Chickenwafer's Never Over Turbo 8 Build

[Whizbang]

So I haven't been here in a while

Figured I could bump this with some updates:

First is I dyno'ed last weekend. After some issues with my boost controller my boost was seriously limited and I couldn't get boost to peak over 13.5psi

First run was on lower boost at 10.5psi or so:



Ended up with 317-rwhp and 287 ft-lbs of torque. After reviewing the logs of the run it turned out my knock sensor was picking up noise from the dyno rollers and pulling up to 10 degrees of timing at torque peak!!

I basically turned the knock sensor off, LOL, and did another run at 13.5psi, which was the max my GReddy E-01 was letting me do (I found up later I had it setup wrong, doh!)



330-rwhp and 326 ft-lbs of torque! Holy balls that's a lot of torque, haha.

That pull was at 13.5psi peak and trailing down to 9psi by 8,000 rpm. I also found out I was running a pretty high timing split so I was able to clean it up but I ran out of time on the dyno so I couldn't make a pull with the new map



So then the other day I was getting my boost controller settings figured out and tuning it on a back street. Was hitting 14psi by 3900rpm and it was feeling rather brutal! The spool was intensely quick. So I did a run, and boost was falling off slightly, so I pulled over and made adjustments, then went for another run....

I hit 14psi before 4k and started to spin tire a little, but like an idiot I stayed in the throttle and the tires hooked back up. BANG! My shifter popped out of 3rd gear and the transmission started making death noises...

I quickly clutched in and tried to shift into 4th, but it wouldn't. I coasted into a parking lot and after a minuet or so of frustration I was able to get it into a drive gear and limp the car home. Motor is fine, but transmission is pretty bad. I'm almost positive the shift fork for 3-4 is bent and all my syncro's are gone, LOL.

My trans has been an issue really for the last 10,000 miles, tho. It's grinded 2nd, 3rd and occasionally 4th. And about 1500 miles ago went I swapped fluid for Redline MT90 there was a shift detent ball stuck on the magnet of the drain plug. So I knew the tranny was a time bomb.

Plus these 6-speed Aisin gearboxes are just trash. Which is why I am considering doing an FD RX-7 5-speed gearbox swap.

The biggest hurdles of the FD gearbox are:
-Transmission is longer and shifter doesn't line up, but it's not off by much (about 4"). Apparently you can cut down the linkage and move the shifter forward by the amount required
-Obviously mounting locations are different. The stock 8 trans is mounted on the passenger side to the PPF and the FD trans is mounted on the driver side and bottom from what I have gathered. So custom mounts are required. I am going to keep the stock RX8 PPF.
-The RX8 is a push type clutch, FD is a pull type clutch? Or so I have gathered, maybe some people here can shed light on this...
-Custom driveshaft is required since the RX8 carbon fibre unit is too long and the FD unit is too short. I need a driveshaft roughly 13 inches longer than the FD d-shaft.

The Good news:
-Bellhousing bolts right up
-Uses the same 240mm flywheel and clutch combo like the RX8 so I don't need to swap any of that stuff (luckily too since I have a lightweight billet Fidanza fly and ACT Stage 2 clutch already)
-FD transmission is much stronger, cheaper, easier to find, easier to get rebuild kits, etc than the RX8 6-speed gearbox. I can pick up an FD trans all day long for about 1/3 to 1/4 of the cost of a used RX8 gearbox. So even if the initial cost of the swap is more expensive than just throwing another RX8 gearbox in, it will pay for itself once I don't blow anything LOL

So that is where I am at right now. I was also wondering if I could use the Re-Amemyia D1GP short shifter (don't see why not) and if it's a good shifter? FD guys? Here's a link: http://www.corksport.com/re-amemiya-...r-for-rx7.html

So I am still weighting options. I have a line a stock RX8 trans for $500 + Ship or I can pick up an FD trans for under $300 bucks. If anyone here is selling an FD trans and wan't to hook a brother up let me know! Haha. Even if someone has a completely BLOWN FD trans I will pay for shipping if you can send it to me so I can use it for mock-up and see if it's even worth it.

