Rb20 Box Into A R33

[mad082]

Ok, so i'm posting this up for a mate who is putting a natro 25 with a rb20 gearbox into a 33 for someone and has run into problems with the speedo. he is using a sr20 speedo sender and the speedo is reading double and is hitting the 180kmh speed cut at about 90kmh (i think the speedo is showing 180kmh as well, so he can essentially hit the speed cut near redline in 2nd gear or at mid revs in 3rd). does anyone know a way to fix this? reading through some other threads i saw something about a jaycar speedo corrector unit so will let him know about that, but i was just wondering if there was any other easier and possibly cheaper way to do it. does anyone know of possible senders that will work?

[mad082]

just in case anyone has an issue like this in the future, we sorted the problem. it was the s13 sensor causing the issue. changing to an s14 issue should solve the problem as it puts out half the pulses of the s13.

[What33]

So did that rb20 box last?

What tailshaft did you use?

Thinking about cheaping out and doing the same.

[GTSBoy]

The gearboxes are effectively the same part, so it would have lasted the same.