12-19-2016, 06:50 PM
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#51 (permalink)
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EcoModding Lurker
Join Date: Dec 2010
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I'm interested in seeing how this turns out. Sure there are better, higher MPG options, but the recycling and run-what-ya-brung attitude is more in my line of thinking. I don't always have the cash to upgrade a whole powertrain, but a little tinkering and ingenuity make it a lot more fun.
$600 in parts is pretty significant. I'd also go EFI, but I'm not BassDoctor.
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12-19-2016, 07:05 PM
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#52 (permalink)
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Corporate imperialist
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__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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12-19-2016, 10:12 PM
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#53 (permalink)
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EcoModding Lurker
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the motor for my El Camino is a 400 cid block standard crank and .030 over pistons. RV towing camshaft. 350 Vortec heads with Vortec manifold and 650 carb.. as built producing almost 400 ft/pound torque but will not run higher than 5000 rpm due to carburettor. Right now i have a TH200R4 trans with 2.72 rear. TH200R4 have low enough first gear so you will not be hampered by slow acceleration when needed. overdrive kicks in at 45 mph and get rpm to 1350 at 55mph and around 1550 at 65 mph. Will be converted to TPI system later on and 5speed manual T5 since i am not punishing engine.
Getting around 24-26 mpg and i tell you it is not slow or underpowered.
sorry forgot to tell you it is a 1986 model
Last edited by lacke; 12-19-2016 at 10:14 PM..
Reason: brainfart DUH
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12-20-2016, 05:27 AM
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#55 (permalink)
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Master EcoModder
Join Date: Jul 2009
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2.44 gear with an aux underdrive along with an overdrive transmission.
Use the underdrive and 1:1 gear in the transmission for when you must have more grunt.
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12-20-2016, 06:04 AM
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#56 (permalink)
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(:
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Sounds like that would be a V8 dog. Might as well have a little engine.
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12-21-2016, 12:22 AM
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#57 (permalink)
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EcoModding Lurker
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I wish people would list their motor builds including SCR, DVR, Camper number, Compression readings and fuel used.
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12-28-2016, 03:12 PM
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#58 (permalink)
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EcoModding Lurker
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Orders a cam today from summit. It's a comp 12-204-4 HYD.
244/244 Seat Duration
196/196 @ .050
110 LSA
Waiting on my machine shop to acid dip the heads and block. Their checking the parts for cracks too.
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12-29-2016, 10:34 PM
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#59 (permalink)
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ScanGauge <3
Join Date: Dec 2016
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Apologies if this doesn't apply, but I had this thought -- back in the late 1960s, VW started putting throttle positioners/dashpots on the carburetor to avoid that momentary burp of fuel when letting off the gas pedal allowed the throttle plate to close suddenly. Does the Holley have provisions for something like that? Even though the main goal was emissions, seems like it would be good for FE too.
P.S. Maybe this is something your vacuum gauge and TPS sensor would help you avoid, I dunno. 
__________________
Best tank (so far): 32 MPG
Last edited by ThermionicScott; 12-29-2016 at 10:46 PM..
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12-30-2016, 11:20 AM
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#60 (permalink)
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EcoModding Lurker
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I don't think Holley's do have a means for a dash pot.
Currently I'm working on a set of annullar booster. My thoughts are a carb has two equally important jobs. Mixture ratio and Fuel droplet size.
The annular booster I've used in racing showed a huge " set of the pants" improvement as long as the timing is set accordingly.
Smaller fuel droplets have a faster burn rate and seem to need less advance. I was running 34 degrees and went to 28-30 degrees with an annular booster and it brought the motor alive coming off the corner. They thought I was running a 383 in stead of a 355.
I have found in high vacuum situation on carbs, that the accelerate pump discharge nozzle screw needs to be modified to accept a small spring to keep the tapered needle seated. At constant throttle, high rpm the airflow will siphon fuel from the pump nozzles.
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