Who is going to be the first to try it?

 

looks interesting!

 

We need someone to test it next to a 38r

 

Link to it?

Got it.

http://www.riffraffdiesel.com/rdp-66...onversion-kit/

 

I would have done it if I hadn't already gone with a full 38R a few months ago.

 

This looks nice. I wonder if the shaft is the same size as the 38R shaft? I thought the 38R was bigger. This will be a nice conversion to have and be able to rebuild this one unlike the roller bearing. I wonder if there's been any testing on the extra performance of this set up. Boost should be much better and spool up as well.

 

I thought Clay would have chimed in about performance or reliability of it. I would like to get this since I will be rebuilding my turbo next year.

 

Sorry, didn't see this thread till now. Merry Christmas everyone!

Basically it is just an economical way to fit a 66mm wheel. We aren't into manufacturing fake reasons why it is somehow made with unicorn farts and rainbows. Kit consists of a Garrett 38R wheel, exact same that comes in the 38R part number 729567-0001, a ported housing, backplate and intake boot. This allows for you not having to machine out the stock housing to fit the 66mm wheel. So besides the ball-bearings this will allow you to have a 38R. It is only "better" than a 38R if you consider the ball-bearings to be a negative factor. Over the years we have heard tons of stories how 38R's "blow up", but I can tell you I have only ever seen one with a broken shaft and never ones with bad bearings. All of the "failures",maybe half dozen, we have seen come through have always been the turbine side oil seal which is serviceable with the correct tools. So no, this isn't going to somehow perform better or worse than a 38R except that depending on tuning and injectors it may not spool quite as fast as a ball bearing 38R.

 

Well, I really like the thinking on this and I feel like this is a very nice option for people looking for a performance upgrade and/or who were at a point where they were looking at having to rebuild their current stock turbo. I have a 38R and I have said (and heard many others say similar) that this is the turbo that these trucks should have come with from the factory.

 

Thanks for chiming in Clay. I like the kit and its half the price even with upgraded RRD goodies then the OEM 38r.

 

Another thing to consider, with this conversion kit, is it makes no changes to the exhaust (turbine) side. In comparison, the GTP38 comes with a .84 A/R housing and the 38R has the 1.0 housing. I would think this would allow this journal bearing "hybrid" to spool up a little quicker at lower rpm, but would have a higher drive (backpressure) than the BB 38R. IMHO, I would upgrade to a 1.0 turbine housing with this kit, as I have seen positive results with it's addition to a stock turbo with a ported compressor housing. Even with the additional cost of the housing, you would still be under that of a 38R and have a DIY rebuildable unit.

 

This would probably be best suited for those that already have a van turbo...like me. The only thing is I can already push over 30 psi so I do need to increase that. I would just be curious how much more air it would move. I have to back out of it pulling a long grade when towing because of egts. That is why I put the van turbo in, in the first place. Before anyone asks.... Gearhead tunes. 160/30

 

One of my first thoughts when I saw this kit was that it would pair well with a van turbo, especially with an upgraded compressor wheel. I ran the 38R (stock wheel) for a few years with a 1.15 A/R turbine housing and 180/100 singles; towing a 10-11k fifth wheel. The 1.15 did help drop the EGTs some, but low rpm spool up suffered (black smoke). I switched back to 1.0 after running the RDP billet wheel with the 1.15 for a short time. The billet wheel/1.0 turbine housing seemed to be the best combination for drivability and EGT reduction.

 

I have the billet wheel. I get confused with all the lingo. So 1.0 on intake or exhaust side?

 

Exhaust (turbine) side.
I just edited my previous post to, hopefully, make it more clear.