Value of 2.7 ENGINE Coding?
 

Im wondering what a Long block 2.7 is going for these days.. Unknown history said to be running. Has Oil pressure line update, webers, 11 blade altenator,

How can I tell by the Engine # as to if it is an S engine or not..

I.E. 6 1 5 1111

6 = 6 cyl

the 1 would be a T motor and ANY other number between 2-5 in this spot would be an S?

5 = production Year.

go to the engine side if this board

There is an engine number on the block...near the oil sender and under the serial number, it's typically fainter than the serial number, it will say 911/??, then you look it up or ask again for the translation.

The motor is a 75' normal or T if you will. Technically they dropped the T designation in 74'. In 75' the motors were normal, S and Carrera. In the U.S. the S and Carrera were the same motor. The R.O.W. had a MFI Carrera motor that was the same motor as the 73'RS.

Motors for 75'
615xxxx = normal
635xxxx = R.O.W. S
645xxxx = U.S. S/Carrera
665xxxx = R.O.W. Carrera

Verified good running used 2.7s are about $2500 to $3500. A running motor with unknown history would be about $1500 to $2500. Cores range $500 to $1500.

Considering that the motor has Webers, 11-blade fan and oil-fed tensioners I'd put it in the $2000 range. Offer $1500 and in a worst case scenerio you can sell the parts for more than you have in it.

Whats ROW stand for? Are the HP's the same for the ROW, S , and Carrera? What would the differences be?

R.O.W.=Rest Of World.

Motors for 75'
615xxxx = normal 150HP
635xxxx = R.O.W. S 175HP
645xxxx = U.S. S/Carrera 165HP
665xxxx = R.O.W. Carrera 210HP

The 75' normal motor had the least HP but don't let that discourage you. It's actually faster than the U.S. Carrera or S away from the light. It has smaller ports so that gives it better low end torque in the lower RPM's. It looses out to the U.S. S/Carrera in the upper end torque range.

The U.S. S/Carrera has a higher top speed but the normal has faster acceleration from a stand still. The normal makes for a nice street motor.

The nicest motor of the bunch in my opinion would be the R.O.W. Carrera with the 210HP MFI motor. The MFI has better throttle response, due to it's independent throttle bodies, and it also has the most radical cam so it is capable of the most HP.

Now, what if its a 74 76 or 77 would all of the values listed on HP still be the same?

After looking it over I have a 646xxxx and a 911/82

This tells me that its a 76 US 911 S and that it would have 165 HP Is this correct?

How good are these engines in comparison to what I have in my car. Im running a recently rebuilt 2.4 T with hotter cams but Not E, Webers, and a little more compression. I would say my car has about 150 HP, but thats not been determined.

How bad can water damage the internals of an engine? When I looked down the carbs I saw water. What can be done to this type of 2.7?

Yes, 76 US 911S 165HP.

If you've got a nice rebuilt 2.4T with higher compression you'd probably better off just staying with what you've got.

The 2.7 motors from 75' thru 77' used a later style exhaust that had thermal reactors and a 5-blade fan. Both supposedly added to higher running temp which contributed to pulled head studs and a shorter life. I think a lot of the problems for the 75' to 77' 2.7 motors had just as much or more to do with the lack of a good front oil cooler though. Even though the 5-blade fan had less blades than an 11-blade the 5-blade turned at a faster ratio so it's probably a wash in terms of cooling. The 2.7 motors also used aluminum cylinders which expanded at a faster rate than the steel studs that bolted them to the case. This is a point of debate about the cause of pulled head studs.

When you couple the problems that plagued the 75-77' 2.7CIS motor, along with the water in the carbs you mentioned, this would scare me enough to stay away from this motor unless the condition can be verified prior to purchase. Rebuilding one of these motors is very expensive. About $10,000.

The 2.4T is usually a great base motor because they had an early exhaust, 11-blade fan, and smaller displacement so they ran cooler than the 75-77 2.7CIS motor and therefore have longer lives. The iron cylinders in the 2.4T also expanded at the same rate as the head studs that bolted them to the case so head stud pulling wasn't such an issue.

I wouldn't buy this 2.7 unless you just want to have fun taking it apart and inspecting it. Don't pay more than the $1300 you could sell the carbs and fan/alternator assembly for.