[lov2xlr8]

I am not the type of guy to mess around with settings so I am looking for a plug-and-play package that includes a supercharger pulley, belt and tune that I can install myself.

Does such a package currently exist?

Thanks!

[Damo]

11.5%, 15%, 16% and 17% Reduction Supercharger Pulleys should all go on with a shortened belt without the real need to do anything else (except maybe change the plugs for safety).

As for which is the best, personally would go for them in the following order:

1) 15% or 17% Alta V2
2) 16% M7 (has all the advantages of the above except for the manner in which it attachs).
3) Wouldn't really consider any other as not aware of any other that have the features of the above 2.

Hardest part of the pulley upgrade is getting to and removing the original pulley in the first place safely. You need to ensure you have the right tools so you do it right first time.

[lov2xlr8]

Interesting. So a 17% pully does not require more fuel?

Do these cars run rich?

How much HP can I expect from a 17% pulley?

[Damo]

Quote: Originally Posted by lov2xlr8 (original)

Interesting. So a 17% pully does not require more fuel?

Do these cars run rich?

How much HP can I expect from a 17% pulley?

Some cars may need a remap, but very few do for a pulley upgrade of 17% or less.

Do a search for roland2003 's post about remaps. He only does a remap on cars that need it as part of his conversions and his pulleys are 17%. Also worth searching for his comments on Wide open throttle (WOT) on 5th and 6th gear with a tuned car if you don't want to blow it up.

Guy knows his stuff

I'm going for 17% pulley with uprated plugs, but getting larger injectors to be on the safe side to.

[Damo]

Just give this thread a day or so for people to see it and make comments, lots of people on here who know more than I about this subject Just reiterating their stuff

[1320autos]

We always try and steer customers towards a 15% due to it being just on the edge of the efficency map of the M45 and creates less heat than the others and thus lower IAT above certain rpms.

I admit that I haven't run back to back tests, but intend to as soon as we get a quiet moment. We now have a 15 17 and 19 % pulley to try back to back on the same very very long day.

loads of people run 17% and 19% here and on NAM without any issues

[Damo]

What do you mean by the "efficiency map"?

[1320autos]

M45 - Eaton.com

Enjoy

[Cooooooperslad]

I'm changing from a 17% to a 15% after seeing my IAT

[DaFlake]

There have been a few vendors that have advised that the 15% is the way to go for a well balanced engine. As for the tune part of it, I will always recommend that it be done as it will optimize performance. If you can't get to an actual tuner, you might look at products like MTH.

[Fisher]

All are good.

You just take a look to price/perfomance and buy the advantageous one.

[Cooooooperslad]

I think the 17% is good if you never take the car over 5k, but over then the air intake temperatures get so high the heat causes and adverse affect and you lose power compared to the 15%.

Oh and not only are you losing power you are risking damaging your engine

[Fisher]

I have 19% and car works great. Of course with an water to air intercooler.

Even at 35°C car pull strong. Good combination!

[Cooooooperslad]

If you can get the cooling ye fine but the 17 and 19% are still out of the Chargers recommend rpm anyway

[Fisher]

Didn't find any problems with 19% anywhere.

About problems talking just people who haven't got it.

We all with it are satisfied.

[MINIMANIAUK]

To about 13-14 psi The Eaton works great ,above this pressure the manifold pressure gets to a point it starts to backflow into the charger as the charger housing pressure is exceeded,this creates heat as the charger works harder,and harder with increasing boost pressure , at the higher rpms the heat rises dramatically ,and exponentially ,losses soar,
there is no cooler made that can overcome the rapid heat gains at the very high boost /rpms
The charger performance also alters due expansion with heat of the charger and rotor,the clearances alter ,prolonged high rpm creates internal charger heat
The efficiency map kindly provided by Paul is not fixed ,as it is not heat adjusted ,
19% is way off the map at the high rpms,
Coooooperslad has it well summarised

[3rdpillar]

watching this thread with interest..

[Suj999]

Looks very interesting..

how about the 11.5%? is this the saffer bet?

How much money are we looking at when talking about getting the pully and having it fixed. Is it important to have the ECU remapped? Any other items that would need tuning?

Also, dows the lowdown (RPM) torque reduces? As there is more drag on the engine as the super charger gets working?

[roland2003]

Hi,Many people use 19%, many use 15%. We have found that as part of our GTT conversions 17% is the best balance. If we put you in 2 identical cars one with 15% and one with 17% everyone would pick the 17%...put simply it pulls harder at low and mid rpm..
As an experiment I ran a 17% and +3% GTT crank pulley (=20% !!!) for a while yes the SC efficiency drops away but mechanically the SC held up fine (with a 7200 rev limit)...No we wont sell that setup
Best Regards Roland GTT
We can fit 15% SC pulleys as part of our conversions if required, it just wont be quite as punchy.
..

[Bhozar]

Quote: Originally Posted by Cooooooperslad (original)

I'm changing from a 17% to a 15% after seeing my IAT

Do you intend to rolling road the two pullies back to back to see what difference it makes to IAT/BHP/Torque on your car?