Weistec E55 at Etown runs 11.1s
05-07-2014, 11:22 AM
#52
MBWorld Fanatic!
This, didn't we just see an E55 run 10.5 or something... Stock blower with lower pulley, exhaust, tune... I think they spent like $8k in parts IF THAT (based on my quick math). I'm not even going to ask how much that super charger is. I'm trying not to hate but its hard to justify modifying internals and not hitting low low low 10s.
Driver error??
Driver error??
Just because someone decided to start a big build in a little smarter, cheaper (long term) and safer way doesn't mean that the 10.8 is his best pass.
10 psi... Come on he is just scratching the surface.
If the goal is to push the envelope, chase 9's, or just whip the snot out of everything you come across then starting with a forged and balanced built bottom end is the best money you can spend.....period!
I am aways baffled when people say "I am just going to keep pushing it until the block gives out" Its not like it isn't a catastrophic, wildly expensive and dangerous event when it does happen! Typically many other components are destroyed or compromised in the process...in more severe cases metal engine shaving run through oil pumps, intakes, forced injunction items...you name it.
Bravo to the Op for doing it the right way. Now they can play with ANY NUMBER of variables and won't have to worry about the block (provided they the tune the right way and I suspect they will)
Give it a some more time and these Wiestec units will be on EVERY supercharged 55's setting records and breaking hearts.
05-07-2014, 11:37 AM
#54
MBWorld Fanatic!
05-07-2014, 01:01 PM
#56
MBWorld Fanatic!
Join Date: Aug 2010
Location: Northern Va
Posts: 2,156
Likes: 0
Received 6 Likes
on
3 Posts
Dirt Scooters
Very nice!!!
I remember how excited I was when I ran 11.1 with my Weistec supercharger E55. Then Steve asked me, "want to get into the 10s?"
OK, how?? He put a couple of fans on the engine for about 40 minutes and WHAM, 10 second pass!!!!
No matter how you look at it, a full weight 4 door sedan running 10 second 1/4 miles is a very fast car!!
G
I remember how excited I was when I ran 11.1 with my Weistec supercharger E55. Then Steve asked me, "want to get into the 10s?"
OK, how?? He put a couple of fans on the engine for about 40 minutes and WHAM, 10 second pass!!!!
No matter how you look at it, a full weight 4 door sedan running 10 second 1/4 miles is a very fast car!!
G
. Your car was flying with that blower.
05-07-2014, 01:07 PM
#57
Former Vendor of MBWorld
Engine internals are something that's not needed until it's too late lol. Trust me when I tell you you don't want a windowed block and oil on your tires going down the track. You can keep pushing stock motors and I'm sure the 55k motor will put up big numbers (WITH A GOOD TUNE) but is it worth the risk? I have a 55k motor to throw in my CLK but I will wait and at least put pistons in it.
We advise building the motor when the car is making anything past 600 HP at the wheels. You can obviously make more than this and the engine might survive but it will be at the absolute limit. This just the case when it comes to standard alloy M8 sized rod bolts, and a high silicone piston that has design concepts based not only on performance.
Weistec Engineering
05-07-2014, 01:20 PM
#58
Former Vendor of MBWorld
What these high ratios will give and this is the downside, is added heat since you are spinning the rotors at a much higher rate. This is also why we offer a completely different cast aluminum inlet specifically made for the larger 82mm throttle body. More air flowing through the system give you the obvious power gains, but it also allows the system to run cooler. Hope this helps.
Weistec Engineering
05-07-2014, 03:52 PM
#59
MBWorld Fanatic!
I understand everything you are saying. I was just specifying that it was more than 12psi. Just because it has a 74mm doesn't mean it can't be making more than 12psi boost
05-07-2014, 03:58 PM
#60
Former Vendor of MBWorld
Given all the hardware we sell and a high flow exhaust system, these engines will peak at 16psi. That is with a stock size crank pulley, and our smallest upper pulley with the 82mm throttle body. On the M113, this is much different. More compression allows more boost given the same hardware (Peak numbers). Hope this helps.
Weistec Engineering
05-07-2014, 04:26 PM
#62
MBWorld Fanatic!
