MrHeeltoe

iTrader: (1)

Hey folks, I uploaded some new pics yesterday, thought I would share:

Link to item on Heeltoe

swoosh

iTrader: (5)

free bump for Marcus !!!

TinyRK

I have no clue, so that's why I ask:
what else does this do than lowering the weight by 4.5lbs and looking shiny?

If the diameter is different it might change something, but if not what am I missing here?

I mean I loose 4.5lbs after taking a dump... might be cheaper

EDIT:
FInally found a good explanation for another Pully for a different car, so sorry for the cross reference!

MrHeeltoe

iTrader: (1)

"This reduction in weight from the crank shaft is equal to removing more than 100 lbs of vehicle weight!"

I'm trying to make sense of this...seems like a stretch. What they mean is it frees up power, but I am unsure that it is enough to equate to 100 lbs savings. 100lbs effects acceleration, braking, handling... the pulley only frees up power to the wheels.

"Throttle response, horsepower and torque are all increased with this easy to install part."

This is true though. Yes a smaller diameter helps as well, but the weight is the big bonus.

swoosh

iTrader: (5)

^^^ glad you found that link....

its rotational mass and because its so close to the engine it frees up a lot of weight....

in the 3G the pulley weight difference (static) is 7.5 lbs and dynamically is 105 some lbs....

stealthall

This may be a rookie question but...

My car is a CPO, does this mod void that? Or is it a dealership by dealership decision?

While we are at it...is there any other mods to keep away from that could void CPO/factory warranty?

Thaaaaaaanks.

suros10

I might make another trip to your garage again, Marcus. I want to get this pulley and the P2R throttle body spacer.

swoosh

iTrader: (5)

^^^it is a dealership - dealership decision....

I am using the UR crank pulley (same thing) since 60K miles without a problem.....i did my timing belt job at 133K and the dealer didnt say anything about it....so i guess it depends on dealer to dealer....

finally there was some debate where people mentioned about a harmonic balancer, but the 3G/4G (atleast the 3G as far as i know) is internally balanced and doesnt need a harmonic balancer.....

Steven Bell

iTrader: (2)

I'm still considering this for my Type S. These are awesome mods.

MrHeeltoe

iTrader: (1)

It's a great, worry-free mod!

3rdGenHybrid

I'd like to see some review from 4th gen owners, this and te p2r throttle body spacer would be nice to hear more about

TinyRK

Can someone post an installation-manual, if available?
Seems like an affordable mod (looks more promising than a SRI or CAI).

swoosh

iTrader: (5)

^^^ its def very promising....and very simple....here is the link from the 3G section and the installation is exactly the same....

https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/ur-crank-pulley-info-3g-garage-098-a-612971/
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/04-08-tl-07-08-tl-s-crank-pulley-install-diy-lots-pics-098-a-836369/

Pseudomaniac

iTrader: (1)

I did the P2R spacer, gaskets, and intake runners all at the same time. At the time only had the SRI and it felt like it quicked things a bit - but not overwhelming in the least.

potmilkz

man i would jump on this but would like to see someone have it first.. ive heard many horror stories from the TSX side about this messing up the motor..

i remember there is this one thread where this tsx member's car wouldn't start because of this crank pulley but didnt bother to show proof..

anyone have it yet?

justnspace

iTrader: (1)

NOT this pulley.
the TSXers underdrove and added a 2nd pulley.
thats what messed things up.


with this pulley you'll be safe.
its the same as the third gen.
because it remains factory diameter.

DO NOT UNDERDRIVE.

swoosh

iTrader: (5)

^^^ that was for the under-drive !!!

this is the stock sized....

the under-drive is smaller in diameter and hence "under driving" your components....i would highly recommend to stay away from that....it will gain you 1-2 ponies more but does risk damaging your engine in the longer run....

justnspace

iTrader: (1)

beat you swoosh!

Also, Meh on the TB spacer.

swoosh

iTrader: (5)

^^^ mine has more info

Pseudomaniac

iTrader: (1)

DO NOT UNDERDRIVE. I've used the UO light pulleys in the past without issue.

