If anyone here has done a 3.5 conversion or swap from an MDX or Odyssey, please post here with any tips or info or PM me. Thanks!!!

I am contemplating doing a 3.5 conversion or maybe just swap the whole motor for a 3.5 from either an MDX or newer Odyssey. I have found good prices on both and they have the same power rating.

MDX 240hp, 245tq
02+ Odyssey 240hp, 242tq

Thanks for any and all help/info

 

For the price and hassle you'd be better off trading in for a Type S.

 

I don't recall anyone on this forum having a 3.5 conversion but theres austin519 over at a c u r a world.com

http://www.cardomain.com/id/austin519

 

I really can get a good deal on an engine. I only paid $10k for my car and TL-S is out of my price range. A cheap TL-S is still going to be about $15k which is 50% MORE than I paid for my car. My car has high mileage anyway so I think this would be a good way to give it a new start on life. I am planning on doing all the work myself so I won't have any labor costs involved. I have swapped many engines before so I'm confident I'm up to the task.

 

now why do you say that? you can build the 3.5 conversion for less than a supercharger

 

Really? Including labour?

What about ECU reprogramming etc?

 

the 3.5 conversion is cheap, between $2500-$3000 depending on what you want done, how built up it is, forged or not, and who does it and who gets the parts. It does not add a whole shit-load of HP, but as you can see, it adds a LOT of torque.

it is N-O-T better to trade up to a Type-S.

You could get away without doing any ECU mods, but the best way would be to get a VAFC or something.

In a perfect scenario, you could do 3.5, accord v6 supercharger, type-s heads, cams and throttle body, MDX intake manifold, CAI, pulleys, headers, exhaust, fuel pump/regulator and a few other small things here and there, then... THEN my friends.... your smoking. but this is in happy happy dream land, where none of us live

 

I can get the complete engine for about $1200, and If I am doing the labor, there's really nothing else involved, so....

The car already has headers, exhaust, and an intake. I would think that stock ECU could easily handle the increased displacement given that the correct injectors are used. The other option would be just to get an ECU and have a friend of mine make it work with the keys for the car.

 

So with all the members here, there is only 1 person that has done a 3.5 swap??? I would think people would be all over it. Most of the typical bolt ons won't give you much power. I would really like to talk to someone who has done it before I dive in. Any and all input is appreciated!

 

you're that same dud dreaming on aut-manual conversions also...dud, the 3.5 conversion will take about 2-3months and a good $2.5-3Gs just on labour. If your car has a lotta miles (over 100k) and you got the time...you should do it and then you'll have a TL that will last and kik ass for another 150000miles.

renting a small car could cost as low as 400/month...thats less than $14 a day w/ insurance and all those coverages things.

Oh, even with your 4speed tranny you should still kik type-S ass anyday...just know the aftermarket for mdx engine parts is very small unlike the type-S that has a lotta mods available.

 

Not dreaming about the manual convertion, just curious. I agree that it would take WAY too many parts and $$$ to complete that swap.

As far as the MDX swap, If I can get a complete engine for $1200, and do the labor myself, I wouldn't expierence the $2.5-3K in labor. I have 2 other cars to drive in the mean time. My car does have high miles (130k) that's why I'm planning on doing the swap.

 

Go for it.. www.cardomain.com/id/austin519 did the conversion and added the CT supercharger. He also beefed up the tranny. His car hauls...

 

You gotta be god damn good to do that yourself... If you know very well how to build a motor from scratch all by yourself, then hell, do it.

 

Yo men, if you got the tools, the knowlege, the engine and balls, the do it. 130k is a **** lotta miles. Maybe too high to start modding. when you're dont you'll have the first TL-P on MDX pills.

 

I'm not convinced the 3.5L conversion is all that less money than the S/C. I got my S/C for $3800 and installed for $800 so $4,600 total. Now the block and parts for the 3.5L is let's say $2,500 but is the labor to pull the engine, tear down the needed parts from the 3.2, build the 3.5L and then install it that much less than the S/C? Plus the added inconvenience of your car being out of commission. Anyone done the numbers? Also, what happens to the warranty (if you care) with the 3.5L? At least the S/C has a shot at a warranty with the right dealer.

 

The warranty would be voided once you start putting any parts other than stock, with in reason obviously, not the tires and rims but engine comonents, drive train, etc..

Plus I would assume with your supercharger.. even though they have a deal with acura, your warranty will also be voided once you added the supercharger.. The Icebox and headers I have heard of people saying that Acura will not void the warranty IF it is a Comptech part. But that doesn't include comptech springs.. think about it, you could use the lowest comptech spring and expect them to fix any problems under a factory warranty?? don't think so? the icebox and the headers I can understand but anything would void your warranty IMO.

Mind you the SC might have a warranty by itself..but I don't think the engine would be protected from that warranty or from the factory warranty once the SC is installed.

 

Here's where I'm going with this, I can get a COMPLETE 3.5 engine for about $1,200, I am planning on just swapping the whole thing. I am sure I could swap the heads or whatever was necessary from my 3.2. I have built several engines to include gaping rings and checking/adjusting bearing clearances on rods and mains. I was curious if anyone has even tried just swapping the entire engine for a 3.5. If I do all the work myself, even if I replace gaskets and such, it's going to be at most $2,000.

I'm not planning on doing this project for about a year, so I'm trying to research so I can have everything in line so it goes smooth. When I do go through with it, I will be sure to document everything and takes lots of pictures along the way. Thanks for all your coments!

 

Nope. The dealer is honoring the warranty, tranny and all.