The best performance modification that I have made to my Boxster-S to date!

Great info. How much did the kit cost? How long did it take to install?

[jmatta]

Very interesting write-up. Seems providing more air could be a good thing, as long as the ECU knows what to do with it and you have an exhaust that lets the air flow through the system.

Any experts out there that wish to comment? Has Jake Raby tried the larger plenum on his engines?

[Topless]

Originally Posted by jmatta

Very interesting write-up. Seems providing more air could be a good thing, as long as the ECU knows what to do with it and you have an exhaust that lets the air flow through the system.

Any experts out there that wish to comment? Has Jake Raby tried the larger plenum on his engines?

Good points jmatta,

I am certainly no expert. Just an old hot-rodder who has tuned a lot of cars and bikes. In my experience tuning an intake is a balance between air volume, air velocity, and intake resonant frequency. If you get these things right you are rewarded with faster lap times.

Also you need to consider your goals. A 1/4 mile car may want to maximize hp near redline to improve top speed through the trap. A road race car may choose to maximize a wide torque curve for better corner exit speed. These two intakes would probably look very different. Bigger isn't always better depending on your end goals.

The IPD plenum and the Pedro Techno-torque are interesting because they appear to improve intake velocity. Any time you can reduce or eliminate flat surfaces or right angles tends to improve velocity. The proof is found in measurable results. Improved dyno curves are good, faster lap times are better.

Would I use one on my car ? Nope. I compete in a spec class which requires stock intakes. But I do find these designs interesting.

[kias@tampabay.rr.com]

The stock ECU will adjust for the changes within the first 50 miles or so. No need to remap the ECU for this modification.

[kias@tampabay.rr.com]

If you guys interested, just eMail: sales@roadsportsupply.com

He has 2.7L and 3.2L kits for Boxster.

[JFP in PA]

Strange how the exact same post (verbatim) appears on several websites on the same day..........

Under different names, but same post with the same pictures..............all promoting the same product...................and suggesting you contact the same email address for more info…………..and yet forgets to mention this plenum costs $900………….

[kias@tampabay.rr.com]

Originally Posted by JFP in PA

Strange how the exact same post (verbatim) appears on several websites on the same day..........

Under different names, but same post with the same pictures..............all promoting the same product...................and suggesting you contact the same email address for more info…………..and yet forgets to mention this plenum costs $900………….

I have posted the same exact information on the websites that I am a member. Why do I need to mention price (is that you requirement?), if you need to buy it do it. I am not on commissions on this nor do I want to be a sales person for this product. Just try to share my exprience with this product, I like to know the same thing if some one else had the same experience. If I known about some of the other products that I have purchased with feedback, I could have saved some money.

[Topless]

Originally Posted by JFP in PA

Strange how the exact same post (verbatim) appears on several websites on the same day..........

Under different names, but same post with the same pictures..............all promoting the same product...................and suggesting you contact the same email address for more info…………..and yet forgets to mention this plenum costs $900………….

Spamorama!
Good eye JFP

[mebiuspower]

Check their dyno vid...

http://www.youtube.com/watch?v=vFmLlwKD69w

[JFP in PA]

Originally Posted by mebiuspower

Check their dyno vid...

http://www.youtube.com/watch?v=vFmLlwKD69w

Does not “prove” anything; made by the manufacturer/distributor and makes claims for 20+ HP increase at the rear wheels. Another dyno test, done by a magazine (assumed to be independent) finds less than half the power increase claimed by the manufacturer/distributor, sees most of it at the extreme RPM’s, and only in combination with multiple other modifications.

With minimal HP or torque improvements, if any, within normal driving RPM, and at a cost of somewhere between $70-140 per gained HP; you are paying a lot for small performance increases in engine speed ranges your car will see less than 1-2% of the time.

Very questionable…………………

[gschotland]

It is AMAZING how much of a difference there is between the RSS graph touted on 6speedonline and the one in the magazine test link I posted. Not that the magazine doesn't have an axe to grind, but their results seem obviously cleaner, more objective and more believable.

I don't know about you guys, but $250 for Pedro's mod is fun money territory, something I might try because it's not a huge investment. If it didn't totally meet my expectations, I probably wouldn't bother swapping it back out for stock.

My standards for a $1,000 "investment" are completely different. Plenty of newer owners on here that have paid $10-$20k for their cars, me being one of them. In light of what I spent buying the car, $1k is an awful lot for little real world gain. The best "mod" for me would be to spend the money improving my skills at 3-4 DE events, which is my plan come spring.

Another thing to consider is mods add very little to resale value and may in some cases actually hurt it versus a stock car. You'd better be able to derive full value from that mod yourself because it's most likely all money out the window. I've done the performance mod thing on a couple of previous cars and learned my lesson.

Only when a stock part wears out prematurely or doesn't provide the kind of longevity I expect (i.e. certain suspension parts) will I consider a mod replacement and there's only a certain premium I'm willing to pay.