WhtRocket

Damn nice post man. Actual data and good analysis. I only with there was more this.

saxyman990

jkekeisen- yeah, I actually saw those dyno numbers posted in another thread, and I was checking them out a lot, considering I have very similar mods.

So, just to be clear, what we are looking at here is a few mods such as intake, and cb for the first run (the red line), and then you added a MP and DP before doing the second run (blue line)? Is that correct?

Assuming that I am reading it right, then I was a little confused by your results. Granted, these were not performed on a dynojet (right?) so the results are a little lower than they should be. But for your first run, you were only pushing out 210hp, and that was with a few mods. Shouldn't that be a little higher considering a stock FD should be around 220 rwhp? It almost seems like your torque and power are dropping off way too early. Is this due to the fact that it was run on a dyno dynamics machine? I've never ran on one of those, so I honestly am quite curious. Really interesting...

Also, that second run is quite interesting. I'm really suprized that there is no gain in the lower range. I mean, its increasing a lot in the upper range like it should with a midpipe, but I was under the impression that you should still see a bit of an increase in lower range power too.

I'll be doing a dyno run next week sometime, so I'll post my results and we can compare.

SilverRX7

What about carsound cats?

jkekeisen

I think the baseline on a dyno dynamics for a 3rd gen is approx 195 rwhp. That is what I found from some australian sites, where they use primarily dyno dynamic dynos.

capt. bill1

I've said it before and I'll say it again, don't waste your money on a N-Tech cat. I had one and we measured 7 LB of back pressure with it in the exhaust system. Removed it and replaced it with a MP with a Borla muffler in it and the back pressure dropped to 2 LB.

Buying and installing something and then "feeling" a difference in how your car performs has no more validity than saying "my car feels faster and runs better after I change the oil". Hard numbers are the only things that count. Be they RWHP on a dyno, 0-60, 1/4 mile or psi.

Mazdabation

iTrader: (9)

So how does it compare in having a Borla in the mid-pipe to cat of some sort?
Is it better to use the Borla over a convereter?

capt. bill1

The N-Tech is the only high flow cat I have tested. And it wasn't high flow as far as I'm concerned and a total waste of money. The MP with the Borla flowed like a MP but with a more muted sound.

From what I have seen, if you want the flow of a MP with sound levels somewhere between a cat and a MP get the MP and put a straight through muffler in it. Or perhaps a resonated MP, which is pretty much the same thing.
There is some evidence that back pressure helps low end HP and TQ. If that is true and that is what you want, why waste money on a high flow cat that may very well not be high flow anyway. Just keep the stock one and replace it when it clogs up.

nocab72

I have a Bonez hi-flow cat I bought earlier this year I am wanting to sell. Used for 3 days < 100miles. Looks new, still shiney. Opt'd to go MP. PM me, make reasonable offer and it's yours.

K

KevinK2

That link is NOT what a mid pipe does. Wael had an ign miss from transition to about 6k rpm during the mid-pipe run. Note before transition, comparo shows no low end loss with mid-pipe, before transition. The hi-cat will NOT give better low end power vs mp.