Billy Posted October 3, 2002 Share Posted October 3, 2002 Well I have finally done it. fitted my two cw down pipes and a blitz nur spec, hks boost gauge, and trl fuel cut defender to my j spec tt auto. taken it for a few fast runs with the nur spec baffle both in and out right up past five grand in top gear but I cant get the boost to go above 1 bar I have tried at all different times of day to see if air temp makes a difference but get the same result every time, bang on 1 bar I spoke to cw and he said he thought it should make about 1.1 to 1.2 bar ive cheeked all hoses etc but all seem ok just wondered if anyone on the board had had a similar result after doing a full de cat Billy Quote Link to comment Share on other sites More sharing options...
ChrisR Posted October 3, 2002 Share Posted October 3, 2002 Havent had mine done yet however you must have noticed a differnece in performance i.e. less lag/qicker spool up time. Regards Chris Quote Link to comment Share on other sites More sharing options...
Terminator Posted October 3, 2002 Share Posted October 3, 2002 Sounds a little low. I would check those hoses again especially the ones near the gauge input. Quote Link to comment Share on other sites More sharing options...
Billy Posted October 3, 2002 Author Share Posted October 3, 2002 i will check the gauge connections again tomorow the hosses are done up on the tee piece with cable ties is this ok or should i swap them for jubilee clips Quote Link to comment Share on other sites More sharing options...
Terminator Posted October 3, 2002 Share Posted October 3, 2002 I think cable ties can have a pinched high point on small diameter hoses, which could cause a leak. IMO A long shot but simple to check. Just take them off and run with out ties or clips to see if it makes a difference. Quote Link to comment Share on other sites More sharing options...
Billy Posted October 3, 2002 Author Share Posted October 3, 2002 that sounds possible ill take the ties off and try it.if there is any one else with a simular set up can you please post what boost you are making Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 3, 2002 Share Posted October 3, 2002 Originally posted by Billy Well I have finally done it. fitted my two cw down pipes and a blitz nur spec, hks boost gauge, and trl fuel cut defender to my j spec tt auto. taken it for a few fast runs with the nur spec baffle both in and out right up past five grand in top gear but I cant get the boost to go above 1 bar I have tried at all different times of day to see if air temp makes a difference but get the same result every time, bang on 1 bar I spoke to cw and he said he thought it should make about 1.1 to 1.2 bar ive cheeked all hoses etc but all seem ok just wondered if anyone on the board had had a similar result after doing a full de cat Billy Have you checked the boost against another gauge, in case the new one is faulty? Where are you measuring the pressure from Bill? Quote Link to comment Share on other sites More sharing options...
Billy Posted October 3, 2002 Author Share Posted October 3, 2002 Hi chris I'v got the gauge you supplied sitting in my garage. I whent to see Justin a couple of weeks ago, to get some clear front indicators, when i was there he showed me a nice new HKs mechanical boost gauge. (I could n't resist it) so his mecanic fitted it in place of the existing clock while i was there. Looking under the bonnet it would appear that he has teed it in to a black hose close to the bulk head on the throttle side of the car. It just does n't seem to boast above 1 bar no matter what the ambient air temp is. Not worried about this, just wondered if it was normal. Regards Billy Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 3, 2002 Share Posted October 3, 2002 Originally posted by Billy Hi chris I'v got the gauge you supplied sitting in my garage. I whent to see Justin a couple of weeks ago, to get some clear front indicators, when i was there he showed me a nice new HKs mechanical boost gauge. (I could n't resist it) so his mecanic fitted it in place of the existing clock while i was there. Looking under the bonnet it would appear that he has teed it in to a black hose close to the bulk head on the throttle side of the car. It just does n't seem to boast above 1 bar no matter what the ambient air temp is. Not worried about this, just wondered if it was normal. Regards Billy See if you can jury rig up my boost gauge to see if they agree on the boost figure, ideally T them together so they both indicate. You should try and run the gauges direct off the manifold plenum, after the throttle bodies. It may well be like that already, hard to say without looking or seeing a close up photo. I am still a little surprised it isn't showing more boost though. Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted October 3, 2002 Share Posted October 3, 2002 Hi Billy, have a look at the piccies on the link below to see where I've got mine fitted. I've got a Leon de-cat with a pretty much stock cat-back system and at the moment am getting about 16psi max. I've hit 18 on a good day. http://www.cargills.demon.co.uk/supra/mods.html#BoostGauge Quote Link to comment Share on other sites More sharing options...
Billy Posted October 3, 2002 Author Share Posted October 3, 2002 chris i will take a digital picture over the week end and email it to you so you can take a closer look if all else fails can i bring the car up to you for a check up Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 3, 2002 Share Posted October 3, 2002 Originally posted by Billy Well I have finally done it. fitted my two cw down pipes and a blitz nur spec, hks boost gauge, and trl fuel cut defender to my j spec tt auto. taken it for a few fast runs with the nur spec baffle both in and out right up past five grand in top gear but I cant get the boost to go above 1 bar I have tried at all different times of day to see if air temp makes a difference but get the same result every time, bang on 1 bar I spoke to cw and he said he thought it should make about 1.1 to 1.2 bar ive cheeked all hoses etc but all seem ok just wondered if anyone on the board had had a similar result after doing a full de cat Billy hi billy you have same set up as me blitz nur spec and both cw pipes and trl fuel cut i have a j spec auto too and hitting 1.2 - 1.3 with no problems i have the hks 60mm electronic boost gauge,it is plummed into the same place as yours too,will take a pic tommorow see if yours is same place as mine.got it on a t pipe its weird you got all same spec of parts as i have on my car hope ya get it sorted. mark Quote Link to comment Share on other sites More sharing options...
