My crankshaft pulley is in need of replacing, I have been thinking about replacing it with a lightweight one from the likes of Fensport for example. I have however noticed they do not seem to have the rubber vibration damper insert fitted.

Can anyone tell me what the affects of this might be for a road car??

as im looking to buy this or another example today really!!

i have spoken with fensport who say they would not sell a product that would not be beneficial to our cars!!

Thoughts please??

well they still sold HKS fuel cut defencers for many years knowing the effects these had on st205's so they told a slight fib!

but yeah with regards to this product it is a one where it divides the people.

i personally think it is a bad thing to run one on a road car and so do quite a few others and i have seen an mr2 snap the crank before and claimed that this could be due to using a lightweight pulley.

i see no advantage at all of using one, my opinion, stick to toyota, if they didnt intend the dampener to not be there, it wouldnt in the first place and i think they know a little more about their own engine than we do.

just my 2p though

so in short, yes Fensport do sell some good products but in my opinion i dont think i would be willing to take the risk for such little gain.

agree with dale.

To be fair on the HKS FCD - if it is set up properly on the rollers and AFR measured then you can actually dial out a little of the excess fuel. No mention was howeber made on how it effects the fuelling or timing as sold.

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

Thank you Dale. From what i understand of this those were pretty much my thoughts.

Vibration damper was puth there for a reason!

So in that case, does anyone know of another lightweight pulley that i can get? One that comes with the rubber vibration damper insert?? Or should i just stick with the original toyota item!

Thanks agin!

ah i see JP, never thought about that! would it be of any benificial gain or just as well off to go for a standalone as i havent really ever looked at them after seing all the bad effects they caused you see. :S

mike, i would just go for the standard Toyota item to be fair mate, we did and i think 90% of people do on their engines and as you agree, Toyota put it on there so i would just stick with it.

Agree with Dale

Stick to the stock Toyota item. The dampening properties of the stock pulley are there for a reason...

_________________
Kris
95 ST205 - slept for 10 years, now waking up...
Avensis
http://www.gtfours.co.uk
_______________________________________
Turbocharging - the replacement for displacement

well Im sold

Thanks guys!

whilst were on the subject of pulleys, the also offer lighter, PAS an alternator pulleys!!

a load of rubbish?

thanks agian

Fitting a lighter alternator or PAS pulley is a lot safer than the crank pulley.

Whilst the gains won't be noticeable, if you have money to spare and want shiny parts then go for it...

_________________
Kris
95 ST205 - slept for 10 years, now waking up...
Avensis
http://www.gtfours.co.uk
_______________________________________
Turbocharging - the replacement for displacement

An FCD will move the point in the look up table the std ECU refers to so likely to reduce fuelling and increase timing (as ECU will pull a figure for a lower boost point).

carefully done it would be beneficial especially on a UK car running super unleaded fuel.

An aftermarket ECU with a decent map will always be better.

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

Can't speak for HKS, but the simple FCD's I've come across LIMIT the map sensor signal just below fuel cut level (say 1.1BAR on 205) usually adjustable by user. Below that level, the mapping remains as standard, above that level timing and fueling will remain i.e. will become too weak/too advanced for the higher boost.
With the safety margins built into the standard ECU this isn't a problem for slight overboost, but it does mean the safety has been bypassed in the event of a large accidental overboost.

_________________
If at first you don't suck seed, try drier grain.

CDB - There are indeed 2 types of FCD.
Type 1 = voltage clamp circuit - normally at 4.3V IIRC and removes entirely the fuel cut.
Type 2 = shifts the entire range of MAP sensor Vout - fuel cut point can be moved but changes fuelling/timing throughout the map.

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R