2.5 head on my 2.2 motor

[bobjoe]

hey
i have to change the head out on my1988 daytona shelby z 2.2 turbo2 and i heard that you can change the original 2.2 head out for a 2.5
the 2.5head is supposed to breathe better than the 2.2, am i right?
i also heard that the only thing you have to keep an eye out for is that the 2.5 head i want to put in is a turbo, 4banger one
i have found one in good condition for $100 (good deal yeah or neh)
if i change it out will i have an increase in horsepower and fuel mileage
what would you do
thanx
BobJoe

[lametec]

2.2 (Swirl style, '86 up) and 2.5 heads are identical.

[bobjoe]

hey
so ur dayin it wont make anydifference on my 88
at all
BobJoe

the head from a 2.2 and 2.5 are all the same with minor changes...... just loo at your casting numbers and match them up....the most popular head on these motors is 4105782

Other STAMPS on the head to look for and the drivers side if the head are as follows

"TSCD" = Turbo "Crossed Drilled"
"TS'' = Turbo
"CD'' = Cross Drilled
and one to stay away from
"OSJ" = Over Sized
this was a bad batch of heads from dodge Using over sized cam bearing areas

if you have a cross drilled block try and go with a cross drilled head......if you cant find one its ok to run a non "CD" head

[Chris Faulk]

Quote:

Originally Posted by fwdmopar15401 the head from a 2.2 and 2.5 are all the same with minor changes...... just loo at your casting numbers and match them up....the most popular head on these motors is 4105782 Other STAMPS on the head to look for and the drivers side if the head are as follows "TSCD" = Turbo "Crossed Drilled" "TS'' = Turbo "CD'' = Cross Drilled and one to stay away from "OSJ" = Over Sized this was a bad batch of heads from dodge Using over sized cam bearing areas if you have a cross drilled block try and go with a cross drilled head......if you cant find one its ok to run a non "CD" head

TS stands for tapered shroud BTW.

[Chris Faulk]

Quote:

Originally Posted by bobjoe hey so ur dayin it wont make anydifference on my 88 at all BobJoe

The heads are not classified by 2.2 or 2.5, it's the block that's done that way.

There are 2 basic types of head. The swirl head, and the G head. The G head came in (2) part numbers... *287* and *445*. The swirl came in only (1) which is the *782*. SLIGHT changes can be found in each.

Here's a break-down of what and where they can be found.

1983-1984 2.2l
- Casting number 4105445

1985 2.2l
- Casting number 4323287

1986 2.2l fastburn
- Casting number 4105782

1986-1988 2.2 Turbo I
- Casting number 4105782

1986-1994 2.2 carb/TBI
- Casting number 4105445

1987-1990 2.2l Turbo II
- Casting number 4105782

1986-1994 2.5l TBI
- Casting number 4105782

1989-1992 2.5l Turbo
- Casting number 4105782

[Una]

The 287 G head was also used up to 1987 on L bodies..

[glhsken]

Not turbo L bodies... not sure on NA...

[Una]

Ahh yes, I should have been more clear on that. The carbureted L bodies up to 1987..

[bobjoe]

hey
thankx guys
you have no idea how much trouble u just saved me
BobJoe

[bobjoe]

hey
my dadsaid that on the 2.5 head the valves are different (just smidge bigger) or there is some other minor difference on them
is this correct
im gettin from you that there is no difference at all
the other question on is what is the an L body and that
whats m 1988 dodge daytona shelby z
thanx
BobJoe

[Chris Faulk]

Quote:

Originally Posted by bobjoe hey my dadsaid that on the 2.5 head the valves are different (just smidge bigger) or there is some other minor difference on them is this correct im gettin from you that there is no difference at all the other question on is what is the an L body and that whats m 1988 dodge daytona shelby z thanx BobJoe

Depending on whether or not you got the head from a turbo or non-turbo is the real difference. And that being the non-turbo head will have non-turbo valves, but are not a difference size.

An L-body is the body code for a Charger or Omni. G-body would be Daytona.

[turbovanman]

As Chris said but also valve springs are different. IF you get a TBI head, you need to swap the valves and springs. If you get a G head, the valve stems are a different length so you can't swap between a G head and swirl head. Phew, lol!

You will find the numbers, if your looking from the front of the car, at right front, It will say in big letters, by the thermostat area, 782 etc.

Also, cracking is common on these heads, so when buying one, check the chamber carefully for cracks spreading to the water jackets. There are normal cracks, which you ignore, there are between the valve seals and from the cross drilled holes to the big water jackets. $100 for a used head is good but make sure to have it checked by a machine shop before you put it on.

[Una]

On a side note, I scored a 287 casting (G head) from the local junkyard off an '85 turbo car.. And it's got a '90 casting date on it.. Very cool. It's getting ported and polished and bigger valves put in it for my 300hp beast.

[TurboChry]

"OSJ" = Over Size Journals on camshaft. Kind of limits replacement cam choices.
On a quick inspection of these heads I usually look in the exhaust ports to see if the guides are all where they should be.
I've also seen these heads crack from #3 exhaust lifter bore clear down to the spark plug hole.
Look for these things before the money changes hands, then go to the machine shop for pressure test and mill (or atleast check for flatness).
Jim