Josh Colombo" <josh@surrealmirage.com> writes,
asking of 2.5 RS cylinder heads
Larry.....do you think these heads would fit on a 2.2 N/A engine without the issues you've run across for the 2.2 turbo...
Hi Josh,
First time I have considered that question.
The BIG problems for me were turbo oil and turbo water related deficiencies.
There were a few other design variances between the 2.2T and the 2.5 N/A
They may or may not be a problem with a 2.2 N/A to 2.5 N/A swap
The 2.2T cylinder heads would require new cylinder head gaskets.
The water ports have been repositioned to match the passages in the cylinder block which is closed deck.
The 2.2 NA and 2.5 N/A are both open deck so maybe that won't be a problem
Another domino effect may be different port to port distances or manifold stud pattern, either one of which would necessitate a different manifold, which is not too bad, but you might want to check to see if that would mean a different throttle body. If the new throttle body means a different ECU, and maybe a wiring harness modification, there you go.
But those are way outside things that probably won't happen. It's just that Murphy's law might kick in, so if you don't check, there might be an incompatibility.
If all the associated accessories bolt on, there's a another small detail to consider.
The 2.5 head has a bore of 99.5 millimeters, which is 2.6 mm larger than the 96.9 mm 2.2 block bore. You'll have a 1.3 mm larger step all the way around the 2.2 cylinder bore where it mates to the 2.5 head. IF the piston doesn't come up far enough for it to be a problem with the rings, that would have the effect of lowering your compression, which could be good, if you plan to force induction. Otherwise the heads can be worked to give you any compression you want.
After saying all that, since we know there are those who HAVE gone the extra kilometer to make the 2.5 heads work on a 2.2T, it should be even easier to adapt them to a 2.2 N/A. If Murphy would give us a break, maybe they would really be truly a bolt on bonanza.
So thank you Josh for giving me the intro I needed to run my ad again.
Complete left and right cylinder head assemblies from 2001 Imprezza 2.5 RS
Phase II SOHC design, solid lifters, roller rockers
Deburred, ported, polished, multi angle valve grind
by Dan Paramore Racing (DPR)
Gardena, CA
310-523-4074
dan@dpr-racing.com
http://www.dpr-racing.com
Check DPR website for 2001 Land Speed Records
Ceramic thermal barrier coated valves
by Swain Technology
Scottsville, New York
716-889-2786
http://www.swaintech.com/
$1800 outright or $1500 exchange
I will pick up the cost of shipping in North America
I will split the cost of shipping outside of North America
Digital pix available on request - they look good
The work done was calculated to be that which would result in the greatest improvement to the stock condition. The cost of any additional work, if desired, would still benefit from the savings realized on the work done to this point, and by the fact that the heads are still disassembled at DPR awaiting instructions.
Larry Witherspoon
Torrance (Los Angeles)
562-982-7720
ssspoon@aol.com
Larry Witherspoon
4260 W 182nd St.
Torrance (Los Angeles), CA 90504
day/office phone 562-982-7720
larry.d.witherspoon@boeing.com
ssspoon@aol.com
2.5 N/A heads on a 2.2 N/A
Moderators: Helpinators, Moderators
-
georgerbyrne
2.5 N/A heads on a 2.2 N/A
You guys are always talking about the 2.5 heads, but my question is
WHY???
The only advantage i have heard is better flow rates, which could be
done alot cheaper to the EJ22 heads!
If you want to change heads, why not go the whole hog and bolt on the
quad cam heads. (they bolt straight on) Sure it will require an
aftermarket ecu or a chip, but it would give much greater potential
and gains!
Sorry if these seems a little hostile, have been studying all day and
hav a headache, and have always wondered what the attraction of the
heads is..?
George, Australia.
--- In BC-BFLegacyWorks@y..., ssspoon@a... wrote:
> Josh Colombo" <josh@s...> writes,
> asking of 2.5 RS cylinder heads
>
> Larry.....do you think these heads would fit on a 2.2 N/A engine
without the
> issues you've run across for the 2.2 turbo...
