Jake Posted July 26, 2006 Share Posted July 26, 2006 I finally got my car back from Tuning Japanese (yes, I know) today. The guy reckons he's mapped it to 1.8 bar on Optimax. Isn't that too much boost for our relatively poor quality UK fuel? I do have WI fitted but I'd rather not rely on it. (Full spec in my vbGarage here if it helps) Any thoughts? Quote Link to comment Share on other sites More sharing options...
JamieP Posted July 26, 2006 Share Posted July 26, 2006 I bet 1.8 bar is fun...there is a few people running that sort of boost on optimax... i think i read that paul wiffin runs 1.9bar on optimax Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2006 Author Share Posted July 26, 2006 Yeah it's fast but it's worrying me to death. I've turned it down for now. Quote Link to comment Share on other sites More sharing options...
Wez Posted July 26, 2006 Share Posted July 26, 2006 With the fueling and ignition setup properly it should be ok. Is your WI also injecting meths (50/50 mix), if so this would also help but as you say, would not want to rely on that always being available. Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted July 26, 2006 Share Posted July 26, 2006 no opinions on the optimax thing (sorry i cant be of any less help ) but i am glad you are going to TOTB, as id like to finally meet you Quote Link to comment Share on other sites More sharing options...
uk-rich Posted July 26, 2006 Share Posted July 26, 2006 i see you have the same ecu as me, it can be mapped at different boost levels i.e 1.4-1.6-1.8 etc. this can be done with the addition of a simple rotary switch. you could save the water injection(which can be controlled by the motec) for 1.8 bar Quote Link to comment Share on other sites More sharing options...
LeeT Posted July 26, 2006 Share Posted July 26, 2006 no opinions on the optimax thing (sorry i cant be of any less help ) but i am glad you are going to TOTB, as id like to finally meet you he's a miserable b*stard IRL:D Quote Link to comment Share on other sites More sharing options...
JamieP Posted July 26, 2006 Share Posted July 26, 2006 ive been running 1.7 bar for the past few months (mapped by tuning jap) and its been fine... and i drive my car very hard, lots of top speed runs. Ive just changed over to a AEM ecu.. its being mapped today and tomorrow by turbofits new mapper and im going for 1.8 bar:) Quote Link to comment Share on other sites More sharing options...
LeeT Posted July 26, 2006 Share Posted July 26, 2006 ive been running 1.7 bar for the past few months (mapped by tuning jap) and its been fine... and i drive my car very hard, lots of top speed runs. Ive just changed over to a AEM ecu.. its being mapped today and tomorrow by turbofits new mapper and im going for 1.8 bar:) 1.8 on a T88 will be mad:blink: Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted July 26, 2006 Share Posted July 26, 2006 1.8 on a T88 will be mad:blink: MAD & Jamie go together like cheese and ham Quote Link to comment Share on other sites More sharing options...
JamieP Posted July 26, 2006 Share Posted July 26, 2006 1.8 on a T88 will be mad:blink: I hope so... just need to blow it up now then i can go for a mega engine build:D Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 26, 2006 Share Posted July 26, 2006 Big turbo's like boost, but EGT's dont like a lack of timing. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2006 Author Share Posted July 26, 2006 My EGT probe is mounted about 2 inches after the turbo. What EGT is considered the safe limit with the probe in that position? Quote Link to comment Share on other sites More sharing options...
Simon Posted July 26, 2006 Share Posted July 26, 2006 If I read that right what you are measuring is an average egt from all of the cylinders. One might actually be running hotter than you are measuring. IIRC the best place would the the exhaust manifold by Number 6 pot. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 26, 2006 Share Posted July 26, 2006 That is a loaded question Jake. IMHO 1.8 is far too much boost for optimax and a stock compression ratio. To achieve this without detonation it would require the ignition timing to be severely retarded. This is counter productive, will increase thermal stresses and raise EGT's. Again IMHO, you are better off running reasonable boost say 1.4 bar, and more timing. This will give you a more efficient, durable set up. Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted July 26, 2006 Share Posted July 26, 2006 I do have WI fitted but I'd rather not rely on it. Any thoughts? where are the jets mounted...are they near the compressor and I take it one right near the throttle? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 26, 2006 Share Posted July 26, 2006 oh one more thing Jake, where is your turbo on it's compressor map @ 1.8bar. Is it still efficient? Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2006 Author Share Posted July 26, 2006 I don't know, Terry. I've never seen a compressor map for this turbo. It says on the PHR website it can run 29psi (2.0 bar) with the right fuelling. Quote Link to comment Share on other sites More sharing options...
LeeT Posted July 26, 2006 Share Posted July 26, 2006 I don't know, Terry. I've never seen a compressor map for this turbo. It says on the PHR website it can run 29psi (2.0 bar) with the right fuelling. surely that means race fuel though and not optimax Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 26, 2006 Share Posted July 26, 2006 I don't know, Terry. I've never seen a compressor map for this turbo. It says on the PHR website it can run 29psi (2.0 bar) with the right fuelling. yeah I am sure you can, for a dyno pull & 1/4m. Would just be interesting to see a map if one exists. Many of the smaller turbos arent happily in their efficiency island at higher boost pressures. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2006 Author Share Posted July 26, 2006 Who is the guy at PHR? Is that Jarrett? I'll try to get a compressor map from him. If I get one would you mind having a butcher's at it for me? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 26, 2006 Share Posted July 26, 2006 Who is the guy at PHR? Is that Jarrett? I'll try to get a compressor map from him. If I get one would you mind having a butcher's at it for me? Not at all mate. did they give you a print out @ 1.8 bar? Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2006 Author Share Posted July 26, 2006 Nope. Apparently their dyno broke today. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 26, 2006 Share Posted July 26, 2006 Nope. Apparently their dyno broke today. Jeez you are lucky, don't touch my car on Sunday please Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 27, 2006 Share Posted July 27, 2006 One more thing I forgot to mention Jake, Optimax does lose it's potency over time. Quote Link to comment Share on other sites More sharing options...
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