3.4 pushrod forced induction

[vega]

an 85 fieor gt 3 spd auot now going to be a 4 speed auto either one oif the fallowing.

4t60
4t60e
4t65e
4t65e -hd
4t80
4t80e

[vega]

why? which do you think would work out the best?

[BillS]

If you are really going to go with that sort of boost you will be building a very expensive engine.

I use up to 13 psi on stock 3.1 crank (identical to the 3.4) and rods, with forged Ross pistons.

20 PSI is a different ball game.

[vega]

the real goal is to run about 375 hp or so. and how do you figure it will be a VERY expensice engine to run 20 psi? a forged everything will run me about a grand the turbo setup will run about another grand give or take. and the engine about a hundred.

[BillS]

the real goal is to run about 375 hp or so. and how do you figure it will be a VERY expensice engine to run 20 psi? a forged everything will run me about a grand the turbo setup will run about another grand give or take. and the engine about a hundred.

How old are you? How many engines have you built?

I may be totally wrong, but you come across as a kid with great ideas and not much experience, and probably little likelihood of actually having the loot to do a serious project.

If you think your numbers are right, you haven't taken a close look at what real world costs are for this sort of project and you are just spouting numbers of BHP you would 'like' without any real idea if they are realistic or not.

If I am wrong, my apologies, but that is how it looks.

If you want that sort of power, forget about using the inherently inferior cast iron head engine, and forget about doing it for a couple of thousand bucks - it isn't going to happen.

[TurboZ24]

The iron heads can flow well, but it takes a lot of work. Mine now flow 229 intake/200 exhaust @.05", but the port diameter on the exhaust alone was increased .25", but cost.... when I cracked a head, it's replacement core ran 15 bucks, but..... the machine work (spring seat machining, port work, o-ringing, bronze valve guides, valve job) ran me close to 500 bucks and as Colin knows, I get "good" pricing.

I probably have 4000-5000 bucks in machine work/parts in just my engine. Now, I built it with the full intention of trying to push 600-650 crank HP out of it and 25 psi.

I'm not totally sure what it would take if 375 wheel HP was the max goal (mine is already 310 wheel at 7 psi). I'd at least do pistons, rods, a nice set of gapless rings, head gaskets probably will be an issue, you will need a sufficient oil cooler, aftermarket ECM, and all the piping, etc. I had issues with flat tappet cams after a certain point (kept flattening all the exhaust lobes).

Since you are talking about using a Fiero, you will need to do something, either water to air intercooler, or fit an air to air in the package area, do something with the cooling (I don't trust that rad setup, so definately research it), etc.

You will also need to build the tranny to handle the output. You could try to use a 4T65E stock, they do fail in the FWD 3800's with just a few mods, though. A good build will run you a couple of grand. Any E series tranny will also need a controller, so the only one current aftermarket runs around 700 bucks.

I suggest to most people if this is your first attempt, shoot for a lower goal. It isn't difficult to produce good HP out of a mostly stock 3.1. For example, basically stock 3.1 (aluminum head), little head work, mild turbo cam, got 229 wheel HP and 261.7 wheel ft lbs @ 6 psi. It enough to be fun and still very drivable. The iron head with some work also should be able to do the same. That motor should be able to push 12 psi and around 270-280 wheel HP as it is.

----------Add-------------

As someone mentioned to me, yes I do know the difference between the word too and to (I corrected this post). I subconsciously transpose those words, so it isn't out of lack of knowledge (my parent's sure would be pissed, since they spend tens of thousands just for my high school education). If that's difficult to follow, it's a good thing that the internet doesn't also transmit my southern accent.

[vega]

Well first off i don't genrally tell poeple my age on the internet- and no i am not in my teens 19 and under first off. Second I come from DSMs and TURBo hondas and rb26dett/25det powered 240s, and also turboed zc to b18s in hondas. I have made my own turbo kit before. And it has averaged (as i have done it a number of times) around 1200 bucks just to throw all the turbo equipent on the an engine (with an ic mind you) and then about (i am used to the number) expect 500 to go to just pistons and about 2-300 to go to rods rings> i generally do little or no head work the engines i have done up. Most of the enignes i worked on were extremely resticted when it came to intake/exauhst.

When it comes to going from import to the GMC american eninge setup i have done sbcs I currently have a 500ci Caddillac 500 i am building (stock 425hp and 575 foot pounds at engine) and a SBC 327 out of a 65 vette (stock 350hp at enigne)

So have you ever heard of the phrase- making assumtions makes and ass out of you U and ME?

as far as what kind of intake i am going to use - i am going to go carborated here. It is cheaper in the long run and i have done it that way beofre with an old ford 302. I have never done a blow through carb though.

As for cam i think maybe a h260 cam with a t3 turbo will suffice? what do you think of this? I am not sure but maybe a t61 turbo is a little small. And i am sorry i ment that i needed 375 enigne hp i am looking for around 300 to the wheels.

I live in mn and there is le mans style racing up north and i would need about 300 to the wheels to keep up with some of the mid level classes. With a fiero it should hook up fairly well as well. i am thinking about not useing a 65e for the reason of the 700 dallor controller. I may end up building a 4t60. Why? well as it stands now my 125 (whihc is shot) can hold to about 195 tq. Oreif over at the fiero forums (pennock's) had his 125c built at around 2000 grand total. And it held up to a 4.9 and his carbed 220 (engine Hp mind you) 3.4 pushrod build.

Any other sugjestion?