much more than if you just gasket matched.

im not going to p&p them and the 3400 tb is bigger then my 3100 tb and what do you mean just gasket match them?

This post has been edited by badassmonte: 12 December 2010 - 05:13 PM

[zipper778]

He means that you need to match the holes in your gaskets to the holes in your intakes.

[badassmonte]

do you think the mechanics will do this or not and every thing will bolt on or do i have to do anything else to it?

[nitehawkjcb]

Use 3400 gaskets. You'd need to dremel them britches, or bring them to a machine shop, in which case you might as well have them ported.

[Batman96LS]

if you take them to a performance shop and explain what you want done they will do it for you. otherwise take a dremel and match up the gaskets like others have said. if you are going to run a 3400 manifold on your 3100 then you should also be running a 3400 TB otherwise you won't get the full potential out of the flow gains. on small engines i don't know that you are going to see numbers as high as 20hp...but you might get upwards of 10hp on the car.

the best thing that you could do however would to be getting the manifolds and the heads extruded and honed out to match up to the gaskets and getting a 5 angle valve job done on the heads. it would be considerably more expensive but you would get the highest level of potential out of the setup then.

[SappySE107]

Gasket matching works, but is not the best performing. Has nothing to do with porting the rest of the runners, just that the actual port shape will improve flow when its not in the shape of the gasket.