monkey3 Posted May 9, 2006 Share Posted May 9, 2006 Just got my double decat and the restrictor ring. I also got a couple of gaskets, one for either end of the second (long) decat. Do I need to use them? Or some paste? What about the restrictor ring? Do I need one either side of that? what about the top of the front decat? Also, I should be ok running stock plugs, yay or nay? Or would I be better off with Denso IK22's? Alllssssooo, Is it possible/likely/definate that I will need a walbro? (I have an AEM wideband, so once it's fitted, I'll know if it's starting to run lean) Thank you all most graciously for your help and infinate wisdom in this matter. Link to comment Share on other sites More sharing options...
bonus_2000 Posted May 9, 2006 Share Posted May 9, 2006 Don't know much about this, but I am at the same sort of stage that you are, and I have been advised by Matt Harwood to put an uprated fuel pump in. Link to comment Share on other sites More sharing options...
monkey3 Posted May 9, 2006 Author Share Posted May 9, 2006 OK, so walbro on its way. What about an fpr? Link to comment Share on other sites More sharing options...
bonus_2000 Posted May 9, 2006 Share Posted May 9, 2006 Don't really know much about the plug situation, but haven't been told to change mine, so assuming not. Have been told it might be an advantage to have a set of bigger injectors, like the UK ones, but I suppose it all depends on what power you are going for. I have a set of 550cc for mine I am going to fit. You only need one restrictor ring as far as i know and it gets fitted right at the top of the first decat pipe from the manifold. When i do mine i think I am going to just paste it up, no real problems with doing that as there won't be a Cat. Have you thought about getting a adjustable boost controller? Link to comment Share on other sites More sharing options...
monkey3 Posted May 9, 2006 Author Share Posted May 9, 2006 The restrictor ring I have wont go on the manifold side of the first decat pipe that I have. With the parts I have the exhaust will go something like this: 1. downpipe 2. gasket ? or paste ? 3. 1st decat pipe 4. gasket ? or paste ? 5. restrictor ring 6. gasket ? or paste ? 7. 2nd decat pipe (long one) 8. gasket ? or paste ? 9. rest of exhaust I already have a boost controller fitted, but I wont really be using it - other than as a boost gauge - as I don't really want to up the boost beyond what the restrictor ring reels it in to (probably ~1.2 bar). I think for now I wont bother with bigger injectors as the j-spec ones should be able to provide enough fuel for 1.2 bar. Link to comment Share on other sites More sharing options...
monkey3 Posted May 9, 2006 Author Share Posted May 9, 2006 Link to comment Share on other sites More sharing options...
merckx Posted May 9, 2006 Share Posted May 9, 2006 Fit the restrictor ring on one of the exhaust flanges , it's not important. Some of the exhaust paste stuff on either side works. The decat pipe where it goes onto the turbo elbow - use exhaust paste. Use the 2 gaskets and put them on either side of the decat pipe if they're the right ones and are a good fit, use some paste aswell if you have to. Link to comment Share on other sites More sharing options...
SimonB Posted May 9, 2006 Share Posted May 9, 2006 You should use gaskets between exhaust sections, they obviously seal the gap, but more than that they will stop the whole exhaust resonating. Don't bother with that paste, it's messy. Ideally you want the restrictor ring as far back as possible - you don't want hot exhaust gas being restricted close to the turbo or you'll get more back pressure on the turbo which will cause higher EGTs and more lag than otherwise. I don't think it's really going to matter if you use gaskets with the ring, you certainly don't need two, one would probably be a good idea. Link to comment Share on other sites More sharing options...
merckx Posted May 9, 2006 Share Posted May 9, 2006 Ideally you want the restrictor ring as far back as possible - you don't want hot exhaust gas being restricted close to the turbo or you'll get more back pressure on the turbo which will cause higher EGTs and more lag than otherwise. I advised this to someone a while back after reading it somewhere, I was told it wasn't necessary by quite a few on here. That's why I didn't mention it this time, it does appear to be sensible though if you've got a choice of position. Link to comment Share on other sites More sharing options...
monkey3 Posted May 10, 2006 Author Share Posted May 10, 2006 SimonB, merckx Excellent, thanx for that. Exactly what I wanted to hear. Did you both go for uprated plugs, as I have been told in the past for a BPU car a new set of standard ones would be fine? Bonus, are you intending on going big power soon, otherwise will bigger injectors not screw up the fueling unless you have a fuel controller? Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 10, 2006 Share Posted May 10, 2006 You MUST fit uprated (colder) plugs. Paste between first cat pipe and turbo elbow, being sure original sealing ring is removed and flanges are scraped spotlessly clean, gasket between 1 st and 2 nd pipes, gasket between second pipe and ring, paste between ring and rest of system, in case the flange on rest of system isn't ground flat, as it is on my pipes. Link to comment Share on other sites More sharing options...
monkey3 Posted May 10, 2006 Author Share Posted May 10, 2006 Thanks Chris, I will be fitting this all on thursday can't wait to put your hard work in to use. Will Denso IK22's be OK, as I want to try to keep the easy start of the warmer plug? Link to comment Share on other sites More sharing options...
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