Next time!

 

1. Reserved
2. Thndrgd
3. Profink
4.350Zimo
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Only 4 people? What happened to the rest?

 

My guess is that they were hoping for a better price. Especially with Berk Technologies releasing their HFC right around the same time for $450. If Crawford was able to offer some Dyno numbers I'm sure a few more people would jump on this.

 

Yeah, that's the route I'm going...The gains on the Berks are proven and the price is cheaper..

 

Cheaper or not, Crawford has been around much longer than Berk in our world and is much more familiar with the Z and its VQ engine. Crawford has established a credible name within the Z community and has contributed so much. Someone from Crawford will post on this thread the benefits of their cats over Berks and explain the differences between the two shortly. All I can say is, you get what you pay for and as a Z enthusiast myself, I'd rather pay a little more and go with someone that I know will be 100% reliable and has an established name.

 

Well with the Berk out and dyno chart for it.I am thinking twice which one to get.

 

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half way there

 

I agree to a certain extent...But just because the Berks are a little cheaper doesn't mean that they are crap..I know your trying to sell the Crawfords and all, so I do understand your basis..Berks has been around for a while and has produced some nice products for the S2000's so I know they are a pretty reliable company and have great customer service...

Not to call you out on the subject of quality, but hasn't there been some problems with the Crawford HFC's on some cars???? I did some research on the Crawfords and it seems some people have had them crumble apart on the inside..Correct if I'm wrong and again, not trying to start an argument, but if I 'm going to buy a $500+ part, I want to make sure it is a top notch part that will last...I'm sure you understand being a Z enthusiast as you stated.

 

bump...any more??

 

Berks is the only co. with before and after HFC dyno sheets, haven't seen Crawford or Fast Intentions post dyno sheets... so I'm going with Berks...and Turbo XS exhaust.

 

Let me see if I can answer some of these questions.

The cell count is simply the amount of cells or openings per square inch, i.e., a 400 cell cat will have 400 cells per square inch while a 300 cell cat will have only 300 cells per square inch, so the more cells per square inch the better the flow.

Now we have the debate of whether to go with metal substrate or ceramic. Nissan in their oem cat design has the ceramic cat in front, closest to the engine exhaust manifold, and metal in the rear because the ceramic will hold up to the upstream exhaust heat far better. As I remember 3 years ago, one manufacturer had all kinds of issues using metal cats so close to the exhaust manifold because a lot of them melted down.

Our cats do have ceramic substrate and the 400 cell count per square inch with a much larger cross section than a lot of the other cats available, which means they will absolutely flow more.

As far as the ceramic substrate melting down or cracking yes it can happen if you rev or high rev the engine cold which dumps a lot of excess fuel on them, turbo motors can do the same thing because they run such an excessively rich fuel mixture.

 

^^ Thanks for the responze Mr. Crawford. Sounds like your cats are good quality/designed well, but can you provide evidence your cats flow better than Berk (Berks HFCs produced 7.8rwhp and 10ft-lb torque - Metallic HFC)? Can you perform/post before and afters with oem and then your cats on an 07 Z?

Thanks.

 

post a sound clip when u do this, preferable under load, not just free revving

thanks

 

Video as you requested..

http://www.youtube.com/watch?v=MF2JXqzVcfM

 

thanks, i've already seen that vid. i wanted to hear the berk car and turbo xs exhaust combo. cause all the vids i've seen with the turbo xs exhaust, they also had test pipes resulting in a pretty raspy sound. i wanna see if thats fixed with HFC's.

correct me if i'm wrong, but the car in the vid has a nismo exhaust as far as i know


*sorry for jacking crawford's thread

 

Yes ,I think it has a NIsmo Exhaust.

 

Crawford? Please answer my questions.

 

Sorry we don't have an 07 car to dyno at this time, we do know that on the old cars the cat's dynoed consistently 6 to 8 rwhp. Besides if we did do a dyno on the cats most people wouldn't believe it anyway, because the manufacture preformed it, at least that has been the consensus in the past.