turby3.2tl

I'm The proud owner of a 2002 TL-S. I've been interested in swapping the block out for a bigger one but don't know where to research my options. Can someone who is knowledgeable on this topic direct me to some diy threads or tell me where to get more info? I've come across a j35(xx) block from a 01' odyssey that can be had for cheap. Will this work? If so, what mods will need to be done, if any? Thanks in advance. I'm at work right now and typing this on my phone, so I will go for now but will check for any responses once I get home. If no one has replied, I will expand on the specific questions that I have regarding the j35(xx).

Skirmich

The J35A3 is a direct bolt on to our cars, No mods, No nothing needed except to swap the engine over. But remember that the J35 has less HP than the J32A2 in the TL-S you are gaining torque and losing HP with that swap.


The J35 swap is a lot better for the TL-p because they gain HP & TQ.

turby3.2tl

Even if I just swap the block and the crank and pistons? What if I have it bored over(how big can I go?),keep the heads from the j32a2 and use the intake manifold from the 09+ TL SH-AWD? Any recommendations on what cams to use?
And as far as current mods: cai, pilot mani spacer, Throttlebody coolant bypass, mid muffler and resonator delete replaced with glass pack then straight piped. Also planning headers and possibly under drive pulleys.

Skirmich

^ You need headers man.. Headers will possibly make alone all your current mods in HP&TQ gains.


About the Mods.
Your best bet if you want more powah is to get the 3.7L Crankshaft and Piston Rods to stroke your Current J32 to 3.6L < This requires no other mod nor machine your block this is basically PLUG & PLAY 3.2L to 3.6L. < This cost around +1K to do with Brand New OEM Honda Parts.


If you want the real 3.7L you must bore down your J32 Block by 1mm (89mm vs 90mm) and get the 3.7L Crankshaft, Rods and Pistons Heads + 3G TL-S hollow camshafts and you are looking at +300whp with a Manual. < This cost around +1.5K to do with Brand New OEM Honda Parts.




If you want to continue to use your J32A2 with the AUTO and just run it by bolt ons you are looking at 247-250whp which is what I currently get with all my Bolt ons. I believe running a J35 with the same bolt ons will net you almost the same HP but with at least +15-25lb of more Torque to the Wheels.

fsttyms1

The reduction in hp is from the ECU tuning, intake spacer and cams (this setup was to help gain in torque). If you want a 3.5 type-s swap over the cams and smaller horns inside the intake manifold and ditch the spacer.

Skirmich

^ Would not that defeat the purpose of getting the J35 in the first place?

fsttyms1

No. It will still make more torque than the J32, With the type-s parts it will make more power as well. The J35, along with the tuning in the mdx was designed to add more drivable torque lower in the band for the heavier vehicle.

Skirmich

mmm Good info! dat J35 swap is looking more and more doable by the minute...




But then the Swap is only Good for J32A2 guys if we do the "J35 Hybrid Type S" motor right? But coming from J32A2 and Just Swaping the J35 with no swap in TL-S parts its still good?

fsttyms1

I dont follow? If you have a A2 already swap the cams and remove the im spacer. You now have a 3.5 type-s motor. If you have a A1 and put it in you still have a 3.5 that is going to be the same as a stock A2, just more tq. There is NO downside to it.

turby3.2tl

Wow, you guys have given me a lot to think about. What about a 3.5 block with a 3.7 crank, rods and pistons, and J32a2 cams and IM without the spacer? What will be my overall displacement and what kind of power and torque will I get at the wheels?

fsttyms1

you will have to bore it to have the 3.7 pistons. If you do that with the 3.7 crank you will be 3.7

Personally i wouldnt use the J32A2 cams. Get the 07-08 type-s cams at minimum. As for power, that is all in the details and what else you have done.

turby3.2tl

So now I'm a little bit confused... The j37 bottom end fits directly into the j32 block with no machining necessary, but won't fit in the j35 block without boring it?

dannysayaseng

Healthy info! Question: would it be more beneficial towards swapping out my a1 to an a2 type-s rather than switching cams to make it a 3.5? vs just swapping in an a2 and get bolt ons. I am just listing different ideas.

I'm working on a 6 speed swap in the moment for my 99 and have a couple more parts to get and i feel like wanting to do everything lol.

fsttyms1

The crank has NOTHING to do with the bore, that is the piston dia. The crank fits in the J32A2 and J35A3 (exact same blocks) with slightly grinding a small amount of material on the end cap and block due to a spot on the J37 crank that the J32/35 doesnt have.

IF you want to use the J37 pistons you HAVE to bore both blocks. All J series blocks are 89mm bore EXCEPT the J37 which is 90mm. You can use the J35/32 pistons with the J37 crank but it wont be a 3.7, it will be a 3.6


This is the small grove that needs to be machined into the block/endcap. I did it with my angle grinder in about 5 min.

fsttyms1

Cams arent going to make it a 3.5. Only the crank is going to do that. That is why the J35A3 is a good engine to use. Its basically a 3.5 type-s motor, only thing its lacking is what i listed above. I picked up my J35A3 with low miles on it for 400 bucks.

dannysayaseng

i must have had a typo lol. i meant crank actually. so to confirm, switching out the crank would make it out to a 3.5? if i knew i was gonna do this swap, i would have saved money myself for a different motor but after reading endless forums these past couple of weeks, i've grabbed so many different ideologies.

i feel as if switching out the crank to make it a 3.5 would be a great bang for the buck along with the swap in a couple days if that would be the only thing i need?

fsttyms1

Why would you switch out the crank? If you do that you really need to rebuild the whole motor. Pick up a used J35A3, It is basically a 3.5 Type-S motor. IF you want to swap out the crank in that to a 3.7 crank and bore that block 1mm and get the 3.7 rods and pistons then you will have a 3.7. The J35A3 motors can be found all over the place for 4-600 bucks. What you want to switch out is the cams. You want to find a set of 07-08 TL Type-S cams or the 3.7 cams from the ZDX/MDX. They are hollow with aggressive profiles.

dannysayaseng

ahh, i see. i was just rounding up ideas of what i may do next and it seems to me that that is well worth it in a well-affordable range as well. thank ya!

turby3.2tl

You mentioned the 07-08 type S cams... What kind of gains can I expect to see with them and a pair of headers? Current mods: cai, intake spacer, mid-muffler & resonator delete, glass pack and straight pipes.