Forced Induction & 7AT 370z Info

DarkJak · 02-23-2024, 02:56 PM

Thanks for confirming the driveshaft is indeed shorter on the shaft needed for the swap. Had someone on FB swearing a driveshaft spacer would work, and I think this settles it for me.

You're saying their steel driveshaft is a better buy than their more expensive aluminum one? or just that it'd be better to get one made locally due to balance issues with theirs?

Tractionless · 03-02-2024, 09:46 AM

Quote:

Originally Posted by DarkJak

Thanks for confirming the driveshaft is indeed shorter on the shaft needed for the swap. Had someone on FB swearing a driveshaft spacer would work, and I think this settles it for me.

You're saying their steel driveshaft is a better buy than their more expensive aluminum one? or just that it'd be better to get one made locally due to balance issues with theirs?

Let them put the spacer in to find out the Z shaft is now WAY longer than what's needed

.

I don't know if a steel is better, it's definitely heavier. Godzilla swore up and down it's balanced and in fact was 21 grams out of balance at my local driveshaft shop. Sent them the invoice for balancing the $750 shaft that should have been ready to go out of the box. I spent 2 hrs. indexing to the rear end, 3 hours in drive time to and from the shop, and $75 for the balancing service.

We'll see if they issue a partial refund but they're already were deflecting asking what my driveline angle is, what the spacing is between the shaft flange from the tail shaft housing, and noted that I didn't buy their $200 trans. mount when their instructions clearly say it's not necessary and just a luxury if you don't want to hack your OE mount like I did.

Driveline angle changes negligibly with the tail shaft housing only 1/2" closer to the rear end. So that's laughable.

Spacing at the front driveshaft flange is a direct correlation to their shaft length NOT any installation mistake as the transmission position is dictated by where the engine flange is located (no change) and the rear end position is fixed. So the distance from the engine flange to the rear end flange stays the same with the VR trans being 1/2" longer and new driveshaft 1/2" shorter than OE. If the spacing from the tail shaft housing to the driveshaft flange is wrong that would be an effect of their driveshaft length.

BTW, I didn't touch the driveline angle nor spacing at the tail shaft, only had their shaft balanced and the vibration is gone!!!

SG4247 · 03-02-2024, 01:16 PM

Thanks for the update!

My VR30 transmission is on the way, should be here next week.

Engine is all fresh and ready to go back in.

I will not be ordering a driveshaft or cross member from Godzilla.

Spooler · 03-02-2024, 04:05 PM

Just call Drive Shaft Shop, aka DSS, up and they can make you a custom carbon fiber driveshaft. It is $1800 dollars, Just $200 dollars more than a stock manual transmission driveshaft Carbon Fiber drive shaft. I put one in my Z when the factory U-joints were on the way out this last rebuild.

rspray2000 · 03-02-2024, 04:08 PM

Quote:

Originally Posted by Tractionless

Let them put the spacer in to find out the Z shaft is now WAY longer than what's needed

.

I don't know if a steel is better, it's definitely heavier. Godzilla swore up and down it's balanced and in fact was 21 grams out of balance at my local driveshaft shop. Sent them the invoice for balancing the $750 shaft that should have been ready to go out of the box. I spent 2 hrs. indexing to the rear end, 3 hours in drive time to and from the shop, and $75 for the balancing service.

We'll see if they issue a partial refund but they're already were deflecting asking what my driveline angle is, what the spacing is between the shaft flange from the tail shaft housing, and noted that I didn't buy their $200 trans. mount when their instructions clearly say it's not necessary and just a luxury if you don't want to hack your OE mount like I did.

Driveline angle changes negligibly with the tail shaft housing only 1/2" closer to the rear end. So that's laughable.

Spacing at the front driveshaft flange is a direct correlation to their shaft length NOT any installation mistake as the transmission position is dictated by where the engine flange is located (no change) and the rear end position is fixed. So the distance from the engine flange to the rear end flange stays the same with the VR trans being 1/2" longer and new driveshaft 1/2" shorter than OE. If the spacing from the tail shaft housing to the driveshaft flange is wrong that would be an effect of their driveshaft length.

BTW, I didn't touch the driveline angle nor spacing at the tail shaft, only had their shaft balanced and the vibration is gone!!!

Sorry to hear about your troubles. FWIW, I got aluminum driveshaft from them ~2 years ago (no housing) and have been running it a year without issue.

Tractionless · 03-07-2024, 01:45 PM

Quote:

Originally Posted by rspray2000

Sorry to hear about your troubles. FWIW, I got aluminum driveshaft from them ~2 years ago (no housing) and have been running it a year without issue.

I'm glad you had good luck. So far they haven't answered my email requesting a partial refund for the additional cost of balancing the shaft they sent me.

SG4247 · 03-09-2024, 08:07 PM

I swapped the TCU from my 2010 into the 2018 VR30 trans valvebody. Kept the original VQ30 solenoids with the 2018 VQ30 valvebody.

I notched the Bellhousing also for the crank sensor. Went a little big on the hole saw I guess.

