Looking at the pictures of the crank you have kept the standard style oil drillings and not the straight shot oil feed to the main bearings,
Why have you done this as it will restrict the oil flow to the main bearings at high rpm unlike the straight shot.

Mark

 

What kind of head gaskets were they using? Many people have reported issues with Cometic gaskets which seem to be a popular choice on the 4G64's due to a small choice of available options.

 

A noteworthy detail, and probably a wise choice.


And if a gasket sealing test provided by another member some time ago holds any merit, the Cometic item performed rather poorly as compared to the factory MLS and Cosworth parts.

 

This question is coming from the seller of the most expensive 2.2 stroker kit in the world! Mark how long have you been selling your 2.2 kit?

 

about 7 years.

Mark

 

2 motors were built by RRE, and 2 were 2.3RR's. The blown gaskets were Cosworth, Cometic, a regular Felpro, and a super duper o-ring Felpro.

 

That's really good, helpful info...thanks

Were any of those motors using the bigger headstuds that RRE now uses?

 

I know they were all using upgraded studs, but I don't know specifically which ones. I would assume that the RRE's were using oversized studs, and the AMS motors were using L19's since that's what they sell.

The only part that makes me think it could be made to work is that none of them were using head gaskets that people claim work well, which include Power Enterprises, HKS and SCE Titan. Pretty much everyone agrees that the Cometic gaskets suck, and I don't know about Felpro. The one that worries me is the Cosworth because they have a pretty good reputation.

 

GSC any reply?

Scorke

 

Can someone explain to me the oiling system as it relates the crank?

I think the bearings have holes on them, and the crank has holes, and I think the block has holes where the bearings sit? So how does this system flow exactly.. like from where to where?

 

He must have missed it.

Mark

 

Sounds like a DSM and not an Evo though. Something to keep in mind is that the metallurgy has changed in the DSM heads to the Evo heads, and even in the Evos the IX head is more rigid than the VIII.

Block prep and head prep are key, but I have been told that O-Rings are unneeded and this is from Marco who used to prefer the 2.4 in his racecar

Crcain, I was looking for the HKS but as of yet havent found the part number. Any leads? The other gasket I have seen that looks good is the Titan SCE full copper gasket. It now has embedded O-rings around the water passage so its looking really good.

There is a Power Enterprise gasket also as I recall. Marco suggested that the HKS was the one I wanted though.

 

All 4 were evo's. I am still gonna give it a try though. The more I've read the more I want to try the stock head gasket. FI motorspiorts ran one to 52psi and never had a problem. I am going to use l19 studs with a bored out stock evo hg and see what happens. I originally ordered the SCE but I had second thoughts. Even the guy at SCE told me 35psi would be the limit.

 

I wouldnt bore a stock Evo Gasket unless you can get it in an 85.6mm to start with. Let me do some research since I have been lagging on that promise and I have motor to assemble as of yesterday afternoon as well

More to come.

 

Ok thanks, just let me know what you come up with. I am really concerned about getting the head to seal. I've looked everywhere for an HKS hg, but every one I find is 86mm bore. Even the HKS website only lists the 86mm so I don't know how people are using them for a 4G64. Unless they are actually a larger bore than listed. I can call HKS tomorrow.