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if on a budget you could do away with the boost retarder and lock the dizzy set it with more initial advance and give it a go.. found out that doesnt work on positive displacement supercharging but turbo can work there are lots of big power scrapyard turbo conversions done like that.... maybe not ideal but works.. si Sorry mate being really thick, but what do you mean by locking the dizzy? And what exactly will it do? If you're still worried about det, you can always make a water injection set-up. There are plenty of site out there on the net to show you how. As for the 5th injector, I'd rob the cold start injector off a K-Jet equipped car like an Audi or something, and hook that up to a pressure switch (Hobbs switch I think they're called) I wouldn't lower the CR personally. I think to start off , running less than 1 bar of boost should be enough work to keep you busy and enough power to keep you laughing. Once you've sussed all the fuelling / ignition / whatever and are hungry for more boost, then go looking for decompression plates / Cossie internals or whatever. I just think that starting off with a stock motor gives you more time to work on the turbo side of things rather than having to do engine work before you even start on the hairdryer. JM2P Water injection seems like a good idea, if I can bodge one up my self and run it off the pressure switch for the 5 injector I may well give it a go. As for what injector I am going to use for the 5th/6th one. I’ve got a set of standard “yellow” Cosworth injectors, which should be more than up to the job. I am in a real head spin about cr. there are soooo many options it does my head in! But I am leaning towards keeping the cr. standard and using a copper head gasket.
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Last Edit: Mar 15, 2008 0:10:57 GMT by Robinxr4i
Sierra - here we go again! He has an illness, it's not his fault.
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If you're gonna use a copper HG (£££££ due to metal prices), I think it'd be best to look into the ideal CR before you lay out the cash. Otherwise I'd just leave the cylinder head exactly where it is, with the same HG as you have on it already (if it's good). I'm unfamiliar with the Pinto EFI, but if it has a cold start injector / 5th injector already, then I'm sure you can get that to run on boost as well as when cold. However, if you have a complex ECU that uses o2 sensors etc, chucking in a load more fuel manually is gonna send its little silicon brain berzerk and I think you'd be far better off fitting bigger injectors / remapping. Like I said, I don't know Ford EFi so don't know if it's a simple brain or a complex gas-analysing, nuclear-missile-launching, steven-hawking-pwning supercomputer.
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Mar 15, 2008 14:18:23 GMT
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To be honest i would keep the 9.2 as well and run 1 bar, then performance and economy are ok off boost and on boost the performance is significantly improved but not too far into in gearbox, diff, tyre killin territory - but thats me. The tranny pinto is 8.2:1 so would allow big boost for big power.
my tranny pinto is now on ebay.
The EFi system is a very basic one, its a flap valve MAF sensor - the spring pressure is normally adjustable in these, no lambda so no closed loop to confuse and the fuel pressure regulator looks to be adjustable and is dependent on manifold pressure (good for boosted setups i suppose) so for a cheap setup its proly the way to go, no fifth injector though. I'm gonna get mine set up on a rolling road to get the most out of the mild mods there do seem to be places familiar enough with this system to get the best from it, loads of kit cars run it.
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Mar 15, 2008 17:59:07 GMT
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I'm unfamiliar with the Pinto EFI, but if it has a cold start injector / 5th injector already, then I'm sure you can get that to run on boost as well as when cold. However, if you have a complex ECU that uses o2 sensors etc, chucking in a load more fuel manually is gonna send its little silicon brain berzerk and I think you'd be far better off fitting bigger injectors / remapping. Like I said, I don't know Ford EFi so don't know if it's a simple brain or a complex gas-analysing, nuclear-missile-launching, steven-hawking-pwning supercomputer. As trannyman says the EFi system on the pinto is very basic compared to modern stuff. No lambda (or hego as ford called it), no cat , no map sensor, non-sequential injection, electronic dizzy with a vane style MAF meter. So throwing extra fuel in aint going to pwn it ;D I had thought about using the "yellow" injector inplace of the standard injectors, but I am not sure how the ECU could be modified to measure/register boost? If anyone know if and how it could be done let me know!
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Sierra - here we go again! He has an illness, it's not his fault.
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Mar 15, 2008 18:08:12 GMT
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As far as I know, there isn't any way to modify the stock ECU to accept boost, and I think a mappable ECU would be the only way to do this.
You could have a 5th injector rigged up to a pressure switch to lob in more fuel on boost. If there's no exhaust sensing going on then the ECU should be none the wiser.
Bigger injectors would make it run better on boost, but off it it might run awful rich. The ECU will stick to the same pulse width as it won't "know" they're bigger injectors. So you'll just get more fuel thrown in all the time - which isn't really what you want! ;D If you had a lumpy cam and all sorts of other goodies to warrant needing more fuel then I'd say it was worth fitting the bigger injectors, but as it is I think it'd run rough until you get on boost.
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Last Edit: Mar 15, 2008 18:08:52 GMT by BenzBoy
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Mar 15, 2008 18:33:47 GMT
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The air flow meter would go infront of the turbo, meaning all the air that flows will be measured, you can alter the spring that holds the flap so that it measures differently, you can also run a boost regulated FPR and bigger injectors. All of the above will enable you to run boost with your stock ECU, it wil just take a bit of tuning thats all
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