Darren Posted September 12, 2006 Share Posted September 12, 2006 LOL - I'm So you have no ring? Only the one on my arse! :d Quote Link to comment Share on other sites More sharing options...
Pete Posted September 12, 2006 Share Posted September 12, 2006 So with a 1.2 ring will the boost hit a maximum of 1.2 and no more Yes by reducing the exhaust gas flow and hence max spin of the turbo blades. Have you run yours in the cold without a ring Darren? Or just the summer. Only reason I ask is mine wouldn't go above 1.1 bar in the heat, but when it's cold will hit 1.2. (As you'd expect) Quote Link to comment Share on other sites More sharing options...
Guest Saxo Boy Posted September 12, 2006 Share Posted September 12, 2006 Soooooo, we're 90% sure a 1.2 ring is enough and there is no need for a boost controller. Any advances on that Is there a diagram that shows the component parts of the exhaust sytem so I can understand how many bits need replaced to achieve a full decat, etc. I'd probably just look to replace the whole system from the turbo(s) back. Is one of the cats a pre-cat or are they both south of the blowers? This has been a nightmare btw - most cars you can understand the basic issues with a night or reading but there are so many models and so many conflicting opinions with the Supra Quote Link to comment Share on other sites More sharing options...
Nic Posted September 12, 2006 Share Posted September 12, 2006 Both cats are in line after the turbos, here are pics, they are not VVTi ones but they are similar. Cats and decat pipes Quote Link to comment Share on other sites More sharing options...
Darren Posted September 12, 2006 Share Posted September 12, 2006 Have you run yours in the cold without a ring Darren? Or just the summer. Only reason I ask is mine wouldn't go above 1.1 bar in the heat, but when it's cold will hit 1.2. (As you'd expect) Yes I've run it in Summer and Winter still no boost creep. Behaves just like a UK. Quote Link to comment Share on other sites More sharing options...
Nick Posted September 13, 2006 Share Posted September 13, 2006 Now that I'm awake and in the office, I can jump into Pete and Darrens ring discussion When I first bought the car I had a 400quid Apexi boost controller fitted thinking this box of tricks would be the business. After it managed to loose it's settings a couple of times (long story) I got hacked off with it and replaced it with one of Chris Wilson's restrictor rings which limits boost to 1.2bar. I've had this in for a few years now and all is good. You need to keep an eye on things in winter, as it can rise to 1.3bar if it's a cold day. IMO a boost controller is not worth the time or money, just an expensive fancy box of tricks. Darren - Like Pete I also need a ring. I did a test without one on a cool day and hit 1.4bar I was one of the first people to modify a VVT-i and hit a few problems when it came to the FCD and the like. These problems are a thing of the past now, and I wouldn't be put off buying a VVT-i because it's different. Terry has one running a single, and very well from what I hear. I've also spoken to Chris on more than one occasion about a Motec, and the M800 can control the VVT-i. IMO, BPU on a VVT-i should just mean a double decat, exhaust, restrictor ring, FCD, boost gauge and plugs with an SMIC in good condition. Water injection is a nice addition too. This is quite cheap and easy to do and will give a nice increase in power. After that you're looking at a single turbo for any gains worth the effort, and an aftemarket ECU. That's when things start getting expensive... I've no idea how much power my car makes, and don't care. I have no faith in the accuracy in rolling road figures so don't bother with them. It goes as well as it can with the stock turbos, and that's good enough for me. Give Chris Wilson a call on 07971952084, he'll put you straight on what you will/won't need. By the way, you'll see off a M3 without any problems Quote Link to comment Share on other sites More sharing options...
Nick Posted September 13, 2006 Share Posted September 13, 2006 Also, don't bother with aftermarket intakes they're a waste of money on a car with stock turbos. Keep the standard airbox, you'll really notice the differene in the summer. Quote Link to comment Share on other sites More sharing options...
