sr20det speed

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scottsnissan
Posts: 393
Joined: Wed Sep 15, 2004 1:06 pm
Car: 1995 240 sx se
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I have a s20det black top s13.Stock trans and rear end on S13 body.I was wonder since i ahve no speedo what speed should i be at in fifth gear.

EX.5th gear 3000rpm = speed ?And so on jus the primary nuber like 45 55 and 70 mph


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virus77
Posts: 1775
Joined: Thu Mar 25, 2004 9:43 am
Car: 95 S14, 71 240z, 97 e320

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it will be around 73 mph give or take a few. thats 3000ish in 5th gear. its the only one I remember off hand.

275/35/18 with J30 rear end. Ive tested my car against a radar and my speedo was pretty dead on.
Modified by virus77 at 4:02 PM 7/25/2005

scottsnissan
Posts: 393
Joined: Wed Sep 15, 2004 1:06 pm
Car: 1995 240 sx se
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wow then i have a prob. From having my lil bro driving beside me 3000 was around 65 mph i belive if not less. I guess me rear is starting to get bad.Or jus my transmission.

Re_Joshua
Posts: 48
Joined: Mon Jan 31, 2005 10:57 pm
Car: 1989 240sx hatchback (SR)
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Yeah me too, at around 3k im sitting around 60-65 mph....

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Turb0wned
Posts: 1114
Joined: Fri Jul 04, 2003 9:08 pm
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at 60 im at 2500... maybe the j30 lsd makes a difference... i dont know but i have one

Nismo_Freak
Posts: 10314
Joined: Wed Jul 24, 2002 10:42 pm
Car: 89 Nissan 240SX

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Tire diameters also play a role.

sr20detmaybe
Posts: 323
Joined: Wed Jun 01, 2005 4:34 pm
Car: 95 240sx

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WEll the j30 has a different gearing than the stock 240sx one so it will make some difference.

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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3.9 REAR END AND 205/50R15 TIRES, I CRUISE AT 3100RPMS AND THAT IS ROUGHLY 75MPH.

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ETTInnov04
Posts: 378
Joined: Fri Dec 03, 2004 4:38 am
Car: 1989 Nissan 240sx fastback

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I'm at about 70 at 3k. Drivetrain is as follows:Stock open diff.stock sr trans205/55/16 s14 wheels
Modified by ETTInnov04 at 12:26 PM 7/27/2005

scottsnissan
Posts: 393
Joined: Wed Sep 15, 2004 1:06 pm
Car: 1995 240 sx se
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Srry my tire size is 205/40/17.

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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http://www.geocities.com/z_design_studio/

SR TRANS RATIOS ARE....1: 3.3212: 1.9023: 1.3084: 15: .759

STOCK 240SX DIFF RATIO IS 4.08MY DIFF IS 3.9

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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BTW TYPING MY INFO INTO THAT CALCULATOR LEADS ME TO BELIEVE I NEED TO GET MY SPEEDO CALIBRATED.

scottsnissan
Posts: 393
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Car: 1995 240 sx se
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srry but the link is not working correctly

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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WHATS NOT WORKING?

scottsnissan
Posts: 393
Joined: Wed Sep 15, 2004 1:06 pm
Car: 1995 240 sx se
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When i click on it (the link u have posted)It shuts down all my eplore windows.So duno if its my end or not.

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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WHEN I CLICK ON IT, IT GOES THROUGH. LET ME TRY AND FIND A DIFFERENT ONE.

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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HERE IS A LITTLE BETTER ONE: http://www.f-body.org/gears/

JUST USE THE TRANS RATIOS I GAVE YOU, WITH WHATEVER TIRE SIZE AND REAR END (AXLE RATIO) YOU HAVE.

DrifterProdigy85
Posts: 1817
Joined: Sat Jul 02, 2005 7:42 pm
Car: 1989 Nissan 240sx (Zenki Onevia)

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70mph at 3000rpm sounds about right for me. Its crazy that the SR can go out to 170+mph.

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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Well that doesn't take into account for drag, friction, gravity, etc.

Re_Joshua
Posts: 48
Joined: Mon Jan 31, 2005 10:57 pm
Car: 1989 240sx hatchback (SR)
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Still it's a pretty cool little website. Now I know I really want a new rear end, hehe.

DrifterProdigy85
Posts: 1817
Joined: Sat Jul 02, 2005 7:42 pm
Car: 1989 Nissan 240sx (Zenki Onevia)

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Scott from Enthaply tuning has a 500+ rwhp SR that hes gone 180+ at over 8000rpm. Not sure of the exact numbers but its F'in crazy that he did it.

I plan on getting a 4.36 rear gear for my car to cut down on the top speed while gaining alot of acceleration.

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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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and less low end traction.

pgt892
Posts: 616
Joined: Wed Oct 30, 2002 4:34 pm
Car: 1997 240SX

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It's a little lit but I am around 70 at 3k in 5th. What are you guys at in 5th at 4k?

Re_Joshua
Posts: 48
Joined: Mon Jan 31, 2005 10:57 pm
Car: 1989 240sx hatchback (SR)
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Never really paid attention to the 4k mark...speed limits around all these back roads are 55mph...next time I take it out I'll let you know.


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