911 2.4 to 2.5 question (again)
 

Hello,

One year and engine rebuild is almost ready.

Almost every parts has been replaced, list is endless.
Engine originally 2.4 T (MFI) 1973

I am tuning my motor :
PISTON: 86mm FORGED JE PISTON
CYLINDERS*: ALUMINUM*BIRAL*
PISTON RING: HIGH PERFORMANCE RINGS: Top*1.5mm**2nd: 1.5mm Oil: 4mm
COMPRESSION HEIGHT: 33.91mm (1.335")
Compression ratio is >9.5
Gasoline used 98 oct
E-Camshafts
Ported Heads (measured to +300 HP)

Could anyone estimate torgue and horsepower.?

Thanks advance wtch

i have also extra oil cooler front.

My mecanic says that estimate of HP's is something about 160 Hp. If i could find better cams ..i could get some extra more HP

Any one has experience about those aa cylinders, JE pistons are ok?

Hi, are you running the original "T" MFI ? The "E" throttle bodies are bigger than the "T" as well as the stacks.

Steve

73 911 T MFI Coupe, Aubergine

original MFI
 

Its Original T-MFI.

MFI has been checked, but throttle bodies are original ones.

Hi wtch, I built a similar engine, 85's, J&E's, E cams. However, I had the MFI pump re-worked to E spec by Gus at pacific injection and I had the T throttle bodies rebuilt and enlarged to E as well. I also replaced the plastic T stacks with E stacks.
I don't know what kinda HP I'm making but I'd guess 325 ( kidding ). Still, it's is a very fun engine combo.

Currently building a 3.2SS engine based on a 78 3.0

Steve

73 911 T MFI Coupe, Aubergine

Hi wtch, I built a similar engine, 85's, J&E's, E cams. However, I had the MFI pump re-worked to E spec by Gus at pacific injection and I had the T throttle bodies rebuilt and enlarged to E as well. I also replaced the plastic T stacks with E stacks.
I don't know what kinda HP I'm making but I'd guess 325 ( kidding ). Still, it's is a very fun engine combo.

Currently building a 3.2SS engine based on a 78 3.0

Steve

73 911 T MFI Coupe, Aubergine

Thanks Steve,

Maybe i need also find those stacks and throttles.

How about that kind of camshaft is it too tight?

Nockenwellen für Porsche 911 RSR ähnlich, Satz für einen Motor = 2 Stück | eBay

I am trying to get funny motor and few hp more

I have all original parts still.

Good luck to your new project.

wtch, I'm no professional Porsche engine builder so I really can't suggest what cams to use. You can send your T throttle bodies to Matt Blast at Eurometrix ( Boston area ) and he'll re-build them to E spec. You can also send him your T stacks and get them enlarged ( I think you can ). Then you might as well get the pump done too.....the whole pkg.

Steve

73 911 T MFI Coupe, Aubergine

does anyone knows if i need twinplug?
I dont know exact cr?
We are using in Finland 98 to 100 oct gasolin (newer cars are using 95 oct mostly)

Where i could find those ge40 cams?