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Engine Specific Info and Questions => IDI Engine => Topic started by: ixx on August 11, 2009, 06:40:24 pm

Title: Full Load Adjustment Screw
Post by: ixx on August 11, 2009, 06:40:24 pm

What does this do? On my Cummins it equals more power to adjust it if I remember correctly. Never did. Stupid question, but what is the effect on a N/A engine if any? Any negative results possible? I really like my VW and don't want it to die. It is a 81 1.6 diesel btw.

Title: Re: Full Load Adjustment Screw
Post by: 8v-of-fury on August 11, 2009, 07:34:38 pm

on the VW rotary pump.. adjusting that screw (within reason) adjusts how much fuel is at what position the pedal sits. So to make that understandable.. say for ***s and giggles that stock at half throttle it is injecting enough fuel to run the engine at 2500rpm.. turning that screw and increasing the amount of fuel per pedal position, will increase how much fuel is injected.. So now instead of having the fuel for 2500 you have enough fuel for 2900rpm, yet still at half throttle. If you can get your engine to breathe well enough to burn all this extra fuel.. you have.. in theory Free Power  ;)

However.. with an N/a get a Pyrometer in there before you start messing around with fueling too much.. or you WILL melt stuff lol

Title: Re: Full Load Adjustment Screw
Post by: 8v-of-fury on August 11, 2009, 07:36:10 pm

Open up the exhaust, Open up the intake (LET IT BREATHE!!), turn the fuel until you get a good light haze at WOT.. then back it off a bit, and you will remain in the safe levels, and your car will love you for it :) It will surely liven the little guy up Lol

Title: Re: Full Load Adjustment Screw
Post by: Rabbit on Roids on August 11, 2009, 10:32:59 pm

or........
slap a vnt on there and go like hell and never get high EGT's

Title: Re: Full Load Adjustment Screw
Post by: 8v-of-fury on August 12, 2009, 06:33:54 am

Is that your answer to all life's problems Kevin? a VNT? lmao

Title: Re: Full Load Adjustment Screw
Post by: ixx on August 12, 2009, 06:54:07 am

First off, what is a VNT? My exhuast is a 2" straight pipe to a cherrybomb muffler. As far as intake, all I've done is cut a bigger opening in the air filter housing. This truck never had the hose like I've seen on others. I also hope to put a full gauge cluster on as soon as the wife isn't looking. I've already had to replace the brand new engine once due to the incompetence of the previous owner. He converted it to a diesel and assembled the engine himself (purportedly) but forgot little things like torquing down the bolts. Consequently, I lost #4 connecting rod on I-5.

Title: Re: Full Load Adjustment Screw
Post by: smoken u on August 12, 2009, 09:05:21 am

VNT is just a shortform for variable geometry turbo

Title: Re: Full Load Adjustment Screw
Post by: Rabbit on Roids on August 12, 2009, 10:34:26 am

Quote from: 8v-of-fury on August 12, 2009, 06:33:54 am

Is that your answer to all life's problems Kevin? a VNT? lmao

yes, that is the answer to all of lifes complicated problems. VNT's fix ANYTHING!
lmao
if you cant put a VNT on there to fix it, its not worth fixing. haha.
now i just wish i could get a 5 cylinder VNT turbo like the 1749VA, but bigger.