Darren Posted September 13, 2006 Share Posted September 13, 2006 Darren - Like Pete I also need a ring. I did a test without one on a cool day and hit 1.4bar Maybe im just lucky! Cos I def dont have one....... Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 13, 2006 Share Posted September 13, 2006 Maybe im just lucky! Cos I def dont have one....... Maybe your exhaust is quite restrictive then? Quote Link to comment Share on other sites More sharing options...
Guest Saxo Boy Posted September 13, 2006 Share Posted September 13, 2006 Are there any tuning companies (pref with an internet site) in the UK that sell all or most of these bits that I'd need so I can price them up? Quote Link to comment Share on other sites More sharing options...
dandan Posted September 13, 2006 Share Posted September 13, 2006 Two manual vvti's here and both have restrictor rings - and they need them just as much as my non vvti does. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 13, 2006 Share Posted September 13, 2006 Are there any tuning companies (pref with an internet site) in the UK that sell all or most of these bits that I'd need so I can price them up? I can supply, fit and set up all you need, but sadly my web site is poor as I spend all my time fixing and modding Supras.... See my sig if you would like to contact me. Thanks. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 13, 2006 Share Posted September 13, 2006 Chris installed all my VVTi BPU bits and knows Supras inside out. Ian even just drove down from Inverness on Sunday to leave his car with him for a day. Quote Link to comment Share on other sites More sharing options...
Guest Saxo Boy Posted September 13, 2006 Share Posted September 13, 2006 Where in the country are you based Chris? Quote Link to comment Share on other sites More sharing options...
merckx Posted September 13, 2006 Share Posted September 13, 2006 Where in the country are you based Chris? North Shropshire, a long way to travel but worth it. Quote Link to comment Share on other sites More sharing options...
Guest ldor1 Posted September 13, 2006 Share Posted September 13, 2006 I came from the southwest of Ireland to get Chris to do my VVTI and was very happy with the work he did. The total journey was 2000 Km. Quote Link to comment Share on other sites More sharing options...
Markie Posted September 13, 2006 Share Posted September 13, 2006 Whats the top out on power then on a VVT-i before having to worry about internals such as rods pistons etc? Quote Link to comment Share on other sites More sharing options...
dandan Posted September 13, 2006 Share Posted September 13, 2006 Same as a non vvti. Boils down to performance vs reliability. 1000bhp for dyno queens and one drag pass? 380bhp for near stock longevity? A sensible figure for an average enthusiast looking for semi long term reliability (with deep enough pockets to fund necessary servicing, maintenance and upkeep and potential to cope with a catastrophe) would probaly be 470-500 genuine bhp. Quote Link to comment Share on other sites More sharing options...
Darren Posted September 13, 2006 Share Posted September 13, 2006 Maybe your exhaust is quite restrictive then? I'm running a Blitz Nurspec and 2.5 inch decats. I never even hit 1 bar with the boost controller off. Quote Link to comment Share on other sites More sharing options...
Guest Saxo Boy Posted September 13, 2006 Share Posted September 13, 2006 There is another possibility Darren - maybe your boost gauge is lying Quote Link to comment Share on other sites More sharing options...
Darren Posted September 13, 2006 Share Posted September 13, 2006 There is another possibility Darren - maybe your boost gauge is lying Ive got two!! They cant both be lying and the car hasn't gone bang yet!!! Quote Link to comment Share on other sites More sharing options...
Keith C Posted September 13, 2006 Share Posted September 13, 2006 North Shropshire, a long way to travel but worth it. Absolutely, definitely, 100% true. The man Wilson knows his shit, and will give you a honest answer - even when it's one that you may not like. One of precisely 4 people who I trust to work on my car, and one of them's my Dad! Quote Link to comment Share on other sites More sharing options...
Guest Saxo Boy Posted September 13, 2006 Share Posted September 13, 2006 Every day I'm blown by twins LMAO I like that Quote Link to comment Share on other sites More sharing options...
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