Good luck. Can't wait to see a vid of the completed car.
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My J swapped NSX...sorry for the wait. love or hate
- Thread starter Rogue MotorSports
- Start date
Just saw this. I'm on a few other forums and have a J myself. Great stuff going on here, in for updates!
Also, I heard from a very knowledgeable J series guru that the J37a4 heads should flow the best. These heads are then followed by the J37a1 and then the J35a8. I believe the J35a8 stock heads were flow benched at 275 cfm for reference. I may try to install J37a1 heads on my J30a5 since they should definitely fit. I didn't read the ENTIRE thread, so I'm not sure which heads you are using, but you should check them out.
Also, I heard from a very knowledgeable J series guru that the J37a4 heads should flow the best. These heads are then followed by the J37a1 and then the J35a8. I believe the J35a8 stock heads were flow benched at 275 cfm for reference. I may try to install J37a1 heads on my J30a5 since they should definitely fit. I didn't read the ENTIRE thread, so I'm not sure which heads you are using, but you should check them out.
- Joined
- 7 March 2008
- Messages
- 175
I will be using the j32a3 platform. The heads flow 260ish. I had a set worked on that flowed nearly 300 but never got them back. There are a few reasons I am using this motor. They are dirt cheap and the c30 c32 trans bolts to it with very little work. Sorry for the lack of updates again. I have been very busy at the shop on customers cars, these pay the bills so they take priority. Good news the last should be finished this afternoon so back to mine tomorrow.
^ nice. i hope we can use a TL 6spd tranny as well. Would be nice to have transmission options too.
That's great, if all you want is a proverbial "dyno queen" / highway demon.
That response curve is horrid. :frown:
EDIT: Sorry, back to the greatness at hand...
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It's been a while since we've seen updates...Hopefully this project is not dying. I would love to see it completed and in action!
- Joined
- 7 March 2008
- Messages
- 175
Sorry for lack of updates again. I do have the mounts fully complete and I have pics. Just havnt uploaded them yet. I got robbed last week so everything has been a little hectic lately.
sorry to hear that. Hope everything works out for you and the thieves are caught!
Man! Cool project, just finished reading every page
Keep it up and sorry for the misfortune / theft issue!
Keep it up and sorry for the misfortune / theft issue!
- Joined
- 7 March 2008
- Messages
- 175
Thanks for the kind words. I will have a good update with pics later this weekend. Everything is falling into place. Almost ready to tackle the ems and wiring. Will be ready for startup shortley.
- Joined
- 7 March 2008
- Messages
- 175
Sent you a pm. Dont know how i missed it.
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Figured I would give an update with some substance. All of the tough parts are nearly figured out. I still need to do some testing with ac compressors and lines. Together with another memeber here, he will chime in if he sees fit, we have discovered a clutch solution for the 5speed trans. Hopefully it will work with the 6speed. Im not going to release much information on it right now.
From previous threads the full drivers side trans mount bolts up. The full rear mount bolts up. The front mount bolts with 2 out of the 3 factory bolts. The front mount just needs a small bracket made and it will bolt up with all 3. Im nearly finished with the passanger side conversion bracket. The bracket is used to bolt the j motor to the factory nsx passanger mount. I have attached a few pictures to see how i made it and give an idea what it does.
I have most of all the exhaust i need. Im going to build some custom exhaust for it, so i will be using the head flanges going down under the car at 2.5in to a x pipe, to 2 resonators, to 2 mufflers, then to tips. pics below, everything will be vband for easy assemblie/removal.
I also got a custom intake manifold on the way, it looks pretty sweet.
safty first.
exhasut.
new manifold.
Niceeee, i love it. I need to find a nsx with a blown motor now!
Nice
very nice progress, If you need any details on the transmission let me know if I can help.
Rogue, nice progress! Sorry to hear about the theft, that sucks!
Yes, I can confirm that the Comptech Powergrip flywheel that I have will bolt right up to the J32A2 crank flange. All you have to do is remove the pilot bearing from the flywheel. I polished the hub on the end of the crank flange just to smooth it out and make sure the flywheel slid on and off easy without binding because I knew I would be putting it on and taking it off a lot. The hole in the end of the crank is 24mm I.D. and about 12mm deep. The bearing end of the NSX 5 speed has a 20mm O.D. I found a SAE bronze bushing that is 24mm O.D x 20mm I.D x 16mm long, so I will have to take 2-4mm off of the end.
I have most of the wiring sorted out for the Cruise Control, Traction Control, A/C, Intake Runner Control and EVAP/Emissions Control. So if you need and of the wiring cross reference maps or wiring pigtails, just let me know.
