I'm just following the data.

In September, he finished off his NT05 Tires (Street Tires, not DRs).

Early November, he has a set of ContiExtreme Contact 3 Tires and cuts a 1.9 60', 12.29 @ 114.9 MPH with them. (Also Street Tires.)

Mid November, in this thread, his Street Tires (assuming still ContiExtreme) are now worn down but he cuts a 1.9 60', 12.10 @ 117.5 MPH with the exhaust work.

I'm just looking for the raw data to help quantify the gains.

 

I didn't realize the NT05's were street tires. So, yeah, my prior post is a mistake.

 

Let me put on my hater blockers on for a minute... Why are hating? What is your Deal? Is it cause your a vendor over charging? I'm just posting information from my results.... I actually am going to the Dyno this weekend...so you will see the results... did you find that post yet?

You are indirectly questioning my results...or in layman's terms you are trying to call me a liar... Like I said... I got my Hater Blockers on!!

And if you read my thread from sept about the tires you'll see I went to the 555... By the way I was running the NT-05's, then the 555's but for a short time due to the fact that they were not able to be balanced. So they were deemed defected...

Bottom line the RAW DATA WILL BE MY DYNO SHEETS... and my @ss dyno.... which feel's great!

 

They are as close as drag radials as you can get.. they have a 200 treadwear rating... They were extremely sticky, but real loud....

 

Wow, you totally read my post wrong.

Nobody is attacking you or calling you anything. That's certainly not my style.

I'm a data-junkie. I'm asking for the correct before/after data from your experience so I can add it to my knowledge base.

You posted a slower time as your "before" in this thread. I recalled when you posted a faster time as your "before" in another. I was asking for clarity on why. My question is still unanswered.

What was your best 60'/ET/MPH before the new exhaust work and what was your best 60'/ET/MPH after?

Thank you.

 

If you consider NT05's street tires then you should consider the Toyo R888's, Advan A048, and Michellin Sport Cups street tires too.

 

You don't need those Blockers so take them off. If you have followed any of Super's info post(s), you will realize that everything he does is cohesive. Post those dynos ASAP as some of us a very curious on how a DP w/X performs.

EDIT-I just noticed that Super is a MOD now. When did that happen?

 

Thanks, I didn't know that.

 

I am going to the Dyno on Friday... I will post results as stated in the OP...

 

The best comparison I have record of with time slips on street tires is what I originally posted....

 

300 cell metal core high flow cats will work great as primary cats (100s will most likely throw CEL). Cell count & location both play a factor when it comes to making more power (obviously lower cell cats make more power). However, moving the primaries further back will also gain power by increasing the pre-cat air volume allowing for improved gas velocity & scavenging effects. The only major downside to moving primaries further back is you usually have to get O2 extenders (not a huge deal as long as they are plug & plan and not spliced or etc). This is often done on European vs. US spec versions cars. Many of the Euro AMGs do not have the primary cats, therefore making the secondaries act as both primary & secondary cats combined into one (which are obviously much further down the exhaust system). This is also true on bmws and many other european cars as well (often explaining why euro cars have a bit more power even after factoring out the different power ratings of course). Its much easier to upgrade euro cats and the power gains are the highest in this setup, but you can get pretty close on a US spec car.

The difference in power gains between 300-cell and no cats at all (for example: when used as secondaries on the 55s) was only about 2HP & 6tq (100-200 cells are about half that at 1HP, 3tq). Primaries should be roughly the same if not less when comparing high flows & no cats. These high flow cats have come a long way over the years and you don't really need to go catless to get great power gains. In addition, high flows tend to smoothen & clean up the exhaust note quite a bit, where as open straight pipes can get downright unrefined & borderline obnoxious (a subjective statement I will admit).

hope that helps

 

Great idea. Not sure how the jig works, and will await your dyno, but could this guy also make them in 2.75 or 3 inch just as easily?

 

Thanks for the great info. You talked about using O2 extenders. What happens if you buy an off the shelf DP that has the O2 bungs in the stock location and then add cats further down the tract (after the bend)?

 

Not sure of the technical ins-and-outs, but I would think that since the cat uses heat from the engine to burn excess fuel, putting it futher down the system would make it cooler and therefore less effective. If true, the problem would get compounded with a lower cell cat.

 

Are you guys removing the secondary cats or the primary? Just curious.