I have read many of the 3.5 engine swaps into the Gen-2 TL. What I have noticed is that there are parts needed from other engines to make a performance engine.

My alternate suggestion is to start with an alternate engine and transmission combination that can fit into the Gen-2. The engine should have the largest bore that Acura/Honda builds. Msn autos says that the 2001 MDX has Bore X Stroke (in.) 3.78 X 3.20 (http://autos.msn.com/research/vip/sp...=MDX&trimid=-1)

Then instead of looking for parts from other engines, modify the parts in the alternate engine.

I would start by modifying the cam to match the Gen-2 TL-S cam by regrinding.
Next would be to port the heads to use the larger valves.
Modify the crankshaft by increasing its stroke.
New connecting rods and pistons will have to be made to take advantage of the increased stroke. But they would be needed for the increased power.
Finally fit the engine with larger fuel injectors. such as the S2000 as has been suggested in another thread.

The new engine should be able to use its current harness and ECU instead of the one in the car or trying to find one that can be used with the modification

With this alternate strategy while the cost may still be close to the current strategy, you would be using either parts already fitted for the engine or making new parts to fit the engine. So cost would go into creating new high performance parts instead of purchasing used parts, and trying to mix and match parts would be avoided along with its price.

All the alterations to the engine and internals are being done to the big three v-8 engines.

Suggestions

 

Well the TL MDX RL all have the same bore of 89mm (for the year you gave) the difference in displacement comes from the crank 86mm vs 93mm.

Modifying existing parts is going to be much more costly than buying the oem parts. Remember we have 2 cams so you would have to have 2 cams reground.
New connecting rods made custom would be very expensive as well as modifying a forged crank. Also boring out this motor really isnt recommended due to the very thin cyl wall thickness. If you were to you would want to have the motor re sleeved with a stronger material. To do what you recommended would cost WAY more than making a "hybrid" motor of oem parts.

 

take the money and buy a gun

 

please dont ruin this thread. azine really lacks stuff like this and its post like yours that derail good threads.

as for the cam regrinnding. why not use the type-s heads and re seat the piston tops? it would be simpler.

and yield higher gains

 

years back, someone on the cl side had reground cams, they lost power, dont know if it was the way they were reground or the tunning.