Who belives in the IPD plenum - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Robert986 · 06-10-2021, 01:55 AM

Quote:

Originally Posted by ike84

Thanks for the info Robert! I'm glad youre back to driving, it's definitely hard to watch sunny days go by without letting the top down.

The MAF table is definitely the first step, followed by smoothing out idle and then building from there. If this guy really built a MAF table from scratch I would love to talk him!

Anyway, I'm happy you're driving again! Have at it brother!

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@Ike, I sent you a PM with my tuners contact info, good luck!

I can confirm that the car goes really well, a bit smelly without the cats though, will need to address that.. Also for environmental reasons it doesn´t feel totally ok without.

ike84 · 06-10-2021, 04:33 AM

Quote:

Originally Posted by Robert986

@Ike, I sent you a PM with my tuners contact info, good luck!

I can confirm that the car goes really well, a bit smelly without the cats though, will need to address that.. Also for environmental reasons it doesn´t feel totally ok without.

I had the same problem - without cats it stunk. And without some kind of muffler it was deafening. I can send you links to what I put on mine if you want. They worked well.

One thing that is for sure though - make sure your exhaust tips terminate behind the bumper. Ever notice on old cars (pre cat era) those things stick out the back like 6 inches? This is why! (Learned that the hard way).

Also, VERY IMPORTANT - if you're working on the car, run a fan under the vehicle briefly before getting under there. The rear bumper acts as a bonnet and traps carbon monoxide since it's lighter than ambient air. I actually got CO poisoning because of this. It was not pleasant.

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Robert986 · 06-21-2021, 12:08 PM

Well boys, now I know..

As stated before I had no chance to get a dyno reading. However last weekend I did my first track event with the newly mapped engine (And my new Hartech race sump, can tell all about that later)

I can confirm that for the first time I was totally even with the 996/997 carreras on the main straight. I also shared car with my father who ran in another class, he noted that the car defenitely had more power than at previous events.

How much extra? Wish I knew, but it´s significant.