rflow306

Has anyone tried the asp or Hennessy Pulley on a cls55 ?. I know this is the wrong forum but it's the busiest.

Fikse

Ever read the stories about Hennessy ripping their customers off for thousands of dollars.... even the major magazines reported about it....

dragonAMG

With all the positive Kleemann and Renntech reviews, why would anyone that frequents this board go with anyone else?

Ted Baldwin

.............I have the Henessey pulley in my G55 K4. latest dyno is 506HP and 531lbft of torque to the wheels. That adds up t 670HP and 706lbft of torque to the crank using a 25% drive train loss for big 4x4. The advantage of the Henessey pulley is that it is a larger pulley and generates higher boost. The pulley upgrade is not complicated and in my humble opinion no one company has a secret sauce. what is important is that you need a fulley dampened pulley so that your set up remains harmonically balanced.

Ted

E55 RUSS

I thought you have ASp pullies yourself...It works good ???

Are ASP pullies harmonically balanced ??? Thinking of getting them...

ima55r2

The ASP pulley is a modified MB pulley and therefore has the damper. I read that that you used to be able to send your original pulley for a core credit but I don't know if they still do it.

BlownV8

Are you sure about that? ASP machines custom pullies and will do any size you want.

rflow306

Yes I do, very happy with it. The pulley is a modified stock pulley so it is harmonically balanced.

Just wanted to see if anyone has tried it on a cls 55.

BlownV8

Are you sure it's a modified pulley or is it a custom pulley that mounts to the existing harmonic balancer?

rflow306

They definitely modify the stock one. The factory balancer and pulley is a one piece design. They machine or cut out the supercharger section of the pulley and then re-install a larger section. It looks to be a press fit which is then tack welded for extra security. Then it looks like they re-balance the entire assembly.

It doesn't look as nice as the klee or renntech but it works great.

BlownV8

Ok, yeah that's what I thought. They machine another pulley and attach it to the stock harmonic balancer.

ima55r2

This is what you get for the ASP kit and the link is for the dyno.

https://mbworld.org/forums/showpost....4&postcount=20

Ted Baldwin

...........For the AMG V8K engines ASP, Kleemann, Brabus, Hennessey, Carlson, MKB etc all modify the crankshaft pulley by adding an outer ring to it. The diameter of the outer ring determines the degree of boost and is largely responsible for any significant differences in HP gained between the different companies. ECU tunning then modifies this from a safety standpoint by making sure A/F ratios are proper and your engine is not running too lean. This is all. The appearance of the ASP pulley above is exactly the same as appearance of the Kleemann pulley and those of other tuners.

.............The smaller pulley pictured above is a smaller waterpump pulley that is neccessary with the Hennessey and ASP pulleys because the larger diameter of those modified Crank shaft pullies cause them to rub against the stock water pump pulley when installed. It is not usually needed with the Kleemann and Renntech set up.

Ted

E55 RUSS

456 HP at the wheel sound good with just a pullies...

Ted...

Do you think its SAFE to run 55 with Headers and Pullies and stock ECU ???

theboogers

what belt size change do you need with the asp pulley? thanks

Ted Baldwin

.............my opinion is that you should not do any engine modifications without doing before and after dynos with A/F ratios. This is the major point. Your dyno with A/F ratios will tell you if you need ECU changes. My opinion is that when done this way, many will discover that the ECU changes were not neccassary with the pulley upgrade alone. As you modify your car further with headers etc, your engine tends to lean out even more making it unsafe without ECU modifications for more fuel. Again, Dynos, dynos, dynos!!!!!!!! You simply MUST dyno your car with A/F ratios.


Ted

ima55r2

The asp pulleys use the existing belt. The smaller water pump pulley offsets the larger crank pulley.

I was going to do the before and after dyno on the same day. Would it be better to wait some after the install to let the car do its adjusting and if so, how long?

rflow306

It uses the stock accessory belt but a larger supercharger belt. The perfect belt for the supercharger is a Dayco gold label belt #5080515.

E55 RUSS

Hmm...so I need to get some other belt with ASP pullies or they come with diff S/C belt already

rflow306

It does not come with a belt at least not when i purchased it. When I first purchased it Asp told me that the factory belt would work, yeah right. Called them back and they gave me a part number for a belt that was to long. So we found the correct size and called to inform them. Hopefully they are now giving customers the right belt size for our application.

E55 RUSS

So I would definately need this Dayco belt you recccomended....Is it expensive ??? Can I get it form them as well ???

Ted Baldwin

.............nothing special about the belts. At the time of install, you look to see if you need a slightly larger or smaller belt and you purchase that from your local auto parts store. Mine came from Discount auto parts. The pulley upgrade is a really a very simple mod. Not sure why it is shrouded in mystery and wonder.

Ted

rflow306

Ted I don't know about the Hennessey pulley but the ASP pulley required a slightly larger belt than a 510 but smaller than 525. I searched all over and found only one manufacturer that made a 515 belt which was dayco. I then found a local auto part that had it in stock.

I would be curious to know what belt size you have on the g wagon?.

E55 RUSS

OK 515, 525 what measures are those...not sure if our local supplier would have such belt on stock...thats is why I want to prepare....

So I need size 515 ???

rflow306

Those numbers stand for the aproximate size in inches 515=51.5 inches, 525=52.5 inches. The metric part number is 8kp1310 which should be available there. Look for an 8 grove belt 1310 mm long.