monkey3 Posted September 27, 2005 Share Posted September 27, 2005 If you have a boost controller, then surely you don't need a restrictor ring in the exhaust also? or am I just being ? Quote Link to comment Share on other sites More sharing options...
Kopite Posted September 27, 2005 Share Posted September 27, 2005 Boost controllers can't lower boost mate so you'd still been a ring Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted September 27, 2005 Share Posted September 27, 2005 If you have a boost controller, then surely you don't need a restrictor ring in the exhaust also? or am I just being ? if the stock CAts are both in place then no you will not need a restrictor ring, but I would'nt advise using a boost controller without dumping the CATS as you will make the turbos work against a much greater resistance, which will prob screw them quicker Quote Link to comment Share on other sites More sharing options...
monkey3 Posted September 27, 2005 Author Share Posted September 27, 2005 ok, here's the thing... I know my car's got a boost controller, and I'm pretty sure it's been de-catted (don't know for sure as I haven't had a look underneath it yet - I'll be seeing it again thursday). However, I'll need to take the exhaust apart to see if it's got a ring installed, wont I? So if a boost controller can't lower boost, what can it do? I thought it did exactly what it said on the tin. :dumbass: Quote Link to comment Share on other sites More sharing options...
Ian R Posted September 27, 2005 Share Posted September 27, 2005 ok, here's the thing... I know my car's got a boost controller, and I'm pretty sure it's been de-catted (don't know for sure as I haven't had a look underneath it yet - I'll be seeing it again thursday). However, I'll need to take the exhaust apart to see if it's got a ring installed, wont I? So if a boost controller can't lower boost, what can it do? I thought it did exactly what it said on the tin. :dumbass: Thats where the restrictor ring comes in you can restrict the boost with the ring and increase it with the boost controller Quote Link to comment Share on other sites More sharing options...
Kopite Posted September 27, 2005 Share Posted September 27, 2005 Boost controllers increase boost only. The restrictor ring limits boost to 1-1.2 bar depending on where it's from etc. Most j-spec BPU cars don't bother with a boost controller AFAIK, only if they wanna push 1.2 bar. A UK spec would need a boost controller because the wastegates bigger so the boost doesn't increase when decatted Quote Link to comment Share on other sites More sharing options...
Nic Posted September 27, 2005 Share Posted September 27, 2005 ok, here's the thing... I know my car's got a boost controller, and I'm pretty sure it's been de-catted (don't know for sure as I haven't had a look underneath it yet - I'll be seeing it again thursday). However, I'll need to take the exhaust apart to see if it's got a ring installed, wont I? So if a boost controller can't lower boost, what can it do? I thought it did exactly what it said on the tin. :dumbass: Do you know what max boost you running? Do you have a boost gauge fitted? The max you want to be running is 1.1-1.2bar. So simple thing would be to test drive the car and see what boost you're making (be careful if you see it going above 1.2bar) if it's less, say 0.9bar then a boost controller will help raise boost. If it is over 1.2 bar then you will need to fit a restrictor ring to reduce max boost level. If it is around 1.1-1.2bar then you don't need either. Quote Link to comment Share on other sites More sharing options...
Nic Posted September 27, 2005 Share Posted September 27, 2005 Oh and forgot the (what's wrong with me today ) if you do need a boost controller, pm me and I'll get you a good deal on one from here in HK Quote Link to comment Share on other sites More sharing options...
monkey3 Posted September 27, 2005 Author Share Posted September 27, 2005 nic, but it has already got an apexi boost controller, but it had to be taken out for the sva, however it should be back in for thursday and I will hopefully get to take it out again, so I'll check the max boost and let you know what it is. I'll also try to have a look to see exactly what other mods it has. is it possible to tell from the outside whether it has a restrictor ring? Quote Link to comment Share on other sites More sharing options...
Nic Posted September 27, 2005 Share Posted September 27, 2005 nic, but it has already got an apexi boost controller Sorry M speed reading tonight, too much Red Bull Quote Link to comment Share on other sites More sharing options...
Homer Posted September 27, 2005 Share Posted September 27, 2005 Everything everyone else said is correct, but just to add: You really should find out if you've got any cats in before fitting the boost controller, you don't want to end up with 1.2bar and the cats still there. Can you post any pics of the underside of the car and one looking down the turbo side of the engine bay? If you are considering raising boost beyond stock levels then make sure you do the other required mods too (I'm sure you're aware of this, but not everyone realises other mods are needed first!) is it possible to tell from the outside whether it has a restrictor ring? Not really, the restrictor ring would look like a gasket from the outside. Plus I've never heard of a Jap car coming over with one fitted. Quote Link to comment Share on other sites More sharing options...
