Instrument panel- wire connecting! help

gd2bwise · 05-05-2009, 04:17 PM

Hi

Was wondering if i could get some help? have replaced my 912 with a 71 911t engine, the guage are still the same -67 green face, fuel is connected only so far. Question is will the oil temp, tacho, speedo hook up? or will it need new senders etc?? or even yet new everything- tacho, speedo etc. I know that the redline is 6 instead of 7 which i should change, but i just need to know what will hook up and work and what wont with what was originally there.
Any pro or backyard experience is appreciated!

Thanks!

Jaems · 05-06-2009, 10:18 AM

You are better off to replace all the instruments to the 71 T. The sending units for the 912 will give a different reading for the engine. The oil pressure in the T engine will be higher than the 912. The tach will not work because it is calibrated for a 4 cylinder engine instead of a 6 cylinder. The original speedo is calibrated for a 901 transaxel instead of the 911. If you have left the 901 still in. It will be a little lower geared for the engine. You can have them sent off and recalibrated for the T engine.

You should also put the weights up front to balance the car. The handling will be off with the heavier engine in the rear. You might need stronger torsion bars in the front and rear. If you are not use to driving early 911's, be prepared for rear end to come around on you. That was why the weights were put in the early SWB 911's. That is also why the 912's were a better handling car than the early SWB 911's.

In closing you should probably be asking the "R" Group some of these type of questions. They will be more familiar with your conversion. Several have already done this before. good luck.

jmiemiec · 05-08-2009, 09:39 AM

I some time ago put a 2.7s into a 912. I can report the following:

* great hp/kg combination; car stands at 970 with 1/2 tank
* handling is fine (i put in SC real TB in), else unchanged.
* I have (or think to have) 912 gauges although from '68 (black0. The all seem to have been wired up to the 911 system without replacing the gauges. True about red-line, I kept the gauge but changed the rotor.

JM