Berk Technology HFCs gain +19whp + 18wtq!
 

So I am very impressed by the Berk Technology High Flow Cats!

Baseline Dyno:
http://www.doubledownmotorsports.com...elinedyno2.jpg

Dyno After Berk High Flow Cats:
http://www.doubledownmotorsports.com...ynoberkhfc.jpg

This was done on the same DynoJet, same tank of 91 octane gas, and the only thing changed on the car was the Berk Technology High Flow Cats.

Dyno Video:
http://www.youtube.com/watch?v=ic7VsRv8vug

Nice Numbers for HFC's!!

wow is this your car? any audio?

Yes it is. Dyno vid coming soon. :)

There is a regular sound clip here...
YouTube - Project 370Z Sound Clip - Berk Technology High Flow Cats

HOLY CRAP! That's almost as good as the other thread with test pipes and Cat-back. I'm in.

Wow, that is very impressive. As said above, 2 other companies have only gotten ~10hp with test pipes, and these are HFCs. How can they be doubling what others are getting. These are almost as good as GTMs exhaust and test pipes combined. Is this dyno only with the HFCs, and no exhaust?

100% stock powertrain with the exception of the HFCs.

EDIT: First post updated with dyno video. :)

Wow great numbers, almost too good to be true there, especially on stock catback as well.

Oh how's the fitment btw?

I know, I am kinda shocked too. When I did my first baseline dyno, the numbers were a little higher, but it was a quesionable read as you can see...

http://www.doubledownmotorsports.com...edynochart.jpg

If you went off those baseline numbers, then the gains are 14whp and 8wtq. I just went with the cleaner baseline dyno which reads a little lower.

Fitment is A+

Great work with the high flow cats. What are your projections in combination with cat back exhaust? It would seem that 25-35 WHP and the same torque gains are reasonable. With a good CAI that brings about 100hp per liter. COOL Thoughts. I'm kinda new to this..
What is the price???

nah.. the cats are the most restrictive part of the exhaust... I'd be happy with another 10whp, 15 max.... an intake (only in combination with the exhaust) might get another 10whp. Unfortunately its not a zero-sum game so between everything...I'd say between the intake and a FULL exhaust....we might squeeze 35whp out of it...

Is a tune really needed with these upgrades? I'm debating about nice quality headers like Zele, but I don't want to end up losing torque changing the entire exhaust system.

Nearly 20whp gain just with high flow cats....right. It'll be sad when people start buying these and can't reproduce the results. 20 whp with straight pipes and an exhaust is at least somewhat believable

PM sent.

I took the car to get dynoed when it was 100% stock and then took it back after the cats were installed. Nothing else was changed, I hadn't even gotten gas in between dynos. Not a whole lot of ways to fudge numbers. It's not even my dyno, its an independent shop that works solely on modern American muscle cars so I see no reason to fudge numbers. The numbers I posted are the numbers that make up the difference between MY baseline dyno and MY dyno after the HFCs. Hopefully as people order them, we will get some more independent dynos.

Nice work DD...

So, if I am reading the dyno sheet right, the torque went down slightly, but it is much smoother. Is that correct?

Would the addition of a Nismo type exhaust cause enough reduction in backpressure to lower the torque output? Would that sound be to obnoxious?? I may have to take clients for a drive sometime and I don't want the car to be too obnoxious.

HFCs + Mazdaspeed exhaust on the RX8 would have made it too loud for me. Will it be the same here?

I understand, but somehow that just doesn't seem right to me. Not to be a pessimist but I haven't seen these kinds of gains on NA japanese vehicles with the simple addition of HFC's.

Anyhow I hope to be proven wrong with further independent dyno testing...

The numbers speak for themselves on this one single car. It shows you the power potenital of the BERK HFC's. On the G37's, a 12rwhp gain is TYPICAL, So 19rwhp isn't impossible. I encourage you guys to do your own dyno's as well and see what they make on YOUR car. :tup:

when u get the time...PM me a price

nice gain . I read somewhere that VQ37VHR and VQ35HR can gain good numbers by changing things like HFC and Cat-back

Do you have the Nismo exhaust already? If you do and its too quiet, then the HFCs are the next logical step. If you don't, get just the HFCs first and then decide if you want the Nismo exhaust. I haven't heard the Nismo exhaust in person to be able to tell you how loud it will be.

PM sent.

Nice gains. Awesome in fact for HFCs.

No reason for any doubt in the numbers here... it's just a before and after dyno. It's all testing. YOU'RE results might vary since it's a different car on a different dyno, same as anyone else.

Do you have a dyno of the same car with the Berk Test Pipes?? Just curious to see the difference between their HFCs and Test Pipes.....

Nope, nobody with a 370Z has the test pipes yet.

*no disrespect intended DDM, just looking for more perspective*

My question through PM was if I'll have any fitment or other issues with a Cali spec car. Maybe someone can shed some light? I'm asking because when I bought headers and a cat-back for my 03 eclipse the hangers had to be reset. I won't be living in California too much longer so I could just wait and buy the car in another state, but I'd rather not if I don't have too.

My Thoughts:

These Berk HFCs along with a Stillen Gen3 CAI, and either Stillen or GTM Catback should clear the fairladys throat quite well.

Well enough to yield a possible 28 to 34 rwhp gain, im guessing 32rwhp total.

These mods with a good tune should get us in the 39 to 44 rwhp range!

my numbers are total guesses mind you;)

My 350Z HR with just cats and adjusting my UPREV tune went from 265 rwhp to 273 rwhp and from 232~ tq to 245 tq. This was with just Berk HFCs on a stock exhaust stock intake HR 350Z NISMO.

These will fit all 370Z's. There is no difference between any of these 370Z's. CA, 49 state, JDM, European, etc. They are all the same HFC wise.

gd so I can buy HFC for my car in future :tup:

Better hurry, group buy ends in 48 hours :eek:.

i want these, however i wont take delivery until end of june early july...

bummer, hopefully there will be another gp then;)

I won't take delivery until April, but I'm getting in on whatever deals I can get!!! It is bagged up and sitting underneath my desk at the moment. :D

Unfortunately my 370Z doesn't come in until April/May. I see the Berk HFC's for $495, hopefully you will sell them cheaper with free S&H. Is this a pure bolt on? Will the Stillen Cat Back Exhaust bolt onto these?

yes, they have the same bolt up pattern as stock, making them a direct bolt on oem replacement.

Thanks kdo@milger! I think I'm going to order these along with the Stillen Cat Back Exhaust to start out.

Thats a real good start, keep us posted. :tup:

I am very interested in purchasing these. Only one question:

Do they throw a CEL??? If so, can you do anything to fix it, like space out the o2 sensor?

The HFCs o2 sensor bung spaces the o2 sensor out farther than stock. I have had the HFCs on for 1000 miles now and no CEL.

Nice!