jimcol711

good question, id never waste my time at an 1/8 mile track, it doesnt give a 100% accurate indication, and its definately not as fun.....you gotta take that beast to a REAL track and get some REAL numberS!!

darrinb

typeR, can you tell what you did to get ready for the track


tire psi, ss or gate shift, what rpm did you launch, what rpm you shift at, gas level, etc.

Thanks, this would help me out since i'm goin to the track saturday.

Manus1980

TypeR,

Have you modified your 3.5L engine at all? I drive an MDX and have a custom intake and it defineatly added some hp. I think I'm going to be getting some pulleys for it as well when I get a chance.

typeR

ok...ill try to answer all at once...the 1/8th mile is 1/2 hour away and it's just as fun...and not only that it's more like what you'd do on the street...
race prep was let the gas get low...i have permenantly removed my jack and spare meaning i dont just take it out for the track...i ended up lowering the fron pressure alot to keep from going up in smoke but the MPH did suffer...spring spacers in the rear to help minimize rear end squat and the rear pressure at 72 psi

this engine though it has the same discplacement as the MDX has little else except the block that's the same.

Manus1980

Is your 3.5L from a Honda or what? If it is Honda made, list what you have done to it, for example headers.

AgentDSS

I believe his are from a MDX

Seattle Cl-S

http://www.geocities.com/~gamesmgr/chod/acura/#Mods17

DISRUPTV

wow is the GENII actually available???

typeR

sure GENII but itll cost you more

Manus1980

TypeR,

Can you break the conversion down so I can understand. What modifications does Gen I and II consist of and is any of the mods affortable(under $500)?

mattg

JRock

Chod's FAQ is so out of date.

Anyway, a couple weeks ago the guy from rick case acura posted here and said it's $2500 for the 3.5L upgrade.

No, parts from the MDX are not used - that's a totally different block. They just stroke our 3.2L. You basically get a set of new pistons, etc, to put in the stock bottom end. Crank figures: 300hp/260torque. End of story.

KavexTrax

I'm sure Honda is shitting a brick, having a ball of a time reading how obstinate and bold we CL people are in craving for performance from a product destined to be scrapped

Anyhow, good job Steve

o snap its eric

with mods or just stock 3.5 liter? impressive.... add a sc wow your car is scary! but with a nice classy look hhaa

DISRUPTV

But are they still doing the GENII 335 hp? If so, whats involed in that (i.e. higher comp. pistons and cams?)

typeR

port and polish /heads/throttle body upper intake

Manus1980

TypeR,

Where can I purchase a set of heads for my 3.5L?

typeR

if you want type S heads right from acura

EricL

WRONG!

It's an MDX block with different "slugs" and various tasty touch-ups to make it all work well.


"$2500.00 buys you:

NEW race-prepped short block assembly displacing ~3.5L.
10.85:1 compression High Performance Pistons.
Weight matched rods with radiused crank journal oil ports.
Modified (volume enhanced) oil pump.
Full upper end gasket set (FR/RR heads and plenum)

Above listed components are completely assembled and packaged for drop shipment to you/installer for your -S heads to be bolted on, headers, and installation into your ride. The shipped product includes a 12 month unlimited mileage warranty and you keep your removed block if any issues (resale, vin#, lease rtn) arise.... there are no core charges as all parts are new. This warranty is a no questions asked (for the first one) NEW replacement assembly and does not include labor or additional damage.

With some quality head to intake port matching/cleaning and some minor exhaust port work, this package will produce upto the original 315HP of Doug's GEN I 3.5L cars. Doug is considering the release of the GEN II's exclusive cylinder heads on an exchange basis (cost control) for those of you seeking even more HP.

This offer is being made to dispel the myth's of price gouging for the original 3.5L variants and is a project for only quality technicians (not normally found in your buddies garage). Package includes ECU learn / break-in procedures.

Our current project car is a RES (mule) equipped 3.5L 6-speeder with MMII on board......and hopefully a jackshaft driven vortech supercharger to huff up the top end in the near future. Hell, I gotta have fun to ya know..."

CL SLeePeR

Who did you order this from? Is there a number I can call or a site that has an avaible information on the block and what it has done to it? Is it just and MDX Block with aftermarket goodies? I need some more info. Specs would be great. Thanks

TypeSKid

Totally different block>?


Acura makes only ONE 3.5L block.

TypeSKid

i just OWNED P5!!!!!!!!!!! :P

EricL

You could leave a PM for MDX-S, but I don't know how often he checks his messages.

