cummins driver

My Feedback: (31)

So whats up with the STS .28 and .30? I have seen them make great power stock in video's, but what is the problem with them? I know they are somewhat cheaply manufactured, but seems i heard that the crank pin tends to break off and that they are somewhat finicky about the pipe you run?

I would consider one for the price if I was sure it would last a little while. Id like to try one on my pulling truck, but like i said, may not be worth it if the crank pin breaks after a gallon. Anyone have any solid info on them? How do the .28 and .30 compare? Not really seriously considering buying an engine right now, just wondering what the deal is with them. [8D]

stussman

I got a new sts28 bump start and it came with a spare crank in the box. Never used it so i sold it.
I did have a sts 30 and it hauled ass (in a truggy) until it blew after a few gals.
From reading alot about them it seem the quality of some are bad while others are **** hot and fly.
Theres one on ebay Australia now for $80 brand new. Iam tempted.

Thunderbird93

Like stussman said you can get a really good one or a bad one out of a batch. I have a practically brand new .30 that I've had since the .30 came out but dropped it and broke a mounting ear off the block so I have yet to see how good this motor is. You can get a brand new .30 for about $110.

asmund

I broke the crank pin on my brand new sts .28 marine after a few tanks. It is a stupid design where the crankpin is hollowed out so there`s very thin material left in it. I solved the problem by replacing the crank with the STS .28 PRO crank that is solid in that area and a standard back plate. I think the PRO version is a much better designed engine and not that much more expensive afterall