Z32 to SR transmission upgrade!! pics tonight

[ou1848]

This is a post to gauge the interest in a Z32(300zx) transmission upgrade for the SR20. I recently got hooked up with an excellent fabricator and we are trying to sort out the details and feasability of this swap. He has finished the adaptor plate and mounted it to the SR while using the stock clutch and starter. There are a few things to sort out like the shifter and driveshaft, but these also seem to be small hurdles.

he will send pics later tonight so stay tuned.

mark

[USsil80]

what about the input shaft.. did you extend it.. also what is the 300z transmission good for... and what will it do to the gearing in the car..thinking this will be the way to go for anybody making more than 400whp..way to go

[ou1848]

the way it is done..is the Z32 trans is machined down to allow for attachment of an adaptor plate. This plate is bolted to the SR and then the trans is mounted to the adaptor plate. The machining process is such that the input shaft will fit right into the back of the motor without changing the length. The stock clutch will be used as well as the stock starter.

The Z32 is good for about 700hp. The gears are MUCH beefier as is the output shaft, which is much shorter. The driveshaft will have to be custom but can be made for a few hundred.

In terms of the gearing..i don't have the numbers off hand, but just looking at the ratios, they are actually very close to the SR.

thanksmark

[ou1848]

Ok...here are some of the firs pics.The plate looks awesome. Very high quality! I sent some followup questions to him and will relay the responses soon.

plate bolted to block

closeup of plate



Z32 trans on bottom compared to an SR trans above with the OS giken Crossmission....compare the width and thickness of gears.



input please

mark

[USsil80]

is this going to be avilible on the consumer side of things... there are bolts below where your plate stops.. what do you plan to do with that

[ou1848]

that is one of the questions I asked my dude. I'm not sure if he's planning another plate on the bottom, or just make a complete cirlce to encorporate the oilpan. I will push the have one big ring to mount to block and oilpan.

mark

[ou1848]

Actually if you look at the top picture which shows the Z32 bellhousing sitting on the block...you will notice that the bellhousing is machined so there is a notch in it to fit around the adaptor plate. I have not talked to my fabricator yet about it...but i think the bottom bolts are close enough and only require that notch for the bellhousing to fit around the plate.

mark

[USsil80]

does the plate bolt to the block then the trans to the plate.. or is the plate going to be welded to the block

[ou1848]

the adapter plate will bolt to the block and have recessed holes for the bolts. Then the bellhousing is machined so it bolts to the adapter plate at the block side and then sits flush on the bottom by the oilpan. the only bolts that will secure the trans are those to the block side, NOT the oil pan side.

mark

[USsil80]

and any idea how much this will cost... or if they will make it on the consumer side of things

[ou1848]

Yes this will be available on the consumer side

the cost will be around 500$ for the adaptor plate, the modified, machined bellhousing, new transmission mount and all new grade 8 bolts.

the kit is being developed by a company called Mazworx who specializein custom drag and racing hardware.

mark

[s13sr20chris]

awesome bro! one question. i thought the os crossmission was a dog gear setup?

[ou1848]

there are a few different types of OS crossmissions. I don't have all the details but you can look up on the OS giken website what is offered for the SR. Last I checked it was ALL dog gear like you said..but some of the other kits incorporate a syncro/normal type gear for first gear.

so i have a few other pictures for you all

machined bellhousing

adapter plate

clutch slave cylinder240 on left, Z32 on right

clutch slave mounted to bellhousing

ok...that's it for now..

mark

[USsil80]

wow that is a really god price... me thinky me likey... yea i have heard of that company before(if memory serves me right).. .i like this alot thanks for the info

[ou1848]

we're going to be ready for test fitment by the end of the week...which means test drive hopefully in 2 weeks.!!

keep you postedmark

[ou1848]

here are some pics of the custom shifter assembly



hope you like it

[USsil80]

that looks awsome... looks like the shifter isn't hooked up... is it???

[240DRFT]

wait so r u using a z32 transmission on a sr20? or the other way around?

[USsil80]

maiting a 300z transmission up to a sr20det... the pics should be enough ...look at them the block only has 4 big holes

[NISTECH]

Nice man. So how thick is the adapter plate?

[ou1848]

well the transmission adapet kit is now complete and readyfor the general public.

thanksmark