Sorry man. Work keeps getting in the way of my fun. Between deadlines and travel I haven't had much time for the stuff that makes it all worthwhileJ Bruce,
Dude, where the hell have you been?? I have reached out to you on a couple different occasions on the thread you posted and never heard squat back. I am aiming to stab my 8.1L with in the next week or so and I was hoping you were fifty paces a head to give advice. My MPI 7.4L pissed me off so OUT it comes an in with the 8.1L. I guess we will see how well the 8.1L clears the ORD HD engine crossmember here shortly. LOL. I am still running this engine on the MEFI-4 Delphi controller as the MPI 7.4L albeit a different engine calibration.
Hopefully, I will be able to report back with successful info before too long.
Sorry man. Work keeps getting in the way of my fun. Between deadlines and travel I haven't had much time for the stuff that makes it all worthwhile
Looks like you'll be the one to give advice next LOL. I want pics of the progress
The EMFI-4 setup is starting to look pretty attractive. I've probably cut about 10lbs of wiring out of the factory harness so far. I've got a few connectors left that I still need to ID but it's almost there. Then it's relocating the computer to the other side of the motor. Buying a harness is getting more appealing all the time LOL
[MrBurns]Excellent![/MrBurns]Well, the verdict is in….
The 8.1L mates up nicely to the SM454. The recipe is to use an 8.1L flywheel and pilot bearing. Then you will need to open the pressure plate mounting holes just a tad to allow for the larger metric pressure plate to flywheel bolts to pass through as well as remove the two dowel pins from the flywheel.
That motor looks like it belongs in there.The only other mod was the driver side engine mount had to be slightly messaged to clear an extra mounting boss that is cast into the engine block. The 8.1L also clears the ORD HD engine crossmember with ease. I would recommend removing Cylinders #5 and #7 coil packs before stabbing the engine as they get pretty close to the power booster.
Have you decided how you're going to hook up guages? Since you're running the MEFI-4 stuff I guess that means you're ditching the drive-by-wire and going with an aftermarket unit?Here are a few pics and a picture of the MEFI-4 wiring harness from Electric Wind (not pictures is the small relay pack).
Yeah those are the factory 7.4 manifolds (no EGR port so they're not the 8.1L units). The bolt pattern for the exhaust hasn't changed so any BB chev manifolds should work. You just need to watch the knock sensors and make sure they clear.Larry, what exhaust manifolds are you running? Are the the factory 7.4 manifolds?
Well, that is a drag about the bell housing. Things could be worse! Who knows what will happen when we try to fire these things up. :grinpimp:Got it running yet DirtyLarry?
I got mine bolted up to the tranny and tcases and have it slung between the frame rails. Working on engine mounts now.
Unfortunately I screwed up and used the wrong bellhousing so now I've got to pull it all apart again :shaking: I've got a nice hydraulic bellhousing that was supposed to go on instead *sigh*. Ah well it gives me a reason to pull it out so I can weld up the mounts properly.
Not trying to hi-jack, but seems like a few of u guys are pretty familiar with these 8.1's. Since the exhaust manifolds are interchangable, what is the chance that a carbed intake would possible fit? Probably a long shot, and sorry for butting in.