I don't like to assume but the "friend" that posted made it sound like that car is on stock exhaust. If so there's no way it's only pushing 10...or even 12psi!
Last edited by chiromikey; 05-07-2014 at 04:28 PM.
05-07-2014, 04:43 PM
#66
MBWorld Fanatic!
Why is there always second hand or third hand info on theses things, boost is 10psi, then 12psi, then most likely this or that, I think that is the reason more people are not jumping on these blowers.
05-07-2014, 04:48 PM
#67
Out Of Control!!
It is most likely making near 12 psi at high RPM's. It might peak past that at the lower RPM's, but where it counts (down the track) it is near that.
Given all the hardware we sell and a high flow exhaust system, these engines will peak at 16psi. That is with a stock size crank pulley, and our smallest upper pulley with the 82mm throttle body. On the M113, this is much different. More compression allows more boost given the same hardware (Peak numbers). Hope this helps.
Weistec Engineering
Given all the hardware we sell and a high flow exhaust system, these engines will peak at 16psi. That is with a stock size crank pulley, and our smallest upper pulley with the 82mm throttle body. On the M113, this is much different. More compression allows more boost given the same hardware (Peak numbers). Hope this helps.
Weistec Engineering
Hopefully the next time my car sees a track it will have better headers but it will definitely have at least forged pistons and rod bolts and ARP head studs. Can't wait to get my custom pistons from you guys
05-07-2014, 05:15 PM
#68
Former Vendor of MBWorld
A good comparison to the M113K market now is the domestic market. An owner of a Shelby GT-500 can easily purchase a supercharger system and hand over a base tune (or start with a clean slate) from the manufacturer to a hand full of tuners, or add E85 or long tube headers and a different pulley to customize to his/her needs and wants.
This was our intention for the M113K market because most E55 owners will enjoy installing parts themselves and gaining a better understanding of the car and our products. Hope this helps.
Weistec Engineering
Last edited by Weistec; 05-07-2014 at 05:21 PM.
05-07-2014, 05:16 PM
#69
Former Vendor of MBWorld
Yup. TB, headers and compression are critical factors for boost figures. This doesn't mean that more boost = more power. My stock crank pulley and smallest sc pulley (higher compression than 55k motor) with 82mm TB and very restrictive headers would hit 20PSI sometimes. That's with ported heads too. With a good set of headers I see that number dropping but with alot more power. At the end of the day the more air you force in and get out the motor, the more power you will make (with adequate fuel lol).
Hopefully the next time my car sees a track it will have better headers but it will definitely have at least forged pistons and rod bolts and ARP head studs. Can't wait to get my custom pistons from you guys
Hopefully the next time my car sees a track it will have better headers but it will definitely have at least forged pistons and rod bolts and ARP head studs. Can't wait to get my custom pistons from you guys
Weistec Engineering
05-07-2014, 08:58 PM
#70
Senior Member
Join Date: Apr 2006
Location: Passaic, NJ
Posts: 263
Likes: 0
Received 7 Likes
on
3 Posts
S600 Bi-Turbo/E39 M5
The black car in question is surely seeing 12psi at red line of 3rd. We put a digital AND mechanical boost gauge and took it for a ride to verify. That can go to bed. It also has long tube headers and high flow cats. We my change to 82mm TB and try and crack in to the 10s soon. Doing so will probably increase the boost to 14-15ish with the same pulley size. We will find out in a few weeks. Overall, I'm impressed with the system and the way it drives/feels over stock bkower.
05-07-2014, 09:32 PM
#71
MBWorld Fanatic!
05-08-2014, 01:04 PM
#72
Former Vendor of MBWorld
The black car in question is surely seeing 12psi at red line of 3rd. We put a digital AND mechanical boost gauge and took it for a ride to verify. That can go to bed. It also has long tube headers and high flow cats. We my change to 82mm TB and try and crack in to the 10s soon. Doing so will probably increase the boost to 14-15ish with the same pulley size. We will find out in a few weeks. Overall, I'm impressed with the system and the way it drives/feels over stock bkower.
Weistec Engineering
