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GoatOfRafin's Rotrex build

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Old Nov 5, 2015 | 01:08 PM
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Smile GoatOfRafin's Rotrex build

Hi all!

I recently had the chance to own a 350Z RevUp and now on to the process of collecting the proper parts for a Rotrex C38/91 build. I will be building a separate engine with the engine block and crank from bealljk (thanks, you are da man! ) and a built head from silencedeyes, with forged pistons of 9:1 compression. If my calculations are correct, I will be going for ~20psi and ~650bhp (crank hp). I have already installed an eManage Ultimate, bought from bcoffee20 (thanks mate, you are a very thorough and helpful guy) plus a VManage for tuning CVTC and eVTC. This combo has already provided me with gains from my cat removal, longtube headers and custom true dual (H-piped) 2.75" exhaust (~23bhp peak gain and ~30hp gain at mid RPMs) which will also be the exhaust of my supercharged build.

Until now I have managed to collect the following parts:

- Rotrex C38/91 with its peripheral devices (oil lines, oil cooler, etc)
- Frozenboost intercooler
- Deatchwerks 600cc I/J (bought from nathanwl2004)
- AEM 320lph fuel pump
- Larger baffled aluminum oil pan
- Brian Crower rods
- ARP main and head studs
- NGK one step colder spark plugs
- AAM upgraded MAF
- Cometic gaskets
- Exedy lightweight flywheel
- JWT clutch
- Plenum spacer
- Innovate DLG-2 dual lambda gauge
- SPA boost + oil temp dual gauge

Remaining items are a set of forged pistons of ~9:1 compression ratio and a complete fuel return system. Here are some photos of the stuff!





AAM competition MAF





SPA dual boost/temp gauage





Flywheel and clutch





Cometic gaskets





Stock crank





Stock block





I/J, SPA and Innovate gauges





Longtube headers





Frozenboost intercooler





New oil jets for the block





Larger baffled aluminum oil pan





Plenum spacer





Brian Crower rods





Rotrex C38/91





Spark plugs and studs (among other things)





V-Manage
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Old Nov 5, 2015 | 01:17 PM
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By the way, here are the gains from cat removal, longtube headers and custom 2.75" true dual exhaust...





Stock vs new exhaust (after tuning)





Stock vs new exhaust (no tuning)
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Old Nov 5, 2015 | 01:26 PM
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What oil pan is that?
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Old Nov 5, 2015 | 01:40 PM
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Got it from ebay.de (German eBay); I do not think that it has a specific brand. Here is the view from below...





Bottom of the oil pan
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Old Nov 5, 2015 | 01:45 PM
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Have you tried fitting it yet?
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Old Nov 6, 2015 | 12:34 AM
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No, I am planning to do that to the built motor...
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Old Nov 6, 2015 | 04:49 AM
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How do you plan to mount that rotrex blower?
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Old Nov 6, 2015 | 05:12 AM
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I am considering to get the bracket from these guys...

http://www.auto-gruppen.se/webshop/s...7/image/38477/

They told me that they sell it (a bit pricey I might add) separately. If not, I have to custom make something...
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Old Nov 6, 2015 | 05:19 AM
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never seen that company before.. How much do they want for just the bracket? and what is the max power potential of that blower on the Z? If it would not put out over 600 it probably would have been easier/cheaper to go vortec
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Old Nov 6, 2015 | 05:52 AM
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It's like $500 or something... I 've got the Rotrex for a very good price, hence the whole deal. Plus, the Vortech kit would be too expensive to get it here due to tax + shipping costs.

By the way, as I was writing at my first post, I am expecting something near 650bhp (crank hp).
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Old Nov 6, 2015 | 06:14 AM
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Cool I look forward to seeing it done. 500 for the bracket is pretty cheap!
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Old Nov 6, 2015 | 07:14 AM
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I guess I am used to cheaper price ranges...

Last edited by goatofrafin; Nov 6, 2015 at 12:48 PM.
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Old Nov 6, 2015 | 12:32 PM
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Originally Posted by goatofrafin
Got it from ebay.de (German eBay); I do not think that it has a specific brand. Here is the view from below...





Bottom of the oil pan
I've got that oil pan. It fits fine, but the bolts that come with it are complete crap. Buy better hardware. It's also worth filling it up with oil on the bench to make sure there are no porous parts of the casting (I've heard of this happening with these). If it seeps through anywhere, you can use the green loctite to seal it, just spread it on and it'll seep into the pores and cure.

It also makes fitting a sandwich plate for an oil cooler a bit more tricky, but it's doable.

Other than that, I have no complaints about that pan.

Very cool project. Nice to see a real Rotrex in the works

Last edited by kilogram; Nov 6, 2015 at 12:34 PM.
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Old Nov 6, 2015 | 12:49 PM
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Wow, thanks for the tips, really appreciated!
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Old Nov 6, 2015 | 03:20 PM
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Sub-scribed!

excited for this build!

jkb
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Old Nov 9, 2015 | 10:23 AM
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what clutch did you get from JWT? I only ask because depending on what you plan on making for torque numbers that may not be enough clutch... just some food for thought, good luck with the build.
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Old Nov 10, 2015 | 04:14 AM
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Its a supercharger torque wont be a problem, if hes very lucky he might hit 500ft/lbs
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Old Nov 10, 2015 | 03:24 PM
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true, but why buy a clutch that would barely hold that instead of one that will for sure hold it...
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Old Dec 14, 2015 | 12:05 PM
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How's the build going? I have a lot of parts from my c38-92 build but not sure if many of it will fit with LTH. Let me know if you are interested.
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Old Dec 14, 2015 | 04:49 PM
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Originally Posted by goatofrafin
Got it from ebay.de (German eBay); I do not think that it has a specific brand. Here is the view from below...





Bottom of the oil pan
just a heads up, thats a knock off version of the APS oil pan. I had the exact same one and threw it out because it leaked. Oil was seeping through it. Drove me nuts. Just keep an eye out for that, and also you may want to get the pickup extender as well that comes with the real pan.
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