acura4eva

Im thinking about changing mine but is it worth the money, and ive heard that it would give you about 10 more horsepower......true????

phee

iTrader: (5)

who makes an aftermarket crank?

i would just get the stock one knife edged and balanced.

TheChamp531

iTrader: (3)

I forgot about what company, but I heard from my friend that there is a company that makes Japanese's car crankshaft and easily make at least 15WHP?

acura4eva

Unorthodox Racing Pulleys with that you can use the standard belt layout with out underdriving your accessories..... altornator, ect......

I hate cars

Swapping the crank? That's nuts. You get nothing from swapping a crank. You can run a stroker that will increase displacement but that requires different pistons and usually rods. You can run a stronger forged crank that will hold up to more hp but I believe the TL comes with a forged crank. You realize the engine has to be completely disassembled out of the car, right?

Did you mean cam?

ifirahse

iTrader: (6)

I think he just forgot to add "pulley" after crankshaft.

phee

iTrader: (5)

maybe. but a lighter CS will yield less parasitic loss. here i was getting excited abotu more engine mods

I hate cars

Knife edging and that sort of thing are things you do when building an engine where it's apart already. I don't think anyone in the history of the world has ever pulled an engine apart just to knife edge the crank and then put it back together.

Keep in mind most aftermarket cranks are quite a bit heavier than stock units. A lighter flywheel for a manual or smaller torque convertor for an auto would yield much better results. My GN after going from a stock 12" convertor to a 10" non-lockup convertor revs like an Indy car in comparison to stock. It was something like a 20lb reduction in rotating mass. People look at it funny because it revs so fast. I would assume the TL would show similar results and it would really help the auto version get off the line quicker.

MobTownTL

iTrader: (1)

^^^ oh shit huh xP that sounds sexy. but is it as simple as changing a few parts?

Rick_TL-S

Seems to me aftermarket cams for the TL are like headers. Nonexistent.

I hate cars

You have to remove the trans but it is as easy as bolting in the new flywheel or torque convertor.

It will take more skill to drive the manual as it will be easier to stall when taking off but after a day or two it becomes second nature. It's always funny to watch a technician drive off on a car with a light flywheel and 3 puck clutch (my old 944 turbo). They would kill it multiple times trying to go 50 feet lol.

Maddizm

iTrader: (5)

Well I guess us 'base' guys can still get your (Type-S) cams though can't we ? BTW I know they are lighter but they also shift the power band range? I'm not understanding this cam swap all the way. Does it shift redline to a higher RPM? Isn't there some kinda limiter involved?

Edit : Rereading the title, I failed to see the OP put 'crankshaft' ... woops off topic... but if someone could still answer, I really wanna know, b/c I might do this if the benefit is there.

I hate cars

The cam swap will give you a little more power up top, maybe in the mid range too. It's hard to say on a vtec engine if you would lose low end without seeing cam specs.

On Domestics cam swaps are very popular, on the LSx series engines (Vettes, trucks, Camaros, etc) a cam swap can show over 60hp at the wheels without moving the power too high. On a TL, it hasn't been done enough to know if it's worth the swap.

These things come with a fair amount of cam already so my guess is it's not worth it. But that's only a guess.

Oh, and don't worry about the weight, you won't ever feel the .000001hp the lighter cams give you lol.

Maddizm

iTrader: (5)

^ cool thanks!

csmeance

well with a stronger crank, won't it be possible to rev higher to say 7500 RPM, and the higher a car revs, the more power it produces.

I hate cars

The rods are usually the limiting factor for revs. Crank usually breaks from too much power/detonaton.

The stock crank looks pretty beefy and I read somewhere that it's forged. If so, it's probably good for well past 500hp and as many rpms as the upper end can take.

NBPacuraTL

iTrader: (1)

More RPM's means you'll probably have to upgrade the valvetrain also. Stiffer springs to prevent valve float and etc.

Bearcat94

You are correct - crankshaft in the TL/TL-S is forged; so are the rods:

http://www.hondanews.com/categories/735/releases/3747

JS08TLS

Crank isn't the problem. The rods would be. I think it would turn a couple hundred more than stock and be ok.
Thats not exactly true. Just because a car can rev to say 9,500rpm doesnt mean it will make power up there. It could peak out at 8,500 rpm and drop from there. It depends on head, IM, cams, etc.

Rick_TL-S

IS there anything in this car that isn't forged?

csmeance

the rims...

I hate cars

Heck, if the TL-S has a forged bottom end, why not go the headgasket route to lower the compression for 1/5 the price of pistons/rods, and put some boost to it. This may belong in the other thread but it seems like this thing should be relatively cheap to run some decent boost on.