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Old 04-26-2015, 12:45 AM   #40 (permalink)
oil pan 4
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Join Date: Jul 2011
Location: NewMexico (USA)
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Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

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My Madmax tune looks like its going to be something like, 0.042'' accelerator pump jets (about 30% bigger than standard) running max stroke, 0.104'' secondaries (9% larger than standard and the largest standard metering jet), 0.95 primary jets (5% smaller than standard) with 7047 metering rods (standard).
I think the 0.95 primary jet will allow me to just replace metering rods to change normal driving charaistics.

The small accelerator pump nozzle was too small. Caused the engine to sputter. Tried the standard nozzle, also too small.

Now this carb is normally used on small block engines, ranging from 5L to about 6.6L.

I run the same carb in my Camaro and its jetting is totally different than this.
The primary, secondary and accelerator jets are all smaller.
The factory setup 1405 carb will run stupid rich all the time on a 5L at this elevation.

The same carb on a 454 will run kind of lean when you don't want it to, but then will run a little rich at cruse. Getting it to run a little lean at cruise is the trick and I think I got it.
I am sure its not going to be happy cold starting.

Edit: when I took the motor apart I pulled the exhaust valves and they showed no signs of burning.
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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.

Last edited by oil pan 4; 01-12-2017 at 02:28 PM..
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