Jeep Strokers

Has anyone tried to ceramic coat the piston tops, head combustion chamber and exhaust ports? What about the oil sheading dry film lube for the underside of the pistons, rods and crank? I am wondering if it would help with preignition and in making power....Tim

I've heard that coating the combustion chambers, piston tops and exhaust runners helps. Research the company you intend on doing the coating extensively. I would recommend Calico in NC. A bad coating job can ruin a while engine. The oil shedding stuff isn't worth it. Way too much of a risk coming off and hot oil won't really bulk up on the parts than much. Better off grinding down the casting grain and polishing the rods.

Dont bother unless your going to run an alky motor. Also never cermaic coat a combustion chamber without doing the piston...also never polish a combustion chamber...what else...

How about water injection to let you run more advance and to clean the carbon out of the chambers?

Jeepsr4ever wrote:.also never polish a combustion chamber.

What? Thats wrong.

Actually its 50% water/methenol mix. Tim

johnj92131 wrote:How about water injection to let you run more advance and to clean the carbon out of the chambers?

SilverXJ wrote:

Jeepsr4ever wrote:.also never polish a combustion chamber.

What? Thats wrong.

You never want the combustion chamber more reflective than the piston you always want to divert as many heat waves as you can at the head and absorb them in the head. Its a bad mistake to polish a combustion chamber for that reason as well as causing any kind of coagulation of fuel as it moves throughout the stroke cycle.

Now if you are talking about exhaust port yes a polish is beneficial there but not in a combustion chamber or what others will call an exhast chamber.

The heat transfer is more valuable than the drag created by polishing the combustion chamber. More heat is kept in the combustion chamber but less in the metal. It will increase thermal efficiency and in theory can increase power output. Higher compression can also be ran before detonation. Since more heat is being reflected in the combustion chamber it also decreases the load on the cooling system. It also helps to reduce carbon which will maintain the original compression as well as deceasing hot spots in the chamber. The exhaust port should receive the same polishing for similar reasons, but the intake port should be left slightly rough.

SilverXJ I cant agree with that 100. Once you polish your chamber you are much more prone to ping. The only guys I have ever seen at a race track that are showing off their port work and have a polished combustion chamber have been those that are very new to porting. Once the gases move past the intake seat they must remain very turbulant as turbulant as they can. If you try to create a dead zone in the combustion area you are now reflecting heat. You want to polish your combustion chamber thats fine but know your not running low octane pump gas anymore nor do you want to run without a piston top hard anodize. Each facet of performance has its place but I would never suggest to a guy running pump gas to polish his combustion chamber. Smooth out and unshroud...yes. Keeping an open mind my experience may be different that yours so maybe there is something new here but I have a few years into it...dont know it all but definately have built 1000+hp.

<bump>

reviving - any new information or experience that can be shared here I would love to read about it.

I am considering doing Swain Tech not just white lightning on header but other internals. And at the very least piston head coating.

thank you.

http://www.zircotec.com/page/performance_cars/16

??

http://www.brycoat.com/WS2/

http://www.wallworkht.co.uk/content/diamolith_dlc/

DLC coatings are different from heat rejecting coatings. Its more for anti wear.

True and good call - and was throwing it up under ceramic coating even though thread started with a TBC. Coatings effecting and desired results with controlling engine temperatures (friction).