>
> Hi Josh,
>
> First time I have considered that question.
>
> The BIG problems for me were turbo oil and turbo water related
deficiencies.
>
> There were a few other design variances between the 2.2T and the
2.5 N/A
> They may or may not be a problem with a 2.2 N/A to 2.5 N/A swap
>
>
> The 2.2T cylinder heads would require new cylinder head gaskets.
> The water ports have been repositioned to match the passages in the
cylinder
> block which is closed deck.
> The 2.2 NA and 2.5 N/A are both open deck so maybe that won't be a
problem
>
> Another domino effect may be different port to port distances or
manifold
> stud pattern, either one of which would necessitate a different
manifold,
> which is not too bad, but you might want to check to see if that
would mean a
> different throttle body. If the new throttle body means a
different ECU, and
> maybe a wiring harness modification, there you go.
>
> But those are way outside things that probably won't happen. It's
just that
> Murphy's law might kick in, so if you don't check, there might be
an
> incompatibility.
>
> If all the associated accessories bolt on, there's a another small
detail to
> consider.
>
> The 2.5 head has a bore of 99.5 millimeters, which is 2.6 mm larger
than the
> 96.9 mm 2.2 block bore. You'll have a 1.3 mm larger step all the
way around
> the 2.2 cylinder bore where it mates to the 2.5 head. IF the
piston doesn't
> come up far enough for it to be a problem with the rings, that
would have the
> effect of lowering your compression, which could be good, if you
plan to
> force induction. Otherwise the heads can be worked to give you any
> compression you want.
>
> After saying all that, since we know there are those who HAVE gone
the extra
> kilometer to make the 2.5 heads work on a 2.2T, it should be even
easier to
> adapt them to a 2.2 N/A. If Murphy would give us a break, maybe
they would
> really be truly a bolt on bonanza.
>
> So thank you Josh for giving me the intro I needed to run my ad
again.
>
>
> Complete left and right cylinder head assemblies from 2001 Imprezza
2.5 RS
> Phase II SOHC design, solid lifters, roller rockers
>
> Deburred, ported, polished, multi angle valve grind
> by Dan Paramore Racing (DPR)
> Gardena, CA
> 310-523-4074
> dan@d...
> http://www.dpr-racing.com
> Check DPR website for 2001 Land Speed Records
>
> Ceramic thermal barrier coated valves
> by Swain Technology
> Scottsville, New York
> 716-889-2786
> http://www.swaintech.com/
>
> $1800 outright or $1500 exchange
>
> I will pick up the cost of shipping in North America
> I will split the cost of shipping outside of North America
>
> Digital pix available on request - they look good
>
> The work done was calculated to be that which would result in the
greatest
> improvement to the stock condition. The cost of any additional
work, if
> desired, would still benefit from the savings realized on the work
done to
> this point, and by the fact that the heads are still disassembled
at DPR
> awaiting instructions.
>
> Larry Witherspoon
> Torrance (Los Angeles)
> 562-982-7720
> ssspoon@a...
>
>
>
>
>
> Larry Witherspoon
> 4260 W 182nd St.
> Torrance (Los Angeles), CA 90504
> day/office phone 562-982-7720
> larry.d.witherspoon@b...
> ssspoon@a...
------------------------ ---------------------~-->
Buy Stock for $4
and no minimums.
FREE Money 2002.
http://us.click.yahoo.com/orkH0C/n97DAA ... /XoTolB/TM
---------------------------------------------------------------------~->
To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com
WHY???
The only advantage i have heard is better flow rates, which could be
done alot cheaper to the EJ22 heads!
If you want to change heads, why not go the whole hog and bolt on the
quad cam heads. (they bolt straight on) Sure it will require an
aftermarket ecu or a chip, but it would give much greater potential
and gains!
