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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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with Ads!  Again, thanks!
| | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | | | | | | Joined: Jul 2006 Posts: 79 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 79 | nice work efi. been happily watching your project . its nice to see an update . keep up the good work and good luck.
Edit: works now | | | | | Joined: Aug 2004 Posts: 1,067 Shop Shark | | Shop Shark Joined: Aug 2004 Posts: 1,067 | How's your under-hood temps? Are you melting wires?
52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird
| | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | Needed to install a heat shield and then its Ok. | | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | I'm waiting for one more part to come in from the CNC shop, then I can finish assembling the "built" turbo motor.
I have a bit of EFI testing to do on the stock motor that in the truck to test out some beta s/w. This will hopefully eliminate the need for the extra crank trigger wheel (36-1 tooth) and will allow me to run COP ignition abiet still in wasted spark mode until the MS sequencer is out.
Once proven then I'll be able to take the built engine to the engine dyno and won't have to pull the stock engine out to get the timing wheel off.
I'll post once all this is completed.
Last edited by efi-diy; 01/05/2009 2:27 AM.
| | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | I would have thought you would have welded your own manifold using heavy walled stainless steel tubing.
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | | | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | | | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | Quick update the built 4200 motor has been on the engine dyno without the turbo and NO2.. results will be released this weekend. Keep an eye on my thread on inliners... The # is quite good..
Teaser from the first pull to the last pull we found 95 HP by tuning.
Last edited by efi-diy; 06/25/2009 6:05 AM.
| | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | | | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | the run is N/A, not turbo. Show us the Boost.
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | | | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | I love the "the spare batteries for the video camera showed up"
I take it your at 100% on the injectors, is the next step higher pressure or different injectors?
What were the numbers?
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | Not often I stop in .. time of a quick update..
After suffering and recovering from some bad engine machine work the truck got back on the road late in the season.. Now running a bed mounted rad and remote electric water pump. Finally no more cooling issues.
A trip to the chassis dyno revealed 80 LBS/FT improvement at the rear wheels - same boost level (10) psi. Moving the intake cam CL made a HUGE difference. So much so I'm out of transmission capacity... now prepping to move up to a built 4L80E.
Also changing over to sequential fuel/spark control.
Anyone have a nodular 9" carrier around?
Next year I plan on driving the truck more than working on it, may try and make the car craft nat's. Bonneville is in the cards also.
The rear sump oil pan is out making swaps easier. Also am considering doing a cast aluminum bellhousing to allow a normal GM 4 speed to bolt up and /or a T-5 which seems to be popular.
Comments/feedback welcomed.
EFI
PS: didn't get full power numbers this year but a 4500 rpm it made 510 RWHP and 504 RW tq. The drivetrain had some issues ........
Last edited by efi-diy; 12/10/2010 5:44 AM.
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