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Supersprint Headers/cats, Evosport 3.45 diff. & RMS shifter installed!

4K views 31 replies 14 participants last post by  BeastPower 
#1 · (Edited)
Just got back from Columbus, OH. after the install of the SS headers & cats, the Evosport custom 3.45 diff. and the RMS short shifter. The diff. was put in first by my dealer and a race shop put in the headers, etc. because I wanted to use their in-house dyno for pre & post dyno.

The diff. feels great, like I always thought the M5 should feel. Great bang for the buck. I have a 30% fixed lockup and a 2X dynamic lockup. To answer some questions I've been asked about the diff. and increased lockup: first, tire wear (inside wheel drag):

"You will have more tire wear on cornering--MORE EVEN tire wear. With
the current lockup ratio, you have less tire wear on 1 tire only, as 1 is
doing more work than the other. The more even the lockup, the more even
your tire wear will be."

Second, understeer/oversteer:
Oversteer/Understeer:

"With more lockup you will have may have more understeer leading into a
turn. However, this is only if you are flooring it going into the turn. As you
stated on the phone, you wait to accelerate hard until the apex of the turn,
and thus would notice minimal, if any at all, increase in understeer. Even
if you do throttle-hard into the turn, with a 40% lockup there would only be
a minimal increase in understeer. A 75% lockup would be another story...

Oversteer, which again would only be if you accelerate hard into a turn in
wet conditions (which obviously is not recommended) would only be a minimal
change with the 30-40% lockup. However, the way we determined to build your differential, with a 2x dynamic lockup, you would have the power much
faster, and thus could find yourself in a dangerous position--again, only if
you throttle hard into the turn." (Thanks Ben at Evosport for the quoted answers!) Bottom line, for me at least, the diff. is great. The engine is revving a bit higher, but for my beast it corrected some inherent inadequacies.

Next, SS header and cats: All I can say is wow! Expensive, but worth every penny. Top notch ceramic coating, fabulous sound and power galore! I'm still smiling. Tony & I switch cars for a bit on the way home. Tony's engine has always felt stronger than mine, but he feels that 6th gear in mine now feels like 4th gear in his! The sound is gorgeous! The back burble I used to get from the SS x-pipe now is simply succulent! The difference in acceleration is incredible. I did not do a post dyno YET, because I wanted to dyno it after the Powerchip software created for Evosport to account for the headers is installed. I was somewhat disappointed by my pre-install dyno of 338.91HP and 317.53 for torque. I expect about a 30HP increase with the headers and software, but we'll see.

Finally, the RMS short shifter: This replaced my Rogue Octane shifter with WSR. I liked the Rogue a lot, but I still felt the throws were longer than I wanted. Effort was great and shifting was always precise, with no vibration. The RMS shifter is adjustable. I had it installed with the setting as it arrived to me. The throw fells significantly shorter than the Rogue and there is NO increased effort at all... why I'm not sure. The shifting is precise with a nice, prounounced "snick...snick". I am going to leave the setting where it is for now, but at sometime, I may try one setting shorter and see how that feels.

Anyway, I dropped a lot of dough into these mods., but I am very happy with the results.
:cheers:
 
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#2 ·
Back 'er down in Washington County!

I hope you two throttled back for those last 20 miles of I-77! I still have nightmares about the enforcement on that stretch, and it's been twenty years! I can only imagine the salivation that's triggered in a Trooper by a pair of Beasts in flight!!

XrayMD said:
I was somewhat dissapointed by my pre-install dyno of 338.91HP and 317.53 for torque. I expect about a 30HP increase with the headers and software, but we'll see.
Why the disappointment with your baseline pulls? 339 is better than most I've seen, although the TQ might be a tad low. My last was 341 BHP /326 TQ (SS cat-back being only powertrain mod).

I'm eager to see your post-install pulls.

Glad you're enjoying the mods!

