996TT engine into 996?

[SprintStar]

Hello all!

Would like to know what's involved to shoehorn in a 996TT engine into a '98 996 C2.

There's a 996TT wreck available and the engine's good. It starts and runs.

Is it possible? Both are Tips but I'd prefer to keep the C2 a C2. :-)

Thanks for any insight.

Sprint.

[Loren]

I think this will be very difficult.

MY98 C2 is a narrow body car and 996TT is a wide body car. I don't think there will be room for the intercoolers on a narrow body car without a lot of body work.

Not to mention brakes, larger radiators, DME, etc.

[Dharn55]

I know it has been done with a Boxster. But a C4s with the wider rear end would be easier.

Edited March 28, 2009 by Dharn55

[mobil1nsx]

I know it has been done with a Boxster. But a C4s with the wider rear end would be easier.

I always wondered if a 996TT engine can be installed in my 02 C4S 6 speed.

Does anyone know if the C4S manual tranny is the same as the TT since both are AWD? I would think among others items to address would be side venting for coolers, etc.

It seems an interesting option.

[Loren]

I know it has been done with a Boxster. But a C4s with the wider rear end would be easier.

I always wondered if a 996TT engine can be installed in my 02 C4S 6 speed.

Does anyone know if the C4S manual tranny is the same as the TT since both are AWD? I would think among others items to address would be side venting for coolers, etc.

It seems an interesting option.

Ratios would be close but I think the 996TT transmission is stronger as it is the same as the GT3.

You will still need to re-plumb the clutch and re-program the DME, add the oil tank, etc., etc.

Still a lot of work considering what 996TT's are going for these days.

[SprintStar]

I think this will be very difficult.

MY98 C2 is a narrow body car and 996TT is a wide body car. I don't think there will be room for the intercoolers on a narrow body car without a lot of body work.

Not to mention brakes, larger radiators, DME, etc.

I'm concerned about the mating about the engine to the tranny. I've heard on the 944 forums that the Boxster tranny has 3 bolts ok, 1 bolt off. By associative relationship, the Boxster engine is similar to the 996 engine, thereby having same mounting points to tranny but the TT engine is similar to GT3 engine which is 964-based (ok, the block is), then is there a mating issue?

As for DME, I suppose the whole harness has to go over? No chance of just pulling the TT DME and expect it to work with the 996 harness?

Thanks for the input!

Sprint.

[Loren]

I think this will be very difficult.

MY98 C2 is a narrow body car and 996TT is a wide body car. I don't think there will be room for the intercoolers on a narrow body car without a lot of body work.

Not to mention brakes, larger radiators, DME, etc.

I'm concerned about the mating about the engine to the tranny. I've heard on the 944 forums that the Boxster tranny has 3 bolts ok, 1 bolt off. By associative relationship, the Boxster engine is similar to the 996 engine, thereby having same mounting points to tranny but the TT engine is similar to GT3 engine which is 964-based (ok, the block is), then is there a mating issue?

As for DME, I suppose the whole harness has to go over? No chance of just pulling the TT DME and expect it to work with the 996 harness?

Thanks for the input!

Sprint.

If your car were a MY02 or newer you could re-use the DME as both are DME 7.8 - just different programs.

Problem is the older (Carrera's) cars DME's (DME 5.2.2 and DME 7.2) do not support VarioCam Plus.

[jgriffin56]

The Tiptronic transmission is completely different in the TT than in the 996. It is made much stronger than the Tip in the 996 to handle the horsepower, even has a different OEM part number. (see PCA Tech Forum q&a)

[Loren]

The Tiptronic transmission is completely different in the TT than in the 996. It is made much stronger than the Tip in the 996 to handle the horsepower, even has a different OEM part number. (see PCA Tech Forum q&a)

As of MY02 Carrera that is not true.

From the Model Year 2002 Technik New Model Information book...

"A power-shifted five-speed sports transmission is available as an alternative to the conventional six-speed manual transmission with mechanical disengaging clutch.

The transmission of the 911 turbo has been installed to withstand the torque and performance requirements. The basic transmission is manufactured by DaimlerChrysler under the internal type designation W5A 580."

[tholyoak]

The turbo uses the GT1 block, same as the GT3, a standard 996 trans will not bolt to the turbo case. Best solution would be to use a GT3 transmission for such a swap.

-Todd

[jgriffin56]

According to Joel Reisner, the PCA Tech expert for the 996 he states about which Tiptronic is installed in each, "The C4 uses the type A96.30, with a 996 part number, while the Turbo uses the A96.50, with a 722 part number, which is unusual". So there must exist at least 2 versions of the Tiptronic used in P cars.

[Richard Hamilton]

According to Joel Reisner, the PCA Tech expert for the 996 he states about which Tiptronic is installed in each, "The C4 uses the type A96.30, with a 996 part number, while the Turbo uses the A96.50, with a 722 part number, which is unusual". So there must exist at least 2 versions of the Tiptronic used in P cars.

In the 3.4 cars the Tiptronic transmissions were made by ZF, and in the 3.6 and TTs they were made by Mercedes Benz. Completely different. 722 is the Mercedes type number.