Darton Sleeves

Damn. Almost a bolt-on. Minus the fabrication. Lol

 

Lol yup

 

Copied over from my build thread. Updated the first page also.

The fabled Kelford cams!









I should also add, that a new set of dual valve springs (SuperTech) was ordered because the original set, from when LCEngineering originally built this engine, was binding when the valves were at full open. New SuperTech springs are in and work as intended. All of the intake bucket shims lashed out perfectly in spec, but a few of the exhaust bucket shims were out of tolerance. Those were ordered and will be in soon.

Here are the specs of my camshafts, for a point of reference:

Kelford Camshafts Stage 2 Turbo cams.

Total duration 265 intake, 270 exhaust.
Duration at 1mm valve lift, 225 inlet, 231 exhaust.
Total valve lift with lash set, 10.55mm inlet, 10.75mm exhaust.

The OEM total durations are 232 intake, and 236 exhaust.

 

Does this mean you will have your engine soon?

 

..........................

 

Uh oh

 

Torspd what was the outcome?!?!

 

The one pictured here was damaged by a very simple oversight of my own.

Since then, it is at the local machine shop with a second sleeved engine of mine as well. One is the stroker and the other is not a stroker.

The non stroker engine is being over-bored to ~3.804" from 3.701". That short block should be finished in about two weeks. As all of its components are in.

The stroker block is going to be heading out to WPC soon.

 

With the stroke that you're running, have you checked to see if your piston skirt isn't coming out of the bottom of the sleeve? Just curious how long of a stroke the stock sleeve vs this darton sleeve allows from the crank.

Edit: stock *bore

 

Yes. Those pistons in the stroker engine are made specifically for it. Including having been made not to do just that.

I do know what you speak of though. A common issue for crank swaps on LS engines.

 

Yea just wondering if that applied with your motor. Even with the ls motors when pistons are "made" for the extra stroke they are still a bandaid for the real issue. Just trying to learn more

 

Video with good info and where it talks about the skirt and sleeve issue with stroked ls motors.

http://youtu.be/VsmbbuSq9m0

 

Ha! Lucario Runner and I were just watching that video a few days ago.

 

Still working just fine. They did require a lot of removal head material for lobe clearance. There is a Kelford camshafts group buy thread. Those members purchased camshafts more recently, which were more drop in. All of them require upgraded springs.