RV6 2012+ Civic Si Bellmouth Downpipe

It would be a 3 years at least before I went s/c or turbo. Maybe this rv6 combo would make more sense with the full race exhaust then, instead of the full race down pipe If I want n/a performance. What do you guys think?
Prob do a skunk2 manifold too if one comes out..
 
The difference between a 3" and 2.5" n/a is about 5 HP. If you wanna go f/I you will need 3"
 
Good to know! Did you have to use a flange or additional piece? I figure a proper tune could make a difference, if I go with a 3" dp. Hmmm...what to do..what to do.
 
No extra parts needed. Full race said I would have to order a 2.5 inch adapter but that's not the case. A big noticeable difference in torque and power as soon as I drove it. Vit has been in the process of tuning my car so when he is finished I plan on getting it on the dyno. Ill will post the results to my build thread, where you can see all of the stuff I have done.
 
RV6 said:
To be cleared we used a Dyno Dynamics AKA a heatbreaker dyno. On our baseline we only made 152WHP, while the Dynojet made 172.5WHP that's a difference of 12.63%

On a Dynojet I would expect our numbers to be closer to.

13.3 * 1.1263 = 14.98WHP (Dynojet Corrected)
11.5 * 1.1263 = 12.93WHP (Dynojet Corrected)

Without FI or heavily built motor a 3" exhaust will most likely hurt you on low and mid range powder. 3 inch exhausts are great for paper racing but I will take low end power any day.

civicHPTQfinal.jpg
Click to expand...


How much difference in the catless and the high cell cat of ur guys, in power and its 2.5in right
 
I don't think anyone would know...unless rv6 did a dyno on each setup.
 
I kind of want to guess 5hp less then their catless but it still leaves higher then s2 3in alpha
 
I had the catless rv 6 and loved it. It would occasionally throw a cel, then it would go away, then come back.
 
For those asking,and for xXBob RossXx who seemed to think my post about the difference between the catted and catless version was funny,here's a quote from RV6 after being asked in the other forum

"I would estimate the catted version having 1-3WHP less since due to the minor restriction. We are using a 200 cell race cat which is just enough to keep things tame. A major portion of the gains come from replacing the highly restrictive stampings of the precat with a smooth casting and tube. If you look closely at the OE precat you can see the inlet of the precat doesn't even line up."
 
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