IRP vs Coolerworx Comparison

milmast

Well please keep us updated on it as I am genuinely interested in going back to a chassis mounted shifter if the vibrations are to a minimal. I'm hoping the IRP works well ��

__________________
Z34 TS | R56 JCW | CS1 EX-L | FB6 Si
YouTube: milmast => http://goo.gl/1BsLa9
Instagram: milmast => http://goo.gl/8MWPBK

redondoaveb

It's going to be a while before my car's back on the road but I'll post an update. I like the design of the IRP. Very short reverse lockout cable. It doesn't wrap all the way around to the back of the shifter like the Coolerworx. And the cable runs through the center of the shifter shaft, unlike where the Coolerworx runs on the outside. The only issue, if it really is one is that it has a fixed shift knob, can't be changed out but it's a good shape so I think it'll be fine.

__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

redondoaveb

Here's the IRP and the silicone rubber pad I made for it

Attached Images

	PXL_20230106_232635229_copy_1512x2016.jpg (581.6 KB, 20 views)
	PXL_20230105_220740993_copy_1512x2016.jpg (612.0 KB, 22 views)
	PXL_20230105_222321629_copy_1512x2016.jpg (650.7 KB, 21 views)

__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

nismoskyz

Are you all running upgraded engine+transmission mounts? Sounds like a requirement for a chassis-mounted shifter. The relative motion between chassis and trans has to go somewhere.

I've tested CAE and Coolerworx in parked cars though and the direct engagement feels incredible.

redondoaveb

Trans mount for sure. I have a great deal on a brand new IRP shifter right now

__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

NorthStyle

I had the Z1 PU transmission mount, but I'm running the GKTech solid mount currently. Stock engine mounts, Z1 PU differential mounts and subframe collars.

My shifter is still rattle free.

redondoaveb

I wish mine would have been. I've got the new Pro version I'll be installing when my new motor goes in

__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

NorthStyle

New motor, was there something wrong with the old (current) one, or just a need for more speed?

redondoaveb

Just a rod through the block Going forged motor now

__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

ZoomZ

Pro version of what?

__________________
“Action without vision is a nightmare.”

redondoaveb

Coolerworx

Attached Images

PXL_20230909_170251054_copy_1512x2016.jpg (690.2 KB, 21 views)

__________________
Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

nismoskyz

Why did you switch from the PU to solid mount?

So stiffer transmission mounts are a must, but engine mounts could remain stock? I'm just trying to gauge how daily-driver friendly a chassis-mount shifter is. It sounds like not very :/

NorthStyle

I wouldn't be able to answer that as I had the Z1 (PU) transmission mount a year or two before I had the shifter installed. I went from the Z1 to the GKTech (I added the MTec return springs as well) after having the Coolerworx for 3-4 years because I recall someone saying that it would help with the 1st > 2nd gear delay that our cars have. Did it help? Yes, a little. Was it the cure-all I was hoping for? No. Not only that, it also increased the cabin NVH, so it's definitely not for anyone who doesn't want a rowdy experience... I do, so it stayed.

That being said: solid/stiffer engine mounts are not needed, I'm still on stock and I've had the Coolerworx for about 5 years now. Solid transmission mounts are most likely also not needed, but since you're going to be under the car, I'd recommend going ahead and upgrading to a PU and be done with it.

SeeThruHead

https://www.vibra-technics.com/nissa...smission_mount

i have one of these and i noticed no increase in nvh.
must have IMO

__________________
My Build thread STH Build Plan Thread
Images too big fix here

Averying

Did it actually improve shift feel on a stock shifter? I’ve never really liked the shift feel of the Z.

These are the first hardened rubber mounts I’ve seen for our car. Ik some people praise the hardened rubber instead of PU or solid for NVH reasons.


Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes