Guest milllane Posted October 27, 2007 Share Posted October 27, 2007 Hi, I`d like to give my input on this, I work on a customers TT auto who tells me what he wants me to do after reading up on websites etc, as it is I have done the following :- True Twin Conversion vacuum way. Manual boost controller Boost guage Fuel cut defender HKS Full turbo back Blue flame exhaust, no restrictor rings Custom induction kit made by me Uprated fuel pump Denso iridium plugs Ok it was running rough a few weeks ago and in the end I got it down to the new plugs being gapped wrong, adjusted the gap and perfect running, best its ever been in the 2 years I`ve looked after it. I booked it in for a rolling road session at Triton Motorsport and it produced 342 rwhp @ 15psi which I thought was pretty good and the guys there said the fuelling etc was spot on and it needed no other work. The back turbo has rattled for approx 12 months, the boost controller lets it run upto the end of the boost guage @ 20psi with no ill effects and this is how it is set everyday. He drives it hard and does regular track days, never misses a beat and never any problems. Just my take on the true twin setup. Quote Link to comment Share on other sites More sharing options...
tDR Posted October 27, 2007 Share Posted October 27, 2007 From someone that gaps iridium plugs that doesn't inspire me with confidence. TTC with a bleed valve and no ECU mapping is a real hack job IMO - much better off running sequential the way Toyota intended. Quote Link to comment Share on other sites More sharing options...
mattysupra Posted October 27, 2007 Author Share Posted October 27, 2007 Well thanks for the replies everyone. I think i will leave it alone as I'm to scared of melting valves again I was worried about fuelling and it seems others are to. I guess on a stock or mildly modified supra you may be o.k but mine is far from stock and guess i shouldn't be messing with what seems a good reliable set up (11.9 quarter ) Thanks for all the info. Quote Link to comment Share on other sites More sharing options...
Steve Posted October 27, 2007 Share Posted October 27, 2007 Hi, I`d like to give my input on this, I work on a customers TT auto who tells me what he wants me to do after reading up on websites etc, as it is I have done the following :- True Twin Conversion vacuum way. Manual boost controller Boost guage Fuel cut defender HKS Full turbo back Blue flame exhaust, no restrictor rings Custom induction kit made by me Uprated fuel pump Denso iridium plugs Ok it was running rough a few weeks ago and in the end I got it down to the new plugs being gapped wrong, adjusted the gap and perfect running, best its ever been in the 2 years I`ve looked after it. I booked it in for a rolling road session at Triton Motorsport and it produced 342 rwhp @ 15psi which I thought was pretty good and the guys there said the fuelling etc was spot on and it needed no other work. The back turbo has rattled for approx 12 months, the boost controller lets it run upto the end of the boost guage @ 20psi with no ill effects and this is how it is set everyday. He drives it hard and does regular track days, never misses a beat and never any problems. Just my take on the true twin setup. So you are saying that you gapped the iridium plugs? Quote Link to comment Share on other sites More sharing options...
Guest milllane Posted October 27, 2007 Share Posted October 27, 2007 Well yes and no, Triton Motorsport did it for me, out of the boxes the plug gaps were way out, why whats the issue with that? I didn`t post to be told I am doing hack jobs either, as I said in the first place I do what the customer asks as I do not profess to be a jap expert! Quote Link to comment Share on other sites More sharing options...
Guest milllane Posted October 27, 2007 Share Posted October 27, 2007 From someone that gaps iridium plugs that doesn't inspire me with confidence. TTC with a bleed valve and no ECU mapping is a real hack job IMO - much better off running sequential the way Toyota intended. So whilst I appreciate what your saying and yes it were my own I`d do it properly, how do you justify that the fuelling etc was apparently spot on? Quote Link to comment Share on other sites More sharing options...
tDR Posted October 28, 2007 Share Posted October 28, 2007 It won't have been - they're talking out their arse. In my humble opinion! For info, that set of iridium plugs you gapped are now at risk of breaking up and destroying your customer's engine. They come pre-gapped and yes it is supposed to be a very small gap - NOT the 1.1mm standard gap that Toyota specify. Quote Link to comment Share on other sites More sharing options...
