how much is too much?

[Deny]

So all that information is going to come in very handy if someone could just give me a little bit of knowledge on how to get more fuel to my engine.
I was thumbing through my engine manual and theres a section in there about adjusting the fuel delivery volume for each cylinder. How hard is that to do?

Are you just asking how to turn up the fuel? If so, do a search on this site, and there are a few times when people post how to, and which srew to adjust, with pictures, and even which direction to turn it.
If not, I missunderstood your question, sorry.
Cheers,
Deny

 

[blownbj]

well I know how to adjust the full stop on the rack position but that just isn't doing it for me I need to get more fuel.

 

[brownbear]

Are you just asking how to turn up the fuel? If so, do a search on this site, and there are a few times when people post how to, and which srew to adjust, with pictures, and even which direction to turn it.
If not, I missunderstood your question, sorry.
Cheers,
Deny

I think you did mis understand. he can't get enough fuel cause he's running 20 psi boost.

 

[blownbj]

That's correct. I can't get enough fuel @ boost pressure. but I did some toying last night and I managed to get more adjustment from my HAC diaghram. I adjusted the spring inside to full tension with the adjustment screw on the HAC itself. Then It occured to me that my problem wasn't that there weren't any threads left on the HAC but that My HAC was hitting the EDIC motor. I Shimmed the mounting bracket a little to adjust the angle that it was mounted @ and filed down the backside of the HAC as much as I could and I got it to back off a couple more turns. Today I will take it out for a test drive to see what happens.

 

[Tapage]

take care .. ! be carefully

 

[Behemoth60]

...Then It occured to me that my problem wasn't that there weren't any threads left on the HAC but that My HAC was hitting the EDIC motor.

Exact same problem I am having on TippyR. Wastegate is deactivated on my AXT, HAC is adjusted so far back that it's hitting the EDIC motor, and EGT's are barely 400C, yet the power is substantially more than I've ever had before.

There is an alternative to the HAC... get rid of the HAC and install a bolt. Bolts actually came stock on some engines. In fact, Tippy had a bolt on it's original engine. I'm going to try and track down said bolt and install on Tippy to get some more juice out of it.

Peter Straub

 

[Mainer7]

how do you adjust boost on 13bt?

 

[Greg_B]

how do you adjust boost on 13bt?

Grainger valve, or shimming the wastegate. Stone and I are playing with the shimming method right now, and will post up when we are finished playing. Someone else (burger I think?) has placed a grainger valve on his, and and has talked about it it bit, but is still at the initial stages as well.

gb

 

[Radd Cruisers]

Good write up by Behemoth, should be put into tech section.

 

[sburles]

I have a granger valve on my 13-bt.It,s called a Dawes Device.About $50.It seems to work well.The adjustments are fairley acurratley described in the instructions(monitoired by in dash guage).I also found that the ETGS went down when I put the boost up to 13lbs. at near factory fuel settings.
This truck has larger exaust diameter.The only above 1100 degree ETGS I've seen was pulling a trailer up hills.This turned out to be the faulty of some unconsionable fiddling with the pump settings by a reportedly experienced mechanic.Ciran at Cruiserland sorted it out for me after comparing my pump settings to his truck (and profound tenacitey and patience)........now the truck pulls like crazy,runs cool and little smoke.

The former smoke and heat issues were formerly attributted to other causes......when all that had happened was the pump had been twequeked way off spec.

Cheers Stephen

 

[Little Joe]

govenor diaphragm

Here is a question that has been floating around in my mind..........
With all the experimenting with boost pressures/fuel etc, what is the maximum pressure the gov diaphragm will live with(before it ruptures).

I have ruptured a gov dia. sensing line twice now(running 12-13psi) and enough fuel to hit 1150 post turbo only on the most extreme pulls.

First time was at 12000' in Colarado running 2800rpm in 3rd and 1100F.

Second time was topping the Manic 5 dam (Quebec on the way to Goose Bay).
This is a 18% grade about 1 mile long and it required 1st gear pulling my 2500lb camper.

Note: I did have to back my fuel off 1/4 turn to run the altitudes in Colarado and Moab.


Steve M

 

[brownbear]

ah ha!

I found that link easy.

http://www.dawesdevices.com/boost.html

for boost controllers. I may order one today.

26 bucks is pretty cheap. no fawking around mod'n a grainger valve.

 

[Greg_B]

ah ha!

I found that link easy.

http://www.dawesdevices.com/boost.html

for boost controllers. I may order one today.

26 bucks is pretty cheap. no fawking around mod'n a grainger valve.

Does your garret not have the ability to adjust the wastegate on the rod?

gb

 

[Greg_B]

With all the experimenting with boost pressures/fuel etc, what is the maximum pressure the gov diaphragm will live with(before it ruptures).

I have ruptured a gov dia. sensing line twice now(running 12-13psi) and enough fuel to hit 1150 post turbo only on the most extreme pulls.Steve M

I am not understanding this: Do you mean you have popped off the line that goes from the intake to the diaphram housing, or do you mean you have ripped the diaphram? I know folks talk about clamping the lines on, after turbo and upping the boost.

gb

 

[Little Joe]

gov diaphragm

I am not understanding this: Do you mean you have popped off the line that goes from the intake to the diaphram housing, or do you mean you have ripped the diaphram? I know folks talk about clamping the lines on, after turbo and upping the boost.

gb

Hi Greg

I have ruptured (blown a hole in) the sensing line that goes from the intake to diaphragm housing on two occasions.(the sensing lines are clamped on).

My question.......at what pressure will the gov diaphragm let go? I have not upgraded the sensing lines as they have proven to be the weak link and are much easier to repair than changing a diaphragm.

I have never exceeded 13psi but have run at 12 for hrs on end while towing returning a consistent 20 Cad.mpg.

Steve M

 

[Greg_B]

Dunno. Super 70 posted a while back he is running 15lbs, and did not mention anything about issues with the diaphram. Maybe he will post up...or someone else who is running with psi in that range.

hth's

gb

 

[brownbear]

Does your garret not have the ability to adjust the wastegate on the rod?

gb

nope no threaded end on mine. I would have to weld an adjuster in the middle. or get a valve.