some of you may know i'm planning on a complete spoon exhaust system. i wanted to start this thread to clear several things up before i make the final purchase(s) of the remaining parts.

thus far, i have these parts:
spoon header gasket
spoon 4-2-1 header
2.5" donut
smsp modified carsound*
spoon b-pipe*
spoon n1 muffler

* is next to items i have yet to purchase.

i have been im'ing several people with the smsp carsound modified cat to see what their experience was/is in conjunction with their spoon 4-2-1 header. it seems as though this is the cat to run to achieve the best fitment and quality.

with regards to the spoon vs. type-one b-pipe discussion, i have made the decision to go with the spoon b-pipe for several reasons. 1) fiment quality; many threads on issues with quality of fitment. 2) spoon probably through their r&d took the time to specifically develop the b-pipe with their header and muffler (both of which i have). and, in terms of exhaust velocities, am hearing from several itr guys that slowing the velocity down (in this case, running the type-one, which has a larger id) is not necessarily good. it would be very interesting to see a dyno plot of b-pipe comparisons between the spoon and type-one in this setup.

does anyone have any input as to what might be a better direction to go? most specifically, i am trying to determine which cat will work best in this system.

thanks for reading!


Modified by kepani at 7:01 PM 6/17/2003

 

You know which direction to go.

Your plan looks good.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kepani &raquo;</TD></TR><TR><TD CLASS="quote"> in terms of exhaust velocities, am hearing from several itr guys that slowing the velocity down (in this case, running the type-one, which has a larger id) is not necessarily good. </TD></TR></TABLE>

that would never be good , exhaust is all about maintaining a constant velocity , one of the reasons bottlenecks kill power....

 

you are just hurtling towards 10000 posts arent ya....

 

Go with the spoon b-pipe and carsound cat. I just have the b-pipe left to purchase and we will have the same setup. I can just hear it now . I should be buying the b-pipe within the next couple of weeks . Ill let you know how it goes if i end up purchasing before you.

 

You know the reason why we dont sell Spoon b-pipes..... we were having some problems with them ... the resonator started to rattle in 2 weeks and we found the resonator were gone (broken inside) we submit this problem to Spoon but the problem has not yet been solved.

I will suggest you to go any other make b-pipes, dont get it until Spoon revised and release a new version.

 

Interesting. Thanks for the info. Hopefully Spoon will have a newer version b-pipe available soon..

 

if you are concerned about bottlenecks, how are you planning on dealing with the connection between the cat and the b-pipe. the cat is 63mm and the b-pipe is 60mm...no?

 

i don't think there is anything that can be done to remedy the increase of id from the collector to the cat, and in turn, the decrease of id from the cat to the b-pipe. other than that, it should be a continous diameter right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AJ PwR &raquo;</TD></TR><TR><TD CLASS="quote">You know the reason why we dont sell Spoon b-pipes..... we were having some problems with them ... the resonator started to rattle in 2 weeks and we found the resonator were gone (broken inside) we submit this problem to Spoon but the problem has not yet been solved.

I will suggest you to go any other make b-pipes, dont get it until Spoon revised and release a new version.

</TD></TR></TABLE>
i suppose the vision b-pipe would be the same as the spoon?
im thinking about that set up but i wanna run t1r cat / t1r b-pipe and spoon n1!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AJ PwR &raquo;</TD></TR><TR><TD CLASS="quote">You know the reason why we dont sell Spoon b-pipes..... we were having some problems with them ... the resonator started to rattle in 2 weeks and we found the resonator were gone (broken inside) we submit this problem to Spoon but the problem has not yet been solved.

I will suggest you to go any other make b-pipes, dont get it until Spoon revised and release a new version.


</TD></TR></TABLE>

who manufactures the t1r b-pipe?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by exzeltus &raquo;</TD></TR><TR><TD CLASS="quote">

who manufactures the t1r b-pipe? </TD></TR></TABLE>

the answer lies in your question...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doctor CorteZ &raquo;</TD></TR><TR><TD CLASS="quote">

the answer lies in your question...</TD></TR></TABLE>

so then why does the spoon have problems while the t1r doesn't? that just seems to be the issue, it might not be true at all.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by exzeltus &raquo;</TD></TR><TR><TD CLASS="quote">so then why does the spoon have problems while the t1r doesn't? that just seems to be the issue, it might not be true at all.</TD></TR></TABLE>

What?

Spoon and T1R are NOT the same company. Type One is both the name of Spoon's retail division in Japan and the name of a company who makes parts.

Spoon does not make parts and sell them badged as "T1R".

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doctor CorteZ &raquo;</TD></TR><TR><TD CLASS="quote">

the answer lies in your question...</TD></TR></TABLE>

with that last answer, i now understand your question. I just thought they got someone to produce it for them and then they just put their label on it.

 

Make sure you get the jdm length cat and not the usdm. Unless you go with the T1R b-pipe.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueBalls &raquo;</TD></TR><TR><TD CLASS="quote">if you are concerned about bottlenecks, how are you planning on dealing with the connection between the cat and the b-pipe. the cat is 63mm and the b-pipe is 60mm...no?</TD></TR></TABLE>

yeah, i just checked those stats and he's right. what's up w/ that? I'm sure there's a reason it's like that.

 

if only message boards had an online sketching table!

i'm still confused as to how everything fits together. maybe it's not that difficult in the end...but i want to start fresh and try to define some terms.

1) when one says "jdm length header", does this imply that the point at which the collector is located is at the same location as a "jdm length header" from say jun or any other manufacturer?

2) which is longer - again with respect to location - the "jdm length b-pipe" or the "usdm length b-pipe"?

now, all of this could be a moot point if the terms "jdm length header" and "jdm length b-pipe" are terms which describe the generic length of each item; meaning one is longer and one is shorter.

let me know if this makes sense.

i am also looking into running an oem jdm itr cat, but from several threads from searches, it appears that they do not have the o2 bung as required by obdii. has anyone had any experience with this setup?

 

IIRC, JDM length b-pipe is longer than the USDM b-pipe which will require a shorter cat to fit properly. Either that or hack up the JDM b-pipe to make it fit a USDM length cat.

Edited - Not sure about the JDM header length thing anymore since Dave/SMSP posted something in regards to length.