Jeep Strokers

I was over on the Vortec 4200 forum and they were talking about getting h beam rods for about $600.00 per set. This is about half the price of custom rods. The source was K1 Technologies http://www.k1technologies.com/Rods/tabi ... fault.aspx The President is a guy named Ron Shearer , he is also president of Wiseco pistons. They currently do not make a rod for the Jeep application, but if the demand is there the are open to it. I would think there would be more demand for a Jeep rod than one for a Vortec 4200. My though was that the big demand would be for a rod that had a 2" diameter for the big end. This would allow us to offset grind the 2.1" pins on our cranks and get a 4" stroke. they could be made to use stock or the KB944 pistons. I could be wrong some people might just want a stock replacement for turbo applications and such. To gauge if there is any interest, I created a poll, so please vote! I will pass the results on to Ron. If you have an immediate need, you can try contacting K1 directly.

Thanks

Nice find.. hope enough people show interest to produce them

In my current financial state (starving college student) I just cant see myself springing for anything other than stock 4.2 rods. I'd be even happier with stock 4.0 rods if I could just afford the Icon pistons instead of the cast Sealed Powers.

That said, IF I had the money to build the stroker the way I wanted/wished/dreamed, then it would be a definate YES. I'd love to to build a square engine with a 4.00" bore and stroke and a healthy cam to see what kind of HP/TQ I could get out of it on 92 octane premium fuel.

Unless you want to be able to use the custom rod to work with the ICON pistons then you could look into the SCAT 2-250-6000-2000 connecting rod. It has a 2.000 pin diameter, 6.000 long, 1.050 wide on the big end and bushed for a .927 pin. Those rods are meant for the chevy 250 6 cylinder. If you want to upgrade to ARP2000 cap screws over the 8740 cap screws then add "A" to the end of the part number. Of course these rods would require a custom piston, but if a replacement was ever needed its a standard item and a light weight piston pin for a chevy is cheaper than one for a Jeep

2-250-6000-2000 http://www.cnc-motorsports.com/product. ... CtgID=8183
2-250-6000-2000A http://www.cnc-motorsports.com/product. ... CtgID=8183

~Alex

I thought the chevy rods were 1.030 BE width, maybe the journal on the crank is 1.050. The width on the jeep crank is around 1.070 and a rod with a BE width of 1.060 will be within the factory specifications. Less than that and you are out of the factory specs.

With the scat solution you need custom pistons and replacment rods, why not just go with a custom rod and be able to use standard pistons. The whole idea of the rods is to come up with a stanadard stroker rod at a reasonable price.

Plechtan wrote:I thought the chevy rods were 1.030 BE width, maybe the journal on the crank is 1.050. The width on the jeep crank is around 1.070 and a rod with a BE width of 1.060 will be within the factory specifications. Less than that and you are out of the factory specs.

With the scat solution you need custom pistons and replacment rods, why not just go with a custom rod and be able to use standard pistons. The whole idea of the rods is to come up with a stanadard stroker rod at a reasonable price.

SCAT lists the width of the big end of the connecting rod. An extra .010 wouldn't be the end of the world.

Having a custom rod allowing more stroke and using an ICON piston would be a less expensive combo overall though. Does K1 do groupbuy discounts? I wouldn't mind adding a set to my stroker parts pile, maybe someday I'll actually build one. I wouldn't plan on adding an entire .100 to the stroke, the net gain would be closer to .080-.090 depending on the condition of the crankshaft you're starting with.

~Alex

If you buy one of the Scat brand new cranks, no problem to grind for a 4" stroke. as for a group buy, pretty sure they would be open to it, probably need at least 10 sets at first.

Plechtan wrote:I thought the chevy rods were 1.030 BE width, maybe the journal on the crank is 1.050. The width on the jeep crank is around 1.070 and a rod with a BE width of 1.060 will be within the factory specifications. Less than that and you are out of the factory specs.

With the scat solution you need custom pistons and replacment rods, why not just go with a custom rod and be able to use standard pistons. The whole idea of the rods is to come up with a stanadard stroker rod at a reasonable price.

I thought about using the chevy 6 cylinder connecting rods for a 4 inch stroker. The 1.050 width would allow for a larger radius on the crank for extra strength. A longer rod would be nice.

I didn't really take a look at the rod specs that 505 sent my brother to use with their 4.060" stroke crank(poor MJ has been waiting patiently to get built and driven). I wouldn't be surprised if they were the chevy 250 h-beams. I have a set of the Eagle 6.150"s that will be used on my next stroker(probably years down the road), so that eliminates a 4+" stroke build.

A quick note on making a bigger radius on the crank pins, when you offest grind, you usually do not remove much amterial from one side of the journal, so if you ground with a larger radus wheel, the radius would be different as you went around the pin. Normally the radius does not contact the connecting rod. The bearing inserts are not as wide as the rod, and the radius is normally less in height then the bearing inserts are in thickness. The bottom line is that the rod rubs on the crank on either side of the pin. The additional clearance from the chevy rod could allow additional oil flow and reduced oil pressure.