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Thread: HPF: 2.5 or 3

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    HPF: 2.5 or 3

    I am going to upgrade my current Stage 2, HPF M3 to a more potent, Stage 2.5 or 3.

    I need your help to decide which kit to go with.

    A little background: the car is driven once a week, and has less than 14k miles; I live in Cali - hence, a glutton for punishment, and no need for unwanted/addtl attention (I.e. loud exhaust; flames...); my Meth setup has functioned without a hiccup; I have yet to break into the 10s in the 1/4 mile - note to self: get some new DRs

    Let's hear your arguments for/against either stage!

    Sent from my iPhone using Tapatalk

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    Click here to enlarge Originally Posted by AirFrcd Click here to enlarge
    I am going to upgrade my current Stage 2, HPF M3 to a more potent, Stage 2.5 or 3.

    I need your help to decide which kit to go with.

    A little background: the car is driven once a week, and has less than 14k miles; I live in Cali - hence, a glutton for punishment, and no need for unwanted/addtl attention (I.e. loud exhaust; flames...); my Meth setup has functioned without a hiccup; I have yet to break into the 10s in the 1/4 mile - note to self: get some new DRs

    Let's hear your arguments for/against either stage!

    Sent from my iPhone using Tapatalk
    That's a tough one Bro, but if you look at Scott's success it's hard not to want the 2.5, but maybe someone needs to break some ground with the Stage 3. Click here to enlarge Can't go wrong either way, both have their pluses. BUT we are going to get your car in the 10's first!
    08 E92 M3 - DCT
    Bolt Ons - Best ET 11.88 Best Trap Speed 119.8 MPH
    60-130 MPH (3 shifts) 10.71s
    Gintani Stage 2+ Supercharger 60-130MPH (3 shifts) 7.06s
    11.45 @ 131.6 MPH
    579WHP @9.3psi

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    Power rules the day for me. However, as Drew stated, you can not go wrong with either one.

    Are you planning on doing this soon? We need to run before that. I think I can do it this weekend, shoot me a PM.

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    Re: HPF: 2.5 or 3

    PM sent!


    Sent from my iPhone using Tapatalk

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Power rules the day for me. However, as Drew stated, you can not go wrong with either one.

    Are you planning on doing this soon? We need to run before that. I think I can do it this weekend, shoot me a PM.
    J, what wheels are you going with? Are you staying with 19's or going 18's?
    08 E92 M3 - DCT
    Bolt Ons - Best ET 11.88 Best Trap Speed 119.8 MPH
    60-130 MPH (3 shifts) 10.71s
    Gintani Stage 2+ Supercharger 60-130MPH (3 shifts) 7.06s
    11.45 @ 131.6 MPH
    579WHP @9.3psi

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    Click here to enlarge Originally Posted by DLSJ5 Click here to enlarge
    J, what wheels are you going with? Are you staying with 19's or going 18's?
    For the street?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    For the street?
    Yeah.
    08 E92 M3 - DCT
    Bolt Ons - Best ET 11.88 Best Trap Speed 119.8 MPH
    60-130 MPH (3 shifts) 10.71s
    Gintani Stage 2+ Supercharger 60-130MPH (3 shifts) 7.06s
    11.45 @ 131.6 MPH
    579WHP @9.3psi

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    Click here to enlarge Originally Posted by DLSJ5 Click here to enlarge
    Yeah.
    When I do runs I will use my radials for now.

    I was planning on running the Pirelli Corsa System on my 19's for the street.

    If I get too carried away with power, Nitto has a new 19 inch and 20 inch drag radial.

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    I would go with the 2.5, you can always go stage 3 later.

    Stage 3 is going to cost you a lot more money since you ave to swap turbo's and upgrade your fuel system.

    IMO, it's hard enough to put the power of stage 2.5 to the ground, so why add more?

    We'll see how my attitude changes once I get my car back though.

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    Click here to enlarge Originally Posted by MSpiredM3 Click here to enlarge
    I would go with the 2.5, you can always go stage 3 later.

