here's the data from the DEVEK dyno day from a couple of weeks back. sorry, no baseline data, just the data collected after all the mods have been installed.

just wanted to give props to anders and marc of DEVEK. after the first disappointing dynopack runs they set me up with a dynojet run at a different tuner shop then back at DEVEK (all on their dime!) to see what numbers we would come up with. well, to sum it all up the dynapack and DEVEK's setup is as accurate as the dynojet.

there's some good news and bad news.

BAD NEWS

the graph shows the disappointing numbers. ~243 RWHP ~291.6 BHP. UGGH! worse than factory numbers. the run was performed with the lid closed.


GOOD NEWS

after the initial disappointment, anders and marc set me up on a dynojet to compare and contrast, again on their dime. sorry, no charts figures for that run but peak HP turned out to be 277 RWHP ~333.7 BHP. woo hoo! that's more like it!!!
we went back to devek and tested out the dynapack. after numerous runs we came up with similar figures from the dynojet, 267 RWHP ~ 277 RWHP (321.7BHP~333.7 BHP)



BAD NEWS II

so what went wrong? why the low numbers with the first run? back again at devek, we were scratching our heads and tried to figure out where we had gone wrong. was it the dyno or the setup? i mentioned some thing about an open lidearlier. well it runs out that the secondary runs, including the dynojet runs, were all performed with an open lid. nothing wrong with that right. dyno runs are almost always performed with the engine lids open. this made a huge difference!!!. we did some final runs with the lid closed and we came up with the same low numbers from the first dyno run, 243 RWHP!!!

CONCLUSION. the v-flow intake is being choked of air! with the lid open, the intake was not sealed at the top therefore had much more volume of air making more horses, 25RWHP actually. with the lid closed the v-flow was only allowed the same amount of air as the stock airbox would receive.

GOOD NEWS II

there is POTENTIAL for the v-flow to make more horses. since the v-flow intake has in intake plenum similar to oem and draws air out from the same opening i do not think that the v-flow is any worse than oem. in fact it still may be better! it has a freer flowing cone filter so that has to count for something.

FOR THE VERY CLOSE FUTURE
1. i will be setting up more dyno runs next week (hopefully) to get a baseline for oem intake and oem ecu programming. i will then do dyno runs for just the flash and just the intake and finally doing a run with both the intake and flash. there still may be a performance gain between oem and giac/v-flow.
2. knowing the potential being 277RWHP with a free breathing v-flow, i will drill out, YES, drill out the front side of the v-flow to see if it helps (front side so less of the hot engine bay air is drawn)
3. i will be getting a gt3 fiber glass decklid so i can cut a large hole exactly where the cone filter is to aid in breathing (i won't be cutting straight thru the decklid to the outside, HA!). the gt3 decklid has a larger intake cavity so i think this would workwell. might even have a ram air effect. we did another dyno run with a blower pointing straight at the the cone filter and this gave us 3~4 more RWHP! i wanted to get a new wing/decklid anyway so this REALLY gives me an excuse

STAY TUNED

 

i want a new decklid to in order to replace my carrera wing. If I can get an increase in RWHP then I can REALLY justify this mod!

Thanks Karlooz!!!

 

ya, but it's gonna be real expensive for an extra 25 horses . if you want a new wing/decklid anyway then it makes more sense.

 

You want a rear deck lid like the 993 TT or like KVP. That lid seems to have much more room and I would hope better breathing.
Interesting run and I would wonder what the evo site dyno runs show? Open or closed lid?

 

good idea. the gt3 decklid doesn't have the huge volume as kpv's decklid but it will allow me to funnel more cold air into the cone filter. not sure how a 993TT or kpv's decklid would look on a narrow bodies 996.

ya i was thinking the same thing. hopefully evo will see this thread and chime in

 

I have seen a bigger lid on renntech or somewhere, but cost is a factor.

This would do it right and looks hot, IMO
http://www.gemballausa.com/996coupe_aero.asp

 

I wish I would have seen it before I put the carrera wing on.

 

looks like nrauto has their own version, minus the rear vent.

 

Yep,
That does kinda, and I am sure it is cheaper. I would hate to know what gemballa gets.
Anyway just add 8K and get a super charger.

 

karlooz, looks like you didn't hit your 280 RWHP target (per our thread from a month ago). Averaging out your dyno runs of ~267-277 give us 272 RWHP. But since you have to do it with the decklid open, and there's such a huge difference with it closed, there's no way to know what you're actually getting on the street.

BTW, It sounds like it's pretty darn close to my estimate of max gain of 20-25 HP.

 

i was optimistically hoping for 280 but not really expecting it. it said 277 on the dynojet and 277 on the dynapack so i'm sticking to 277 . 333.73 BHP is pretty healthy increase IMHO but don't ask me about the price /performance ratio :O. hey what's worth it to me may not, and obviously is not, worth it to you. i am posting only for your benefit anyway :O just kidding.

gonna make some mods to the mods to make it work with the deck lid closed so stay tuned...

BTW, i put the stock airbox back and what a difference! it felt like it was being choked even more!!! i will be confirming with yet another dyno run.

still want to hear what todd/EVO says about all this.