I bought an SMS Carsound highflow CAT. It is bolted
onto my JDM DC header and the fitment wasn't that
great. The CAT is not exactly inline with the header
and the exhaust and every time the car picks up, due
to the movement ofthe engine, it creates very very loud
clicking noises at the connection of the CAT and header.
The only solution is to reweld it
to make all the parts inline.

Anyone else have the same problems?

 

Connection at the donut gasket on the header is not a flanged connection, it's a flared connection and should be able to be mounted a bit off angle. Tighten **** up and see what happens.

bend/adjust your hangers of the B-pipe to remedy some of your alignment issues.

If you have a real problem, i suggest you contact dave directly.

D

 

Thanks D

My CAT was installed by a technician at the dealer, I went back to him
a few times to disconnect it and reconnect it and tighten it up
even further, but no luck. It's not a major problem, but it's
very annoying. I was thinking of contacting Dave, but I just want to know
if it's just me or that's the way it is.

 

question: are you using JDM lower header bracket?


dunno, mine was built damn near perfect. O2 bung is in just about the only position it could be. welds were perfect. i did also cut off the existing 3 point flange on the b-pipe, and weld on the tapered transition. but you should definatly be able to accomodate for any variance in the connection with the flared joint. I did have some annoying squeeks coming from my donut gasket that i couldn't get rid of, so i ended up swapping that out with another spare gasket i had laying around.

D

 

I didnt use a JDM lower header bracket for my DC JDM header. It all bolted up perfectly. Dave will address any issues that you have with your purchase, please contact him.

 

Boba - did i ask you??????


heh, just jokin...

D

 

Who are you? I did a personal search using your email address in your profile and I had no matches, so I assume you contacted and purchased through me via another address. Did you use a new and properly sized donut and were the spring bolts tightened correctly?

 

Citanest-Which carsound high cat do u have? 94006 or 54006?


SMSP-Dave, Mike told me that there is really no difference btwn the two cats and that I wouldnt feel a differnece in hrspwr, is that true?

 

Yes It is true and in a week or two when one of my local customers gets back from vacation I will Dyno Prove it. "On a larger engine yes there will be a difference on a mildly modded ITR or Stock ITR No there wont be any differences."
We usually sell the 94006, but like we told you we didnt have any available until next week, If you want we can switch it for you but its not going to make a difference.

BTW The above quote was from Car Sound

 

R-Rated, I just got off the phone with Carsound and they told me that they are going through flow testing of all their cats and it should be completed in a couple of months. I was told that the estimated flow for the 94006 at 28 inches of vacuum is around 400 cfm. He said that you could use the ratio of rated engine size to estimate the flow numbers for the 54006. The 54006 is rated at 5.0L and the 94006 at 5.9, so (5.0/5.9)*400= 338. Now these are only estimates so we can't be positive.

If you want, I'll provide you with a 94006 cat with the proper adapter for your system and you can dyno that set up. Then maybe Mike can provide you with a 54006 cat that you can do a back to back comparison on. Then you pick the one you like better and if it's mine I'll discount it 1/2 the price of the dyno or some other mutually agreed upon amount.

 

Dave I normally Use the 94006 for this application, R Rated was told this, However we didnt have any in at the moment and he wanted the setup asap, The 54006 will work fine, if he wants the 94006 I will send him one wednesday when they are ready, and he can use this one for now.
Also I can do the dyno test fairly because I have nothing to gain by having them make the same amount of power since i sell the 94006 for the ITR.

 

Yes, I know you told me a while back that you were using those 94006. My gutt still tells me the 94006 is the better cat. As you know, there isn't any cost difference between the 2 so that won't matter to the board members. It would still be interesting to see an acceleration or dyno run comparison between the 2. I suspect the difference will be in the upper rpms, but who knows.

 

Dave,

what would be a bigger cat that would flow well for the R's with Jun or Toda cams?

 

TyperMsm- Mike , I dont think there will be a problem with that cat but I we will have to see until I put it on. So you will send me the 94006 if I dont like the 54006? Could you provide dynos for the 2 when you get the 94006's? I just want to make sure I have the best cat for the header I'm running. Dont mean to be a pain. Thanks Mike

SMSP-Thanks again for the feedback Dave.

 

MD-

Flow through a cat is based on how many cells there are. You determine this by multiplying the brick area by cells per square inch. The cells per square inch is the same for all CarSound catalyst material (bricks), so the only way to get more flow is by increasing the cross sectional area of the cat. CarSound offers one other larger cat (overall 4" x 7") versus the 4" x 6.5" of the 94006. Now these dimensions are of the outside of the cat so the % changes aren't extremely accurate. But if you compare those sizes the larger cat should have an area of about 7% more than the 94006. However, this cat (93006) is a little more than twice the 94006.