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Author Topic: 2010 Edition of the Governor Mod  (Read 108083 times)

Reply #60July 05, 2010, 01:38:26 am

RadoTD

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Re: 2010 Edition of the Governor Mod
« Reply #60 on: July 05, 2010, 01:38:26 am »
One thing I can't seem to find clear info on is the effect on the RPM limiter. On the first page, Eddy said he shimmed the main spring solid and was bouncing off of the rev limiter at just over 6000rpm. Would this have been rollers skipping instead?

Has anyone tested to see what rpm you can hit with a partially shimmed governor? Preferably with some load on the engine.

I'm just thinking that during a hard 2nd gear pull, if one were to get the turbo(s) spooled nicely then hit a bump, tires can break loose and go from 4000rpm to much higher very quickly. Particularly with my 1.9, that's a situation I'd like to try and avoid. I'm tempted to order an Auber Instruments mag pick up and gauge and have it cut the 12V solenoid at whatever rpm.

Any insight to this?

enough boost is when you have 3 dimple marks in the hood from the valve cover nuts..  ;D

Reply #61July 05, 2010, 01:03:17 pm

Rabbit on Roids

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Re: 2010 Edition of the Governor Mod
« Reply #61 on: July 05, 2010, 01:03:17 pm »
with power, and you hit a bump, the tires definitely break loose. you either hold 'er floored till it hooks up, or let out and get back on it.

a little more insight, these engines are designed after a gasser. 1.6 is very close to 1.6/1.8 gasser engines. and the 1.9s are basically diesel ABAs. our bottom ends will take whatever we can throw at them. they turn ABAs 7500revs on stock bottom ends. and even more on the 1.6/1.8 engines. our engines will do the same if they were fueled to do so. the rollers start skipping at around 6500 or so ive been told. if someone fit bigger springs from a 10 or 11mm pump head, on the 9mm pump, it would probably give you another thousand rpms worth of revs before they started skipping. but you would need that much more fuel to spin more revs.

i think we are pretty safe to rev these engines to the moon. the pump simply wont let anything turn unsafely high rpms.

you can put a rev limiter on it if you want, but i have heard of a auto-xer that mis shifted and hit 9000rpms, it didnt run afterwards, but it wasnt injured either. the adjuster pucks flew out of the lifters.

i know im getting close to my rollers skipping on my pump, cause my rabbit and GTI have similar, not real close, but sorta similar gears. it flat out eats my gti alive tho.

Reply #62July 06, 2010, 12:08:37 pm

RadoTD

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Re: 2010 Edition of the Governor Mod
« Reply #62 on: July 06, 2010, 12:08:37 pm »
Sooo, just grow some balls and git-er-done?

9000rpm? My tach would swing around and hit the needle at zero! :D

enough boost is when you have 3 dimple marks in the hood from the valve cover nuts..  ;D

Reply #63July 08, 2010, 07:03:35 am

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Re: 2010 Edition of the Governor Mod
« Reply #63 on: July 08, 2010, 07:03:35 am »
you could do all of this or just see Jedi Master Giles, I plan to hit the upper limit of the 7000 rpm range with my build, using mech lifters I don't forsee any problems, however my build is super intense
dnahtasinoivilboeraweb
you know, decarbonated beer is a better coolant than the stuff you buy at the auto store, and is better for you...... really
"If the boost were to rise then the throttle would remain in the wide-open throttle position, which might be fun, but probably not for long"Libbypapa

Reply #64July 09, 2010, 02:34:29 pm

Rabbit on Roids

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Re: 2010 Edition of the Governor Mod
« Reply #64 on: July 09, 2010, 02:34:29 pm »
Sooo, just grow some balls and git-er-done?

9000rpm? My tach would swing around and hit the needle at zero! :D

dude, ive got a turbo @ 20 psi, a gov mod, and some other work done to my engine. im still using stock VW gauges, no EGT, no oil pressure, nothing. it sees 6000 - 6500 rpms too.. im sure it does, it pulls more revs than my GTI.

Reply #65July 19, 2010, 03:51:14 am

Robb

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Re: 2010 Edition of the Governor Mod
« Reply #65 on: July 19, 2010, 03:51:14 am »
Im a little confused by this, judging by this video bosch diesel ve governor

Its not until after 4000 revs that the main spring begins to govern the fuel?

Can someone please explain how just shimming the main spring changes the fueling lower down the rev range?

I can understand how adjusting the Intermediate spring would adjust the fueling below 4000 revs, but Ive heard you idle and all kind are messed up by adjusting the inter spring

Reply #66July 19, 2010, 08:37:39 am

8v-of-fury

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Re: 2010 Edition of the Governor Mod
« Reply #66 on: July 19, 2010, 08:37:39 am »
I just woke up, but if my brain is up and running yet.. If your seeing 4000 at the crank sprocket, are you not seeing only 2000 (approx. half) at the pump sprocket? Is he getting an accurate reading there by doing this? Is he showing 6000 crank rpms.. or 6000 pump rpms?

