strandolph

I'm looking for a list of differences between the late (88) 2.5L and the 1989 2.7L NA engine for a race car project. I did some searching and can't seem to find a similar thread, though I can't imagine it hasn't been summarized somewhere. I could just comb the PET, but I figured I'd ask around first. At least these things, I think:

1. Intake manifold (larger passages)
2. Head
3. Valves
4. Cam
5. Pistons
6. DME?
7. Chip

Steve

V2Rocket

different block, different head, different valves, different pistons...same crank as 2.5L...

strandolph

Different injectors?

strandolph

Going through the PET and figured I'd document it here for future reference...

What I'm interested in are material differences between MY88 (M.09) and MY89 (M.11) engines. I've found these part number differences:

Short Block
Piston
Rings
Head
Intake Valve
Exhaust Valve
Camshaft
Balance Shaft
Water Pump
FPR
FP Damper
Fuel Injector
DME

Are the fuel pressure regulator and Water Pump differences material? How about the FP damper and balance shaft?


I don't know how to embed an HTML table, so if you're interested, here's the list with part numbers. If you copy, and paste, you can reformat it in Excel or something.

Part M44.09 (88 Manual) M44.11 (89 Manual)
Short Block 944 100 902 04 944 100 902 05
Piston 944 103 088 62 944 103 099 10
Rings 944 103 902 92 944 103 902 25
Head 944 104 033 08 944 104 040 02
Intake Valve 928 105 409 02 944 105 409 03
Exhaust Valve 928 105 410 04 944 105 418 00
Camshaft 944 105 155 09 944 105 155 10
Balance Shaft 944 102 923 00 944 102 023 01
Water Pump 944 106 021 22 944 106 021 24
FPR 944 110 198 03 944 110 198 04/06
FP Damper 944 110 201 03 944 110 201 04
Fuel Injector 930 606 120 00 944 606 114 00
DME 944 618 121 05 944 618 121 06

joonas

Can you tell us why you want 2.7 l engine?
Do you think that it gives you more power, is more reliable or what?
Do you have some kind of class rules that might restrict 2.7 l use?

xsboost90

Steve owns my old 89 n/a which had a 2.7 motor in it. Steve that crank is from a 924s, which is cross drilled and polished- the replacement after i spun a rod bearing. IIRC the water pump actually has 2.7 stamped into it as the impeller is different or something. I think that motor would be great with a fresh set of rings because it would injest some oil on the track, but not really on the street.

Olli Snellman

It's easier to say what parts are the same as 2.5L version have. I suppose crank & rods are those parts.

strandolph

The long story is... After I bought Dan's car to drive on the street, I replaced the torque tube and put in an early trans (for the fuel-efficient 5th gear). At the same time, the engine appeared to need rings so I figured I'd go ahead and pull it. Right about that time, MPD47 was selling a freshened Euro 2.5, so I put that in the street car instead. Then I traded the 2.7 that I took out plus some $$ for a race-prepped 2.7 long block. A weight drop for 2.7 engines might make them really competitive in the 944 Cup series this year, so I'm going to give that a shot. I removed the 2.5 from my race car and am working on getting the 2.7 installed. I want to make sure that I replace all of the 2.5 parts. So, I've got a 2.7 intake, a 2.7 FPR, 2.7 injectors, and a 2.7 DME. Other than the long block, I think that's all I need.

Steve

xsboost90

so hows the old red car doin?

strandolph

It's doing great. The engine that I put in it is leaking at the rear seal, so it's gonna have to come out again, but it's serving its purpose... I drive it to work on nice days and borrow parts off of it in race car emergencies. One of these days, I'm going to get around to putting a spare Vitesse MAF I have on it and see what I might be able to tune a Euro engine to.

Steve

Steve Hickey

I have an in the crate 2.7 I in the crate. Newly rebuilt bottom end, stock, with new parts, oil pan removed and inspected by Lindsey Racing with Lindsey rebuilt Head with web cam Installed.

Planning on putting it in a decent '87 924s Street car but don't have anything else for the 2.7 and wife has cancer so... I might sell everything, or trade for a 2.5 I could put right in, I'd love to just find parts fairly cheap and maybe some help and finish it. I also have the original 2.5 with cracked block