    Stage 3 is going to cost you a lot more money since you ave to swap turbo's and upgrade your fuel system.

    IMO, it's hard enough to put the power of stage 2.5 to the ground, so why add more?

    We'll see how my attitude changes once I get my car back though.
    I hear you. I can't wait to hear your impressions of the 2.5!!!!
    The 2.5 sounds incredible from all the reviews, but the stage 3 sounds sooo tempting...

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    Click here to enlarge Originally Posted by AirFrcd Click here to enlarge
    I hear you. I can't wait to hear your impressions of the 2.5!!!!
    The 2.5 sounds incredible from all the reviews, but the stage 3 sounds sooo tempting...
    He is right... you can always go to the 3 later...

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    Well here is my 2 cents:

    1 - Stage 2.5's fuel system maxes around ~600-620WHP. Meth is used to compensate for the smaller fuel system when running high boost. If you look at the dynos, power drops off pretty hard at 6500rpm. My particular dyno showed a 65whp drop from 6500rpm to 8000rpm in high boost.
    2 - Stage 3 pump map delivers ~635whp. The new billet wheel 71mm turbo spools very well. When you lay the 2.5 and 3 pump and race graphs, there is very little difference except stage 3 obviously climbs higher and is more linear, especially in high boost.
    3 - Stage 3 uses 1100cc injectors, high impedance drivers and a new fuel rail. This gives some overhead and better longevity since it is not maxing out the system like 2.5 when running in high boost. No issue on low boost.
    4 - Stage 3 race gas mode makes ~780whp. You dont need to use the meth system since the meth only buys about 40whp and you wont need that unless your doing 200mph.
    5 - This is a weekend car, why settle for 2.5's 680whp max when you can have 820whp.
    6 - HPF needs some records set by Stage 3 and you would be an excellent candidate. Hell, you might convince some 2.5 owners to upgrade.

    Since your thinking Stage 2.5 or 3, its not cost thats the driving force, but which kit will make you the happiest. If I was in your shoes (I wish), I would pick Stage 3 all the way man!

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    Click here to enlarge Originally Posted by st06m3 Click here to enlarge
    Well here is my 2 cents:

    1 - Stage 2.5's fuel system maxes around ~600-620WHP. Meth is used to compensate for the smaller fuel system when running high boost. If you look at the dynos, power drops off pretty hard at 6500rpm. My particular dyno showed a 65whp drop from 6500rpm to 8000rpm in high boost.
    2 - Stage 3 pump map delivers ~635whp. The new billet wheel 71mm turbo spools very well. When you lay the 2.5 and 3 pump and race graphs, there is very little difference except stage 3 obviously climbs higher and is more linear, especially in high boost.
    3 - Stage 3 uses 1100cc injectors, high impedance drivers and a new fuel rail. This gives some overhead and better longevity since it is not maxing out the system like 2.5 when running in high boost. No issue on low boost.
    4 - Stage 3 race gas mode makes ~780whp. You dont need to use the meth system since the meth only buys about 40whp and you wont need that unless your doing 200mph.
    5 - This is a weekend car, why settle for 2.5's 680whp max when you can have 820whp.
    6 - HPF needs some records set by Stage 3 and you would be an excellent candidate. Hell, you might convince some 2.5 owners to upgrade.

    Since your thinking Stage 2.5 or 3, its not cost thats the driving force, but which kit will make you the happiest. If I was in your shoes (I wish), I would pick Stage 3 all the way man!
    Excellent post!

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    I agree, if you are building a motor then use the best fuel delivery possible and get a turbo that will flow the psi this motor can handle up top.

