If I'm going to stick the 3800rpm spring in I want a tach to see where it revs to and where I need to stay to be safe.

 

summit autometer #2888

 

isspro makes one too. me and a guy over on tdr are experimenting with some surplus gauges that might turn out well. i'll let you know in a couple days.

 

Thanks. I bet by the time I buy all the gauges I will have spent more than I did on the truck itself.

 

ditto, i run it. works awsome. easy install too

jiMMy

 

well, i'll let you know where i got my $20 tach if you tell me the part # of that governor spring, mmmm,mmmmm.

dave

 

spring number for a first gen is --1-464-650-366.
this is a bosch number. It is a 3200 not a 3800 spring.
I installed it and adjusted my throttle all the way and I can rev to 3500.
From what I hear you can go to 4000 max so you should be safe, I rev mine all the time with no problem.
Have fun

 

I know, i know. I've been lazy. I'll grab the book and take a look.

 

Its a 3800rpm marine spring. If you adjust the gov screw way out you can get it to rev to almost 4500, but its a ballanced 3.6L.