fuel mods

[83 crew cab]

ok I got the hx40 what kind of fuel mods you guys with the 40's running

 

[BushWakr - RIP]

Hey there '83,



Is your HX40 a stocker or hybrid???



In general you'll need the fuel to run it...

Do each one seperately and judge the results. . make notes. . it will help in the end...

It will be a bit slow to come up on boost but it will give you lots of air at the mid/upper range.

Pressure test you IC if you haven't done so.

Watch boost #'s and EGT's closely too... .



Set your AFC cone to max rich (makes alot of smoke difference)

Set your timing up



Set your Starwheel about 3 turns from the bottom (adjust for smoke)



Set your high idle (governor) to 3000 RPM by "high idle test", or by running it WO in 2nd gear. Watch to see were the engine "pull" starts to fall off, and were the tach finally tops out.

That is your "defuel point' and governed speed respectively.

Your "full fuel screw" can be run in a bit if it isn't already... .



You will find you have a bit more smoke at idle/low boost but it should clear up nicely after you come up on boost...



Pastor Bob.

 

[83 crew cab]

thanks Bob its a stocker shounds like I should be ok just wanted to make sure I did not neady major fuel work to turn the 40 George

 

[bgilbert]

George is the 40 for the crew cab or the Lil Red Express? Bill

 

[83 crew cab]

the crew cab need to drop the egt's before we start towing the lil red around this year George