Building a S2 mk2 golf

[tuffty]

Hello chap, spoke to you at Pod today (black astra)
Was massively impressed with your car so i thought i'd have a look for a build thred for it, and now i'm just amazed by the work that's gone into it.
saw you run an 11.something? with a missfire, think it supprised a few people lol.
keep up the good work.

[geryS2]

Incredible job !! Seems really fun to drive !!! Superb !

[G60Rallye]

More awesome looking work fella! Your fabrication skills realy are superb!

[Jamo]

You know what, your bang on for giving it a go!

I've heard of the MR2 pump being used before, just wondered if you knew this was big enough from the off.

[gnutz2]

Excellent, is a 106 pump powerful enough?

I dont know, but i have a feeling i`m going to find out. Only cost me 40 quid so i suppose i could sell it for more than that on ebay.

I heard a merc A class pump works but this was the first one my mate found in the scrap yard.

[Jamo]

Excellent, is a 106 pump powerful enough?

[gnutz2]

I;ll update the story so far, as you may or may not know tyhe other manifold went pop in spectacular style and whan using nitrous a back fire can be nasty.

So i'm going to adapt the old manifold so that it fits under the bonnet, this has meant cutting and tilting the runners a bit and forming a round shape plenum which will cope with large backfires a lot better. I'm also going to fit a large safety pressure relief valve but i'm not sure how i'm going to do this yet.





you can probably wirk out from the picture that i took the power steering pump off and a electric unit from a peogot 106 has replaced it a bit lower down. It turns out the banjo bolt for the steering rack is the same thread on the peogot pump which makes things easy, the only difference is this pump only has one pressure outlet so i have to drill and tap into the top of steering rack banjo bolt so the hydraulic pipe for the brakes can sit on top of it like a piggyback.

[gnutz2]

It won't let me edit it for some reason, if the larger 5 take over above .2 bar why use 10 ? I'm guessing the required injectors to fuel it nicely what flood the engine at 1% dc ?

Certainly a different way of doing things but as you say it works.

IMO the reason for using a dual injector setup is nothing to do with using two injectors to maximise the fuel flow, because these days you can easily purchase a set of injectors more than capable of supplying enough fuel by themselves.

My idea was to get a better quality of air/fuel mixture into the engine by injecting the fuel further away from the port and maybe pull some heat out of the charge too, while still retaining the good atomisation and fuel economy from the standard s2 injectors.

[Jonnybravo]

It won't let me edit it for some reason, if the larger 5 take over above .2 bar why use 10 ? I'm guessing the required injectors to fuel it nicely what flood the engine at 1% dc ?

Certainly a different way of doing things but as you say it works.

[Jonnybravo]

Yes thats exactly what I meant, I see your point about the size of the fuel rails but I would prefer to have twin feeds, with 10 injectors its not like your demanding "that" much fuel but you can't monitor it and there is still a small chance a cylinder could lean out.

Clearly so far its working fine though

[gnutz2]

I assume you mean if i use all 10 injectors ot the same time that the pressure drop by the time the fuel got to the 10'th injector would be too much and cause varying AFR's from cylinder to cylinder.

On the setup you're refering to i am only using 5 injectors at any one time so the standard 330cc injectors are told to stop (by the DTA ecu), then the 680cc outboard's come in and it is a direct swap over at 0.2bar boost (guage pressure) so the setup is no different than running 5 injectors in one fuel rail.

But i dont see any broblem with running all 10 full time, if the fuel rails are large enough internal diameter to not cause a pressure drop from one end to the other.

[Jonnybravo]

I've just been looking through the pic above and one thing as got my attention, the fuel setup to the rail appears to flow into one rail, joins to the 2nd rail then the returns out of that one to the fpr ? Regardless of the bore of the hose or indeed the rail surely that is a very dodgy way of going around doing it ?

My apoligies if it has already been covered in the thread, I only ask as most of us are going for fuel into either end of the rail with a centre return, 2 -6 in and 1 -8 out.

Incar video is mental, what times has this car achieved so far ?

[Jamo]

The car weighs 1140kg without the driver.

Hoses are from pace here.

http://www.paceproducts.co.uk/public...ttings/pushlok

Thank you very much

[URQguy]

How do you like the hose? It kind of scares me to use it as it looks as if the hose will just come off. Any bad experience with them?

[gnutz2]

The car weighs 1140kg without the driver.

Hoses are from pace here.

http://www.paceproducts.co.uk/public_html/php/products_info.php?parent=10&productID=pacefittings/pushlok