Manic Posted June 11, 2004 Share Posted June 11, 2004 Jeez I read on another post here that the TT tops out at 168!! Is that normal for a standard TT. I have a Jap Spec N/A and and have bottled out at 130 mainly cos I guess you'd instantly lose your licence at that speed, last thing I want is to give up the chance to continue driving this fantastic car. I dont want to start a N/A vs TT thread but I find my N/A is a bit sluggish at lower speeds until the second cam lifts. Does the turbo's increase that low to mid range acceleration or is it for higher speeds. Just interested really. I'd like a UK leathered up TT but cant really afford the jump at the mo. Mines an L reg'd 100'000 miles machine in very good nick although no service history is available. Only gripe is on town driving im getting 250km's to a tank(yes km's). Matt Quote Link to comment Share on other sites More sharing options...
Barry Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Manic [b I dont want to start a N/A vs TT thread but I find my N/A is a bit sluggish at lower speeds until the second cam lifts.[/b] 2nd cam? It has 1 inlet and 1 exhaust cam, and they are both fixed. I can only imagine you mean VVTi, but I didn't think the N/A's had VVTi? The Gearboxes I think are gear'd for around 200mph from what I read somewhere!? Quote Link to comment Share on other sites More sharing options...
Manic Posted June 11, 2004 Author Share Posted June 11, 2004 2nd cam? It has 1 inlet and 1 exhaust cam, and they are both fixed. I can only imagine you mean VVTi, but I didn't think the N/A's had VVTi? Err well you live and learn gotta admit to knowing jack diddly squat about engines (well a bit, my old viva 1256 engine 20 yrs ago saw the brunt of my expertise:( ) I just assume it was twin cam as like the new vv type cars you accelarate then around 4500-5000 it kicks in? Please enlighten me. Quote Link to comment Share on other sites More sharing options...
carl0s Posted June 11, 2004 Share Posted June 11, 2004 The new (-ish) 1.8ltr VVTL-i (VVT with Lift) engine in the Celica 190/T-Sport has I believe a second cam profile which it switches over to at ~6,400rpm, and feels a bit like a turbo kicking in. That's not a supra though Quote Link to comment Share on other sites More sharing options...
geoffvalenti Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Barry 2nd cam? It has 1 inlet and 1 exhaust cam, and they are both fixed. Well hopefully they turn but the amount of lift is constant if that's what you mean Originally posted by Barry I can only imagine you mean VVTi, but I didn't think the N/A's had VVTi? Later N/As ('97 on) had VVTi, but its not really something you feel kick in. Quote Link to comment Share on other sites More sharing options...
Manic Posted June 11, 2004 Author Share Posted June 11, 2004 Does the turbo's increase that low to mid range acceleration or is it for higher speeds. Before the thread changes beyond all recognition just thought i'd re-iterate. Matt Quote Link to comment Share on other sites More sharing options...
Tom Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Manic Does the turbo's increase that low to mid range acceleration or is it for higher speeds. Yep both! Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted June 11, 2004 Share Posted June 11, 2004 The turbos are sequential on the TT (if standard) and they are designed to increase the torque and low down poer of the car. This means the torque curve is very smooth. What you are getting in your NA is the sweet spot of the engine where the torque starts to increase at a faster rate. Alot of NA cars do that, they don't get going until higher up the rev range. Its a slightly different principle (and engine design) but have a go in an Integra Type R. They screams up the rev range after about 5,000 RPM, but aren't all that impressive low down despite the VTEC technology. For your info, the first turbo on the TT comes in at around 2,000 RPM followed by the second (very noticably) at about 4,000 RPM. Go along to a local meet and I'm sure somebody will take you out in their P&J, maybe even let you have a go:eek: Quote Link to comment Share on other sites More sharing options...
