tconn

Will the 2.7L head work on a 2.5L with out alot of modification to it?

Mike Lindsey

You need to modify the water passage or block for the same reasons putting a 951 head on a 104mm block. All else is bolt up.

tconn

Thanks Mike , I thought that might be the case.
Is this an expensive process?

95ONE

Check out his web site!

Mike Lindsey

I don't think it would be any more difficult or expensive then going the other way.

TonyG

Why would you want to use a 2.7 head on a 2.5?

Makes no sense.

The ports are different, the combustion chamber is probably larger (due to the larger bore), and the water jacket is different. Plus the 2.7L head is worth good money to someone using a 3.0L block.

TonyG

special tool

I can't find a reason for it either.

Tom M'Guinn

The 2.7 head sells for over a $1000 as a core (at least before the finacial crash) so it would make more sense to use a 951 head (at about a tenth of the cost) which bolts up without modifications -- unless you had big exhaust porting plans. If you modified a 2.7 head to fit the 2.5 block, you would be paying a few hundread dollars to devalue the head by about $1000.

onefastviking

No kidding !
I didn't know that, I have a good complete 2.7 engine that I have been wondering what I should do with.

knfeparty

Mine is off at the machine shop and they haven't called me...they probably destroyed it. So I might need one. That stuff about them being worth something? Lies. I'll give you 5 bucks.

tconn

I was thinking of the bigger intake and ability to port it.
If I decide to cancel the 3.0L build, I'll probably rebuild my 2.5L and mod it.

At this point no-one seems interested in the parts I have
for the 3.0L so I might just keep it and build it as the funds allow.

333pg333

Keep your 3L parts and slowly build that up. You won't regret the extra capacity.

tconn

Yes I'm starting to think this will be the best way to go.
I won't have to go crazy with it to get good power from it.

RolexNJ

That's definately something to consider Tim. And as several people said the 2.7L head is a very rare commodity in this market.

tconn

Hey Rob

I agree they are rare but in this economy you can't get
the money for it you could just a few months ago. This is why I'll probably keep the parts.