BoostedV8

I started with a stock baseline of 417 rw hp. Added a pulley and belt upgrade and got 447 rw hp. Added Kleemann headers with deleted secondary cats and went up to 473 rw hp.

Thanks again to the guys at Hennessey Performance and Kleemann for some outstanding products, service and overall performance results. I could not be more pleased with these mods.

Still have not had a chance to get to the track. But if guys with 420 rw hp are running 116 mph then I think I will run over 120 mph with my additional 66 rw hp. Hoepfully we will see soon.

BoostedV8

Here is the stock vs modified before and after dyno sheet. Sorry I dont have the torque numbers yet. If other stock E55's are making over 470 rear wheel torque than I will guess that I am somewhere in the 540+ range.

medici78

Have you done any ECU tuning? Also, I'm surprised you didn't get torque numbers, as you NEED to know the torque in order to calculate horsepower.

BoostedV8

100% stock ECU. The Dynojet chassis dyno actually measures HP and takes the rpm info to give torque readings. Just the opposite of what most engine dyno's do.

housclass

great numbers! anytime you want to meet at the track, pm me!!

john

E55 RUSS

You definately need to get ECU to complement those mods...You car needs that, it will do even better with ECU...As I have told by Kleemanns before with Headers the pressure in the exhausts goes down and so the boost from 0.9 to 0.7, so you need Kleemann or others ECU to bring the boost back

Jakpro1

Man, you gotta at least get the speedtuningusa.com ecu mod.....for 350$, you'd be pushing near 500 rear wheel.

One thing that I am curious about.....guys at Kleemann told me it wasn't the best to be running boosted blower without ECU mod (increased fuel flow etc...)

Anyone ever hear that??

E55 RUSS

I've heard that...To get the optimal efficiency from any engine mod you need to adjust ECU if blowed than boost, engine and fuel mapping and something else i dont remember...

Get ECU!!!

E55_POWER

But their ECU runs way too rich. I got it done and within 3 days went to Kleemann ECU.

BoostedV8

Personally I dont think I would gain much more power with the ECU mod. I am happy with what I have and plan to leave it where it is. Thanks for the advice though as I am still a newbie here.

Jakpro1

All I ask is that you at least call Cory or Brandon at Kleemann USA. They are straight shooters and great guys. Tell them you have their products on and ask if it's okay to not run remapped ECU. 719.473.6441

Hate to have you toast a 30K motor my friend.

Just trying to help a brotha out.

All the best with the mods.

Rev It Up

You will absolutely get more hp. I have K2, ECU, Pully and headers from Kleemens and I am getting 501 hp at the wheels. The ECU will optimize your pulley and headres and it should be one of the first things you do with these mods, not the last. The E55 has a very advanced computer system, making thousands of engine calculations as you drive the car. You need to tell it what you changed to make it work its best. Also, I would be careful about spinning that turbo charger quicker without telling the ECU what is going on. I don't know of anyone doing the pulley without the ECU.

Also, curuios why you did not go with Kleemens for everything? Their kit is opitmized to all work together. Check if the pulley you ordered is the same diameter as the one from Kleemens. If it is, get your ECU mod from Kleemens for the K2 package. I am sure you will not be dissapointed. Corey at Kleemens should be able to help you out.

R. Range

I'm not saying a pulley change w/o an ECU mod is or isn't a good thing, but this doesn't cause me to believe it's necessary. A couple of the things the ECU is undoubtedly monitoring are manifold air pressure and intake air temps (both of which will rise with more boost), and if it has the ability to make adjustments for changes in those variables, changing the ECU may not be necessary. And even if the ECU can't change the fuel or timing in response to those inputs, if it is tuned far enough on the rich side to provide a significant safety cushion it may still be fine with another 2-3 psi. BTW, I'm assuming you misspoke about the turbo.

Rev It Up

What do you think the pulley spins? It is your call and either way I wish you the best of luck with your mods. However, I would get the ECU done before you damage your engine.

medici78

Well, if you read the other thread, Jakpro already mentioned this upgrade to Kleemann, who in turn said it would not damage the engine, in fact it would work fine, just not make as much power as it would if the ECU was upgraded. In theory, it might prove benefecial to do without the ECU upgrade, as the car still runs safely rich and not as hot as the ECU mod advances timing, thereby increasing cylinder temps.