If you know of a good source for the OBD2 Immobilizer bypass board, if you could PM me that would be great.
Also, If you want me to post any pics of the flywheel/pilot bearing info, just say the word. I really don't want to hijack your thread and will be starting my own shortly, I just need to get the front mount adapter bracket and the rear half shaft adapter bracket.
BTW, that is a sick intake manifold! I want one!
Yes, I can confirm that the Comptech Powergrip flywheel that I have will bolt right up to the J32A2 crank flange. All you have to do is remove the pilot bearing from the flywheel. I polished the hub on the end of the crank flange just to smooth it out and make sure the flywheel slid on and off easy without binding because I knew I would be putting it on and taking it off a lot. The hole in the end of the crank is 24mm I.D. and about 12mm deep. The bearing end of the NSX 5 speed has a 20mm O.D. I found a SAE bronze bushing that is 24mm O.D x 20mm I.D x 16mm long, so I will have to take 2-4mm off of the end.
I have most of the wiring sorted out for the Cruise Control, Traction Control, A/C, Intake Runner Control and EVAP/Emissions Control. So if you need and of the wiring cross reference maps or wiring pigtails, just let me know.
If you know of a good source for the OBD2 Immobilizer bypass board, if you could PM me that would be great.
Also, If you want me to post any pics of the flywheel/pilot bearing info, just say the word. I really don't want to hijack your thread and will be starting my own shortly, I just need to get the front mount adapter bracket and the rear half shaft adapter bracket.
BTW, that is a sick intake manifold! I want one!
More great progress. I wonder how many member's are paitently waiting for the TL 6 speed info.
From what I understand from reading all the progress. The issues are the clutch and flywheel (which ones to use) but with the new info above it seems like a nsx spec flywheel will work, just w a different pilot bearing. And there needs to be a way to adapt the shifter cables.
Please correct me if i'm wrong.
From what I understand from reading all the progress. The issues are the clutch and flywheel (which ones to use) but with the new info above it seems like a nsx spec flywheel will work, just w a different pilot bearing. And there needs to be a way to adapt the shifter cables.
Please correct me if i'm wrong.
- Joined
- 7 March 2008
- Messages
- 175
Thanks for all the info, and the help you have provided throughout my build. I can call my buddy, he hacks and bypasses the immobilizers in the pre 04 TL. I will see if i can get one sent to you, or have you send it to him. You can post anypictures you think will be helpful. The intake manifold was a custom piece. I will talk to the guy i got it from and see if he can cut another.
The problem using the TL speed was EVERYTHING would have to be changed/modified. In order to used the J series transmission you would have to build 4 new mounts (which i did), make custom driveshafts (would not be difficult) and build a custom shift linkage (very difficult task for me, i could not think of a good way to do it retaining the factory shift pattern and keeping it easy. I thought about heim joints, and a seperate linkage system, but either way it is much much more difficult than doing the NSX trans)
Another option would be to use a K series transmission. Its a great option as there are custom fd, and gearsets available for it as well as billet bell housings for the high high power cars. There is also a custom bottom mount linkage system available for the k series for the lotus users, which would adadpt to the nsx shift cables pretty easy. The difference is the k series starter mounts on the back, the j series mounts on the front of it. The bracket system mounts right where the starter sits on the j.
Hope that answers the question.
The info for the flywheel is in relation to an NSX transmission. I tested with an NSX 5 speed. The NSX 5 speed with the short gears is very similar in overall gearing to the NSX 6 speed and the TL 6 speed you just don't get that taller 6th gear. So using an NSX transmission simplifies the motor swap substantially. I don't think I would consider the J-swap if I had to use a J-series transmission.
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Hi Rogue, don't worry about the intake manifold for me yet, I really like it but I just need to focus on getting my car running again. I NEED to drive it. Also, I think I would want the lettering to face the back of the car, in the picture it looks like it will face the front of the car which is fine for a front engine but for the mid engine it should be readable from the back of the car.
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shawn110975
Suspended
I will be using this thread for my next project this thread needs to be voted best for this year. hands down
Thanks for clearing the info on the transmission up.
I just thought since the C trans bolted up to the J block. That a J series 6 speed was an option.
I just thought since the C trans bolted up to the J block. That a J series 6 speed was an option.
My thought for using a j series tranny was for an auto. If you can have 300+ hp and a 6 speed auto that brings new life to an auto nsx.
http://www.sunspeed.com/shifter1.html
$850 just for the linkage system...there goes the budget J series transmission swap idea...
Plus custom axles, custom motor mounts, etc.
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The J series transmissions are an option, just probably a much more difficult and expensive option.
