wkdtime Posted April 4, 2007 Share Posted April 4, 2007 I have noticed that the guys over the pond when running a T67 size turbo with a stage 1 fuel system (720 cc's min. twin pumps and rail) on a stock motor keep the boost down to 18 psi (1.2 bar) on pump fuel (UK 97 ron equivelant) and 1.4 Bar plus on Race fuel. But over here we run most T67's with stock motors with stock rails and single pump's at 1.4 Bar with pump fuel. The reason i have brought this up is that i'm aware that a few members here who have'nt come forward have toasted there engines when running T67's at 1.4 Bar, at the moment this is purely hearsay but it's been spreading for a while. So is 1.4 Bar on stock internals with just about enough fuelling (rails, pumps, injectors) all that ok to run on a T67? Im aware that alot of factors can also limit the min or max boost and also the condition of the engine and all supporting mods but this is just purely a general question. Typical UK T67 set up (Basics) 720cc's injectors Single Walbro Stock fuel rail modded 1.4 Bar EMB min. Typical US Set up (Basics) 800cc Injectors, Twin intank walbro pumps -10 AN High flow fuel rail 1.2 Bar Map ECU min. Guys in the USA seem to adopt a 'Maybe Over kill' approach when it comes to fuelling (Pumps, lines, rails), and the guys here adopt an 'it's enough, we can mod that' approach. Discuss. Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted April 4, 2007 Share Posted April 4, 2007 Guys in the states also consider a 67 'Small'! I shall be running mine at a max of 1.4, but at 1.2 for normal use. Quote Link to comment Share on other sites More sharing options...
mkirby Posted April 4, 2007 Share Posted April 4, 2007 pump fuel in the usa is also not 97/98 ron its more like 90-92 ron so it will not allow for as much boost unless they increase the octane or as you say race fuel Quote Link to comment Share on other sites More sharing options...
wkdtime Posted April 4, 2007 Author Share Posted April 4, 2007 pump fuel in the usa is also not 97/98 ron its more like 90-92 ron so it will not allow for as much boost unless they increase the octane or as you say race fuel Are you sure about that? From what I understand their 92 Ron or watever it is, is the same octane level as our 97 Ron, they seem to calculate it a different way. Quote Link to comment Share on other sites More sharing options...
Ulrik Posted April 4, 2007 Share Posted April 4, 2007 Im running 780cc, with 2 walbro pumps, on my Greddy T78 Turbo (old school 67mm) 1,4 bar, soon with 264 cams and then boost around 1,6 bar // André Quote Link to comment Share on other sites More sharing options...
fishman Posted April 4, 2007 Share Posted April 4, 2007 pump fuel in the usa is also not 97/98 ron its more like 90-92 ron so it will not allow for as much boost unless they increase the octane or as you say race fuel I thought that aswell..... Quote Link to comment Share on other sites More sharing options...
Jake Posted April 4, 2007 Share Posted April 4, 2007 pump fuel in the usa is also not 97/98 ron its more like 90-92 ron so it will not allow for as much boost unless they increase the octane or as you say race fuel No that's the wrong way around. Our 98/99RON fuel is about the same as their shittiest fuel, 90/92 It's to do with them using MON ratings or somesuch, I forget the details ATM From what I understand there 92 Ron or watever it is, is the same octane level as our 97 Ron, they seem to calculate it a different way. Quote Link to comment Share on other sites More sharing options...
terribleturner Posted April 4, 2007 Share Posted April 4, 2007 pump fuel in the usa is also not 97/98 ron its more like 90-92 ron so it will not allow for as much boost unless they increase the octane or as you say race fuel Yeah that's what i was thinking too. As Rob says the 67 to them is small. I love reading about the cars on stock fuelling and internals running T88's and the like I stand corrected about the fuelling then Quote Link to comment Share on other sites More sharing options...
Wez Posted April 4, 2007 Share Posted April 4, 2007 I dont know of any toasted engines Quote Link to comment Share on other sites More sharing options...
JamieP Posted April 4, 2007 Share Posted April 4, 2007 If your engine is in good condition and you have a decent mapper i would think 1.4bar would be fine. Quote Link to comment Share on other sites More sharing options...
gaz1 Posted April 4, 2007 Share Posted April 4, 2007 If your engine is in good condition and you have a decent mapper i would think 1.4bar would be fine. good:D Quote Link to comment Share on other sites More sharing options...
Pig Posted April 4, 2007 Share Posted April 4, 2007 Just a quick one, dont most run twin pumps, even in the uk? Quote Link to comment Share on other sites More sharing options...
Homer Posted April 4, 2007 Share Posted April 4, 2007 Ian's been telling me 1.4 is pushing it a little on a T67 and stock block. He's mentioned several times now that I should stick to 1.2bar. The other thing of course is that 1.4bar is going to be a bit to powerful for 99% of road driving. Ian says he only ever used 1.4bar for 'silly stuff'. Driving around today at just 0.9bar was scary enough, arse end was all over the place in the first 3 gears! Damn these cars are quick Quote Link to comment Share on other sites More sharing options...
wkdtime Posted April 4, 2007 Author Share Posted April 4, 2007 Im gonna be running mine off the wategate until i get used to the power and then up it to 1.2 Bar where it will stay. Quote Link to comment Share on other sites More sharing options...
johnd-mkiv Posted April 4, 2007 Share Posted April 4, 2007 Driving around today at just 0.9bar was scary enough, arse end was all over the place in the first 3 gears! Damn these cars are quick cant wait Quote Link to comment Share on other sites More sharing options...