3rdGenHybrid

Maybe I'll do the pulley and p2r spacer after I dyno and see of it gained any hp, my appointments Saturday so hopefully by next month I'll have the pulley installed

justnspace

iTrader: (1)

^you wont see any gains on the dyno.

HeartTLs

iTrader: (5)

You recommend the pulley, but say it provides no gains?

swoosh

iTrader: (5)

^^^

Justn, you will see gains on the dyno....the throttle response will improve and it will free up some of the lost power....the real gains will be felt during driving but dyno will show some improvements....

justnspace

iTrader: (1)

I didnt say that.
YOu wont see gains on the dyno.

I thought it was like losing weight....is it not?
105 dynamic loss.
when you drop pounds you dont see this on the dyno.....no?

swoosh

iTrader: (5)

^^^ yes weight loss makes you quicker but doesnt show up on the dyno other than the pulley....as pulley comes under the drivetrain loss...say you make 260 at the crank but only 230 at the wheels....so when you install the pulley, you still make only 260 at the crank but prolly 235 at the wheels....

am i making sense here....

PS: those were just random numbers i picked....

justnspace

iTrader: (1)

oh, i thought it had the same effect as weight loss. being, you wont be able to see gains on the dyno.

I understand!
did you get my text?

Pseudomaniac

iTrader: (1)

You will see marignal gains on the dyno if it's being consistent / sensitive enough.

HP = (Torque x RPM) / 5252

This is the formula all dynos and manufacturers use.

Torque is the measure of the rotational power of the engine. By taking 4 pounds off the rotational mass, you're reducing the effort needed to turn the same assembly meaning that power is no longer being parasitically consumed, but instead, to do work.

You gain a pound foot of torque - you gain HP.

swoosh

iTrader: (5)

get on gtalk....my cellphone coverage at my new job SUCKS !!!

MrHeeltoe

iTrader: (1)

Countless people with 3G TLs have and love this pulley. Just because your car is one year newer means very little. The engine in these cars is the same. Your results will be as well. Less power lost to parasitic drag.

I have had a 3 piece underdrive crank/alternator/ps pulley kit on my 1G TSX for more than a year and a half and 30K miles, including one track day and 3 1000+ mile road tips. I have NEVER had an issue.

I explored the issue with the 2G TSXs a bit and could not come up with a substantive reason for their issues. I cannot corroborate it at all.

NOBODY will have an issue with this part on this car, guaranteed. Unless you install it wrong.

There is no real good reason not to underdrive.

This is probably not true. While you won't see 10 hp gains you should see at least 2-3 across the entire rev range.

Pseudomaniac

iTrader: (1)

Electric power steering. Don't underdrive.

MrHeeltoe

iTrader: (1)

Are we sure there is an issue here? The fact that the PS is electric really should not make a huge difference in my mind unless there is a technical reason not to.

HeartTLs

iTrader: (5)

Just ordered mine, I'll have it in my the end of next week. I'll let you guys know my impression(s) by then.

eazy

iTrader: (8)

Would a GB be possible? Maybe knock a couple off and free shipping?

eazy

iTrader: (8)

^ Lol even better. Definitely let me know!

3rdGenHybrid

Actually the difference from a 2005 and 2007 TL-S is a lot. I used the under drive on my 2005 and it made a big difference, on my tl-s .... Nothing... Not even a little. So that's why I'm debating on the 2010. Ill buy it just to see, I was already going to go down that road...

MrHeeltoe

iTrader: (1)

It is a mechanical component. There is no reason why it would make a difference on one car and not the next, even if it is a Type-S. More likely you felt less of a difference because the Type-S engine makes more power. 5 hp on a 200 hp engine is a bigger gain than 5 hp on a 260 hp engine (I know these aren't the right numbers but you get my drift).

3rdGenHybrid

I was thinking more so along the lines that the gains were more on the 05 than the 07, due to the stroke and the fact that the 07 was more of a balanced engine vs the 3.2

MrHeeltoe

iTrader: (1)

Engine balance has nothing to do with the power gains I would not think. I honestly would believe the gains would be the same on both engines.

Pseudomaniac

iTrader: (1)

Factory pulley weights have consistently gone down from J32 to J35 to J37 by a pound or so each generation (if I recall properly) - while the gain is there - the amount of the gain per generation is potentially less percentage.