legacycentral bbs

I have been guilty of advocating 2.5 heads on a 22T as the most likely Holy Grail. Of course my advocacy has been entirely conjecture from my ivory tower. Many thanks to Larry Witherspoon for sticking his neck out and exploring the bleeding edge of North American BC-BF performance. Larry, know that I support you to the last drop of your blood and your money right up to the point where it might actually cost me money. You have done a noble thing and I sincerely thank you. I have always found your research and conclusions to be carefully considered and dead-on. I hope that my misguided advocy of head swaps did not steer you wrong. So now where do we go?? I guess the new "Semi-Holy Grail" is modifications and porting of stock 22T heads. Does anyone know anything about this topic? I heard that the Byron offers some kind of engine work on 22T engines. Does anyone know any details?

Bill Robinson.

To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com



zZz <http://docs.yahoo.com/info/terms/> .

I find this so interesting because we use Subaru Outback EJ25 Quad
Cam heads on our EJ20 Quad Cam engines, the only difference is the
inlet manifold hole needs to be bored out to match out existing
manifold size.

Dan


To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com

Daniel i have just bought a set of 98 impreza heads for my UK legacy turbo
do you think i will have to change my pistons as well ?
----- Original Message -----
From: "Daniel Wilson" <daniel.wilson@db.co.nz>
To: <BC-BFLegacyWorks@yahoogroups.com>
Sent: Tuesday, November 06, 2001 7:47 PM
Subject: [BC-BFLegacyWorks] Re: Larry's 2.5 heads on 22T


> I find this so interesting because we use Subaru Outback EJ25 Quad
> Cam heads on our EJ20 Quad Cam engines, the only difference is the
> inlet manifold hole needs to be bored out to match out existing
> manifold size.
>
> Dan
>
>
> To unsubscribe from this group, please send an email to:
> BC-BFLegacyWorks-unsubscribe@egroups.com
>
>
>
>
>
>


To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com

No they use the same pistons. Unless of course you want some forgies.
Or if you get some pistons from the EJ20 twin turbo they are good for
constant 18PSI, some people say the are forged but they are not
really. To put it bluntly you will not find true forged pistons in a
Subaru unless it was an after market upgrade or specifically
requested from STI (very unlikely).

Dan


--- In BC-BFLegacyWorks@y..., "dfullerton.screaming.net"
<dfullerton@d...> wrote:
> Daniel i have just bought a set of 98 impreza heads for my UK
legacy turbo
> do you think i will have to change my pistons as well ?
> ----- Original Message -----
> From: "Daniel Wilson" <daniel.wilson@d...>
> To: <BC-BFLegacyWorks@y...>
> Sent: Tuesday, November 06, 2001 7:47 PM
> Subject: [BC-BFLegacyWorks] Re: Larry's 2.5 heads on 22T


To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com

Dan, Are the pistons you were refering to what the SAE paper I have
calls "thermoflow" in the 2.2t? They seem to be pretty sturdy and I
plan on testing them soon at around 15-18 lbs. These are a cast piston
but look like a different alloy or type of casting.
AL(CO)




--- In BC-BFLegacyWorks@y..., "Daniel Wilson" <daniel.wilson@d...>
wrote:
> No they use the same pistons. Unless of course you want some
forgies.
> Or if you get some pistons from the EJ20 twin turbo they are good
for
> constant 18PSI, some people say the are forged but they are not
> really. To put it bluntly you will not find true forged pistons in a
> Subaru unless it was an after market upgrade or specifically
> requested from STI (very unlikely).
>
> Dan
>
>
> --- In BC-BFLegacyWorks@y..., "dfullerton.screaming.net"
> <dfullerton@d...> wrote:
> > Daniel i have just bought a set of 98 impreza heads for my UK
> legacy turbo
> > do you think i will have to change my pistons as well ?
> > ----- Original Message -----
> > From: "Daniel Wilson" <daniel.wilson@d...>
> > To: <BC-BFLegacyWorks@y...>
> > Sent: Tuesday, November 06, 2001 7:47 PM
> > Subject: [BC-BFLegacyWorks] Re: Larry's 2.5 heads on 22T


To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com

Hi Troops,

Really gratifying to find my article so well received by some of you. Sometimes I hope I'm not writing too much, but I try to entertain myself as well as give good info.

Work on the 2.5 heads had already started when I pulled the plug so they will still be receiving the benefit of some very skillful upgrading. One of them is partially finished. Saw it today. It looks beautiful. Might have some before and after pix to post later. These heads will be the bomb for somebody who wants more out of an EJ25.

Does anybody know if the late model WRX heads are different from the early ones?
I have info that shows the early WRX head flow to be inferior to even the 22T heads.
If the new ones are up to par with the 2.5 heads and don't have the "problems", and have all the oil and water matchups as the 22T's, maybe that's another possibility.

This late bit of info came from well respected Subaru racer Joel Gat

Date: Tue, 6 Nov 2001 00:58:46 -0800
From: "Joel Gat" <monster_impreza@hotmail.com>
Subject: Re: 2.5 Heads On 2.2T Block - The Harsh Realities

Hello Larry,

Sorry I never had a chance to get back to you. Thanks for the wonderful information! One quick comment... people are seeing reliable 300 hp from turbo 2.5 motors... so the cam profile may not be ideal for a high-boost turbo, but it's just fine for a low boost, low-rpm turbo, where the relatively low overlap works out good for a turbo and for NA...