Alex Posted April 4, 2007 Share Posted April 4, 2007 You can run 1.4bar if you map properly for it, timing and fueling need to be carefully monitored. It's all about how good the mapper is. Quote Link to comment Share on other sites More sharing options...
Homer Posted April 4, 2007 Share Posted April 4, 2007 cant wait Same here, can't wait to get a proper map and see 1.2bar. Apparently the difference in power is enormous (180bhp more than I am at now ). I can't see how anyone would use more power on the road (at least not below 100mph!) Quote Link to comment Share on other sites More sharing options...
Homer Posted April 4, 2007 Share Posted April 4, 2007 You can run 1.4bar if you map properly for it, timing and fueling need to be carefully monitored. It's all about how good the mapper is. Ian seems to disagree on this point. It's confusing me slightly as he's been always talked about running 1.4bar on his car. Still, the power at 1.2bar will be more than enough for now and it will give time to get used to the huge torque (which is far greater and far sooner than BPU). I'm sure wkdtime will feel the same. There's always the option of more power further down the line if it gets boring Quote Link to comment Share on other sites More sharing options...
wkdtime Posted April 4, 2007 Author Share Posted April 4, 2007 Ian seems to disagree on this point. It's confusing me slightly as he's been always talked about running 1.4bar on his car. Still, the power at 1.2bar will be more than enough for now and it will give time to get used to the huge torque (which is far greater and far sooner than BPU). I'm sure wkdtime will feel the same. There's always the option of more power further down the line if it gets boring I hear you bud, 1.2 Bar and the T67 still kicks ya back in the seat with your kidneys firmly pushed to the back:D Guys in the states have been tuning Supra's long before we have here and most will only run 1.2 Bar on a T67 with stock internals on pump fuel with the same if not higher octane level than the fuel we have here in the UK. Quote Link to comment Share on other sites More sharing options...
Alex Posted April 4, 2007 Share Posted April 4, 2007 Ian seems to disagree on this point. It's confusing me slightly as he's been always talked about running 1.4bar on his car. Still, the power at 1.2bar will be more than enough for now and it will give time to get used to the huge torque (which is far greater and far sooner than BPU). I'm sure wkdtime will feel the same. There's always the option of more power further down the line if it gets boring I don't know what he's been telling you. I think you can...but it does need timing control and a decent amount of fuel to stave off det. Ian tends to err on the side of absolute caution, which is no bad thing. Quote Link to comment Share on other sites More sharing options...
ivan Posted April 4, 2007 Share Posted April 4, 2007 From another site: In most countries (including all of Europe and Australia) the 'headline' octane that would be shown on the pump is the RON: but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the "roaD Octane Number" or DON, or (R+M)/2. Because of the 10 point difference noted above this means that the octane in the United States will be about 5 points lower than the same fuel elsewhere: 87 octane fuel, the "normal" gasoline in the US and Canada, would be 92 in Europe. Quote Link to comment Share on other sites More sharing options...
Ulrik Posted April 5, 2007 Share Posted April 5, 2007 Ian's been telling me 1.4 is pushing it a little on a T67 and stock block. He's mentioned several times now that I should stick to 1.2bar. The other thing of course is that 1.4bar is going to be a bit to powerful for 99% of road driving. Ian says he only ever used 1.4bar for 'silly stuff'. Driving around today at just 0.9bar was scary enough, arse end was all over the place in the first 3 gears! Damn these cars are quick Wish i could get wheel spinn , in 3rd gear.....only in the 2 first... Stupid mapper.... // André Quote Link to comment Share on other sites More sharing options...
Nic Posted April 5, 2007 Share Posted April 5, 2007 Wish i could get wheel spinn , in 3rd gear.....only in the 2 first... Stupid mapper.... // André I wish I couldn't get wheel spin in 3rd gear! Need to get the RLTC sorted out, 1st and 2nd are almost impossible even on part throttle it just sits there and spins if I'm not careful feeding the power in. Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted April 5, 2007 Share Posted April 5, 2007 Guys in the USA seem to adopt a 'Maybe Over kill' approach when it comes to fuelling (Pumps, lines, rails), and the guys here adopt an 'it's enough, we can mod that' approach. I would say for safety's sake the overkill option would be the one I would adopt for reliability and peace of mind Quote Link to comment Share on other sites More sharing options...
Ulrik Posted April 5, 2007 Share Posted April 5, 2007 I wish I couldn't get wheel spin in 3rd gear! Need to get the RLTC sorted out, 1st and 2nd are almost impossible even on part throttle it just sits there and spins if I'm not careful feeding the power in. Maybe i should pay for your plane ticket to sweden, and you can map my car Or i send you my F-Con, and you map it for me...or your friends....hehe, since now im not happy at all....so far.. I will put my RLTC in , when the car is going like it should... Stupid Sweden, hardly anyone close that can map supras.. // André Quote Link to comment Share on other sites More sharing options...
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