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Club G40 Forum

Technical => Engine and Transmission => Topic started by: nikky on September 20, 2009, 11:43:21 AM

Title: help on buying a g40
Post by: nikky on September 20, 2009, 11:43:21 AM
hi guys
im looking at buying a w reg polo with a g40 lump in
think is its got smaller pulley(63mm i think.i have seen that these can blow seals so il get a 65mm if i buy it)
he says it runs but after 4k on boost it bogs down due to fuel(not getting much)would this be the chip oh its got g60 injectors too
il be doing to deal 2moro with my 106 gti
thanks all
Title: Re: help on buying a g40
Post by: cheddarcheese on September 20, 2009, 12:42:36 PM
how do you know its a fuelling issue?
Title: Re: help on buying a g40
Post by: DMWG40 on September 20, 2009, 01:16:27 PM
guess its the one advertised on here in for sale section
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 01:46:28 PM
im not sure if it is a fueling issue he says it it
its got g60 injectors and g40 chip he said and 63 pully

yeah its the one on here
Title: Re: help on buying a g40
Post by: hayesey on September 20, 2009, 07:39:54 PM
it will be running very lean if it's got g60 injectors and g40 injectors fuel map, amazing it hasn't melted a piston really. 

That will definitely be (one of?) the causes of the problem.
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 08:09:09 PM
just asked again and its g40 injectors and g60 chip(is that better than g60 injectors and g40 chip)
need to drive it home tooo
slow i think
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 08:15:28 PM
will jetta 1.8 injectors work ok??
cheers
Title: Re: help on buying a g40
Post by: Dan on September 20, 2009, 08:58:06 PM
No, I don't think they have enough capacity. I have a spare set of G60 injectors available. They are cleaned and tested, but are 290cc instead of 250cc. This may overfuel slightly but it's better to slightly overfuel than underfuel (as that causes damage).
Title: Re: help on buying a g40
Post by: hayesey on September 20, 2009, 09:01:10 PM
don't think my brain is working properly today.  What I said before is the wrong way round.  G60 injectors with a g40 injector map will cause over fuelling but g40 injectors with a g60 injector map will cause under fuelling which is running the risk of melting pistons.
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 09:06:45 PM
ahh so its no good lke that
would it drive ok if its slow ect
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 09:20:18 PM
ohh looking at flow rate now
what cc do i need approx as a mate has blue xe about 240cc
Title: Re: help on buying a g40
Post by: Dan on September 20, 2009, 09:22:07 PM
G60 injectors are 250cc per minute @ 3 Bar
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 09:34:28 PM
ok what are g40 ones i have looked but cant find it
so 250cc will work ok??lol
Title: Re: help on buying a g40
Post by: hayesey on September 20, 2009, 09:53:41 PM
g40 ones are 190cc if I remember correctly.
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 09:55:27 PM
tidy
il try and get 200-250cc ones before i drive home
Title: Re: help on buying a g40
Post by: hayesey on September 20, 2009, 10:18:55 PM
you need 250cc ones if the ECU map is to suit g60 250cc injectors, no others will work properly.  Similar size ones (+ or - maybe 10cc) you'd prob get away without damaging the engine but it's not ideal.
Title: Re: help on buying a g40
Post by: nikky on September 20, 2009, 10:37:10 PM
The ones il get are 241cc
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