Looking into a j35a8 swap into my '01 Prelude. I've got most of what I need figured out.
Here is my swap parts list and my wishlist for internals/supercharger:
It's a link to a Google Docs word document.
https://docs.google.com/document/d/e...C-f9jmCCE7/pub
I plan to run a TL Type-S 6 Speed trans. (If I can even find one when the time comes)
What I can't seem to find is info or anyone who has done the swap on a bb6 and has listed what axles they used for the driver's side.
I know an oem ’08 TL Type-S axle will work for the passenger’s side. I found a swap thread where someone did this same swap and said this axle works perfectly with the TL 6 Speed and the bb6 hub.
Anyone know what complete axle or parts of different oem honda axles will work?
My only other questions:

• What can you use for radiator hoses?
• What works for the fuel lines?
• Can you use a stock Prelude clutch master or do you need a 6 Speed Accord or TL one?
• What is involved with the immobilizer system?
• What is involved wiring wise?

For anyone looking into any J series swap into a 5th gen Prelude, here is what I've found you will need:

• J30, J32, J35 Motor w/ all sensors
• '04-'08 TL Type-S Trans or '03-'07 Accord Trans and a matching Clutch/Flywheel
• 6 Speed Engine Harness (Unless you want to modify a automatic one)
• ECU
• Swap Mounts
• Shifter and Shift Cables
• Starter
• '08 TL Type-S Axles (Passenger Side)
• Driver's Side Axle
• Custom Radiator Hoses
• Custom Clutch Line/Fittings
• OEM J Series Headers/ J Pipe
• Custom Fuel Line/Fittings

Thanks fellas,
-Ian

 

Here's a thread on here where the OP put a J-series into his prelude. It may answer some questions for you. https://honda-tech.com/forums/hybrid...elude-3196130/

- For radiator hoses, you can use the stock J-series ones if you use the TL/CL radiator. A lot of civic/integra guys use the stock half-size radiators, but relocate it to the opposite side and use the TL/CL hoses. Custom is always an option though.
- For fuel lines, the inlet for the fuel rail is about the same location as the H-series, except on the opposite side of the bay. Earl's/JEGS/etc. fittings and hoses may be your only option to make it fit, unless you use the CL/TL OEM one.
- Stock prelude CMC will work fine, but you will have to bend the stock line to fit, or use a custom soft line.
- For the immobilizer, you can open the ECU, find the immobilizer and bend it back and forth until it breaks off/comes out. The motor will run, but you will have a CEL for the immobilizer system. A better option is to send it to HAmotorsports https://www.hamotorsports.com/immobi...l-service.html and have them remove it, and solder in a "bypass" chip that is supposed to eliminate the CEL.
- For the wiring, check J32A.com. Wiring will depend a lot on the ECU, harness, engine and transmission you choose. Specifically on which motor you go with. The majority of the sensors are different between the automatic and manual versions of each motor. As absurd as that sounds, it's very true. Crank sensors, Cam sensors, etc are different between the automatic and manual versions of the motor.

Hope this helps!

 

Very helpful actually, thanks. I had no idea the sensors were different between auto/manual cars. I'm used to the d/h/f series motors, haven't had alot of hands on experience with the j series.
So as far as rad hoses/clutch line/fuel lines its all sort of custom and finding out what works really, thats sort of what I figured.
I understand the engine harness connects to all the sensors on the engine then the other end connects to the ecu, I'm just not sure what else is involved.
Is that all the engine harness does on a '04-'08 TL? Just runs between engine and ecu? I might run a TL cluster in my Prelude as well, im not sure what that means for wiring when it comes to the TL engine harness or dash harness.

 

The engine harness will plug directly into the ECU, however, you'll notice that you'll have an open spot for a plug on the ECU. This is for outputs to things such as your gauge cluster, fuel pump, etc. You're gonna need a manual with a wiring schematic to figure out which wires go where, and possible a plug with wires from a spare harness. I got mine new from Ballinger Motorsports; this one if I remember correctly: https://www.bmotorsports.com/shop/pr...oducts_id/3466 Then run the necessary wires to items such as the cluster, main relay, etc...

If you do not use the TL cluster in your prelude, and decide to use the stock one, you're going to need some sort of RPM converter. Since the V6 VSS has six pulses, and the prelude only has four, your RPMs will be off. If you use the TL cluster, you should be fine.

 

Like this?

 

Yep. Exactly. If I remember correctly, there is a reverse lock-out wiring coming from the "Interior/Dash Harness" group of wires that needs to go to the transmission, but that's it. - If I remember correctly.

 

I wanna do it, parts $ total comes in just under $4.5K, I got $5K in the car and its in minty shape.

 

I plan to use a UA7 gauge cluster, going to have to figure out the wiring for that. I'll be using the VSS from a UA7 on the 6 speed trans so that should work for speedo and since the engine is from a UA7 the tach should work fine. I'm just concerned about CEL & Immobilizer.

 

So I run the engine harness from a UA7 6spd J35A8 motor, connect up all the sensors and run it into the ecu, then what sort of other connections need to be made? ECU -to- UA7 gauge cluster, OBDII port, main relay, fuel pump? Anything else? What about the ignition switch? Can I use the stock Prelude switch?

 

I've read as far as axles go that a UA7 6spd OEM Passenger's Side Axle will fit both the trans and the Prelude hub (which I already posted) but I have also found that for the Driver's side an '03 CL Type-S 6spd OEM axle will fit both the trans and Prelude hub. Can anyone confirm?

 

For the immobilizer, you can send the ECU to Xenocron in NY, they can remove the immobilizer and put in their "mobilizer" chip in its place.... completely removed it AND you won't have any CELs....you may have to override the starter cutoff part of the system, but if it's anything like my Prelude that just involves jumping a wire under the dash, and doesn't throw any CELs...I just had them install one of their chips in my P5M for my 99 Prelude, and it works perfectly and only cost me like $75 to have them install it. Turn around time was less than a week.