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+--- Thread: Things to check on a modified Bosch (/showthread.php?tid=2313)
Things to check on a modified Bosch - Ben Jay - 20-03-2012
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?
Re: buying a modified Bosch - td_dan - 20-03-2012
Buy the complete setup it will save a lot of hassle
Re: buying a modified Bosch - Mattcheese31 - 20-03-2012
td_dan Wrote:Buy the complete setup it will save a lot of hasslethis . .^^^^^^ . .
Re: buying a modified Bosch - Ben Jay - 20-03-2012
Mattcheese31 Wrote:td_dan Wrote:Buy the complete setup it will save a lot of hasslethis . .^^^^^^ . .
ok! lol
what should i be looking out for on the pump?
He said the gov mods been shimmed 0.5mm.
Re: buying a modified Bosch - zx_volcane - 20-03-2012
same one from the seller with godawful feedback?
^think that one has been updated to say it includes injectors and lines.
Re: buying a modified Bosch - Ben Jay - 20-03-2012
zx_volcane Wrote: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
Re: buying a modified Bosch - Toby - 20-03-2012
A 0.5mm shim on the gov seems a bit.... little?
Re: buying a modified Bosch - darrenjlobb - 20-03-2012
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...
Re: buying a modified Bosch - Ben Jay - 20-03-2012
enless he means 5mm
im not clued up on what a gov mod actally is
Re: buying a modified Bosch - WiNgNuTz - 31-03-2012
Ben Jay Wrote: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.
Re: buying a modified Bosch - Toms306 - 31-03-2012
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.
Re: buying a modified Bosch - Toby - 31-03-2012
Toms306 Wrote: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
Re: buying a modified Bosch - n0v0s - 01-04-2012
^... 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.
Re: buying a modified Bosch - Dave - 01-04-2012
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.
Re: buying a modified Bosch - n0v0s - 01-04-2012
Dave Wrote: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!
Re: buying a modified Bosch - Dave - 01-04-2012
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...
Re: buying a modified Bosch - Ben Jay - 04-04-2012
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!
Re: Things to check on a modified Bosch - Ben Jay - 06-04-2012
Any one?
Re: Things to check on a modified Bosch - Diggers - 06-04-2012
Toby Wrote:Was that the tranny throttle/gov arm and cradle and gov you used? Slightly bigger isn't itToms306 Wrote: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
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Re: Things to check on a modified Bosch - Dan! - 06-04-2012
Just the transit cradle. Throttle arm and gov assembly wouldn't work/give any benefit from what I could see!