want opinions

[90grandprixstet]

would it be worth puting a 3400 in the STE Turbo and putting the stock 3.1 manifold back on? i know that the ports are smaller, but the turbo could make up for it and im just looking for a touch more power while keeping it a completely stock look, im more into restoring it than power at the current moment...

[GhrarhG]

Depends on what you mean by worth it. If you're not looking at much more power, why replace the 3.1 with the 3400? A chip or turbo upgrade or both will be able to satisfy that.

[killinprixs]

it is worth it....  ive used one of my tgps as a test bed for this idea.  the motor will get pulled and thrown in my 5 speed car later this year.

[90grandprixstet]

well id love it if it was as simple as throwing a turbo and chip on the existing engine, but the existing engine has a really hard knock... its actually out of the car now and i plan on tearing it down this summer to see what happened...

[Shifter23]

I think 3.4 swap and go vintage on the top end.  It does drop performance but if you ported the heads and intake it will make up a little for the loss.  It would retain an all stock look but at least you would be upgrading.  Maybe a T28 hybrid turbo with the right tune would help this too.  It wouldn't be a max power setup but it would cover what you seek I think.

[killinprixs]

wait a minute,  im sorry, when you said put the 3.1 manifolds back on i was thinking about the exhaust manifolds... just realized you are talking about intakes?   I would never put 3.1 heads on a 3400... if you going to go through the trouble, why take the 3400 heads off and downgrade?