Just a thought, though you win on all other counts!

Joel




To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com



zZz <http://docs.yahoo.com/info/terms/> .

Larry-Your articles are both entertaining & informative-please keep the same energy & enthusiasm when you write. I had kicked the idea around myself concerning the 2.5 heads but had no idea where to start. Now, with your info, I`m going to investigate which heads flow better: 2.2T or 2.2NA, earlier or later models. There`s a source in Ala. called Paeco Industries that has a very informative catalogue & looks to be the best place to start. I found their phone no. in the back of Autoweek magazine & called them. Well worth the effort as their info seems spot-on & realistic. Anyone have actual dealings with these folks? The ultimate street engine (for those of us that believe that `some is good, more is better, too much is just right!) will be bullet-proof as well; it seems these folks have a formula for that. I`m going to be calling them somtime this month & ask a few questions concerning price & turn-around time. I`ll let you know...---ROD (AZ.)

----- Original Message -----
From: ssspoon@aol.com
To: BC-BFLegacyWorks@yahoogroups.com ; STi_Mlist@imprezawrx.org
Sent: Wednesday, November 07, 2001 26 AM
Subject: [BC-BFLegacyWorks] Re: Larry's 2.5 heads on 22T

Hi Troops,

Really gratifying to find my article so well received by some of you. Sometimes I hope I'm not writing too much, but I try to entertain myself as well as give good info.

Work on the 2.5 heads had already started when I pulled the plug so they will still be receiving the benefit of some very skillful upgrading. One of them is partially finished. Saw it today. It looks beautiful. Might have some before and after pix to post later. These heads will be the bomb for somebody who wants more out of an EJ25.

Does anybody know if the late model WRX heads are different from the early ones?
I have info that shows the early WRX head flow to be inferior to even the 22T heads.
If the new ones are up to par with the 2.5 heads and don't have the "problems", and have all the oil and water matchups as the 22T's, maybe that's another possibility.

This late bit of info came from well respected Subaru racer Joel Gat

Date: Tue, 6 Nov 2001 00:58:46 -0800
From: "Joel Gat" <monster_impreza@hotmail.com>
Subject: Re: 2.5 Heads On 2.2T Block - The Harsh Realities

Hello Larry,

Sorry I never had a chance to get back to you. Thanks for the wonderful information! One quick comment... people are seeing reliable 300 hp from turbo 2.5 motors... so the cam profile may not be ideal for a high-boost turbo, but it's just fine for a low boost, low-rpm turbo, where the relatively low overlap works out good for a turbo and for NA...

Just a thought, though you win on all other counts!

Joel




To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com



zZz <http://docs.yahoo.com/info/terms/> .



To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com



zZz <http://docs.yahoo.com/info/terms/> .

Yes that is correct, and yes that is correct they use a different
type of alloy that has a stronger grain. So they will be good for
18PSI constant boost, go much higher in constant boost and they
destroy themselves. (Note I am not refering to Peak boost which could
be up in the region of 20-22PSI)

Dan

--- In BC-BFLegacyWorks@y..., acroxford@h... wrote:
> Dan, Are the pistons you were refering to what the SAE paper I
have
> calls "thermoflow" in the 2.2t? They seem to be pretty sturdy and I
> plan on testing them soon at around 15-18 lbs. These are a cast
piston
> but look like a different alloy or type of casting.
> AL(CO)



------------------------ ---------------------~-->
Universal Inkjet Refill Kit $29.95
Refill any ink cartridge for less!
Includes black and color ink.
http://us.click.yahoo.com/bAmslD/MkNDAA ... /XoTolB/TM
---------------------------------------------------------------------~->

To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com

Yes the WRX Version 3 heads are what you want they use large buckets,
so you have more flexiblity with your cam profiles. Should be found
in the 1998 year.

Dan

--- In BC-BFLegacyWorks@y..., ssspoon@a... wrote:
> Hi Troops,
>
> Really gratifying to find my article so well received by some of
you.
> Sometimes I hope I'm not writing too much, but I try to entertain
myself as
> well as give good info.
>
> Work on the 2.5 heads had already started when I pulled the plug so
they will
> still be receiving the benefit of some very skillful upgrading.
One of them
> is partially finished. Saw it today. It looks beautiful. Might
have some
> before and after pix to post later. These heads will be the bomb
for
> somebody who wants more out of an EJ25.
>
> Does anybody know if the late model WRX heads are different from
the early
> ones?
> I have info that shows the early WRX head flow to be inferior to
even the 22T
> heads.
> If the new ones are up to par with the 2.5 heads and don't have the
> "problems", and have all the oil and water matchups as the 22T's,
maybe
> that's another possibility.
>
> This late bit of info came from well respected Subaru racer Joel Gat



------------------------ ---------------------~-->
Universal Inkjet Refill Kit $29.95
Refill any ink cartridge for less!
Includes black and color ink.
http://us.click.yahoo.com/ltH6zA/MkNDAA ... /XoTolB/TM
---------------------------------------------------------------------~->

To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com