sr20det speed

[scottsnissan]

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

[virus77]

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]

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]

Yeah me too, at around 3k im sitting around 60-65 mph....

[Turb0wned]

at 60 im at 2500... maybe the j30 lsd makes a difference... i dont know but i have one

[Nismo_Freak]

Tire diameters also play a role.

[sr20detmaybe]

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

[PROJECTRB240SX]

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

[ETTInnov04]

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]

Srry my tire size is 205/40/17.

[PROJECTRB240SX]

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

[PROJECTRB240SX]

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

[scottsnissan]

srry but the link is not working correctly

[PROJECTRB240SX]

WHATS NOT WORKING?

[scottsnissan]

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.

[PROJECTRB240SX]

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

[PROJECTRB240SX]

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]

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

[PROJECTRB240SX]

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

[Re_Joshua]

Still it's a pretty cool little website. Now I know I really want a new rear end, hehe.

[DrifterProdigy85]

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.

[PROJECTRB240SX]

and less low end traction.

[pgt892]

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]

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.