-Dave
 
#3 ·
Dave, I was a bit dissapointed because I felt that that HP figure was OK for bone stock. I thought it should be a bit higher because of my SS exhaust and x-pipe and cold air intake. I remember pre and post dyno of the beast at the time of exhaust install and seems to me I did get 8 HP increase...I'll have to look for that chart.
:cheers:
 
#4 · (Edited)
Dave, just found my old dyno figures:

Pre-SS exhaust & x-pipe: 335.3HP 324.8TQ

Post exhaust & x-pipe: 340.1HP 328.0TQ

So, by those figures, my PRE headers dyno was a bit down in both HP & TQ. However, I suspect there may be some variability in dynos, even the same make and model at different locations, and of course, ambient temp. and humidity were probably different. To be honest, I'm not sure what it all means! Let's see what happens after the Powerchip software is in. ALso, forgot to mention and not sure if this would have any bearing on dyno, but I had on 17" snow tires at the time of the PRE headers dyno.
:cheers:
 
#5 · (Edited)
Steve, Congrats! Quick question for you...........

Okay, so you still have & kept the SS X-Pipe, right?
So, the headers along with the X-Pipe isn't out of control loud ????
Meaning your neighbors give you the evil eye stare down. You know what I mean.
Please let us know, okay.
Robert :viking:
 
#6 ·
I don't think it's exceptionally louder. Definitely a bit throatier & with a bit more back burble. I'll let you know if my neighbors ask me to leave the neighborhood! No one came running out of their house tonight when I drove home up my street. :hihi:
:cheers:
 
#7 ·
FAST 5,

I've got the SS x pipe and exhuast and it was ok till i added the supercharger which must have made it 30% louder..... I wonder how its going to sound after installing headers, down pipe + racing cats :eek:

I will let you know if my neighbors kick me out !!! :crying:

P.S. its going to be pumping more power now with the extra parts that will be going in. More power = louder = higher chance of getting kicked out :crying: :crying: :crying:
 
#8 ·
Robert, if I can figure out how to use the video option on my camera I'll post to show how loud headers with B&B is. Angry neighbor loud, I believe it's all from the muffs. though.
Black M5 , I noticed a louder m3 when I s/c'ed it, then when I went turbo I thought it would get quieter, but the 3" exhaust made it deeper than the twin 2.5" at idle....
 
#9 ·
Hey Steve,

Congrats Man on the Great mods. :thumbsup:

Keep posting buddy, I want to know ALL.

How is it on start up and shut down? (No differnce hopefully)

Still fires up instantly and shuts off straight away?

Do you leave Tony behind in a drag race?

How many car lengths are you pulling?

Come on man, I want details. hiha Good Job buddy. :cheers:
 
#10 ·
Congrats on your new mods and thanks for the feed back. Did you drive your car after the diff install prior to the header/cat to compare the torque increase on your diff prior to the hp gains of the headers?

I'll be calling evo sports today...I'm planning on the diff and the headers, but don't think I'll be putting on the cats.

Again thanks. :thumbsup:
 
#11 ·
Gaspasser, I did drive the beast with JUST the new diff. for about 10 miles before taking it to the race shop for the additional installs. The diff. felt great by itself. It fixed a problem that was inherent in my beast and made driving much more enjoyable. I always felt torque was down in the lower gears. Third gear was always my favorite but it is now awesome. Passing in sixth gear is also greatly improved. Of course, the addition of the headers and cats. amplified everything to a great degree. I am VERY happy with the way it all turned out. I can't wait to get the Powerchip installed for headers! :cheers:
 
#13 ·
Great news Gas! You WILL NOT be disappointed. Talk to Tom and/or Ben and find out what you'll miss by not having the cats. Looking forward to your impressions. By the way, so far, no SES light. I hope to get the Powerchip software developed for Evosport tonight and get it installed.
:cheers:
 
#15 ·
I hate to admit it, but X-Ray pulled 10 car lengths on me from 80 to around 120. The sound was just simply amazing. Driving the car, it seemed only a little bit louder, but when it passed in anger, it sounded like an F-16 fly-by.
This is WITHOUT the Powerchip software.
And my Beast was always stronger.
Just amazing.
And depressing. :grrrrr:


Have I mentioned the sound? ****!
 
#16 ·
Oh jeez Tony...Was I supposed to floor it when we did that? hiha
:cheers:
 
#18 ·
As far as the shifter goes, it makes more of a "snick" sound when shifting than stock, but I like this. I find it smoother than stock and I don't notice any significant increase in effort. Also, shifting greatly improved when I put the Rogue Engineering performance transmission mounts and Royal Purple tranny fluid in.
:cheers:
 
#19 ·
Steve,
Congrats....as I always said, the headers and cats are the best bang for your money...and the sound, don't you love it?????!!!!!! Don't bother with the intake side, tried it and it isn't worth a dime.