And

You might want to ask Type-R, since he HAS the actual product in hand...

typeR

acura doesnt make any blocks honda does and about the only difference between our block and the MDX/pilot/odessy is the thickness of the sleeves...BTW my block is an '02 odessey



contact ACP for purchasing info

EricL

Acura 3.5L block in the RL is a 90-degree V6 and is not part of the Accord, Acura CL/TL/MDX family (those being 60-degree V-6 engines)

JRock

One's a 60degree V, one's a 90 degree V.

Also, the rick case acura guy told me they didnt use the MDX block because it has a more restrictive flow.

Point is, silly, they dont use an Acura block - they machine parts to turn OUR 3.2L BLOCK into a 3.5L block by stroking it.

edit - Beaten by EricL.

DISRUPTV

Ok hypothetical question I've always wanted 2 ask,


Say I get the engine enlarged to 3.5 Liters and I decide on putting an s/c on it...Now would I be able to use the 98-02 accord v6 pistons and cams since they have a 9.5-9.6:1 compression ratio instead of the 10.85:1 ratio that comes w/ the enlarged block? Would the accord piston and cams fit, b/c if they did wouldn't I be able to run considerable more boost then comptech's 4.5psi? (say I do all this to a 6speed CL) Thanks

JRock

Stroking to 3.5 should lower your compression anyway unless they do the cams so they lift enough to compress the same ratio.

cnatra

the Accord/TL/CL/Odyssey/Pilot/MDX all use the same
60 degree short block:
the difference is the crank & rods for more stroke
&/or the cylinder sleeves in the block for increase in bore diameter

Odyssey/MDX/Pilot
3.55bore x 3.66stroke = 3471cc

CL/TL
3.50bore x 3.39stroke = 3210cc

Accord
3.39bore x 3.39stroke =2997cc

I don't think there is a difference in deck height on the 3.5L to
accomadate the longer stroke.
(Ford had to do this when making the 5.4L from the 4.6L)

One thing that sets the MDX apart from the Odyssey/Pilot is it's slightyly higer peak torque at a much lower RPM becuase it utilizes a dual-stage intake manifold like the CL-S/TL-S

Anyone know if the '03 Accord has this ??

EricL

Actually, it’s the other way around (assuming that the pistons stay the same -- they don't). However, when you stroke the engine you increase the swept area. The area above the piston (at TDC) is called the combustion chamber volume; this area remains the same. So, if you increase the stroke of the piston, you are increasing ratio of "swept volume".

Terms:

SV = swept volume (just the volume "swept" by the moving piston that does NOT include the are above the piston at TDC).
CCV = combustion chamber volume (the area above the piston at TDC)


THE compression ratio, CR is:

CR = (SV + CCV)/CCV

If you increase SV (the swept volume), you are going to increase the compression ratio. I did some early calcs and if the pistons where not changed, the compression ratio would go from 10.5:1 to 11.26:1.

This assumes that the pistons are identical and the compression rings are in the same location, etc, etc...

So, the "stroked" 3.5L engine actually needs some "slugs" to drop the compression ratio down to 10.85:1 (close enough to 10.5:1) and worth a small gain in power.

AS for the cam issue -- that isn't going to impact the compression ratio. There might be some possibilities of using a different set of cams along with some porting and valve changes to accommodate the altered rod ratio and cylinder filling... It would depend on 5-speed auto vs. tighter ratio 6-speed and how "level" the torque would need to be relative to "peaky" gains...

EricL

I don't have the direct answer, but...

You might want to ask MDX-S if he could "punt" out a 3.5L with lower compression slugs. You could always ask. (I think you could probably get away with the small “bump” in compression from 10.5:1 to 10.85:1)

IMO, I would worry more about supplying the fuel with the current fuel pressure regulator and injectors with a S/C and 3.5L.

And, if you were in CA, you might run into problems with emissions depending on just how close the numbers are with the CLS S/C when they get it CARB'd. If you are out of CA -- you don't need to sweat this...

SFLA_Type-S

Any 6-Speeders out there thinking of doing the 3.5 conversion? I think that car would be an animal

DISRUPTV

Thanks EricL and everyone else for responding I see what everyone is saying and who knows maybe there will be someone who will get the 3.5 L conversion and add the s/c to it

p.s. The new accord 6speed utilizes (from the research I have done) the same clutch as the 6speed CL-S, thus in a few years, I'm pretty sure there will be upgraded aftermarket clutch for the v6accord. I'm thinking that Cl 6speed owners can utilize that aftermarket clutch and thus harness more power w/less worry

imagine an s/c w/that

Zapata

Kinda hard to control......... trq steer would be too much at that point. however, Scalbert is considering it or atleast a S/C.