Jake Posted September 27, 2005 Share Posted September 27, 2005 is it possible to tell from the outside whether it has a restrictor ring?Yes. If one is fitted you can see the edge of the 'ring' (Actually it's a flat plate with a hole in it not a ring) between the joint of two exhaust pipe sections. Quote Link to comment Share on other sites More sharing options...
Clarkey Posted September 27, 2005 Share Posted September 27, 2005 When I was BPU, I considered fitting a restrictor ring to limit boost to 1 Bar .. then using a Ebc to raise the boost between 1 Bar (minimum) and the 1.2 Bar maximum. Just never got around to doing it. I wish I'd done it now - having gone single. Quote Link to comment Share on other sites More sharing options...
Nic Posted September 27, 2005 Share Posted September 27, 2005 Pics of 2 CATs Quote Link to comment Share on other sites More sharing options...
Kopite Posted September 27, 2005 Share Posted September 27, 2005 Quote Link to comment Share on other sites More sharing options...
Clarkey Posted September 27, 2005 Share Posted September 27, 2005 Pics of 2 CATsWhoa! Number 3 foreground ... looks a vicious felixtcus domesticus .. Quote Link to comment Share on other sites More sharing options...
TrickTT Posted September 28, 2005 Share Posted September 28, 2005 When I was BPU, I considered fitting a restrictor ring to limit boost to 1 Bar .. then using a Ebc to raise the boost between 1 Bar (minimum) and the 1.2 Bar maximum. Just never got around to doing it. I wish I'd done it now - having gone single. I want to do this on mine - 1 bar for day to day use (easy on the turbos) and 1.2 bar for sport. Only problem is all the restrictor ring seem to be for 1.2 bar. I could probably make some if anyone knows what thickness the ring needs to be and what size hole? Quote Link to comment Share on other sites More sharing options...
Nic Posted September 28, 2005 Share Posted September 28, 2005 I want to do this on mine - 1 bar for day to day use (easy on the turbos) and 1.2 bar for sport. Only problem is all the restrictor ring seem to be for 1.2 bar. I could probably make some if anyone knows what thickness the ring needs to be and what size hole? Contact Chris Wilson, he should be able to supply you with one. Quote Link to comment Share on other sites More sharing options...
monkey3 Posted September 28, 2005 Author Share Posted September 28, 2005 OK, so other upgrades before increasing boost... I'm quite sure it has had the cats removed as it has a non-standard exhaust and a very deep throbby note, but I'll have a look tomorrow anyway. As far as boost gauges go, it has the standard one and doesn't a boost controller have one built in? btw I'm not actually intending on turning the boost up (or even coming on boost heavy at all) to begin with anyway a fuel cut defender will stop the car overboosting anyway wont it? (admittedley not something to rely on) And the spark plugs I'll have to check as well. Nic, thanx for the pics Homer, if someone has had a boost controller fitted and the cats removed isn't it more likely that they would have fitted a ring? (assuming they're not ) how bad would it be not to do this? I'll take some pics tomorrow when I go to see the car again. thanx for all your help guys. I don't wanna go blowing the car up the day I get it Quote Link to comment Share on other sites More sharing options...
CJ Posted September 28, 2005 Share Posted September 28, 2005 I still struggle with this restrictor ring thing. When my car was BPU, I had one of these things fitted and also had a TTC switch fitted. When I ran in TTC the boost went up to 1.5 bar and frightened me to death. I couldnt understand that as the BC wasn't set to anything like that so I put it down to peaking. I then decided to lower the BC and guess what? 1.5 bar! I then decided to turn the BC off completely and let the restrictor ring do its thing and guess what? Yes, 1.5 bar again. So, my question was / is, how the feck did that happen? If the BC is off and the restrictor ring set for 1.2 bar, how did I get to 1.5? At the time nobody could answer and the question just faded away. Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted September 28, 2005 Share Posted September 28, 2005 wastegate failing maybe ??? Quote Link to comment Share on other sites More sharing options...
CJ Posted September 28, 2005 Share Posted September 28, 2005 Turned TCC off and it didnt happen then and anyway, shouldn't t the restrictor ring have stopped that hapening? Quote Link to comment Share on other sites More sharing options...
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