interesting EFI project

[dieselgeek]

This past weekend I caught a few minutes' video of a low-buck truck a friend of mine put together. I've tuned EFI on a couple of his other cars, but this time he wants to slow down and have a decent pickup truck to pull his boat around to the different lakes in SW MO.

It's a 1951 GMC half ton pickup with a 311" Jimmy straight six engine. In one day we wired up the EFI system and got it running pretty good. I killed a couple coilpacks by over-dwelling them (oops) but otherwise, it's running like a champ.

EFI is Megasquirt-2x, Ford EDI trigger wheel and pickup, and 6 LS2 coils running in wasted spark. 50 lb/hr injectors, and an HX35 turbocharger with a decent sized air-air intercooler. TH400 trans, 2.73:1 rear gear, should make a decent tow vehicle and highway cruiser.


It's not often I run across EFI turbocharged distributorless Jimmy engines so I thought I'd post up a quick vid of it running. It beats the usual discussion here by a mile, IMO!

http://www.youtube.com/watch?v=K9FDCyBAXZE

[dieselgeek]

some pics

[enigma57]

Sweet ride and nice tune, Scott! Dig those 302 Jimmy rigs.

Happy Motoring,

Harry

[1989TransAm]

Very nice. I love it. I hope you have a chance to post the finished product.

[dfree383]

yes but whats the benifit? Who Cares? whats the commercial viability of the system ........

[enigma57]

No commercial viability beyond those few who want to install a similar system on their vintage inline 6's, dfree383. There is more to life than dollars and cents, though.

The benefit for the builder lies in the sense of accomplishment and the pleasure of conceiving and executing a one off system for his vintage vehicle that upgrades performance and enhances his vehicle's ability to do what he asks of it in daily driving. Its a work horse, not a trailer queen.

The benefit for the tuner is that by working on one off systems rather than limiting himself to cookie cutter bolt-ons for the more numerous modern applications...... He has the opportunity to learn aspects of tuning that he would not experience otherwise...... Enhancing his skills and experience base. And like the builder, he will have a sense of accomplishment and pride in a job well done.

That's what hotrodding is all about in my view...... Innovation and doing as much of it yourself as you possibly can.

Best regards,

Harry

[dfree383]

:wink: No commercial viability beyond those few who want to install a similar system on their vintage inline 6's, dfree383. There is more to life than dollars and cents, though.

The benefit for the builder lies in the sense of accomplishment and the pleasure of conceiving and executing a one off system for his vintage vehicle that upgrades performance and enhances his vehicle's ability to do what he asks of it in daily driving. Its a work horse, not a trailer queen.

The benefit for the tuner is that by working on one off systems rather than limiting himself to cookie cutter bolt-ons for the more numerous modern applications...... He has the opportunity to learn aspects of tuning that he would not experience otherwise...... Enhancing his skills and experience base. And like the builder, he will have a sense of accomplishment and pride in a job well done.

That's what hotrodding is all about in my view...... Innovation and doing as much of it yourself as you possibly can.

Best regards,

Harry

I'm with you Harry, Schmitt doesn't seem to see much like that.... Its only a waste of time ?!?!!?

Nothing quite like taking something old and making it new again.........

[ZIGGY]

Diesel - thanks for posting the description & pix. I for one was interested & enjoyed.

[Speedbump]

On a serious note, it appears this is based on an older 270 block? If so, was the oiling system upgraded to a full pressure system for the boosted app? How about the rod and main bearings? My memory says they used inserts but used shims to set the oil clearance. If so was that also changed. I don't agree too often here, but agree with Harry. That is close to the pinnacle of good hot rod technology/engineering. Great stuff!

[pdq67]

311" Gimmie 6-banger, so I have to ask, just what is the oem engine size and now it's present B&S, just for me to know is all.

pdq67

[machine shop tom]

WAY better than sticking another SBC into it.

tom

[dieselgeek]

On a serious note, it appears this is based on an older 270 block? If so, was the oiling system upgraded to a full pressure system for the boosted app? How about the rod and main bearings? My memory says they used inserts but used shims to set the oil clearance. If so was that also changed. I don't agree too often here, but agree with Harry. That is close to the pinnacle of good hot rod technology/engineering. Great stuff!

I will ask Gary to log in here and explain. I know little other than it does have something done to the oiling system. He reworked the intake for more plenum volume and reports that it's running very good. Hoping to visit them in the next week or two, and take more video of us cruising around and tuning.

[SchmidtMotorWorks]

Speaking of GMC sixes, I did this design about 6 years ago.
Uneven bore spacing, 3 main, siamese port POS.

Supercharged, Intercooled, injected etc, I have all the drive stuff somewhere.
It also included a piece that bolts to the top of the head to fix the rocker geometry and billet steel rocker arms.
The flow was done with Fluent CFD, tuning with Ricardo wave, the stress with NASTRAN

And yes, it was probably the biggest waste of time I have had in the last 6 years. Well maybe not the worst, one day I helped my neighbor cut the bushes in front of his house to look like animals.