 
     |
| alternate iron duke as replacement (Page 1/1) |
|
sleek fiero
|
JUL 22, 01:04 PM
|
|
|
Just a stupid Question about iron duke Fieros . I am in the process of building a 2.5 ID for a boat. While I was working on it I started thinking why don't Fiero owners consider the 3.0 Iron Duke from a marine application for their ride. They are the same basic engine only they are 170 hp right from the get go. Am I missing something? I think I will pick up a 2m4 and give it a go. Its just a stroker version of the 2.5. Has anyone here tried this?
|
|
|
|
Dukesterpro
|
JUL 22, 01:09 PM
|
|
clever thought cant help but wonder if it has to do with a bellhousing incompatibility. Alot of the marine dukes used the SBC bellhousing. I might be remembering wrong but worth checking into.
|
|
|
|
sleek fiero
|
JUL 22, 01:20 PM
|
|
|
Yes you are right. I was looking through other forums for trucks and boats and it looks like maybe the internals can be used to build a stroker with the Fiero /citation/gm fwd blocks. Just a thought sleek
|
|
|
|
theogre
|
JUL 22, 02:54 PM
|
|
Marine engines often have "reveres" crank rotation to Vehicle versions.
Often need to change the cam & more to use them in cars.------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
|
|
|
|
sleek fiero
|
JUL 22, 11:59 PM
|
|
| quote | Originally posted by theogre:
Marine engines often have "reveres" crank rotation to Vehicle versions.
Often need to change the cam & more to use them in cars.
|
|
thanks but I checked and according to Mercruiser all 2.5 and 3.0 sterndrives they build are ccw rotation same as a car. the particular one I am rebuilding is ccw rotation and flat tappet cammed. well built with metal timing gears and electronic distributor. Just an option for someone who wants to gain a little performance and keep the original look of the engine compartment.
|
|
|
|
fieroguru
|
JUL 23, 06:52 AM
|
|
|
|
|
Dukesterpro
|
JUL 23, 09:25 AM
|
|
| quote | Originally posted by theogre:
Marine engines often have "reveres" crank rotation to Vehicle versions.
Often need to change the cam & more to use them in cars.
|
|
If you find a reverse rotation 3.0 merc\omc\volvo in the wild I will eat my hat. 99 percent of the ones you are going to find are going to be standard automotive blocks that have been beefed up a little (if at all).
|
|
|
|
sleek fiero
|
JUL 23, 10:25 AM
|
|
|
I didn't realize this topic had been so well covered. I just brought it up for discussion as I have reconditioned several 153/151/ 181 marine engines and knew they were related . The forged crank in this 3.0 liter Mercruiser looks like it could be a good option to build a strong duke powered car. sleek
|
|
|
|
Dukesterpro
|
JUL 23, 11:30 AM
|
|
|
This is something Id really like to see someone do. Even if the value proposition is poor. It be interesting to see a Fiero with a beefed up Iron Duke, the engine that brought the car infamy
|
|
|
|
Dennis LaGrua
|
JUL 25, 02:15 PM
|
|
I believe that the longer stroke crank flange of the 3.0 L Mercruiser engine is not compatible with GM automobile transmissions. The Duke has been modified for a bit more power but is limited by light duty rods and a 4500 RPM redline.
Some info here:
Upping Duke Power
2.5 engine resource pages
Just a guess but the later S-10 Duke engines may be a stronger platform to work with.
------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE " [This message has been edited by Dennis LaGrua (edited 07-26-2024).]
|
|
|