Timwildman Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Steve W2 For your info, the first turbo on the TT comes in at around 2,000 RPM followed by the second (very noticably) at about 4,000 RPM. On the vvti twin turbos, the second cam profile is used to fill the gap between turbos, this just makes the second turbo comming on-line less noticable, but you still get the feel of extra pulling power, just no real kick. An even smoother torque curve. As for the cars top speed, well, I got 166mph on the speedo. This is mainly due to a problem with the auto box on vvti cars, they want to kick down at high speeds. I know there was still another 1000rpm to go when mine kicked down from 4th to 3rd, at 166mph. Others on the same trip to europe got 170mph on a standard car, and 177mph on a car with only exshaust, and intercooler. I dont think this was at top whack, just as fast as the bottle would take. I think the top gearing is for around 196mph:D Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Timwildman On the vvti twin turbos, the second cam profile is used to fill the gap between turbos, this just makes the second turbo comming on-line less noticable, but you still get the feel of extra pulling power, just no real kick. An even smoother torque curve. Not smooth enough for you to accelerate away from me though:D Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 11, 2004 Share Posted June 11, 2004 do i get a go in urs steve.....in straight line of course Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by whitesupraboy2 do i get a go in urs steve.....in straight line of course As in you driving? Thats quite funny! It was a joke wasn't it? Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Steve W2 As in you driving? Thats quite funny! It was a joke wasn't it? Quote Link to comment Share on other sites More sharing options...
attilauk Posted June 11, 2004 Share Posted June 11, 2004 i got 162 mph (on the speedo) out of mine on the M5 (3am no-one around, trac fuse out to bypass the limiter ) when i bottled, she was still pulling hard though:eek: Quote Link to comment Share on other sites More sharing options...
Jake Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Manic I just assume it was twin cam It is. I don't think Twin Cam is what you think it is though. A TC engine has one cam operating the intake valves and the other cam takes care of the exhaust valves. Quote Link to comment Share on other sites More sharing options...
Jake Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by attilauk i got 162 mph (on the speedo) out of mine on the M5 (3am no-one around, trac fuse out to bypass the limiter ) when i bottled, she was still pulling hard though:eek: Would it need the Trac Fuse out for that speed then? An indicated 162mph would be less than 150mph really, unless you've had the speedo calibrated of course. Quote Link to comment Share on other sites More sharing options...
carl0s Posted June 11, 2004 Share Posted June 11, 2004 well I'm not sure if I was able to go any faster, but i know the fastest I've had mine was an indicated 155mph. So perhaps the limiter (is it 155?) goes off the indicated speed, rather than actual? Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted June 11, 2004 Share Posted June 11, 2004 mine has been at 175 and still pulling hard. but chickened out Quote Link to comment Share on other sites More sharing options...
attilauk Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Jake Would it need the Trac Fuse out for that speed then? An indicated 162mph would be less than 150mph really, unless you've had the speedo calibrated of course. i thought the speed limiter works off the same speed signal as the speedometer so it should activate on indicated speed not actual. but im probably wrong:p Quote Link to comment Share on other sites More sharing options...
Aerotop Dave Posted June 11, 2004 Share Posted June 11, 2004 I've been 90 in mine Quote Link to comment Share on other sites More sharing options...
Zed Posted June 11, 2004 Share Posted June 11, 2004 I've had an indicated 175 when the limiter cut in, but i'm sure this was not the actual speed. I beleive the supra is quite bad for over-reading at high speed. Assuming the limiter cut in at an actual 155 then it was overreading by 25 mph which sounds like a very high margin of error indeed!! Quote Link to comment Share on other sites More sharing options...
millhouse Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Timwildman Others on the same trip to europe got 170mph on a standard car Thats me http://www.millhouse.cc/bbs/photos/millhouse/speed01.jpg Quote Link to comment Share on other sites More sharing options...
Soonto_HAS_soop Posted June 11, 2004 Share Posted June 11, 2004 Mines been up to 179 indicated and it was still going, but I had a corner coming up very fast, so had to ease off a little. Ben.. Quote Link to comment Share on other sites More sharing options...
Timwildman Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by millhouse Thats me http://www.millhouse.cc/bbs/photos/millhouse/speed01.jpg your speedo is diffrent to mine? http://homepage.ntlworld.com/timwildman/Nurburgring/RT25.jpg Quote Link to comment Share on other sites More sharing options...
millhouse Posted June 11, 2004 Share Posted June 11, 2004 Originally posted by Timwildman your speedo is diffrent to mine? http://homepage.ntlworld.com/timwildman/Nurburgring/RT25.jpg Yes, mines faster Quote Link to comment Share on other sites More sharing options...
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