Sorry if these seems a little hostile, have been studying all day and
hav a headache, and have always wondered what the attraction of the
heads is..?
George, Australia.
--- In BC-BFLegacyWorks@y..., ssspoon@a... wrote:
> Josh Colombo" <josh@s...> writes,
> asking of 2.5 RS cylinder heads
>
> Larry.....do you think these heads would fit on a 2.2 N/A engine
without the
> issues you've run across for the 2.2 turbo...
>
> Hi Josh,
>
> First time I have considered that question.
>
> The BIG problems for me were turbo oil and turbo water related
deficiencies.
>
> There were a few other design variances between the 2.2T and the
2.5 N/A
> They may or may not be a problem with a 2.2 N/A to 2.5 N/A swap
>
>
> The 2.2T cylinder heads would require new cylinder head gaskets.
> The water ports have been repositioned to match the passages in the
cylinder
> block which is closed deck.
> The 2.2 NA and 2.5 N/A are both open deck so maybe that won't be a
problem
>
> Another domino effect may be different port to port distances or
manifold
> stud pattern, either one of which would necessitate a different
manifold,
> which is not too bad, but you might want to check to see if that
would mean a
> different throttle body. If the new throttle body means a
different ECU, and
> maybe a wiring harness modification, there you go.
>
> But those are way outside things that probably won't happen. It's
just that
> Murphy's law might kick in, so if you don't check, there might be
an
> incompatibility.
>
> If all the associated accessories bolt on, there's a another small
detail to
> consider.
>
> The 2.5 head has a bore of 99.5 millimeters, which is 2.6 mm larger
than the
> 96.9 mm 2.2 block bore. You'll have a 1.3 mm larger step all the
way around
> the 2.2 cylinder bore where it mates to the 2.5 head. IF the
piston doesn't
> come up far enough for it to be a problem with the rings, that
would have the
> effect of lowering your compression, which could be good, if you
plan to
> force induction. Otherwise the heads can be worked to give you any
> compression you want.
>
> After saying all that, since we know there are those who HAVE gone
the extra
> kilometer to make the 2.5 heads work on a 2.2T, it should be even
easier to
> adapt them to a 2.2 N/A. If Murphy would give us a break, maybe
they would
> really be truly a bolt on bonanza.
>
> So thank you Josh for giving me the intro I needed to run my ad
again.
>
>
> Complete left and right cylinder head assemblies from 2001 Imprezza
2.5 RS
> Phase II SOHC design, solid lifters, roller rockers
>
> Deburred, ported, polished, multi angle valve grind
> by Dan Paramore Racing (DPR)
> Gardena, CA
> 310-523-4074
> dan@d...
> http://www.dpr-racing.com
> Check DPR website for 2001 Land Speed Records
>
> Ceramic thermal barrier coated valves
> by Swain Technology
> Scottsville, New York
> 716-889-2786
> http://www.swaintech.com/
>
> $1800 outright or $1500 exchange
>
> I will pick up the cost of shipping in North America
> I will split the cost of shipping outside of North America
>
> Digital pix available on request - they look good
>
> The work done was calculated to be that which would result in the
greatest
> improvement to the stock condition. The cost of any additional
work, if
> desired, would still benefit from the savings realized on the work
done to
> this point, and by the fact that the heads are still disassembled
at DPR
> awaiting instructions.
>
> Larry Witherspoon
> Torrance (Los Angeles)
> 562-982-7720
> ssspoon@a...
>
>
>
>
>
> Larry Witherspoon
> 4260 W 182nd St.
> Torrance (Los Angeles), CA 90504
> day/office phone 562-982-7720
> larry.d.witherspoon@b...
> ssspoon@a...
------------------------ ---------------------~-->
Buy Stock for $4
and no minimums.
FREE Money 2002.
http://us.click.yahoo.com/orkH0C/n97DAA ... /XoTolB/TM
---------------------------------------------------------------------~->
To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com