top end swap

[bigdman]

i have heard about swapping out the top end (upper intake, lower intake) from a 3100, onto a 3.1. i have the 3100 and i have started porting the upper intake, and i will port the lower intake to. i have deleted the egr and i am chaging the mounting plate for the throttle body, my dad has a machine shop so this shouldn't be too hard. but i was wondering if it is possible to swap the top ends or will i just be wasting time? and if possible how much of a power increase could i expect?

 

sorry for the long post.

[GutlessSupreme]

You need the heads, too. The intakes won't bolt up to the old ones, and even if they did gains would probably be low.

 

From a full topend swap, I'd expect 15 hp or so. Pretty decent.

[bigdman]

oops, forget to say that i have the heads too. :oops: i have an entire 3100. but on one of the heads the exhaust valve bent from a broken cam. it's not bent too bad but it won't close. can i fix that or is the head garbage?

[GutlessSupreme]

I think chances are the head is ok, just replace the valve. But I'd have a shop check it.

[dbtk2]

You will like the gains of the swap but I recommend installing a cam at the same time. It should pretty much double your gains and will be well worth the extra cost and time. I never regret doing my topend swap, the power is awesome, the only time I wish I wouldn't have done it is the last 3 times my tranny blew up.

 

Shawn