[Jack Gifford]

This is how to slow a blower down to 19% of crank speed!

[GTO-relic]

it's going to be seriously out of balance with the torsional loads only on far ends of the block.
take a regular Pontiac V8, pull the middle 4 spark plug wires, start it up.
or better yet, take the old Pontiac 4 cylinder half v8 engine, pull the middle spark plug wires,
start it up.
those ran wobbly rough as schit even with all 4 cylinders firing brand new,
like they had a constant miss.

that's how it's gonna run.

the drive shaft connection is like going to hell to light a match,
why not just put a regular crank in, and remove all the pistons/rods you don't want to use ?
you're reinventing the wheel but making it square to see how it rolls
yes you can sit on a rocket, light it, and go really fast like the cartoon Coyote
would you really want to do it though ?
it's a great thread attention getter, but that is engineering silliness.
there's an old saying, you can't make chicken salad out of chicken schit...
and you can only polish a turd so much...
no offense intended, just being honest.

sure it will make HP. I can put a blower on a Yugo 4 cyl it'll make tons of power too.
why bother ? build a real V8 hemi with those heads dude !

[tom s]

Jack has been building and RACING Pontiac Hemis for years!He has nothing to prove with a V8 or even a 4 cyc Hemi!Tom

[misterp266]

Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons?
... or has built a record breaking DOHC hemi four cylinder Pontiac?
... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967)
... or has a Pontiac born the same year as Jim Wangers? (1926}

“it's a great thread attention getter, but that is engineering silliness.
there's an old saying, you can't make chicken salad out of chicken schit...
and you can only polish a turd so much...
no offense intended, just being honest.”

Nice work good Jack. Your engineering silliness is outstanding! Looking forward to hearing how it runs. Mickey would love it!

[Jack Gifford]

Originally Posted by misterp266

... Looking forward to hearing how it runs...

So am I.
I don't know about producing power, but I'm guessing it will SOUND even nastier than the four did. CR is up to 12.8:1 (from 12.4), and cranking compression is 180 and 170 PSI prior to break-in (was in the 150's for the four).

[Jack Gifford]

Finally got a good test run of the twin today. The tune is close enough to see A/F ratios in the ballpark- 4.8 to 5.4 with a throttle hit. No unusual vibration or shaking. So I'll start re-installing it, shooting for the July event in Loring.
Strange- how the exhaust doesn't sound like a twin, just sounds mean like the four did! And totally unlike my odd-firing John Deere.

[steve25]

Very good to hear Jack!

I hope all goes superb for you.

[Scott Stoneburg]

Glad to hear it's running, looking forward to seeing/hearing any videos of it. Nice job!

[mgarblik]

Great to hear it's running once again! Pics and/or video please. Like keeping up with your progress.

[Jack Gifford]

I had always installed just the long block into the lakester, then did the cramming of all else. With the engine/drivetrain assembled from the test run, I decided to try installing it "whole". Only a couple pieces needed removal, such as the exhaust which protrudes out through the frame rails. Modifying some points of interference took me about three days, but it's now bolted in place. Adding fuel and oil tanks, plumbing, wiring, linkages, etc. will take at least a few more days.

[PAUL K]

Thanks for the update.

Pictures would be great.

[Jack Gifford]

Originally Posted by PAUL K

.., Pictures would be great...

That's what I muttered while trying to remember how I had fit everything in such a small space!

[Jack Gifford]

Finished cramming everything in. The one open space is required to allow changing gears in the top-load quick-change box. Added fluids, fixed leaks, and primed all systems. Ready for some more tuning and checking.
The body panel over the engine has always been a two-man job, so I'm working on hinging it to the passenger[?]-side, to be able to deal with it by myself.

[Mr Anonymous]

lookin' good!

[Jack Gifford]

Just finished what I promised myself after destroying the engine by not fully opening the fuel shutoff prior to a run. Added a very bright lamp on the dashboard which is illuminated whenever the shutoff valve is not fully open.

[sdbob]

Thank you for sharing. Just amazing all the engineering.Good luck.Sometimes I wonder about luck is it real or is success measured by preparedness?

[PAUL K]

Originally Posted by Jack Gifford

Just finished what I promised myself after destroying the engine by not fully opening the fuel shutoff prior to a run. Added a very bright lamp on the dashboard which is illuminated whenever the shutoff valve is not fully open.

That's learning the hard way ..... Been there, done that!

Two cylinders are better than no cylinders!

[Jack Gifford]

Removing the body panel over the engine has always been a two-man job. So I just finished hinging it on one side, so I can deal with it by myself.

[mgarblik]

Originally Posted by PAUL K

That's learning the hard way ..... Been there, done that!

Two cylinders are better than no cylinders!

It worked for Mickey Thompson, It can work for Jack Gifford! Keep up the good work.

[Jack Gifford]

I had to ditch the Hilborn scoop, since the hinged body panel would not clear it. So I built a mini-scoop for the Hilborn 2-port (block-off plate over the back two ports of a 4-port injector).