Techno Torque 2

[sb01box]

Originally Posted by Jaak

Since my motor is out being rebuilt, I have been looking at the parts discussed here and have a bit of time to investigate some "upgrades". I looked at the intake plenum I have, Part #996.110.055.00 and was wondering if one from a "newer" Boxster would be a direct replacement? Friend of mine has an Independant P-Car shop who can order parts for me at his price ....

I was wandering down the same road a while back. looking at the parts list, the 987 intake has vaccum/electronically controlled butterfly in the intake "T" that the ECU manipulates. as such I doubt that it is a direct drop in replacement.

On a side note, as for AOS, the 987 part can be fit into 986, replacing the plumbing from the AOS to the intake behind the throttle body (986 has one tubing, 987 has split two tubes) should suffice here.

I do not qualify even as a weekend mechanic, anyone having knowledge please chime in.

[Jaak]

The 02's seems to be controlled the same. The T is attached to the "butterfly" unit with a few longer bolts. Thought someone here may have some experiance on this.

[sb01box]

Originally Posted by Jaak

The 02's seems to be controlled the same. The T is attached to the "butterfly" unit with a few longer bolts. Thought someone here may have some experiance on this.

I had thought that up to 03, the intake "T" plumbing are the same and that after 987 series the intake "T" has the internal baffling/routing just behind the throttle body and the controlled butterfly at the "T". this is not the same as the throttle body butterfly.
picture shows the baffling/routing along with butterfly at the junction

[Jaak]

It's king of hard to compare both systems in any of the drawings I have seen. maybe someone who has worked on both can add to the discussion.

[sb01box]

Originally Posted by Jaak

It's king of hard to compare both systems in any of the drawings I have seen. maybe someone who has worked on both can add to the discussion.

picture below shows side by side of the intake plenum. the part that I was focusing in is the additional butterfly in the plenum in the "T".
it's opeation is controlled by electronics and vacuum. I don't think 986 ECU has this feature and therefore compatibility problem

[DaveinMD]

I got the unit installed in my MY03 base a few weeks ago. Did a bunch of timed runs in 4th gear from 2000 to 4000 RPM both before and after over the same road within about an hour of each other in the middle of a sunny day. The times averaged 3/4 of a second faster after the install. Haven't seen a downside to it yet - did a DE event on the 26th and really noticed the extra acceleration.

Now for the "seat of the pants" stuff: seems like the engine idles more smoothly, very low end torque seems better - less likely to stall from a standstill, maybe has a little bit more "growl" during acceleration (or maybe it's just the mind playing tricks).

[Bobiam]

Originally Posted by DaveinMD

I got the unit installed in my MY03 base a few weeks ago. Did a bunch of timed runs in 4th gear from 2000 to 4000 RPM both before and after over the same road within about an hour of each other in the middle of a sunny day. The times averaged 3/4 of a second faster after the install. Haven't seen a downside to it yet - did a DE event on the 26th and really noticed the extra acceleration.

Now for the "seat of the pants" stuff: seems like the engine idles more smoothly, very low end torque seems better - less likely to stall from a standstill, maybe has a little bit more "growl" during acceleration (or maybe it's just the mind playing tricks).

Good information, Dave! Do you know the length of the "run" or the speeds at start / finish for the distance?
How do you feel about price vs results?

Bob

[Jaak]

Originally Posted by sb01box

picture below shows side by side of the intake plenum. the part that I was focusing in is the additional butterfly in the plenum in the "T".
it's opeation is controlled by electronics and vacuum. I don't think 986 ECU has this feature and therefore compatibility problem

Thanks ... one can see that they are not compatible. Was hoping though ....