Love the comments from the uneducated.

No, I don't work for Trinity or any other shop. I perform my own research and work not related to anyone. If I find a problem with someone's part, including Trinity, I will let you know. I am not in the business and I will not make one thin dime on any of my notes or research. I am one of a small group that loves the sport but hates bad products. That is how we got started in improving the atv's. My experience is based on a real education, 30 years of motorcycle riding, car and boat racing.

Now, back to the heads -- Instead of making comments, simply verify what I say and you will find that I am right. -- Oh, and once you do, please be a man and correct yourself here.

The Pro Design head alters the water flow in the engine. Specifically, if you look at the domes installed with the cover off the head, you will see that the water is not directed to flow down into the cylinders. Hence, you have an engine that appears to run too hot for no reason.
Now the people who never bother to invesitgate will simply think that the head is so high performance that the engine needs to run hotter. In reality, if you run temp probes on a stock head and cylinder then install a Pro Design head, you will see that the head runs cooler but the cylinders instantly run hotter. Clearly, there must be a reason for the new found heat in the cylinder. It is the improper design of the water flow passages!

On the Trinity head, take off the top and you will see that the domes are designed to force water down into the cylinders just like a stock head. Try it, get a Trinity head and a Pro Design head of the same squish and cc. Get a ir temp probe and run the engine with each head. Guess what, the ProDesign will over heat the cylinders! So, with the extra heat, you now go out and buy a "big" radiator and water impeller. The problem is that the impeller and radiator really don't correct the problem. Also, your new big impeller must use more potential energy to move the higher volume of water.

Finally, one note that may be above the heads of the people bashing me -- The colder the head runs and the hotter the cylinders run, the less power that can be sent to the rear wheels. In scientific terms, fuel produces energy. When the head cools too much (because the water does not flow into the cylinders) energy that would otherwise move the piston down the cylinder giving more power is sent out the radiator. That is also why we ceramic coat the dome and piston top. It prevents heat losses. This is not a new science -- Chevrolet discovered this problem in the 60's with the advent of aluminum heads on its L88 427 engine. Although the aluminum heads removed considerable weight and had very high tech port designs for the era, the older iron heads would produce more power. The smart engineers knew there was a problem and quickly realized that they were loosing potential energy out the radiator. No, they did not have a water flow/cooling problem. They had a problem with the aluminum drawing too much heat (compared to iron heads) out of the chambers. I think they fixed their problem with water restrictors and by adding more aluminum mass above the chambers.

Again, I am sorry for those of you who really want to know the correct info on these engines. People with a lack of knowledge or research who post here make it difficult for the correct information to be displayed and really makes this site look bad.

 

Raptor 720, where are you located at in SoCal?

 

Yes, born and raised in CA. Any reason??

 

Sorry 720, but with a thread entitled "advice on head" who can resist? Not I, at least we kept it short. Comic relief is a good thing. Good Head, and plenty of it, is what we're interested in after all. Oops, there I go again. [img]i/expressions/face-icon-small-happy.gif[/img]

 

No worries fourplay -- I mean fourlix. There I go with the comments.lol My comment was actually directed to chasman and his comment about me and Harry's rear. Wouldn't it be nice if chasman actually did some research before popping off?

I clearly would not have replied to the initial post if I did not have something to say that was worth saying. Heck, if ProDesign had a good head, I would post that it was the way to go.

 

well seems my reply which was meant to be funny was taken the wrong way. So, for that I am coming out to apologize to Raptor 720. To be honest, I don't care about a 2 stroke head, I have a 4 stroke that runs just fine. In the future, If I have something funny to say I will state that, so noone gets bent out of shape.

 

Thank you Chas. I appreciate your reply.