Enjoy

Claus
 
#20 ·
Hey Claus..............

I took notice of your mod list for your Z8 car. You have the Schrick Cams. Nice! What do you think they are good for, how much HP are they worth????
If you did this, why doesn't others do what you did? Do you believe they are reluctant due to fear of engine failure? Im surprised that more guys don't do the same thing your did with the cams. Your thoughts on this are appreciated.
Robert
 
#21 ·
I lost track but my best RWHP is 394 with a mid range dip; 386 with a good looking curve. That is up from 338 stock. I believe that is one of the better numbers out there. As for not many others doing the mods, I have no idea. I stayed away from Dinan, figuring the car was build in Germany so the best tuners ought to be in Germany...but I have a Euro which I brought over when I moved from the UK, which might influence my perspective. Funny enough the German tuners offer reasonable warranties for the cars in Europe and cars are servicable by BMW dealerships. The whole thing just breaks down with BMW NA...an animal of its own...that has nothing to do with BMW Europe.

The headers are the best bang for $...I have the original exhaust system sitting in my garage and it looks antique....believe me when you see it you wouldn't believ it came of an M car.

The cams are a pain to install. My local dealership had a lot of problems. Most owners don't want to open up the engine and like to stick with bolt ons. I guess the cams are border line since you are not touching the inners of the engine but you need to remove the valve covers and deal with the vanos.

In any case the combination works well, the awesome sound and increased performance is very noticable.

I hope that helps

Claus
 
#22 ·
where did you get the ss. headers from? and how much to install?
 
#23 ·
I bought the headers and cats from Evosport. Call them and use ext. 11 for Ben Kleinberg. You can tell him I referred you. He's very savvy on car matters and can answer any questions you might have.

Install costs can be variable...depends on your installers hourly rate and experience will dictate how long it will take. I'd say it's safe to say you're looking at 10 - 12 hours.
:cheers:
 
#24 ·
XrayMD said:
Just got back from Columbus, OH. after the install of the SS headers & cats, the Evosport custom 3.45 diff. and the RMS short shifter. The diff. was put in first by my dealer and a race shop put in the headers, etc. because I wanted to use their in-house dyno for pre & post dyno.





Next, SS header and cats: All I can say is wow! Expensive, but worth every penny.

I was somewhat disappointed by my pre-install dyno of 338.91HP and 317.53 for torque. I expect about a 30HP increase with the headers and software, but we'll see.

Finally, the RMS short shifter: This replaced my Rogue Octane shifter with WSR. I liked the Rogue a lot, but I still felt the throws were longer than I wanted. Effort was great and shifting was always precise, with no vibration. The RMS shifter is adjustable. I had it installed with the setting as it arrived to me. The throw fells significantly shorter than the Rogue and there is NO increased effort at all... why I'm not sure. The shifting is precise with a nice, prounounced "snick...snick". I am going to leave the setting where it is for now, but at sometime, I may try one setting shorter and see how that feels.
:cheers:

STEVE:

It's been a couple of months since you installed the RMS SSK and the SS Headers. Would like to give an updated assessment of HOW the car has been running and your "2-Month" review?

Did you ever get the Spftware installed to go along with the SS Headers?

IF so ... ->>
Did you ever Re-Dyno the car ... and IF you did ... WHAT were the results?

Have you changed the setting on the RMS SSK since the original install?

Are you HAPPY with the distance and smoothness of the NEW shifters' throw?

How does this shifter differ from the Rogue when the engine is COLD?
... i.e. the first start on an early morning sprint.

How would you compare the RMS SSK to the Rogue's Octane SSK now that you've had a while to get used to the new shifter?



CURIOUS MINDS WANT TO KNOW!!
 
#25 ·
yep, Ed hit the nail on the head... please tell...

thanks

Tin
 
#26 · (Edited)
Bring it on Steve, come on buddy, you have some posting to do.hiha J/K.

Yes I too am very interested in how your Beast is travelling/Flying. :flag:

Hey TIN,

Did you sought the Track mode yet on DFC?
 
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