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Old 04-02-2012, 07:20 PM   #1
HPF Chris
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Thumbs Up Andy's HPF Stage 3 "SLEEPER VERSION" w/833rwhp SAE on Race+Meth

Andy wanted the big power of the stage 3 but without the loud 4" exhaust that comes with the stage 3 kit. So we ran the HPF Stage 3 on his car with an HPF Stage 4 FMIC, open dump stage 1 downpipe paired with the BMW midpipe and an HPF Titanium exhaust. The motor was built with the added strength of the HPF sleeved block which is now in quite a few M3s today including the new HPF Track motor.

The power in this car is amazing. It pulls like a runaway freight train but is still pretty quiet. No droning and yet it makes even more than the standard HPF Stage 3 stuff. Exciting stuff. Congrats Andy. I can't wait for you to feel the power!!



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Last edited by HPF Chris; 04-08-2012 at 03:25 AM.
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Old 04-02-2012, 08:43 PM   #2
Hobbit382
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nice runs, thanks for posting with 0 smoothing.

so the hpf titanium exhaust is a bit quieter than the stage 3? I like quiet
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Old 04-02-2012, 08:47 PM   #3
Ky///m3
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Originally Posted by Hobbit382 View Post
nice runs, thanks for posting with 0 smoothing.

so the hpf titanium exhaust is a bit quieter than the stage 3? I like quiet
the titanium exhaust pairs up with the stock midsection, the hpf stage 3/4 exhaust is a 4 inch all the way back
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Old 04-02-2012, 08:50 PM   #4
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the titanium exhaust pairs up with the stock midsection, the hpf stage 3/4 exhaust is a 4 inch all the way back
good to know, is it listed on their site yet?
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Old 04-02-2012, 08:55 PM   #5
Ky///m3
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good to know, is it listed on their site yet?
i just looked at the main HPF turbo m3 page and did not see where it listed the difference. it only shows the stage 3/4 exhaust setup, not the HPF ti exhaust for the stock mids
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Old 04-02-2012, 09:53 PM   #6
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Wow that is quiet, make me want another HPF M3
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Old 04-02-2012, 10:02 PM   #7
Ky///m3
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Wow that is quiet, make me want another HPF M3
Not trying to derail the thread but mytran, what's your vette putting down?
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Old 04-02-2012, 10:35 PM   #8
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Not trying to derail the thread but mytran, what's your vette putting down?
505 whp with just some bolt on and a Tune, it will be TT in a couple of months unless I decided to build a E92 M3 DCT
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Old 04-03-2012, 04:00 PM   #9
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So, why have a Stage 3 and a 4 inch exhaust? Perhaps only under the most extreme builds or simply wanting the nioise all the time.

The numbers are too good not to go this way of the sleeper exhaust in almost all cases. An on demand exhaust cut out can always be added for what ever reasons. Sounds like best of all worlds.

Chris, how would the car sound by substituting a Borla V2 Mid pipe(deeper tone?) Will that flow as well or better than the OEM STOCK SECTION? What about no mid pipe? Would it drone with no mid pipe?
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Old 04-03-2012, 10:28 PM   #10
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Nice results. I am looking for the same power range when I upgrade to PT71 and maintaining my stock exhaust system.
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Old 04-04-2012, 10:09 AM   #11
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Originally Posted by Bdave View Post
So, why have a Stage 3 and a 4 inch exhaust? Perhaps only under the most extreme builds or simply wanting the nioise all the time.

The numbers are too good not to go this way of the sleeper exhaust in almost all cases. An on demand exhaust cut out can always be added for what ever reasons. Sounds like best of all worlds.

Chris, how would the car sound by substituting a Borla V2 Mid pipe(deeper tone?) Will that flow as well or better than the OEM STOCK SECTION? What about no mid pipe? Would it drone with no mid pipe?
I believe we did a car with the Borla exhaust system and it was down 60rwhp over the HPF titanium. My guys can correct me if I'm wrong on that one.

Chris.
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Old 04-02-2012, 10:25 PM   #12
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If anyone wants a loud 4" HPF exhaust (Lawrence edition with 3 resonators) I'm thinking about selling mine...PM offers.

Two of the resonators don't really count they're Vibrant Race Resonators only like 3" a piece. The main Vibrant resonator is about a foot. It has a lower tone than the standard HPF 4" exhaust; more growl like a V8...has more drone in my opinion. I wear earplugs after 15minutes...sounds wicked around town; not so great for long drives. Also one exhaust ticket...not buttering it up this exhaust sounds wicked but there are drawbacks.
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Old 04-03-2012, 10:33 PM   #13
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Looking good!
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Old 04-04-2012, 10:08 AM   #14
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Looking good!
Thanks Mike.

Quote:
Originally Posted by ST06M3
Nice results. I am looking for the same power range when I upgrade to PT71 and maintaining my stock exhaust system.
It's nice to know the stock dual exhaust system design can flow this much. Make sure you run a high flowing exhaust though. We've found over 60rwhp differences between exhaust systems at these power levels!

Chris.
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Old 04-04-2012, 07:39 PM   #15
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I believe my Eisenmann exhaust was the exhaust with the lowest numbers. Not very good on a FI M3.
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Old 04-08-2012, 03:25 AM   #16
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I added more pics of Andy's car to the first post.
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Old 04-09-2012, 09:38 AM   #17
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I had the Eisemann sport. HPF said my car dynoed lower then everyone and asked if they could try different exhaust setups. What they found were stock was 10rwhp higher then the sport and the AP was 20 rwhp more
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Old 04-09-2012, 11:16 PM   #18
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I had the Eisemann sport. HPF said my car dynoed lower then everyone and asked if they could try different exhaust setups. What they found were stock was 10rwhp higher then the sport and the AP was 20 rwhp more
Fabio I have the Eisenmann Race and pulled 640rwhp on Race and Meth
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Old 04-11-2012, 07:31 PM   #19
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Fabio I have the Eisenmann Race and pulled 640rwhp on Race and Meth
Looks like the race version was less restricted then the sport. Now we know. Lol
Your car doesn't count. It's a freakin beast.
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