Things to check on a modified Bosch

[Ben Jay]

I've seen a pump on ebay for cheap. but doesnt come with injectors and lines.

I think he wants at least £50 for it.

However i've been speaking to some one who has a modifed pump with lines and injectors for about £70.

What would be the cheaper option?

What should i look out for on the modified pump?

[td_dan]

Buy the complete setup it will save a lot of hassle

[Mattcheese31]

Buy the complete setup it will save a lot of hassle

this . .^^^^^^ . .

[Ben Jay]

Buy the complete setup it will save a lot of hassle

this . .^^^^^^ . .

ok! lol

what should i be looking out for on the pump?

He said the gov mods been shimmed 0.5mm.

[zx_volcane]

same one from the seller with godawful feedback?

^think that one has been updated to say it includes injectors and lines.

[Ben Jay]

same one from the seller with godawful feedback?

^think that one has been updated to say it includes injectors and lines.

No its another one not through ebay. Looked at it but i cant afford to pay more then £80 for the whole set up

[Toby]

A 0.5mm shim on the gov seems a bit.... little?

[darrenjlobb]

0.5mm shim on the gov? Thats not going to increase the fuel cut by a huge number of rpms tbh, and is that the only thing thats been modified? Either way, the complete setup is going to be cheaper / alot less hassle in the long run provided hes not screwed the pump up...

[Ben Jay]

enless he means 5mm
im not clued up on what a gov mod actally is

[WiNgNuTz]

enless he means 5mm
im not clued up on what a gov mod actally is

Join the club mate, I feel like such a noob when it comes to modding fuel pumps/turbos.

[Toms306]

If I've understood it right, the governer stops fuel at a certain rpm to avoid engine damage (and fun....)....the gov mod allows it to keep fuelling so you get a bigger rev band. Someone correct me.if I'm wrong as I'm currently doing an assignment on VE systems.

[Toby]

If I've understood it right, the governer stops fuel at a certain rpm to avoid engine damage (and fun....)....the gov mod allows it to keep fuelling so you get a bigger rev band. Someone correct me.if I'm wrong as I'm currently doing an assignment on VE systems.

In principle, yes.

As engine rpm increases, centrifugal pressure is exerted against the governor. This then compresses the springs within the gov cradle, which in turn begins to limit the throughput of fuel within the pump..

When modifying the governor, a 'shim' is put into the main spring, which makes it much stiffer (some people even do solid). This means that when the same centrifugal pressure is applied at higher engine rpm, the governor resists this movement far more, and thus the fuelling is not decreased.

Why not just fit a stiffer spring instead of shimming the stock one I hear you say? Because finding one which would fit perfectly would be a pain.

There are other modifications which you can do to the governor assembly which Dan! and myself did to my pump, the credits of which I believe go to Dave (HA11). However these are top secret

[n0v0s]

^... Most of which are probably available from vwdiesel.net or elsewhere..!

People wanting to mod boschs for dturds need to read outside of these 306 forums where this 'knowledge' is kept secretive.

[Dave]

Haha hardly secret, just some parts have more travel than others, which can be found in different pumps. But your right, the internet is full of other places where the VE is applicable, and give much better/in depth info on modding. Seek and ye shall find.

[n0v0s]

Haha hardly secret, just some parts have more travel than others, which can be found in different pumps. But your right, the internet is full of other places where the VE is applicable, and give much better/in depth info on modding. Seek and ye shall find.

Relatively secret/quiet is more apt i suppose

I don't think it's a bad thing though, as i think it's important people learn how the pump works then apply mods knowing wtf they are actually doing and why.. rather than being told do x y z. More fun!

[Dave]

Yeh exactly people should not be confined to this forum while learning how VE's work, if they do their research elsewhere, would realise that its not really secretive at all.... so its laziness in some ways...

[Ben Jay]

Right my pump arrived! Is there any thing I should do to it before I put it in the car? Any bits that should be serviced or looked at? Also Ill have to check what the gov mod actully is!

[Ben Jay]

Any one?

[Diggers]

If I've understood it right, the governer stops fuel at a certain rpm to avoid engine damage (and fun....)....the gov mod allows it to keep fuelling so you get a bigger rev band. Someone correct me.if I'm wrong as I'm currently doing an assignment on VE systems.

In principle, yes.

As engine rpm increases, centrifugal pressure is exerted against the governor. This then compresses the springs within the gov cradle, which in turn begins to limit the throughput of fuel within the pump..

When modifying the governor, a 'shim' is put into the main spring, which makes it much stiffer (some people even do solid). This means that when the same centrifugal pressure is applied at higher engine rpm, the governor resists this movement far more, and thus the fuelling is not decreased.

Why not just fit a stiffer spring instead of shimming the stock one I hear you say? Because finding one which would fit perfectly would be a pain.

There are other modifications which you can do to the governor assembly which Dan! and myself did to my pump, the credits of which I believe go to Dave (HA11). However these are top secret

Was that the tranny throttle/gov arm and cradle and gov you used? Slightly bigger isn't it

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[Dan!]

Just the transit cradle. Throttle arm and gov assembly wouldn't work/give any benefit from what I could see!