I would like to clear one thing up about MY BUDDIES (C5inPhila) custom made FACTORY GM 2 piece timing cover.A sponsor has said,"THERES FLEXING IN THIS COVER" and that is NOT TRUE.

We have had these on at least 8 cars now with NO ISSUES.U CANT run a dual roller with them but the JWIS is more than adequate for a timing chain upgrade as the C5R runs this type of setup as do I and my buddy C5in Phila does too.

They cost less than 295 for complete kit.
Nasty Performance sells the kits if u need one guys....

 

Actually, I said something like that. Are you sure you're not thinking of what I said??

I was referring to the new LS1/LS6 Performance book. It said the front and rear covers are stressed members. Cutting that cover in half can't be good, but if done well, it doesn't have to be bad either. That's for each person to decide on their own, unless someone actually comes out with some real test results to prove it doesn't weaken it at all. FWIW, I intend on buying the two-piece cover from Nate.

Eugene

 

Actually, from the pictures I have seen of the modified factory cover it is probably STRONGER than the QTP cover. With the modified cover a factory cover is sawed in two, then two large thick flanges are welded to each piece of the cover. These two flanges are drilled and taped and bolt together with 4 bolts giving what appears to be a as strong or stronger than factory cover. The QTP cover appears not to bolt the two halves of the cover together at all, and simply glue the seam so it don't leak. So as far as being strong as a stressed member the modified cover would have to be stronger.

Now the real question, is the front cover strength going to make any difference? I'm going to say no, at least on anything less than a full race engine. There is nothing bolted to the front cover, so it is only there to hold the front crank seal and keep oil from leaking out of the engine. It don't take a lot of strength to accomplish this. Sure, when the cover is bolted onto the front of the engine it will stiffen the engine block, but how much? My guess is VERY little. So I feel either cover will perform just as well as the other, it only has to hold the crank seal in place and not leak.

I think both covers are nice setups. I like the QTP design with the larger bottom for a bigger oil pump. I also like the simple but effective design of the modified cover. I would not be worried about strength of either cover.

 

Correct it bolts together and is as strong as it was or stronger than GM made it.Its a nice cover for the $$$$ and u dont see the cover so who cares what it really looks like anyway,Call Nasty Performance if u need one guys.

Its worth the 295 for the complete kit...

 

Hi, i make the covers for nate. At first i made one cover for myself ,that cover has been on my car for 1 year with not even one drop of oil leaking. For testing i do not know what else could be done? The q.t.p. cover is beautiful polished peice and is cnc machined, mine is not.That is the diffrence in price. I do not belive either cover will flex.thanks walt

 

I would think, just looking at photo's, that any "stressed section" would be between the oil pan and the engine block. For both covers, this section is still one piece. The remaining upper section is just a closure for the cam sprocket and I wouldn't think it would carry much load if the bottom is installed and tightened correctly.