Wtb tce drtc!

[orangecky2k]

O damn must have lost my gauge in the whole mess of a group buy this was. Anyone have an extra one or measurements? Just want to finally get this motor done!

[3400-95-Modified]

Kit should have included depth gauges... I had mine milled down on a bridgeport.

[orangecky2k]

Hey guys getting back into my project and having alot of trouble finding the directions on how far to groove the cover for the DRTC. Can someone post the link if they have it? Any suggestions on how you guys did it would be greatly appreciated also!

[3400-95-Modified]

I've gotta drive my car to TN next week and I installed the original set before driving to Colorado... I will not do that again so mine will be waiting till after I go on my car show trip. Might not happen till this winter if I pull the motor and then get some miles on it next year to see what it does.

[unchained01]

Got my DRTC today has anyone installed theirs ?

[ericjon262]

Pics of an OEM 3100 setup

you can see how the bearing is not flush with the block as Marc is suggesting to do when using the SBC bearings.

Kinda wish I knew where mine was placed because I need to pull it all apart to verify if I want.

Thanks for doing this, I need to pull mine apart so I can install the revised set and now I have another thing to look for.

[3400-95-Modified]

Pics of an OEM 3100 setup

you can see how the bearing is not flush with the block as Marc is suggesting to do when using the SBC bearings.

Kinda wish I knew where mine was placed because I need to pull it all apart to verify if I want.

[3400-95-Modified]

It's only about .03 set back if that... That's what Marc measured on one of his. I'll have to check mine later I can post some pics after lunch though.

[Superdave]

We drilled the 2nd hole in mine too, I can't remember if they were set back at all. I may have pictures but i'd have to look.

[3400-95-Modified]

There probably wont be any "issues" per say but they may not last as long as the OEM setup since I did verify that the OEM bearing is set in just a bit from the block surface, also if you or the installer inadvertently set the bearing in from the block face then you corrected any possible issue.

I know the SBC ones don't have a dual hole setup on the front like OEM does so the set I'm putting in tylers engine I drilled a second hole to be like OEM.

[Superdave]

I ran the SBC cam bearings in my 3500, no issues. Was using a pre-99 GM timing set.

[3400-95-Modified]

This gives you a rough estimate of his concern...

In text.

, I was thinking of things that could restrict oil flow and thought of some things that could be potential problems. Not just with the DRs but any engine having TC wear issues. I have attached a sketch showing where the oil holes are in the thrust plate relative to the cam bearing and journal. As you can see, the holes are mostly covered by the bearing.
I do not have a stock engine open to see where the bearings are installed from the factory but pushing them in .015~.020" below the surface of the block would allow considerably more oil to escape and get to the chain. The other thing I noticed when comparing Sealed Power SBC bearings to Sealed Power 60V6 bearings is the 60V6 front bearing has a groove cut from the oil hole to the front of the block while the SBC bearing does not. This could also be a problem for someone running SBC bearings. I know the performance book says to use them but it was written based on the iron head engine which doesn't use a thrust plate.

I hope to verify some of this tonight since I have both an original 96 3100 to reference and I also have a bare 3400 I'm building for someone that is getting SBC treatment so I can install those bearings and see how they line up.

[3400-95-Modified]

got my DRTC back today. the chain fits into the links all the way around, and everything seems right.

My old one fit like that as well, It was only when holding chain in one spot and trying to wrap it with only gravity would it walk out.... which may appear to be slight differences in the chains because a stock cloyles setup responds the same way.

I've been emailing Marc back and forth regarding the possible oiling issue and how it may still be somewhat present even with the new grooves cut, mostly because of how the thrust plate is designed as well as how far the installer puts the bearing in relation to the block face. it could prevent oil from reaching the holes in the thrust plate, or sufficient oil at least.

[1988GTU]

got mines last week, but havent opened the boxes yet.

[MY91GT(Z)]

I wish I could jave afforded on of these

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