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Dual vtec on j35 engine. Put j37 heads on j35 block

 
Old 05-20-2019, 03:52 PM
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Dual vtec on j35 engine. Put j37 heads on j35 block

Looked into some discussions involving yungone501, justnspace, tarzanboy about using j37 dual v tec heads on older j30, 32 and 35 blocks

Seems like everything will bolt on. Some mentioned oil pressure needs to be a little higher to actuate dual v tec properly. Some said plenty of oil pressure in these engines already

Previously, with invaluable help over here, I bolted on Acura rl 2006 cylinder heads onto j35a6 engine(Honda Odyssey)

Everything works. Car is much faster .but most power is at 4500rpm+.
I dont like to rev engines a lot, especially minivans. 90% is city driving under 40mph. Have lots of gaskets leaking, cranks shaft gaskets. Valve stem seals.. so decided might as well rebuild everything . But this time I would like to achieve maximum low end torque. It looks like mdx dual v tec heads from j37 are profiled better for low end torque.

Is v tec mechanical, hydrolic actuation or it needs a signal from engine computer to engage. Basically if I find j37 dual v tec heads from mdx will I need to swap ecm? To accommodate dual v tec function
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Old 05-20-2019, 03:58 PM
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You will still need to rev the heck out of the engine as Vtec stands for Variable Valve Timing and Lift Electronic control. meaning two cam profiles...one for below 4500 RPM and a more aggressive profile for above 4500 RPM.

even if you switch out the heads, in order to make power, you will need to rev to the high heavens, meaning above 4500 RPM.This is how the engine is designed and makes PEAK power at like 6000 RPM.

a turbo motor is able to bring 300lbs of torque at as low as 1200 RPM.
Your N/A motor is designed to make 258-280lbs at 6000RPM...

call it a characteristic of The J-series engines.
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Old 05-20-2019, 04:10 PM
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Thanks for this reply. Good to see your presence)
I initially was thinking of putting j37 engine and transmission from zdx but it looks like it's only all wheel drive car. No front wheel drive option.
And it's a major project.

So from what's doable quickly in my situation I thought having dual vtec would be a good upgrade. Basically if this was already done I'd like to know all specifics. I am happy with power now. But I suspect valve guides are worn.. not just stem seals. And since I am replacing all gaskets might as well add dual vtec. Might pay a shop to install new valve guides and new valves on a used j37 cylinder heads.
Might do block works but that's another story and thread.
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Old 05-20-2019, 04:56 PM
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Perhaps this will give you more insight

https://acurazine.com/forums/3g-tl-p...etrain-908987/
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Old 05-22-2019, 11:23 AM
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Roman

Pretty informative thread. Seems like these threads are copy pasted in other sites. Read few posts on the thread somewhere else.

Noticed something promising.
Looks like Acura MDX 2010-13 has same bell housing bolt pattern as 2008-2010 Honda Odyssey. Maybe I can transplant mdx 2013 engine into my odyssey. Has anyone used odyssey transmission in any kinds of swaps. It's an auto transmission so I doubt it. Attached are images of mdx 2013 transmission and odyssey 2010 transmission

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Old 05-22-2019, 11:35 AM
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I believe one dude recently did the opposite...took the odyssey motor and transplanted into his TL.

Dude took the whole engine harness...that's what you would have to do, along with the enigne, you need the engine harness
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Old 05-22-2019, 12:06 PM
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So if mdx engine lines up with odyssey transmission
I just need to transplant ecu, harness, mdx ignition fob system (or reprogram later).

One thing I am not clear about

Does ecu also control transmission? That ecu on passenger side of engine bay is it for engine management only?
Does auto transmission have a separate ecu
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