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Howlermonkey · 01-22-2009, 01:03 PM

I think you are mistaking arguing with discussing.

Nissan blazed this trail when they put a rb into a z31 body over 20 years ago.

Now if you only have 1/2 inch between the firewall and the head, then the flange of your tranny as installed is indeed back further than in the stock implemention of the Z31's VG30.

The mating surface of the tranny in stock implementation of the VG30 protrudes at least 4 inches past the firewall into the engine compartment if not more.

It has to because the crossover pipe and stock plenum hang over the bellhousing.

I am well aware of your setup and your car is definately sweet but inches are inches and the tape measure does not lie.

I guess this discussion has now become an argument so I will provide pics of said engines including tape measure........not sure why I have to but I will.

Time passes............drives to junkyard.

Finds a Z31 with vg30 ready for measurements.

Next......a vg30 out of a Z31

I've circled (ellipse) around the head of the tape measure butted against the engine mating flange but it's tough to make a distinction since this engine is missing it's exhaust manifolds and crossover pipe.

Please ignore the L28et block/pan upside down as I needed a surface upon which to lay the tape measure so I could step back and take the pic.

Next a pic of the vg30 as installed in the car at the junkyard.

It is about 7 1/2 inches from the flange of the engine to the firewall......if you include the indentation.

Without the indentation, it is six inches so I was wrong about the 4 inches those two extra inches go even further to support my claims.

Sadly, I could not get my hands and the tape measure into that cavity but you can see a considerable distance the tranny bellhousing protrudes past the firewall.

Same area with tape measure against where throttle cables comes out of firewall......which is visible in the pic above.

And last........here's why it might be tough to fit a RB engine using the turbo crossmember.....unless you need the extra room to fit the turbo hardware but that requires a lot more engine mount bracket fabrication.

The N/A has both the left and right side even without the left side being moved way forward to clear the turbo in stock form. I still think nissan did z31s a big wrong by going this far and not going just a slight bit further so the turbo intake doesn't have to make that very sharp turn around the left engine mount.

Drives back from junkyard to snap pics of z31 turbo crossmember out of car.

Racinjitter, I fully respect you and covet your unique ride since it is sweeter than anything I have owned but arguing with someone who's been professionally working on Z31s as a Z car specialist starting at Z shop of miami in 1988 will always be an uphill battle rarely, if ever, won.

The last guy who proved me wrong was brewster at F31club.com in a discussion of FS5R30 tranny lengths when he proved to me the pathfinder version has the shifter location even shorter (27 inches from bellhousing flange to shifter stick center) than the version in the 1988 and 1989 z31 turbos.......which is shorter yet than the distance in the Z32 tranny.

I fully give props to anybody who proves me wrong but that's not why I frequent forums.

01-22-2009, 01:03 PM	#26
Howlermonkey Leaky Injector Join Date: Jan 2009 Location: west palm Posts: 107 Trader Rating: (0)	I think you are mistaking arguing with discussing. Nissan blazed this trail when they put a rb into a z31 body over 20 years ago. Now if you only have 1/2 inch between the firewall and the head, then the flange of your tranny as installed is indeed back further than in the stock implemention of the Z31's VG30. The mating surface of the tranny in stock implementation of the VG30 protrudes at least 4 inches past the firewall into the engine compartment if not more. It has to because the crossover pipe and stock plenum hang over the bellhousing. I am well aware of your setup and your car is definately sweet but inches are inches and the tape measure does not lie. I guess this discussion has now become an argument so I will provide pics of said engines including tape measure........not sure why I have to but I will. Time passes............drives to junkyard. Finds a Z31 with vg30 ready for measurements. Next......a vg30 out of a Z31 I've circled (ellipse) around the head of the tape measure butted against the engine mating flange but it's tough to make a distinction since this engine is missing it's exhaust manifolds and crossover pipe. Please ignore the L28et block/pan upside down as I needed a surface upon which to lay the tape measure so I could step back and take the pic. Next a pic of the vg30 as installed in the car at the junkyard. It is about 7 1/2 inches from the flange of the engine to the firewall......if you include the indentation. Without the indentation, it is six inches so I was wrong about the 4 inches those two extra inches go even further to support my claims. Sadly, I could not get my hands and the tape measure into that cavity but you can see a considerable distance the tranny bellhousing protrudes past the firewall. Same area with tape measure against where throttle cables comes out of firewall......which is visible in the pic above. And last........here's why it might be tough to fit a RB engine using the turbo crossmember.....unless you need the extra room to fit the turbo hardware but that requires a lot more engine mount bracket fabrication. The N/A has both the left and right side even without the left side being moved way forward to clear the turbo in stock form. I still think nissan did z31s a big wrong by going this far and not going just a slight bit further so the turbo intake doesn't have to make that very sharp turn around the left engine mount. Drives back from junkyard to snap pics of z31 turbo crossmember out of car. Racinjitter, I fully respect you and covet your unique ride since it is sweeter than anything I have owned but arguing with someone who's been professionally working on Z31s as a Z car specialist starting at Z shop of miami in 1988 will always be an uphill battle rarely, if ever, won. The last guy who proved me wrong was brewster at F31club.com in a discussion of FS5R30 tranny lengths when he proved to me the pathfinder version has the shifter location even shorter (27 inches from bellhousing flange to shifter stick center) than the version in the 1988 and 1989 z31 turbos.......which is shorter yet than the distance in the Z32 tranny. I fully give props to anybody who proves me wrong but that's not why I frequent forums. Last edited by Howlermonkey; 01-22-2009 at 04:09 PM..