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    Click here to enlarge Originally Posted by st06m3 Click here to enlarge
    Well here is my 2 cents:

    1 - Stage 2.5's fuel system maxes around ~600-620WHP. Meth is used to compensate for the smaller fuel system when running high boost. If you look at the dynos, power drops off pretty hard at 6500rpm. My particular dyno showed a 65whp drop from 6500rpm to 8000rpm in high boost.
    2 - Stage 3 pump map delivers ~635whp. The new billet wheel 71mm turbo spools very well. When you lay the 2.5 and 3 pump and race graphs, there is very little difference except stage 3 obviously climbs higher and is more linear, especially in high boost.
    3 - Stage 3 uses 1100cc injectors, high impedance drivers and a new fuel rail. This gives some overhead and better longevity since it is not maxing out the system like 2.5 when running in high boost. No issue on low boost.
    4 - Stage 3 race gas mode makes ~780whp. You dont need to use the meth system since the meth only buys about 40whp and you wont need that unless your doing 200mph.
    5 - This is a weekend car, why settle for 2.5's 680whp max when you can have 820whp.
    6 - HPF needs some records set by Stage 3 and you would be an excellent candidate. Hell, you might convince some 2.5 owners to upgrade.

    Since your thinking Stage 2.5 or 3, its not cost thats the driving force, but which kit will make you the happiest. If I was in your shoes (I wish), I would pick Stage 3 all the way man!
    Pretty convincing post!
    08 E92 M3 - DCT
    Bolt Ons - Best ET 11.88 Best Trap Speed 119.8 MPH
    60-130 MPH (3 shifts) 10.71s
    Gintani Stage 2+ Supercharger 60-130MPH (3 shifts) 7.06s
    11.45 @ 131.6 MPH
    579WHP @9.3psi

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    Click here to enlarge Originally Posted by st06m3 Click here to enlarge
    Well here is my 2 cents:

    1 - Stage 2.5's fuel system maxes around ~600-620WHP. Meth is used to compensate for the smaller fuel system when running high boost. If you look at the dynos, power drops off pretty hard at 6500rpm. My particular dyno showed a 65whp drop from 6500rpm to 8000rpm in high boost.
    2 - Stage 3 pump map delivers ~635whp. The new billet wheel 71mm turbo spools very well. When you lay the 2.5 and 3 pump and race graphs, there is very little difference except stage 3 obviously climbs higher and is more linear, especially in high boost.
    3 - Stage 3 uses 1100cc injectors, high impedance drivers and a new fuel rail. This gives some overhead and better longevity since it is not maxing out the system like 2.5 when running in high boost. No issue on low boost.
    4 - Stage 3 race gas mode makes ~780whp. You dont need to use the meth system since the meth only buys about 40whp and you wont need that unless your doing 200mph.
    5 - This is a weekend car, why settle for 2.5's 680whp max when you can have 820whp.
    6 - HPF needs some records set by Stage 3 and you would be an excellent candidate. Hell, you might convince some 2.5 owners to upgrade.

    Since your thinking Stage 2.5 or 3, its not cost thats the driving force, but which kit will make you the happiest. If I was in your shoes (I wish), I would pick Stage 3 all the way man!
    Excellent post, but I'd add that Stage 3's other major upgrade is to the ignition system (factory coils are a weak point with 2.5).

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    Click here to enlarge Originally Posted by spdu4ea Click here to enlarge
    Excellent post, but I'd add that Stage 3's other major upgrade is to the ignition system (factory coils are a weak point with 2.5).
    No reason that could not be had on the 2.5.

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    Click here to enlarge Originally Posted by spdu4ea Click here to enlarge
    Excellent post, but I'd add that Stage 3's other major upgrade is to the ignition system (factory coils are a weak point with 2.5).
    Good point! But Lawrence already has Okada coils so he is good to go. Stage 2.5 and 3 use the same spark plugs too.

