85 rx7 VH powered...nightmare.

Discuss topics related to the VH41DE, VH45DE, VK45DE, and VK56DE engines.
asmcnally
Posts: 14
Joined: Thu Feb 17, 2011 2:42 pm
Car: 1985 RX7 VH45 powered
Location: Jacksonville, FL

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Well, it's been a nightmare. I got the car thinking it would be an easy motor swap and have a cool project. After dealing with the horrible swap that CraigsToyz did on the vehicle, I have redone practicaly after part of the swap. I did leave the steering rack Craig put in there...

Anyways, I've started to draw to a conclusion. The details are she’s an 85 RX7 with a 96 VH45. I'm currently in the progress of establishing the wiring. There was no CEL, OBD2 port or knock sensor connected. I've got the FSM and the pin out established, what I am hoping is that someone can tell me where about they split from the harness? I'm hoping to be able to use as much of the OEM wiring as possible. A lot of things are re-wrapped, so I'm hoping if I can narrow it down I won’t need to unravel the entire harness.

Secondly, here are some pictures.
The car:
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The reason the motor was blown:
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There was some pretty serious wear on the cylinder walls, and at least a .010 over would have been required. The crank had some serious wear on it, and most likely I would have needed the .12 undersized bearing that Infiniti offers. But with pistons being as expensive as they are, I opted to go with a junk yard. After much labor and cleaning, and painting, I wound up with this....
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Here are some examples of CraigToyz fine work...
The transmission mounts were welded in, not only were they welded OVER the bolts holding the mount in, they were also welded TO the bolts (that weren't even tight). Guess how much fun the transmission was to cut out? And how many blades I chewed through on the reciprocating saw? 4. Because of the way it was welded up, there was no clean angle to cut. I had to cut away sections at a time, so I nicked the tip quite a bit and either bent or shattered blades. The best weld on the damn car was the bolt that was welded to the rear of the transmission mount.
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The other side, which had the muffler welded on to it as well.
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The headers/exhaust. Yes, the exhaust actually is the flex-tube aluminum piping, welded right to the header collector and muffler. Not to mention the exhaust was solidly welded to the car, and the the bolts as well were welded to their brackets.
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The original motor mounts were made out of pretty thin metal, and not reinforced at all. A simple "L" that was welded on at the very bottom, they were bending needless to say. Not to mention, the motor mounts weren’t even bolting to the mounts. So I removed all of the welds, and created new mounts that were 1/4" steel, on the sides and 1/2" on the top. I did reuse Craig's metal because he did already get the angle for the engine mounts to cradle in. Here are my new mounts...
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Here's the engine bay as I'm sanding away all of the oxidation Craig painted over,
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And here it is painted
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This is me sitting the motor in there to line up the holes for my new mounts
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I lined it all up, did some fab work/drilling and here is how she sits now.
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As of right now, I need to finish created a transmission mount and I am waiting for all my mandrel pipes to come in from summit so I can make some log style headers, that are...dare I say...flippable :ohno:

I've got the entire set up designed so that if I decide to boost, I can flip the headers and re-use my entire exhaust set up. I'm hoping to have enough room to slide my headers in without completely removing the motor, but I doubt it will happen.

On the list as well, is to create a way to hold the radiator. Craig was using a plate that was held on by a bolt (with no nuts) and some thick wire, looked like that coated wire coat hanger.

Credits - Jimmy has been a big help in trouble shooting a few things. So thank you, cypher02xd.


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LEMHEAD16
Posts: 1769
Joined: Tue May 06, 2003 3:58 pm
Car: '12 Genesis Coupe
'95 QofDOOM
'56 Chevy pick up
Location: Boise, ID
Contact:

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Not generally a fan of talking sheet about someones build, but damn! That s*** is scary! We all gotta start somewhere though. I've done my fair share of questionable engineering, but never anything like that.

Hope you get it running. My buddy is building a LS1 powered 83 RX.

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speedeast
Posts: 1610
Joined: Sat Aug 01, 2009 7:01 pm
Car: 1990 240sx VH45 FB & 1993 300zx
Location: Orlando, Fl

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I feel your pain...

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LEMHEAD16
Posts: 1769
Joined: Tue May 06, 2003 3:58 pm
Car: '12 Genesis Coupe
'95 QofDOOM
'56 Chevy pick up
Location: Boise, ID
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Also if you need any ideas for the log style manifolds check my build thread. I built mine planning on boosting it someday.

asmcnally
Posts: 14
Joined: Thu Feb 17, 2011 2:42 pm
Car: 1985 RX7 VH45 powered
Location: Jacksonville, FL

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Well, it wouldn't bother me so badly if CraigsToyz didn't solicit his business or charge a lot of money to do swaps. The owner moved the car from GA to TX to get it taken care of. You don't do this kind of work and charge for it.

And please, send me the link for your build. I need the ideas. My piping just got delivered...I've actually got a buddy who agreed to TIG it up for me if I get it set up.

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LEMHEAD16
Posts: 1769
Joined: Tue May 06, 2003 3:58 pm
Car: '12 Genesis Coupe
'95 QofDOOM
'56 Chevy pick up
Location: Boise, ID
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Here is what mine ended up looking like. The drivers side had to angle in towards the back to clear the steering column and brake booster. Overall very easy to make and they do flip sides.

Link to full build
lemhead16-s-vh45de-s13-project-t384933.html

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elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
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I know you posted this in the Q forum to begin with, but I think this would be a bit more applicable in the VH45 forum, so I moved it here... :)

asmcnally
Posts: 14
Joined: Thu Feb 17, 2011 2:42 pm
Car: 1985 RX7 VH45 powered
Location: Jacksonville, FL

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Oh - that's a good concept. I'm thinking I will need to actually make my driver side angle outward to clear my column. I got all my piping in today, I'm planning to do a very effective tear drop log style. Basically a short runner tear drop into the log which is similiar to your concept. I haven't been able to find a good way to bridge the first runner like you did yours. Did you just flat out bridge it or use a reducer? My piping is a 1 3/4" runner into a 2.5" log, which I could probably cut away a little of the 2.5, fold it in a little bit and re-weld it closer to my size and bridge it, but I'm not sure I like the idea of doing that.

I'm pretty new to welding in general - especially in piping, I've got a good aptitude towards it but I would certainly appreciate any advice on the design.

Elwesso - thanks, I appreciate it :)

edit - how far do your headers stick out from the head? Measured either at the edge of the head or the ports.

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speedeast
Posts: 1610
Joined: Sat Aug 01, 2009 7:01 pm
Car: 1990 240sx VH45 FB & 1993 300zx
Location: Orlando, Fl

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user: drftbld and his company in California have developed turbo manifolds for the VH45. You should look into those.

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hannibal
Posts: 9680
Joined: Wed Sep 11, 2002 2:38 am
Car: Red Line to Glenmont
Location: Washington DC

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^ Anymore info on his manifolds? Does he have a website?

DRFTBLD
Posts: 311
Joined: Fri Jun 12, 2009 7:54 am
Car: 89 S13 VH45DETT
05 Ford F-150 Drift Support
91 S13 Tester
08 Ford Focus
Location: Green Bay, WI
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Still working on getting them on the website. but there is a post on here about them... well the first design. We made a bunch of changes and now have a second set we are going to production with.


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