Tractionless · 03-10-2024, 12:55 PM

Quote:

Originally Posted by SG4247

I swapped the TCU from my 2010 into the 2018 VR30 trans valvebody. Kept the original VQ30 solenoids with the 2018 VQ30 valvebody.

I notched the Bellhousing also for the crank sensor. Went a little big on the hole saw I guess.

Much nicer crank sensor hole than my square one. I did cover the OE one though so nothing falls from above into the bellhousing.

Tractionless · 03-10-2024, 01:01 PM

There's a little difference between the Z gearing and VR30. I don't notice it seat of pants.

Z

1st 4.924

2nd 3.194

3rd 2.043

4th 1.412

5th 1.000

6th 0.862

7th 0.772

R 3.972

VR30

1st 4.783

2nd 3.103

3rd 1.984

4th 1.371

5th 1.000

6th 0.871

7th 0.776

R 3.859

DarkJak · 03-13-2024, 10:24 AM

Quote:

Originally Posted by Tractionless

There's a little difference between the Z gearing and VR30. I don't notice it seat of pants.

Z

1st 4.924

2nd 3.194

3rd 2.043

4th 1.412

5th 1.000

6th 0.862

7th 0.772

R 3.972

VR30

1st 4.783

2nd 3.103

3rd 1.984

4th 1.371

5th 1.000

6th 0.871

7th 0.776

R 3.859

3 percent longer in 1-4, about 1 percent shorter 6 and 7.

Mildly preferable given our cars have more power than stock I guess, though yeah, doesn't seem like it'd be noticeable.

EDIT:
Just put my order in for an aluminum driveshaft.
Now seeing if Z1 will actulaly ship my flex plate by end of April as they indicated last year.

Anyone got video of the shifting on the 370Z after the swap?

SG4247 · 03-22-2024, 08:50 PM

Made my VR30 driveshaft 3/4” shorter than the original 370Z carbon driveshaft.

Center to center on the u joints looks like 1” difference but the aftermarket yoke and flange are slightly different dimensions than OEM so it’s really 3/4” shorter flange face to front yoke spline end.

I measured both transmissions from Bellhousing to output shaft and saw about 3/4” difference.

Hope this helps someone.

SG4247 · 03-24-2024, 05:33 PM

Shocked at the weight difference.

SG4247 · 03-30-2024, 07:48 AM

Some VR30 RE7R pics

SG4247 · 04-08-2024, 08:47 AM

Engine and VR30 trans wiring mounts for O2 sensors. VR30 transmission does not have bosses to mount the 02 harness bracket but there are a couple of bolt holes the can be used on each side of the Bellhousing. I used 1” wide x 1/8” aluminum flat bar.

shadow85 · 04-15-2024, 05:15 PM

when doing VR30 swap, is this worth it:

https://sohomotorsports.com/products...smission-mount

OR should I get fab shop to custom make it?

02-23-2024, 02:56 PM	#376 (permalink)
DarkJak A True Z Fanatic Join Date: Jun 2011 Location: Madison, WI Posts: 1,390 Drives: 2009 370Z Rep Power: 13448	Thanks for confirming the driveshaft is indeed shorter on the shaft needed for the swap. Had someone on FB swearing a driveshaft spacer would work, and I think this settles it for me. You're saying their steel driveshaft is a better buy than their more expensive aluminum one? or just that it'd be better to get one made locally due to balance issues with theirs? __________________ @stupidtoycars \| My track vids 09 7AT\|MCS 2WNR\|Topgunz Rotrex\|Ecutek (Eugene)\|Maxxis RC1\|Titan-7 TS-5\|OSG LSD\|Rear Mount Derale Oil Cooler (WIP)+25 Trans Cooler\|Fismo\|G-LOC R12/R10\|Zeta III L\|NLR Wing and Splitter\|CJM Pan and Fuel Hat\|Radium Surge Tank\|AP Racing CP9668

03-10-2024, 01:01 PM	#384 (permalink)
Tractionless A True Z Fanatic Join Date: Jan 2016 Location: Atlantic SE Posts: 1,237 Drives: '10 K23 ST 7AT Rep Power: 30525	There's a little difference between the Z gearing and VR30. I don't notice it seat of pants. Z 1st 4.924 2nd 3.194 3rd 2.043 4th 1.412 5th 1.000 6th 0.862 7th 0.772 R 3.972 VR30 1st 4.783 2nd 3.103 3rd 1.984 4th 1.371 5th 1.000 6th 0.871 7th 0.776 R 3.859 __________________ Toys Not Tots Last edited by Tractionless; 03-10-2024 at 01:03 PM.

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03-02-2024, 04:05 PM	#379 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,515 Drives: 2013 Nismo 370z Rep Power: 2684391	Just call Drive Shaft Shop, aka DSS, up and they can make you a custom carbon fiber driveshaft. It is $1800 dollars, Just $200 dollars more than a stock manual transmission driveshaft Carbon Fiber drive shaft. I put one in my Z when the factory U-joints were on the way out this last rebuild.

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