hadyn Posted February 8, 2009 Share Posted February 8, 2009 Can you get an accurate dyno graph on a rolling road of a j-spec auto TT with the 112mph speed limiter still in place? Quote Link to comment Share on other sites More sharing options...
Jake Posted February 8, 2009 Share Posted February 8, 2009 So looking at it another way the question is: Is an auto TT doing less than 112pmh at its maximum power in 3rd gear. I don't think so. I reckon max power in 3rd is more than that speed. Quote Link to comment Share on other sites More sharing options...
hadyn Posted February 8, 2009 Author Share Posted February 8, 2009 So is it possible then that in 1993 on a japanese dyno in japan, that a stock j-spec TT would make less than the stated 280bhp on third party rollers?? Quote Link to comment Share on other sites More sharing options...
Jake Posted February 8, 2009 Share Posted February 8, 2009 Not sure what you're getting at, but yeah, that's always possible anyway, regardless of the 112mph limiter. Quote Link to comment Share on other sites More sharing options...
hadyn Posted February 8, 2009 Author Share Posted February 8, 2009 Anyone got any conclusive evidence that they can or cant get a full dyno with the 112mph limiter in place? Quote Link to comment Share on other sites More sharing options...
SteveR Posted February 8, 2009 Share Posted February 8, 2009 (edited) I think the main issue with not using the ideal gear is that you really want to dyno in the 'straight-through' gear, i.e. the one with a 1:1 ratio so that gearing and the extra drivetrain losses/torque gains that might come with using another gear don't affect the power/torque figures. Also, the car is more likely to break traction in a lower gear, so tie it down well! Edited February 8, 2009 by SteveR (see edit history) Quote Link to comment Share on other sites More sharing options...
SteveR Posted February 8, 2009 Share Posted February 8, 2009 I knew I'd seen this useful thread before - have a read. Quote Link to comment Share on other sites More sharing options...
snake Posted February 8, 2009 Share Posted February 8, 2009 Anyone got any conclusive evidence that they can or cant get a full dyno with the 112mph limiter in place? you can't get a full dyno. my bpu tt Auto supra topped out at 120 and did not get the full boost as it ran out of speed first. i found this out as i have a fault with my delimiter when it was on the RR. Previous to this fault it was fine the last time it was on the RR. Quote Link to comment Share on other sites More sharing options...
hadyn Posted February 8, 2009 Author Share Posted February 8, 2009 Cheers for that snake. How much power did you make before the limiter kicked in? Quote Link to comment Share on other sites More sharing options...
snake Posted February 8, 2009 Share Posted February 8, 2009 Cheers for that snake. How much power did you make before the limiter kicked in? I think it was around 390. I now have to find out what's wrong with the delimiter, it may be a loose wire or it may be fubar. To be honest i would not have known the delimiter had a fault,if it had not gone on the RR. Quote Link to comment Share on other sites More sharing options...
hadyn Posted February 8, 2009 Author Share Posted February 8, 2009 390 would do me!!! Quote Link to comment Share on other sites More sharing options...
snake Posted February 8, 2009 Share Posted February 8, 2009 I want more ,but have the short arms and deep pockets problem at the moment. Quote Link to comment Share on other sites More sharing options...
hadyn Posted March 6, 2009 Author Share Posted March 6, 2009 Spoke to a local dyno operator the other day in regards to this issue. He told me that as long as the supra autobox would hold gear until the redline then he could get an accurate dyno. He then went onto tell me he had a single Supra achieve over 500bhp with the limiter still in place as their was a loose connection to the aftermarket ecu or something... Quote Link to comment Share on other sites More sharing options...
snake Posted March 7, 2009 Share Posted March 7, 2009 I think that is the hard bit, to hold it in the right gear on the RR. Quote Link to comment Share on other sites More sharing options...
hadyn Posted March 7, 2009 Author Share Posted March 7, 2009 Last place I took my old BPU Supra to, couldnt stop it from kicking down... Quote Link to comment Share on other sites More sharing options...
Muffleman Posted March 7, 2009 Share Posted March 7, 2009 Last place I took my old BPU Supra to, couldnt stop it from kicking down... That is the problem, but put it in manual mode and you can accelerate gently, once the first turbo is properly into it's stride you can usually bury the throttle and it will hold to redline Quote Link to comment Share on other sites More sharing options...
hadyn Posted March 19, 2009 Author Share Posted March 19, 2009 Has anyone dyno'd an auto tt with the j-spec speed limiter still in place? What results did you get? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.