What is the 3.5 Upgrade, how much power does it add? and how much is it?

BJ

 

From what I know I think somebody put the MDX camshaft on a CL...

 

Oy, it's the MDX crankshaft, pistons, etc. Changing camshafts does nothing to increase displacement..

Anyway it's a bump in displacemnt with a higher compression ratio and you KNOW what that does..

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00 Accord V6 Coupe
Equipped with Axis Sport | Toyo | Eibach | APC | Kenwood | GTS
02 3.2TL

 

Just a longer stroke? It is not bored is it?

Longer stroke gives more torque, at the expense of piston speed and usually results in lower redline, since lengthening the stroke tends to cause wobble at the piston crown.

 

I thought there would be a lot more to it than that since the price tag I saw was $3-4K??

 

Here you go.
http://www.acura-cl.com/ubb/Forum1/HTML/003069.html

GEN I 3.5L performance package - 315HP/260 lbft, $4999 installed. Includes engine only performance work. Status - 7 week waiting list, 5 work days build time.

Gen 1 includes: dommed topped pistons, mdx crankshaft, rods , bearings, heads ported and polished, vtec timing

GEN II 3.5L performance package - 335 HP/252 lbft, $6999 installed. Includes engine only performance work. Status - 3 week waiting list, 4 days build time.

GEN III 3.5L performance package - est 400 HP/310 lbft, est $11,999 installed. Includes engine and transmission performance work. This is a light pressure twin-turbocharged variant under R & D with an expected release in June, 2001. Transmission development has delayed overall program as trans has failed multiple times as power exceeded 360HP...current revisions show lots of promise to expedite release of this variant.

GEN IV 4.1L performance package - goal of 300 lbft of torque, Block development is underway and we anticipate a test cell dyno run in August, 2001. This is our cost effective alternative to pressurization. And no, we dont have plans to mate this with forced induction, for the street anyway...


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1999 Satin Silver Metallic 3.2 TL w/o Navigation

• 18x8 Racing Hart C2s with 225/40ZR18 Dunlop SP Sport 9000
• Comptech Springs, Sways, Exhaust, and Headers
• NEUSPEED Front Upper Strut Tie-Bar
• Red AEM CAI w/bypass valve
• A'PEXi Digital VTEC AFC
• Denso Iridium Plugs
• Custom Mugen Grill
• Inspire Tail Lights
• Factory Underbody Kit and Spoiler
• Clifford Intelliguard 9000 Alarm w/SmartWindows II
• Alpine 6 disk CD Changer
• BEL 945i Cordless Radar Detector
• Burlwood Shift Knob & Trunk Tray
• 20% tint
• Rustoleum treatment
• Too many coats of Zaino to keep track

Fogs lights very soon

 

Yup... only a stroke increase. Bore remains the same.

You're right about the "side effects" of a longer stroke, too, but I believe they use custom pistons which means the piston pin location could be altered which would alleviate some potential problems.

I've ridden in the 3.5L Type S many times and it winds up to 7000 without a hitch. It's got a lot of well-seasoned miles on it and it's still going strong... so their [Rick Case's] recipe is pretty good as far as I'm concerned.


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2000 WDP 3.2TL non-NAV
AEM CAI w/bypass, Comptech header

 

Nice explanation - sounds very interesting - may be in my future when the warranty goes away.

Still, some of those power increases without other drivetrain beefing makes me nervous - any opinion or modifier input as to the strength of the beefed-up TL-S transmission, axles, wtc.?