Here is my problem;
My bus tops out at about 57mph on flat ground. I have a 91 Bluebird flat nose (TC2000) with a front mounted 5.9L cummins allison AT545 (I think)auto trans and 4.33 rear end.
I would like to adjust the governer or up the fuel pressure to gain crusing speed but since I dont have a tach on my bus so I dont know how far I can saftly go.
I've done some reserch and found some diesel tach's like this one.
I called jegs and autometer and they said this tach runns off the alternator and has to be calibrated, using eather a photo tach
or you can set the idle based on the factory base idle.
The guy at the local diesel preformance shop said he thought that wide open throttle would be close to the same in nutral as it would be topped out on the highway, so I could use a photo tach to monitor the top rpm while in stopped in nutral with wide open throttle. I found some photo tachs on ebay for about $45-50 shipped, but if i can get a permanent mounted tach for close to the same price (buying used off ebay or something) i'd rather go that route.
My question is this, has anyone added a tach to their diesel engine? If so what route did you take, which is most cost effective? I assume most skoolie owners look for the most cost effective way to do things like me, and hopefully maybe someone will have some insight on this for me.