as5606 Posted October 4, 2002 Share Posted October 4, 2002 I am in a similar position to you with low boost even though I have a CW pipe and HKS front pipe (with FCD). (Chris - not spoken to you yet about this but want to finalise testing before I do) I run about 0.9bar most of the time although i haven't really taken it on a major test run yet (trying different temps etc). I was hoping for at least 1.2 on a cool day. CW installed the Cat removal pipes and the boost pipes ready for me to install a guage in the clock mount which is what I have done with no problems (apart from this of course). Maybe there is a leak similar to yours. Obviously the piping is correct (coz CW did it) but maybe its loose behind the guage. I will update after further testing Quote Link to comment Share on other sites More sharing options...
Suprash Posted October 5, 2002 Share Posted October 5, 2002 Guys, On you boost reading Im feeling a little pleased then, I have a CW down pipe on a HKS Hyper exhaust, with a fule cut defender and I have hit a max of 1.6 bar.... Quote Link to comment Share on other sites More sharing options...
Billy Posted October 5, 2002 Author Share Posted October 5, 2002 i have now cheked all the pipes for leaks and re piped the boost gauge it was teed into the vacume servo pipe i have now teed it in to were cw advised me to [thanks for all youre help chris] but still only hitting max 1 bar the car is only a weekend toy and has only done 20k miles i am now wondering if its just a matter of having a particularly good waste gate that is flowing enough to keep the boost down Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 5, 2002 Share Posted October 5, 2002 Originally posted by ashleywillis Guys, On you boost reading Im feeling a little pleased then, I have a CW down pipe on a HKS Hyper exhaust, with a fule cut defender and I have hit a max of 1.6 bar.... That's ludicrously high and needs reducing before it dets to destruction!! Quote Link to comment Share on other sites More sharing options...
Syed Shah Posted October 5, 2002 Share Posted October 5, 2002 Originally posted by ashleywillis Guys, On you boost reading Im feeling a little pleased then, I have a CW down pipe on a HKS Hyper exhaust, with a fule cut defender and I have hit a max of 1.6 bar.... Ouch! I would get that fixed quick, not good for the engine or the turbos! Quote Link to comment Share on other sites More sharing options...
GavinL Posted October 5, 2002 Share Posted October 5, 2002 Originally posted by ashleywillis Guys, On you boost reading Im feeling a little pleased then, I have a CW down pipe on a HKS Hyper exhaust, with a fule cut defender and I have hit a max of 1.6 bar.... Have you ever seen a melted piston...LOL Quote Link to comment Share on other sites More sharing options...
Nic Posted October 5, 2002 Share Posted October 5, 2002 The Nurspec and the ARC pipe I have fitted are both 80mm (3 inches) diameter piping, in comparison to some of the HKS pipes that are 95mm (3 1/2 inches) With the boost controller off I only get about 1.05bar max, could this have something to do with the slightly smaller pipe diameter? Quote Link to comment Share on other sites More sharing options...
Syed Shah Posted October 5, 2002 Share Posted October 5, 2002 Yes, the slightly smaller piping would help lower boost levels, by providing just a little more restriction to flow. A good exhaust for a j-spec, although that is reflected in the price. Quote Link to comment Share on other sites More sharing options...
Justin Posted October 5, 2002 Share Posted October 5, 2002 I have Blitz exhaust, HKS mid pipe and CW down pipe. My max has been 21.4 psi (1.45 bar). I have just taken delivery of a CW restrictor ring to get pressure down to a less potentially catastrophic level. I shall be fitting it real soon before my turbo blades exit through my exhaust! Quote Link to comment Share on other sites More sharing options...
Terminator Posted October 6, 2002 Share Posted October 6, 2002 I have exactly the same set up as Justin, but with a Hiper, same booost levles until a CW restrictor was fitted. Now 17.9 PSI is my max. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 6, 2002 Share Posted October 6, 2002 Originally posted by Nic The Nurspec and the ARC pipe I have fitted are both 80mm (3 inches) diameter piping, in comparison to some of the HKS pipes that are 95mm (3 1/2 inches) With the boost controller off I only get about 1.05bar max, could this have something to do with the slightly smaller pipe diameter? More probably the ARC system is more restrictive than some others. Did the new crank trigger fix your misfire? Quote Link to comment Share on other sites More sharing options...
Nic Posted October 7, 2002 Share Posted October 7, 2002 I was in Japan last week, so I'll find out later today when I give the garage a call, I'll let you know I how I get on. cheers Quote Link to comment Share on other sites More sharing options...
Suprash Posted October 19, 2002 Share Posted October 19, 2002 Originally posted by Chris Wilson That's ludicrously high and needs reducing before it dets to destruction!! Ok, I will put my hands up, have been reading the gauge slightly wrong, am hitting 1.2 bar, Chris.......views...!!! It was the spacing of each digit. Quote Link to comment Share on other sites More sharing options...
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