Reply #67July 19, 2010, 11:24:57 am

Robb

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Re: 2010 Edition of the Governor Mod
« Reply #67 on: July 19, 2010, 11:24:57 am »
Reading through the comment on youtube "Yes, half the crank speed, It's why you see two reflective band on the pulley to simulate crank RPM." Which would indicate that main spring is only governing at 4000+ rpm?

Im far from an expert in these pump and dont claim to have even near to knowledge of some people I just found this video interesting as it appears to indicate that the main springs is not restricting below 4000?

Also I believe that sort of test rig is reasonably accurate yes

Reply #68July 19, 2010, 11:46:26 am

theman53

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Re: 2010 Edition of the Governor Mod
« Reply #68 on: July 19, 2010, 11:46:26 am »
It isn't just above 4,000, but that is about where there is nothing left. It starts to cut around that 2,000 give or take some, but is pretty much no more fuel than that 2,000 point at the 4,000 point IIRC. If you do this mod you will see the difference. It is amazing. I turned the max fuel screw down as I didn't need it as much after the mod.
The spring is hard to watch with the Tach here, but if you do you will see it move a little at those rpms.

Reply #69July 19, 2010, 12:50:17 pm

Rabbit on Roids

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Re: 2010 Edition of the Governor Mod
« Reply #69 on: July 19, 2010, 12:50:17 pm »
gov mod does nothing for low end power really, it just gives full fueling at all rpms..

Reply #70July 20, 2010, 04:43:10 am

Robb

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Re: 2010 Edition of the Governor Mod
« Reply #70 on: July 20, 2010, 04:43:10 am »
I dont doubt the mod works, too many people have claimed the benefits for it not to work, I just dont understand how it can affect the fueling by only shimming the main spring when it looks as though it has almost zero, if not zero movement until over 4000 revs.

I could understand shimming the middle spring would alter the fueling below 4000 alot, however I believe this leads to rough idling and other such problems

Reply #71July 20, 2010, 08:04:37 am

theman53

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Re: 2010 Edition of the Governor Mod
« Reply #71 on: July 20, 2010, 08:04:37 am »
In that video it is very difficult to look at the spring and the tach. It is moving, but you don't really know when until you look down, by that time the tach may have jumped 1500 rpm. Also, it doesn't have to move but a .01 of an inch to cut fuel. Your eyes aren't that good. What you are saying is good in theory, but you just can't see it move the little bits like the other springs that are relatively easy to compress.
Shimming the intermedite spring leads to on/off switch in the intermediate rpms. It yeilds poor drivabiltiy. The idle spring I believe if you shim that it will give you erradic idle only controllable by the fueling screw IIRC.
If you can find a way to do it better that is what we are here for. As simple of an operation as the shim is though I will not be joining you on that voyage. I will just let you take that over.

Reply #72July 20, 2010, 10:19:28 am

Robb

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Re: 2010 Edition of the Governor Mod
« Reply #72 on: July 20, 2010, 10:19:28 am »
Im in no way trying to better what anyone has done or looking to start an argument saying anyone is wrong in what they say, just found the video interesting.

If you say the spring is moving below 4000 revs I will believe you agreed neither the video quality of my eyes are good enough to say otherwise.

Car goes for its MOT on thursday and will have the gov mod done by Friday morning anyway hehe

Reply #73July 20, 2010, 11:50:49 pm

rabbitman

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Re: 2010 Edition of the Governor Mod
« Reply #73 on: July 20, 2010, 11:50:49 pm »
I don't know if I'm seeing things or what but up to about 3000rpm I can see the intermediate spring compressing, then starting at about 4400rpm the main spring starts compressing and by 4700rpm it looks like it's fully compressed.
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I removed the turbo, made a toilet bowl 2.5" DP, the result....it was deafening. Now it has a homemade muffler up front and a thrush in the rear, the result.....less loud.
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Reply #74July 23, 2010, 11:29:10 am

Robb

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Re: 2010 Edition of the Governor Mod
« Reply #74 on: July 23, 2010, 11:29:10 am »
I have done this mod today, however somehow I had made a mistake.

I took the head off and shimmed the main spring, refitted the spring and moved the head about until it seated in position and bolted it up.

I then re-installed the spring assembly and everything bolted up fine.

Primed the pump, turned her over, but theres nothing coming out of any of the 4 injector lines.

If I remove the return pipe from the pump fuel is being pumped round and out the return, just nothing is going down the injector lines so obviously she wont fire up.

I was very careful to make sure I did not get dirt inside the pump, however something has gone wrong somewhere.

The wire is also still connected to the stop solenoid.

I had had the head on and off 3 times today and still no success getting fuel to the injectors with or without the shimms in, if it was dirt the chances of it blocking all 4 injector lines would but almost impossible no?

Is there something on the head I could be missing connecting up correctly that would cause this problem?

Im thinking its either something along those lines or I still have air trapped in the system somehow and need to find a way to get it all out, but dont know how too!

Im really stuck and need help ive tried all day but cant get anywhere.

Thanks
« Last Edit: July 23, 2010, 11:38:13 am by Robb »

 

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