So i got a 92 dodge d350 5 speed and i wanna make my gears long for i a higher top speed . What would be good gears to use.

 

I would say go with a set of 3.08 gears.

Assuming your tires are 235/85/16's, your rpm's would be 1632 at 65 mph. That would also give you a top speed of about 90 mph or 2260 rpm.

 

Have you done a gov spring, and removed your high idle screw? Mine used to top out around 85-90 now it will bury the speedo at 100mph and is easier highway driving. For $20 it's a well worth while mod if you haven't.

 

I moved everything, the top out throttle screw, turned up the pump all the way, and made a fuel pin, and moved my throttle cable towards the firewall to get more pull on the throttle lever on the injector pump and not sure what gears I have, maybe 4.10, maybe not, its a D350, but mine tops out at over 100 now. Gets to 100 MPH fast too. I have a getrag though. I also put the star wheel at the bottom for less spring resistance.

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You could put in a 3200 gov spring in and get more RPM's and go faster too. Its a lot of trouble though from what I hear.

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How to turn up your VE pump. The starwheel should be at the bottom. LOL

How to turn up a VE pump, with pictures..... - Dodge Ram, Ramcharger, Cummins, Jeep, Durango, Power Wagon, Trailduster, all Mopar Truck & SUV Owners. Dodgeram

 

The gov spring is not that much trouble as long as you pay attention to the throttle index. I did my gov spring in a hour and a half with never digging into my pump before. It was very easy and well worth it. Best cheap mod you could do IMHO, especially for the price. And don't turn the starwheel to the bottom unless your a kid that loves smoke and a slow spooling truck . Turn it up.