Thanks guys

[chickenwafer]

So I haven't been here in a while

Figured I could bump this with some updates:

First is I dyno'ed last weekend. After some issues with my boost controller my boost was seriously limited and I couldn't get boost to peak over 13.5psi

First run was on lower boost at 10.5psi or so:



Ended up with 317-rwhp and 287 ft-lbs of torque. After reviewing the logs of the run it turned out my knock sensor was picking up noise from the dyno rollers and pulling up to 10 degrees of timing at torque peak!!

I basically turned the knock sensor off, LOL, and did another run at 13.5psi, which was the max my GReddy E-01 was letting me do (I found up later I had it setup wrong, doh!)



330-rwhp and 326 ft-lbs of torque! Holy balls that's a lot of torque, haha.

That pull was at 13.5psi peak and trailing down to 9psi by 8,000 rpm. I also found out I was running a pretty high timing split so I was able to clean it up but I ran out of time on the dyno so I couldn't make a pull with the new map



So then the other day I was getting my boost controller settings figured out and tuning it on a back street. Was hitting 14psi by 3900rpm and it was feeling rather brutal! The spool was intensely quick. So I did a run, and boost was falling off slightly, so I pulled over and made adjustments, then went for another run....

I hit 14psi before 4k and started to spin tire a little, but like an idiot I stayed in the throttle and the tires hooked back up. BANG! My shifter popped out of 3rd gear and the transmission started making death noises...

I quickly clutched in and tried to shift into 4th, but it wouldn't. I coasted into a parking lot and after a minuet or so of frustration I was able to get it into a drive gear and limp the car home. Motor is fine, but transmission is pretty bad. I'm almost positive the shift fork for 3-4 is bent and all my syncro's are gone, LOL.

My trans has been an issue really for the last 10,000 miles, tho. It's grinded 2nd, 3rd and occasionally 4th. And about 1500 miles ago went I swapped fluid for Redline MT90 there was a shift detent ball stuck on the magnet of the drain plug. So I knew the tranny was a time bomb.

Plus these 6-speed Aisin gearboxes are just trash. Which is why I am considering doing an FD RX-7 5-speed gearbox swap.

The biggest hurdles of the FD gearbox are:
-Transmission is longer and shifter doesn't line up, but it's not off by much (about 4"). Apparently you can cut down the linkage and move the shifter forward by the amount required
-Obviously mounting locations are different. The stock 8 trans is mounted on the passenger side to the PPF and the FD trans is mounted on the driver side and bottom from what I have gathered. So custom mounts are required. I am going to keep the stock RX8 PPF.
-The RX8 is a push type clutch, FD is a pull type clutch? Or so I have gathered, maybe some people here can shed light on this...
-Custom driveshaft is required since the RX8 carbon fibre unit is too long and the FD unit is too short. I need a driveshaft roughly 13 inches longer than the FD d-shaft.

The Good news:
-Bellhousing bolts right up
-Uses the same 240mm flywheel and clutch combo like the RX8 so I don't need to swap any of that stuff (luckily too since I have a lightweight billet Fidanza fly and ACT Stage 2 clutch already)
-FD transmission is much stronger, cheaper, easier to find, easier to get rebuild kits, etc than the RX8 6-speed gearbox. I can pick up an FD trans all day long for about 1/3 to 1/4 of the cost of a used RX8 gearbox. So even if the initial cost of the swap is more expensive than just throwing another RX8 gearbox in, it will pay for itself once I don't blow anything LOL

So that is where I am at right now. I was also wondering if I could use the Re-Amemyia D1GP short shifter (don't see why not) and if it's a good shifter? FD guys? Here's a link: http://www.corksport.com/re-amemiya-...r-for-rx7.html

So I am still weighting options. I have a line a stock RX8 trans for $500 + Ship or I can pick up an FD trans for under $300 bucks. If anyone here is selling an FD trans and wan't to hook a brother up let me know! Haha. Even if someone has a completely BLOWN FD trans I will pay for shipping if you can send it to me so I can use it for mock-up and see if it's even worth it.

Thanks guys