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    Click here to enlarge Originally Posted by st06m3 Click here to enlarge
    Well here is my 2 cents:

    1 - Stage 2.5's fuel system maxes around ~600-620WHP. Meth is used to compensate for the smaller fuel system when running high boost. If you look at the dynos, power drops off pretty hard at 6500rpm. My particular dyno showed a 65whp drop from 6500rpm to 8000rpm in high boost.
    2 - Stage 3 pump map delivers ~635whp. The new billet wheel 71mm turbo spools very well. When you lay the 2.5 and 3 pump and race graphs, there is very little difference except stage 3 obviously climbs higher and is more linear, especially in high boost.
    3 - Stage 3 uses 1100cc injectors, high impedance drivers and a new fuel rail. This gives some overhead and better longevity since it is not maxing out the system like 2.5 when running in high boost. No issue on low boost.
    4 - Stage 3 race gas mode makes ~780whp. You dont need to use the meth system since the meth only buys about 40whp and you wont need that unless your doing 200mph.
    5 - This is a weekend car, why settle for 2.5's 680whp max when you can have 820whp.
    6 - HPF needs some records set by Stage 3 and you would be an excellent candidate. Hell, you might convince some 2.5 owners to upgrade.

    Since your thinking Stage 2.5 or 3, its not cost thats the driving force, but which kit will make you the happiest. If I was in your shoes (I wish), I would pick Stage 3 all the way man!
    Great post and arguments coming from Jim for going Stage 3 over 2.5. (Of course, I wouldn't expect anything less =-)) Thank YOU!

    I spoke with Scott at length last night. His recommendation was stage 2.5 b/c of the lack of Turbo lag. (He did however mention that the car reaches its max output at approx. 170mph (identified by a siren), as the cars fuel system reaches its terminal output.)
    He favored the Stg 2.5 as well for its ability to "dominate" the 60-130mph times.

    I am still on the fence guys, albeit, I am leaning towards the "greener grass" of the Stage 3.

    Let's keep this thread/banter going. Good stuff!!

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    Click here to enlarge Originally Posted by AirFrcd Click here to enlarge
    I spoke with Scott at length last night. His recommendation was stage 2.5 b/c of the lack of Turbo lag. (He did however mention that the car reaches its max output at approx. 170mph (identified by a siren), as the cars fuel system reaches its terminal output.)
    He favored the Stg 2.5 as well for its ability to "dominate" the 60-130mph times.
    Stage 3 still spools faster than stage 2:

    Click here to enlarge

    I do agree that stage 2.5 would be tough to beat for 60-130 -- just because its already at the limits of traction through 90mph...

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    Click here to enlarge Originally Posted by AirFrcd Click here to enlarge
    He favored the Stg 2.5 as well for its ability to "dominate" the 60-130mph times.
    Scott is the 60-130 king.

    No disrespect to the other Stage 3 owners, but none of them have really tried to make a good 60-130 run, so the jury is still out on that.

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    Re: HPF: 2.5 or 3

    Click here to enlarge Originally Posted by st06m3

    Scott is the 60-130 king.

    No disrespect to the other Stage 3 owners, but none of them have really tried to make a good 60-130 run, so the jury is still out on that.
    I hear some guy in AZ is getting ready to inhilate the 2.5 record :-)

    Sent from my iPhone using Tapatalk

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    Click here to enlarge Originally Posted by AirFrcd Click here to enlarge
    I hear some guy in AZ is getting ready to inhilate the 2.5 record :-)

    Sent from my iPhone using Tapatalk
    Really, WHO?.....LOL.

    Trying man, but that 5.75s time is killer.

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    If you can spare the extra money might as well go stage 3. I am really thinking about getting a used M3 and geting the stage 3 kit when I am finished with my 135.
    Last edited by blk135; 02-13-2010 at 05:08 PM.

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    Click here to enlarge Originally Posted by st06m3 Click here to enlarge
    Scott is the 60-130 king.

    No disrespect to the other Stage 3 owners, but none of them have really tried to make a good 60-130 run, so the jury is still out on that.
    Agreed and I have a lot of respect for Scott and what he's accomplished with his M3, the guy flat out loves these cars and he knows his stuff.
    08 E92 M3 - DCT
    Bolt Ons - Best ET 11.88 Best Trap Speed 119.8 MPH
    60-130 MPH (3 shifts) 10.71s
    Gintani Stage 2+ Supercharger 60-130MPH (3 shifts) 7.06s
    11.45 @ 131.6 MPH
    579WHP @9.3psi

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