IPDs - do they work on N/A - let's find out

[996ttalot]

mrdemon said:

I'll dig it out for you, nothing to hide, the place where I had it dyno did not even know I had any thing done to the car, it's was a 3rd party test, with a week inbetween.

over 1000 Caymans Have the same mods with this sort of power, it's tried and tested.
My Spyder will get the same which will give it a better BHp/ton than your 996RS and with the engine in the right place, you will be free to look at it from behind on track :-)

We never had any doubt that they worked - had one on my turbo for 4 years I think. The main issues that we can see for not getting results is either poor fitment, poor MAF, or not allowing adaption to take place and any combination of those. We suspect that part of the reason that dyno does not always show results, is that you dyno base (3 or 4 runs), fit the IPD, then re dyno, and the engine gets hot in order to give enough time to adapt, and performance tails off.

Seems a good product, especially when added to other mods.

[996ttalot]

EvoSlayer said:

MadMark911 said:

You didn't go for the polished option then...





O/T, Keep up the good work Ken,...is yours back in one piece yet?

lol...I wish Andy....you would think owning an indy that you would get priority.

Body kit is finished
Wiper delete
All sound deadening removed
Cup rear screen - very light
Custom cage

To fit.
3.8 clubsport pistons and liners
Motorsport pump
Custom gaskets for high boost
Raceware studs
All pipework where possible welded instead of bonding
Completely custom fuel system - rated to 1200whp - so we never have to do it again, in case for some strange reason I want more power
Custom (and I mean custom ) garrett turbos which have been flow tested to 600hp each @ 1.7 bar and can be run at 2 bar.
Custom headers with external WGs (48mm) with screamer pipes
Custom exhaust with true 3 inch all the way through
Full RSS Tarmac Series
PSS10
.....cannot remember the rest but plenty more.

Still got to sort out wheels and rubber, had a few offers on that so will have to think , and will probably have to get some custom work done on the screamer pipes to feed into the exhaust for track days...might be a tad loud otherwise.

Cannot wait to drive it as you can imagine.

And of course it already has an IPD...lol

Ken

[996ttalot]

disco1 said:

MadMark911 said:

It might not produce huge power gains at the top end

But that is the issue here, the IPD sets its stall out on the fact it brings an extra 25BHP and 22 torques but it doesn't deliver on either, I wouldn't be happy after forking out £600+fitting for something that doesnt work as described on the tin. If you ordered a 50" TV and got a 32" surely you would be mega miffed and send it straight back?

And there in lies the issue with dynos.

IPD got those increases on their dyno with other 200 independent persons present on 5 different cars. But that dyno is different to the one that we tested on, correction factors and so on. They didn't make up the dyno charts you know.

So they are not advertising incorrect information - it was their testing, their results.

You have to get past this headline bhp figure of 4hp. Remember that 996 only made 309hp after many runs as a baseline. It should have made 320hp. Anything such as plugs for example can affect the output. The MAF was fine.

Looking at the 3.6 dyno, the mid range increase of 10hp/13nm tq on a car that was not performing to specification is a big increase, and bear in mind that on that test, we had to stop the dyno because the car was starting to heat soak. Maybe running it today would produce a better figure...I suspect it would.

Regardless, the point should not be peak hp. I don't want to bore you with calculations of area under the curve power, which essentially can derive from two separate dyno charts which car has better performance, but
the car is quicker and those are the facts.

On the 3.8 c2s (Mark's car) we gained nearly 10% more air flow at midrange on a car that makes 355hp. Even if it was making say 250hp at 4000 rpm, that is 20hp approx. And Mark has just stated today from Wednesday session that it has adjusted again - which we will rerun the MAF test when his car is back in a few weeks.

On a turbo car, the gains are considerable because the increase in airflow is more significant.

The bottom line is that both cars have a good mid range increase in tq. Remember these are std IPDs, which are designed to provide mid range, not top end.

The fact is that they work. I don't think anyone can dispute that. After all that was the purpose of the exercise.

Is there another product that gives this performance on n/a pound for pound?

Ken

[996ttalot]

It is not difficult to fit on some models, but some is nearly 4 hours (996 turbo for instance).

I would suggest those that are interested wait a little while for something to happen with pricing.