veilsideTT Posted May 26, 2006 Share Posted May 26, 2006 I will be running my auto with a manual diff soon and will be putting in a 3800 torque converter. On the standard converter these are what the gear ratio's will make Top Speed in 1 gear = 55.847 MPH And changes into 2 gear at 3822 RPM dropping 3178 RPM Top Speed in 2 gear = 102.283 MPH And changes into 3 gear at 4572 RPM dropping 2428 RPM Top Speed in 3 gear = 156.596 MPH And changes into 4 gear at 4935 RPM dropping 2065 RPM Top Speed in 4 gear = 222.122 MPH BUT, does anyone know how much MPH off each of these gears i will loose when i put in the 3800. Is it a massive amount like 15-20mph off each gear???? Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted May 26, 2006 Share Posted May 26, 2006 maybe ive missed something i just thought the higher torque convertor the higher the revs to pull away so at 6000rpm in first will still be doing same speed or am i wrong Link to comment Share on other sites More sharing options...
veilsideTT Posted May 26, 2006 Author Share Posted May 26, 2006 I know you loose MPH off each gear but i dont know quite how to put it into words why you loose it. Maybe someone will explain in detail why you loose MPH of your gears. And also explain how much you loose Link to comment Share on other sites More sharing options...
Gamer Posted May 26, 2006 Share Posted May 26, 2006 I have a 3800 TC in a BL built auto box and I don't think it makes me any slower mate. Then again the Corsa that raced me today did leave me in his dust so I guess your right... Honestly though, I think your worrying about something for nothing. Link to comment Share on other sites More sharing options...
CJ Posted May 26, 2006 Share Posted May 26, 2006 Link to comment Share on other sites More sharing options...
Bobbeh Posted May 26, 2006 Share Posted May 26, 2006 Sorry.. lose Link to comment Share on other sites More sharing options...
veilsideTT Posted May 26, 2006 Author Share Posted May 26, 2006 Wasnt that i was worring, was just interested really. But thanks for the Info dude. It must be just a very minimal loss that ive read about in the past then. Link to comment Share on other sites More sharing options...
MrRalphMan Posted May 26, 2006 Share Posted May 26, 2006 maybe ive missed something i just thought the higher torque convertor the higher the revs to pull away so at 6000rpm in first will still be doing same speed or am i wrong Your right, the gear ratios are not changing, just the point where the TC 'locks' up when pulling away. Link to comment Share on other sites More sharing options...
Miguel Posted May 26, 2006 Share Posted May 26, 2006 I dont think you loose any speed at the top end of the brackets ..You loose pull to a fashion under the stall point but as for car speed over the flash point you shouldn't in theory loose any as the TC has engaged and your gearing is the same . For example 70 mph at 4K RPM is still going to be 70 mph 4k RPM with a 3.8k stall as it is after that flash point. Well yours should be higher with the Manual diff. But as far as I'm aware speed is only affected before the flash point as its efectively sliping, Where you could cruise @ 2k on the motorway in top gear this will be a little different with a high stall , but then thats what the lock up switch is for. If anything you should hit them speeds faster as when you floor it the revs will hit the fash point at wich your more in the powerband so can accelarate faster. Wich is the point of a high stall. Thats my take on in anyway. Link to comment Share on other sites More sharing options...
veilsideTT Posted May 26, 2006 Author Share Posted May 26, 2006 So it just slips untill it gets to 3800rpm gaining the same speed it would have done at 3800rpm on the stock convertor? If that makes sense:d Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted May 26, 2006 Share Posted May 26, 2006 i dont believe....i answered a technical post.............right Link to comment Share on other sites More sharing options...
Miguel Posted May 26, 2006 Share Posted May 26, 2006 It's load dependant TBH, I'm sure some of the lads with HSTC can confirm that you can actualy tickle the car along under the stall point but as soon as any heavy load occurs she will shoot up and engage fully at the flash point. And when crusing you can lock it up anyway. Link to comment Share on other sites More sharing options...
veilsideTT Posted May 26, 2006 Author Share Posted May 26, 2006 Thanks all! Must find lock up switch install quide Link to comment Share on other sites More sharing options...
Miguel Posted May 26, 2006 Share Posted May 26, 2006 Abra cadabra http://www.utahracing.com/Tech/lockup/Lockup.htm Link to comment Share on other sites More sharing options...
veilsideTT Posted May 26, 2006 Author Share Posted May 26, 2006 Dont get it but i will research further. Many thanks all Link to comment Share on other sites More sharing options...
paul mac Posted May 26, 2006 Share Posted May 26, 2006 excellent MIG thanks for posting up the lock up i have a high stall ready to be shipped and was pondering this Link to comment Share on other sites More sharing options...
Miguel Posted May 26, 2006 Share Posted May 26, 2006 Can't take credit for it bud as I think it was Justin who put the link up before on here. But glad it helps anyway. Link to comment Share on other sites More sharing options...
Lucifer Posted May 27, 2006 Share Posted May 27, 2006 Not fitting a lock up switch will burn out your box / fluid very quickly. Its really a must with a hi-stall if you do millage. Link to comment Share on other sites More sharing options...
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