What I noticed was when you mash it in first you had to shift before you thought it was going to blow. 2nd same, 3rd same. It would keep pulling as long as the rpms were still climbing. 4th and 5th usually were way over the speed limit and still pulled well, not quite as good as the lower gears.From what I gather the main spring compresses a little on low RPM, but mainly it is the higher RPMs that it affects. I never had a tach, but I am guessing about 2,500 the main spring starts to limit fuel and will continue until 4,800-5,300. Then I don't believe your engine will rev anymore because of lack of fuel. You should feel it when driving that you lose power even though the engine keeps spinning faster. When you mod it it will go until valve float...or at least that is what is sounded like to me.
yes above idle it is the intermediate spring doing much of the work...but you need it to. If you shim it or put a solid piece in it will cause driving issues. If you hold the pedal in one spot and the intermediate spring has a different load put on in *rolling hill for ex.* then your rpm will go up then down without moving the pedal at all. It feels like you don't have a direct connection to the car it does what it wants. I suspect the firmer the intermediate spring the worse it would be.MAIN SPRING FTW!!!
If you take the lever in both hands and pull it you'll see how it works, at WOT the 2 smaller are fully compressed anyway, shimming them makes no gain imo, only ruins part throttle and idle control.
...BTW your Bieber avatar is awesome.-Malone
and what about the resulst of removing the main and put something solid?
This pic any good? Theres loads more random pump part pics on my photobucket for anyone wanting to use them, 'del635'.Shimming the governor solid, messes up the lda? ie no smoke control?
No problems at all at part throttle at any load, the rpms do not hang at all either between gears. There is still travel in the main spring, cant remember exactly how much tbh maybe about a 1/4 of original and there is also much more tension, I thought this was needed for the lda otherwise there would be nothing for it to hold back on off boost. The cars pulls harder above 3k rpm at full throttle much different to the non shimmed lever where power just tailed away to nothing. I used to have the smaller spring shimmed as well there was no noticable power difference at full throttle and at part throttle it was hard work keeping the car at a constant speed, you had to constantly adjust the pedal back forward it was only after this did I really understand just what the governor is doing at all rpms/loads its not just a rev limiter. The one thing I dont like about the gov mod is the lack of no load speed limitation, eg I was trying to pull another car which was stuck in snow and when my wheels lost grip a quick blip of the pedal saw over 6k rpm! I cant let anyone drive my car either as it would take a matter of seconds to blow the engine to pieces but all in with a bit of sense it is an excellent mod for free hp.
good point about having no rev limit at all - and others driving your car...i guess it wouldnt be a huge job to wire a relay into the stop solenoid, trigerred by an electronic overspeed signal (either from tach or something else). cut fuel at specific rpm.....
The only thing I noticed was I had my pump a lot cleaner when opening. I know you cabbaged the pics, but it is worth noting that these pumps don't like much of anything in them that isn't burnable. I used at least one can of brake clean after hosing off the big stuff before opening.Other than that I think this thread FTW on the governor mod
I have another thread roughly about the same thing, and I was told that these engines will reach and sustain 5350 +/- 20 floored in neutral. These engines could run forever at 5300rpm, they are built like tanks.When shimming even small amounts of the main spring, such as the 1/4" results in fueling way higher in the rpm range.. if no shims on a stock pump and engine result in 5300rpm floored in neutral.. i think adding a 3/16" shim would make the governor react a lot better to pedal movement. Does anyone have a tach, and an engine that has been shimmed with a small shim on the main spring only? What was your maximum rpm achieved? This is something I definitely want to experiment with when i dig the diesel out in the spring.
Quote from: dts67 on January 28, 2010, 08:39:01 amThis pic any good? Theres loads more random pump part pics on my photobucket for anyone wanting to use them, 'del635'.Shimming the governor solid, messes up the lda? ie no smoke control? im about this far shimmed up too. (~3/16") i really cant tell any difference driving the car, other than it has alot more power and turns about 7000 rpms after the mod.it blew alot more blackness after the mod.
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