Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

MPFI power?

  • Please log in to reply
6 replies to this topic



    USMB Reverend

  • Members
  • 618 posts
  • Jersey Shore (Central) PA

Posted 05 December 2003 - 12:10 PM

what else could you do to get more power out of a mpfi other than:
air intake
spider intake
advance timing
better exhaust
better cam
port matching the exhaust
accel superstock coil
mallory 8mm plug wires
NGK plugs gapped to .45 - .50
what else?

also, how much HP do you think this would have and how much of that is from the cam?

I don't know the science of cams, can a reground one give me better power while keeping the power-band the same? (I don't want a low-end monster thats slow or a top-end beast that is gutless below 5 grand. Of course I am exagerating, but you get my point.:D


#2 Skip


    Flatuous Blather

  • Moderator
  • 8,991 posts
  • Latrobe, Pennsylvania

Posted 05 December 2003 - 12:29 PM

ask Will
hotter ignition w/a bit wider plug gap

#3 justyfied


    USMB Regular

  • Members
  • PipPipPip
  • 39 posts
  • williamsport

Posted 05 December 2003 - 12:52 PM

the cylinder heads are where most of the potential power lies. given the same perameters. (cubic inch, compression, fuel) the problem is that most do not have access to a flow bench. i would try port matching the exhaust. you do not want to do this to the intake side as it will create more of a puddling effect. just a suggestion. good luck



    USMB Reverend

  • Members
  • 618 posts
  • Jersey Shore (Central) PA

Posted 08 December 2003 - 08:25 PM


Check out my update at the top.


#5 svxpert


    Certified Subaru Nut

  • Members
  • 777 posts
  • East Coast

Posted 08 December 2003 - 09:29 PM

How about a turbo?

#6 WJM



  • Members
  • 7,828 posts

Posted 08 December 2003 - 11:22 PM

non turbo engines already have 9.5:1 compression. Its all about how much air and fuel you can get into the combustion chamber....from there, its kinda a science of compbusting it correctly, and then getting it out of the CombChamb quickly.

With some small reground cams, and your list of mods...and a spyder intake, id say 140 is not out of the question.

With turbo...money is the limit.

I read about these older F1 cars, making like, 1000~1500 HP, with small 4 cyl engines....73psi of boost on 102 octane!!!



    USMB Reverend

  • Members
  • 618 posts
  • Jersey Shore (Central) PA

Posted 09 December 2003 - 12:42 PM

Alright, that seems to be all the mods for the engine right?

so, now the exhaust:
What would be a good diameter? 2 inches maybe?, I don't want steal from low end very much.

what measurement for a camgrind? again, I would like to rty to keep a good balance.


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users