heY HELP I NEED IT

[13FIERO13]

what if i want to put a turbo on the 4 cylinder iorn duke
is it even possable



i have all the stuff to do it but can i do it?
and yes it might not make that much power but
i never seen one on a fiero so
HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!

[MrPbody]

When it comes to modifying a car, one can pretty much do whatever they want, as long as it's a realistic goal. Of course a turbo can be installed on the 2.5. Get the plumbing right for the exhaust and the rest is fairly simple.

If turbo-charged, the little engine will need some upgrades internally, in order to survive. The connecting rods GOTTA go! They're cast, not forged. Aftermarket units are available. Same is true of the pistons.

Pontiac has a raft of performance parts under the "Super Duty" moniker, for that engine (found in the "GM Performance" catelog). We've built a few that make over 300 HP, naturally apsirated, for "midget" racers. The aluminum cylinder head is a work of art, remeniscent of the Pontiac SD V8s. There's a forged crankshaft from Pontiac, but Callie's offers a "stroker" that will displace 2.7 lr. with a .030 overbore.

How deep are your pockets?

Jim

[13FIERO13]

they arent that deep i need something to work with decent power and cheap !!!!!!!!!!!!!!!

[Old Lar]

I wouldn't recommend trying to increase HP of the Fiero 4. New internals would be helpful as the engine was made for a "commuter" car. ~90 HP or so when new.

Deep pockets are helpful when trying to upgrade the iron duke for performance. Especially for an old engine.

[MrPbody]

Old Lar,

The "Iron Duke" began life in 1960, as "153", in Chevy II. It's essentially the same as the Chevy straight 6 (230, 250) with two cylinders lopped off.

It was used through at least '68 (a friend had a '68 Nova so equipped). It also found a home in the smaller marine applications, and is still in production today for that, along with the 3.0 lr. version (181).

By '76, it was obvious Vega wasn't going to "cut the mustard", so they (GM engineers) looked to the old engine. They redesigned the head (a little) and made it all "metric". The 151 CID "2.5" Iron Duke was born. They used the name to be sure no one thought it was the Vega POS.

In '79, the "cross flow" head was introduced, dramatically improving higher-end performance. All the '80s 2.5s were this design, with small variations for FWD and RWD applications.

When Fiero became more popular than expected, Pontiac started a racing program for the engine. The 2.5 SD is a KILLER version of this engine. You can find them in total domination of the "Goodie's Dash" series. NOPI outlawed 2.5 AND Quad-4 immediately, as the Japs have no answer for those two engines. They (NOPI) allowed the Saturn 1.9, but at that time, no other GM engine... Maybe someone reading this can update the info.

Just wanted you to know a little more than the "commuter engine" history. Iron Duke is a great engine! The lack of periodic maintainence is usually the culprit if they die an early death. Fiero's smaller oil pan accellerated the issue.

Jim

[1986fierogt]

yes, you have to have the right down pipe and ever thing to fit just right but yeah you can i did it to my 86 fiero gt and it a v6 but my car had a lot of miles on the motor and it blow up so i had to take of the turbo