We just finished up a beast of a car. Car made 360 RWHP and 372 RWTQ on a Dyanpack, that's 400 RWHP and 413 RWTQ using Dynojet numbers.

Mods are as follows:

• 178mm Pulley
• 69mm SC Pulley (machined from stock)
• Larger Injectors
• SL55 Pump
• SL55 Intake
• Magnecor wires/NGK plugs
• TVT HE
• Johnson Pump
• C3 spacers (needed for injectors)
• Dual Exhaust
• LET Tune

We are very pleased with these results, but the customer wants more.

Next up:

• Stage 2 Ported Heads
• Ported manifolds, intake runners, Y-pipe
• Seperated cooling system
• Headers
• SLK55 Brakes (no HP gain, but sick as hell)

Anyway, pics and vids to follow.

 

would that be a c3 pulley and a 178 crank pulley? great numbers!

 

What is the SL55 pump?

 

The SC pulley is ours and the 178 is a crank. We chose to keep the stock and modify it for reliability (not saying C3 is unrelieable).

 

what size injectors did you use?

SL55 pump would be the fuel pump?

how much are you going to port the manis and runners?

 

That's probably the fuel pump. Great numbers Anthony. Get some mdified manifolds on that thing.

 

so im trying to grasp the numbers. the c3 is 68 mm correct? and yours is 69mm. with the 178 are you equal to 185 crank , bigger or smaller?

 

sorry your conversion numbers are incorrect. Dynapack is power to the hubs. A dynojet is power to the wheels. Converted dynojet numbers would be lower then dynapack numbers because of the addition lost of power because of the wheels.

Dynapack

 

178mm+69mm is bigger than 185mm.

 

So can the owner drive the car? I'm saying at the track. Would love to see 60', ET, and MPH. These are great numbers, but so many dyno monsters have shown up on here lately. So far none have proven to be fast. Would love to see this setup run down the track, put up a sick 11 sec pass and datalogged on the run. I still believe the 178 is the top dog pulley out there hands down.

Congrats on getting creative with the parts. Another unique combo.

CQ

 

Cruzinquick,

I think I HAVE proven to be fast on the road with a "185mm like" Setup. Its all about Cooling. How about a little comparison to my times on my video?? Would be interesting what your car has in it when you are going faster than 115 MPH ???

YouTube - SLK32 AMG 100-270 KM/H

 

Was goign to try and get some 11 sec passes last tuesday but i got oil on my belt some how and it was slipping badly and now needs replaced once i get her cleaned i'll take her back out to the track and try again =)

 

Yes would be interesting indeed, unfortunately not going to happen here without getting arrested. I would assume it would be slower than yours unless your carrying more weight. Cooling would only be a factor if one plans on running at WOT for more than those 28 secs in the vid. For one full WOT run it wouldn't matter. Unfortunately your version of fast is not realistic here in the states. That's why we hit the 1/4 mile track. Now it would be interesting to see what your car would run in the 1/4 mile. ET's, MPH, and 60' would all tell where your car is making it's power. Now there are those here that do illegal drag racing from a roll, but I doubt any of them stay WOT for more than 15 seconds.

 

Good luck be safe and have fun.

 

Cooling is already a BIG Factor if you want to run a time like 23 Seconds from 100-270 KM/H, which I did in my video. Before my latest Cooling Mods this time would never have been possible. Unfortunately here in Germany there are not many places where you can run your car in the 1/4 mile with taking ET's, MPH, 60' and all that that times. We also run only on Street tires here. If I can get enough traction from the start I think a time a tad under 12sec. is also in my car. Would be interesting.

We here in Germany do Performance and Tuning Comparisons more from a rolling start and at higher speeds. At higher speeds traction, reaction time etc. are not so important. Only the Real Power of the Engine counts and there are no excuses. The engine has to work much harder at WOT in 4th or 5th gear. But I also like the Competition Spirit in the U.S. with Drag-Racing in the 1/4 mile very much.Thumbs up. Must be fun !!

By the way, I mailed with Brian Brave, who did the "Texas Mile" with 169 MPH = 270 KM/H in his SRT6. Next time he will take times for his Mile run. Than we can compare his and my times. This would be great!!!

 

That is my understanding as well - unless there was a correction factor in the results, running the car on a DJ would produce lower results than a DP dyno... not substantially higher.

TVT - assume the ECU is still stock, since it's not listed in the mods - is that accurate? Congrats, car sounds like a beast.

 

dynapack dynos also read notoriously high on torque.

 

We use both a Dynojet and Dynapack for our dyno testing. We have seen on average a 10-12% lower number on the Dynapack with the same car. My own crossfire dynoed 153 RWHP on the dynapack and 176 RWHP on the Dynojet, same day.

The owner is a very experienced drag racer with a previous car being a blown 9 sec Mustang.

As for the porting, the machine shop we use is going as large as possible that still maintains proper velocity. We have a bunch of spare SC and manifold housings to practice different sizes and runner shapes, so the effort will be worth it.

Unfortunately, we are reaching the very limits of this engine. After the breathing mods I only expect about 25-30 HP at most. THe graph (which I will get up soon) doesn't really signify that it is running out of air. If anything, at this point a real intercooler would make the most difference.

 

so how much would it cost someone to send their sc pulley to you and get it machined down to a c3 pulley? it is cheaper or are you not doing it for everyone

 

i bet that would be a big seller for you guys if you offered this service.

i wonder if you could take a few more mm off the c3 puley to get another .5psi without adding any belt slip?