Guest milllane Posted October 28, 2007 Share Posted October 28, 2007 But the car would not run properly with the gap they had so what are you supposed to do? Also it suprises me because Triton Motorsport are Japanese specialists and have a great reputation. Quote Link to comment Share on other sites More sharing options...
tDR Posted October 28, 2007 Share Posted October 28, 2007 But the car would not run properly with the gap they had so what are you supposed to do? Also it suprises me because Triton Motorsport are Japanese specialists and have a great reputation. In that case they should know better. Is the owner on this forum? What were the gaps and what did they set them to? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 28, 2007 Share Posted October 28, 2007 There is no way the fuelling will be fine in TTC, it will have a weak spot as both turbos start to make boost and it will go just as pig rich as most BPUs at 1.0 BAR which i suspect may be the misfire problem, unless one of the iridiums is fooked already. Quote Link to comment Share on other sites More sharing options...
adam bell Posted October 28, 2007 Share Posted October 28, 2007 when i am putting my foot down you sometimes smell a woft of petrol so i guess its a possible over fuel. might get it on the rollers and get it checked out Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 28, 2007 Share Posted October 28, 2007 when i am putting my foot down you sometimes smell a woft of petrol so i guess its a possible over fuel. might get it on the rollers and get it checked out Just read your earlier post about you turbos not making boost until 4,000 RPM, thats not right, mine are making 1.3BAR by 3,500 RPM. Quote Link to comment Share on other sites More sharing options...
adam bell Posted October 28, 2007 Share Posted October 28, 2007 any ideas on what the problem might be Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 28, 2007 Share Posted October 28, 2007 any ideas on what the problem might be My advice would be if your happy to keep it that way, just wire open the EGCV and the IACV and un plug the VSVs also fit a boost controller that will help spool up, but having said that i would also fit an Emanage;) Quote Link to comment Share on other sites More sharing options...
adam bell Posted October 28, 2007 Share Posted October 28, 2007 i am looking to get a boost controller any suggestions on which one would be good Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 29, 2007 Share Posted October 29, 2007 There is no way the fuelling will be fine in TTC, it will have a weak spot as both turbos start to make boost and it will go just as pig rich as most BPUs at 1.0 BAR which i suspect may be the misfire problem, unless one of the iridiums is fooked already. Maybe regapping the iridiums is masking an issue, like a weak coil pack. If that is the case then the misfire will come back eventually. -Ian Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted October 29, 2007 Share Posted October 29, 2007 Ah yes weak coil packs, A whole bag full of trouble on their own. I think I need to replace all mine or find the one or two that have started making my idle really lumpy now its getting cold. Quote Link to comment Share on other sites More sharing options...
Suprash Posted November 8, 2007 Share Posted November 8, 2007 as I said in the first place I do what the customer asks as I do not profess to be a jap expert! This is a very worrying statement....... A mechanic that does what the customer asks for and not what he believes or knows is right......there are too many outfits that operate like this and when things go wrong, they usually come back with "well, its what you asked for".........just like No1 and his EFMIC....... Quote Link to comment Share on other sites More sharing options...
supra_surj Posted November 10, 2007 Share Posted November 10, 2007 OK guys i have a quick question. Was getting a bad misfire on 2nd turbo. everything seemed to be fine. Done this TTC mod and 2nd turbo runs fine. Now my question is that i know the fuelling and that will be out but will it 1) damage my engine? 2) will the fuelling be out by alot as its stock with all cats in etc.. I do have a boost controller, how would i need to set this up to stop boost spikes? Ok more than a quick question but any help is greatly appreciated. Surj Quote Link to comment Share on other sites More sharing options...
Suprash Posted November 12, 2007 Share Posted November 12, 2007 OK guys i have a quick question. Was getting a bad misfire on 2nd turbo. everything seemed to be fine. Done this TTC mod and 2nd turbo runs fine. Now my question is that i know the fuelling and that will be out but will it 1) damage my engine? 2) will the fuelling be out by alot as its stock with all cats in etc.. I do have a boost controller, how would i need to set this up to stop boost spikes? Ok more than a quick question but any help is greatly appreciated. Surj The fueling will only be out below 4k rpm, as then as far as the ECU is concerned there is no possibility of the no.2 turbo running, above 4k rpm everything is fine...... But even below 4k rpm, I dont think its so much you WILL ruin your engine, but your AFR's could be a bit risky......but as I said I ran with this mod for a while, no issues..... Quote Link to comment Share on other sites More sharing options...
supra_surj Posted November 12, 2007 Share Posted November 12, 2007 Nice one mate. I will be getting the bits i need to sort this but not until jan or feb. As i only use it weekends it should be ok. Thanks. Quote Link to comment Share on other sites More sharing options...
Sean1933 Posted November 12, 2007 Share Posted November 12, 2007 edit: wrong thread. Lol Quote Link to comment Share on other sites More sharing options...
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