jmartpr

Got it...but I was referring to people with other brands that in order to compare you need to have done all dyno tests using the same procedure. In my case I have dyno tests but were not done using DMS procedures so if I go back to test the car using these new procedures probably will get different results....hopefully better and more representative of what happens on the street or track.

Warwick Morris

Hey Kareem. You were going to test standard car, DMS and Cargraphic. Did you ever get results for the Cargraphic so we can see how they work against the DMS ones?

KareemGT4

Yes cargraphics + tune made less power than DMS headers alone. I dont have access to the dyno graph yet.

RealityGT

Graphs or it didn't happen.

KareemGT4

few people on the forums have seen the graphs and I have too... so whatever tickles your fantasies

RealityGT

I'm sorry.. But you were so verbose on "Putting it to bed".. Now you make outlandish claims without backing it up with actual data... and I'm in fantasy land?

I am skeptical that a proven design (cargraphic) header + tune, would make less power than just another set of headers.
Put the kool-aid down and lets get some real talk going here... this can only help the community, so it baffles me as to why the GT4 owners are so reluctant to seek the truth... Fanboi attitude won't help the platform grow.
-Food for thought.

KareemGT4

Awaiting the owner to post the graph, it's not mine.

I don't have the graph it was posted on the GT4 International whatsapp group, someone must have it.

edit: wanted to add that the dynos were not done same day too.

ShakeNBake

How are two different cars with two different headers dyno'd on two different days comparable?

bhk1004

I guess the original 3 way dyno never happened.

KareemGT4

no it was difficult, with our different work schedules and stuff..

but stock + bmc & bmc + dundons was done in the graphs I posted earlier.

CarAholic

As long as they were both done stock and post headers on same day I think it will be a good indication regarding the delta.

RealityGT

Goodness, surely you jest?..

Rick DeMan

Yes, Did this test yesterday. Stock GT4, dyno with factory cats, then up on lift install Porsche Motorsport "catless cats" and re-dyno

0, none, no gains..

Same as the cats.

stout

Rick, thanks for this data point. Interesting.

So, since there is little or no performance advantage to catalyst delete—in the test above, anyway—can you speak any durability advantage of no cats at most tracks? Is it different than, say, Daytona, Sebring, or Road Atlanta with those long straights?

Having been pegged as a "global warmist/tree hugger" (I am neither), I am curious, as I haven't heard of factory catalysts failing in track use...and certainly not in big numbers.

stout

I think the real question was whether everyone was wearing the same socks on both days, or at least the same color.

Sorry...I couldn't resist. Kareem: Thanks for posting your findings, and your car is plain gorgeous. Makes me rethink my choice of Guards Red.