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Model specific boards => Golf mk2 => Topic started by: dubslug on 02 August 2009, 10:36

Title: F.p.rs
Post by: dubslug on 02 August 2009, 10:36: Hi huys when i get my dub back i wanna sort out thr fueling issues, are there any bolt on up rated frps from other cars i could add to my 91 plate digi engine?? with out needing any mods??

cheers all
Title: Re: F.p.rs
Post by: fused on 02 August 2009, 16:37: not sure but doesn't the G60 one bolt straight on.....? is a high pressure oneer i'm sure.
Title: Re: F.p.rs
Post by: rubjonny on 03 August 2009, 10:02: g60 one is same as the normal mk2 one, its the injectors that differ. summut out of a porche or aftermarket is wat u want. are you going to get the ecu remapped to suit though, as just doing that on its own wont get you anywhere!
Title: Re: F.p.rs
Post by: danny_p on 03 August 2009, 11:23: you can fit a riseing rate FPR they help digi 2 engines, shoveing one in thats just a higher pressure is a bad idea it'll get more fuel EVERYWHERE thats awhat we did to TC's motor but it makes it run excessivly rich on cold start and it has caused a bit of a torque hole but it can be driven through and the coldstart / idel dosnt really matter as it's a track car, bad idea on a daily tho
Title: Re: F.p.rs
Post by: Diamond Hell on 03 August 2009, 12:50: Quote from: dubslug on 02 August 2009, 10:36
Hi huys when i get my dub back i wanna sort out thr fueling issues, are there any bolt on up rated frps from other cars i could add to my 91 plate digi engine?? with out needing any mods??

cheers all

What ARE 'the fueling issues'?
Title: Re: F.p.rs
Post by: dubslug on 04 August 2009, 17:28: it leans out at top end, was told uprating fpr would help, then been told to change injectors etc, so confused
Title: Re: F.p.rs
Post by: Mew on 04 August 2009, 17:34: Quote from: dubslug on 04 August 2009, 17:28
it leans out at top end, was told uprating fpr would help, then been told to change injectors etc, so confused

Typical digifant characteristic isn't it?
Title: Re: F.p.rs
Post by: dubslug on 04 August 2009, 17:46: yeah but my engine is now running following specs

2.0l 2e bottom end
bvh from man in shed
stainless manifold
stainless exhaust
k&n panel filter

guys at rolling road say i can get more outta it if i sort fueling out
Title: Re: F.p.rs
Post by: Mew on 04 August 2009, 17:48: I just meant that they all do it incase you didn't know, rather than thinking yours alone has a problem :wink:
Title: Re: F.p.rs
Post by: DOA on 04 August 2009, 17:57: Neither of your suggested fixes are going to work properly, they will just make the mixtures wrong everywhere else (ie, where you actually use your engine), the real cure is a re-map though thats not a simple thing to do apparently. DannyP's suggestion might improve things a tad but its not the solution. Your only real option is to find someone to do you a custom chip or swap to a different injection setup though if you go the chip route Id wait till you put a better cam in there (Im assuming that since you didnt mention it you havent swapped the stock one out yet).
Title: Re: F.p.rs
Post by: dubslug on 04 August 2009, 17:59: mew iknow what u mean abt standard ones
doa, sorry i forgot to mention it has a 276 duration cam in there too
Title: Re: F.p.rs
Post by: Horney on 04 August 2009, 18:07: Custom map time I reckon mate, you got it back from the spray shop now?

Nick
Title: Re: F.p.rs
Post by: dubslug on 04 August 2009, 18:09: didnt think these could be re mapped???
nah still waiting so i wanna get bits for wens shes back
Title: Re: F.p.rs
Post by: Horney on 04 August 2009, 18:17: You have to get a stand alone ECU as far as I know. Megasquirt may be a good shout.

Nick
Title: Re: F.p.rs
Post by: DOA on 04 August 2009, 18:21: Megasquirt time then. Pretty easy to do on a digifant engine it seems as everythings there already and you can use the existing loom if you make an adaptor cable between the existing ECU plug and the megasquirt = bugger all wiring (see this site http://www.conrod.co.uk/msd8v.html for more info). Still have to map it but theres plenty of base maps you can work from ont net.
Title: Re: F.p.rs
Post by: danny_p on 04 August 2009, 19:20: you'll proably need diffrent injectors or a higher rate FPR anyway iirc as the std digi 2 injectors are a bit small
Title: Re: F.p.rs
Post by: Diamond Hell on 04 August 2009, 22:32: H'mmmmm, you'll need more than that to Megasquirt it effectively - what about a potentiometer on the throttlebody? You can pick one of those up off a 2E, but you'll have to check to see if it fits up to the PB manifold.

You also could *really* do with a triggerwheel, although I think Danny is planning on using the Hall sender on my 8V crossflow. If you want a proper triggwheel Omex can supply them and then you'll need it fitted up to the crank pulley and get a bracket to hold the sensor.

For a proper system you really need a wideband lambda and control box - completing the feedback loop on fueling.

I'll tell you what it's like when Danny's got mine sorted :wink:
Title: Re: F.p.rs
Post by: danny_p on 05 August 2009, 00:17: the throttel body you need is off a 16v automatic passat if you want to use oem parts.

as for the dizzy, thats more than likely going to be tempoary
Title: Re: F.p.rs
Post by: rubjonny on 05 August 2009, 08:57: as above chipping a digi ecu isnt really effective,m you can change the fuelling but thats it, ignition map cant be tweaked.
Watch out when buying TPS equipped tbody, ones that fit direct to digi 8v tend to be too tall and hit the fuel rail, mk3 tbody is a totally different shape so no good either.
heres a great site outlining megasquirting a digi with the existing distributor:
http://www.conrod.co.uk/msd8v.html