longer rods for eclipse

[eclipse787]

i bought some eagel rods for my 420a motor. the wrist pin fits and it bolts to the crank, but its too long. the guy i bought them from on ebay said they were for a 420a but i looked at eagels website and there .136 incehs long. do i need new rods or modifications to the head?

[SilvrEclipse]

If the rods are to long you will have to buy new ones. Do you have a stock rod you can compare the length to? Messure how long the rod is total with a ruler. I have a set for the 420a so we can see how much longer yours are. You need to find out what they fit.

[eclipse787]

well heres the part number from eagle crs5608n3d. there .136 longer. why would they make a longer rod if it wont work in a motor?

[Thor06]

You just bought the wrong rods, the ones you need are CRS5472N3D. Next time you might want to read the auction before you jump into something like that, that was a pretty costly mistake due to haste. It will work if you get a crank with a shorter stroke, but I think cranks like that are generally a good $750-$1500 depending on brand and availability and such.

A "long rod" setup is used in destroking motors so that the piston will still come up to the right height. This is used to get a better rod ratio (length of the rod over the stroke) which helps in rev happiness of the motor. Ever wonder why its generally said you cant rev out a stroker? This is why.

[tfoti]

Originally Posted by Thor06

Ever wonder why its generally said you cant rev out a stroker? This is why.

I hit 8000 today...Not used to the light flywheel yet.

[eclipse787]

Thanks guys. looks like im buying different rods. its way to hard to find a crank with a shorter stoke, and who knows how much it would cost. although higer rpms do sound appealing. since the auction on ebay said they were for a 420a eclipse, im getting my money back. mabye next time he'll do a better job in describing them!

[eclipse787]

can anybody help me find a shorter crank shaft? i dont know if i am going to be able to get a refund on these rods. it might be easier to just get the smaller crank. thanks

[Thor06]

On a 420a, I doubt you'll be able to find one... and if you do its going to be probably around a grand minimum. Its definately going to be cheaper to just buy new rods and relist those bad boys on ebay.

[gthompson97]

I've never seen nor heard of a destroked 420a. Chances are, you'd have to get a custom crank cut, which could cost a couple grand at minimum. Turn around and sell the rods, and then buy the right ones.

[eclipse787]

well what i was hoping for was a stock crank and maybe the neons came with two different cranks. that way i could just buy a stock one thats shorter. but i guess these shorter stroke cranks are one of a kind.

[SilvrEclipse]

Yea no other cars use the one that you will need. You should be able to get your money back no problem though if you payed with paypal.