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
 

Photo
- - - - -

Turbo cams


  • Please log in to reply
6 replies to this topic

#1 wiggles

wiggles

    New User

  • Members
  • Pip
  • 7 posts
  • Seattle

Posted 12 September 2004 - 06:08 AM

Has anyone with a ea82 put the cams from a turbo engine in a non turbo engine? I have a cracked head and I was thinking if i'm going to replace them I might as well see about getting a little more power. Thanks!!

#2 calebz

calebz

    Andys Coupe killed my cat

  • Administrator
  • 7,547 posts
  • Tacoma

Posted 12 September 2004 - 09:36 AM

I don't think there would be a whole lot of advantage in using the turbo ams on an NA motor.. They aren't really 'bigger' or ' more powerful' , they are simply ground for minimal valve overlap as is appropriate for a turbo motor.

If youj want better cams, look up delta cams in Tacoma.

Also, the wording of your post suggests that one must replace cams while replacing a cracked head. That is not the case. The cams are in their own self contained cam case seperate from the head.

#3 RallyKeith

RallyKeith

    Got Subaru(s)?

  • Members
  • 1,486 posts
  • Reading, Pa

Posted 12 September 2004 - 08:30 PM

Turbo cams in a Non-Turbo engine gives you less power. Let me give you some background.

A normally aspirated engine works on a Scavanging effect. What happens, is that as the piston is being pushed up to let the exhaust gas out, the moment before the piston reaches the top, the intake valve opens. This is what's called overlap. What happens is that the air rushing out of the exhaust valve acts like a vaccum and pulls the fresh air in from the intake valve, thus allowing more fresh air in for combustion and more power.

In a turbo car you are forcing the air into the cylinder chamber. So, as the piston is moving up and pushing the exhaust out of the open exhast valve you don't want to open the intake valve. If opened the intake before the exhaust valve was closed all the turbo boost pressure would blow through and you would lose pressure. That's why turbo cars feel so dead before the turbo comes on. Their cams are ground with little to no overlap, so until the boost comes up they don't get the scavanging effect and therfore less clean air to burn, less power.

So putting a turbo cam into a non-turbo car would give you noticabaly less power.

Like calebz said, delta cams are the way to go.
http://www.deltacam.com/

Keith

#4 GLCraig

GLCraig

    Livin' the live

  • Members
  • 2,706 posts
  • LV, Washington

Posted 12 September 2004 - 08:35 PM

you guys are forgetting something. the ea82t and Ea82 Carb use the same cam, well atleast they do for 85-86

#5 calebz

calebz

    Andys Coupe killed my cat

  • Administrator
  • 7,547 posts
  • Tacoma

Posted 13 September 2004 - 03:56 AM

you guys are forgetting something. the ea82t and Ea82 Carb use the same cam, well atleast they do for 85-86


87+ are different

#6 wiggles

wiggles

    New User

  • Members
  • Pip
  • 7 posts
  • Seattle

Posted 14 September 2004 - 02:14 AM

Where is a good source for cyl heads online?

#7 calebz

calebz

    Andys Coupe killed my cat

  • Administrator
  • 7,547 posts
  • Tacoma

Posted 14 September 2004 - 03:10 AM

Where is a good source for cyl heads online?


You're here.

Post a WTB in the market place..

Or try CCR in denver.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users