NSX-Tuner

Like some of you, I'm getting a little anxious about the availability of the CT b-pipe. Here's the latest as of 6/17/03:

I wasn't quoted a real price yet but I've been told that the b-pipe might be between $300 and $400, most likely less than $500. Also, all the parts are in house and are waiting to be assembled. When posing the question "will the b-pipe be available before the end of July" I was told "most likely so...".

I've been calling them about once a week for updates. I'd suggest that we all do the same.

Call toll free 888.626.6783

Titand19

I'm confused. This is a replacing the Y-pipe? Why is it s much?

NSX-Tuner

All I know is that it's:

• 2 1/2 inches in diameter
• About 4 foot long
• Has a resonator/muffler near the end where it bolts to the Cat
• The other end bolts to the two axle-back exhaust-mufflers
• 100 % SS

fahoumh

just to make sure I understand...with CT headers, exhaust and this B-pipe, we'd have a full stainless steel exhaust system setup?

lou_RENAMED

Mike B has mentioned that this mod is more for the S/Ced CL-S for N/A the gains are negligible

so save the $500 unless your S/C and even then gains are only like 5 hp for $500 = 1 HP for $100 :thumbdn:

Titand19

Just get an exhaust shop to make you one.

NSX-Tuner

Everything would be SS except for the Cat (is the stock cat also SS?).

Doc.Booty

I'd consider it just because i want an all SS exhaust system - salt on the roads in the winter has been hell on my stock setup.

NSX-Tuner

First off, Mike B is no longer running CompTech's Forum. I believe this was due in part because of the accumulative affect of inaccurate information that was being disseminated on the forum that eventually caused a lot of confusion between customers (us) and CompTech Sales. The b-pipe at the time when Mike B made his claim was based on no facts only speculation - IMHO.

Secondly, if the CT intake and headers are installed without the CT axle-back exhaust, the effective HP gain will be much less throughout the exhaust system. Installing the CT axle-back exhaust will uncork another 5-7 WHP because of the bigger diameter pipes and better flow through the muffles.

So it only makes sense if you increase the size of the b-pipe say from about 1 7/8" dia. to 2 1/4" dia. this will improve gas flow efficiency throughout the entire exhaust system (please note: not sure about exact stock and CT pipe dia. but I believe they're close). For non-SC'd engines, this could uncork another 2-5 WHP, maybe more. For SC'd engines, maybe another 5-10 WHP, maybe more. Keep in mind that the b-pipe is the longest exhaust component (about 6-7 ft. total length including the y portion of the pipe) and may be the biggest bottle neck.

Another thing to consider is that the CompTech prototype CL dynos (according to Nate) at around 325 WHP with i/sc/h/b-pipe/e/flywheel-clutch installed. On the CompTech website, they show 299 WHP for i/sc/h/e on the dyno chart. So where is that roughly 26 WHP coming from? Certainly not all the WHP gain is from the lightened flywheel and clutch assembly.

Even I'm speculating here, so we should wait for the dyno numbers from CompTech.

schoeny14

so is comptech telling us that our stock exhaust is actually really good for the NA setup and they are basically just making a SS cat-back system for the sake of it being SS?

lou_RENAMED

exhaust maybe 1-3 HP b-pipe maybe 2-4 no way more than that from increasing pipe diameter you still have the cat restricting air flow remember. for the $500 for the b-pipe makes no sense at all IMO and Im a comptech buff...I think they are running out of mods for the Cl-S and they are still trying to get some money from the cl-S owners even if its not much gains

think about it even the Ice-box will give you more than the b-pipe...it would look nice but $500 is ridiculous dont you think

J.T.'s 3.2CL

I assume this will work with HKS exhaust as well?

typeR

im hoping the 3.5 can benefite here as well...but i think ill be going with the HKS exhaust if any

NSX-Tuner

I can't say for certain, but I did see the CT b-pipe up close and compared it to mine. It looked to me that it would just bolt in between the cat and stock exhaust without any mods.

CLS2001_97124

Interesting... But I don't think it would be worth the money for that kind of gain... Like Titand said... I rather have a muffler shop make a good pipe for me for like $250...

types1967

ok heres a good question im supercharged with everything including the flywheel upgrade.is 5hp gain at the wheels or at the crank?second only 5hp on a supercharged car?does anyone know?

Titand19

Damn right. Cat-Backs are not rocket science. Once this B-pipe comes out, there's gonna be some sucker in town that gets it, and the other smart assholes(ME) asking to see it and having shop just recreate the design.

This pipe is pointless unless you have FI. Minus well take out the cat if you want some real power.

NSX-Tuner

I believe we're talking only WHP. As far as the actual numbers, it's all speculation. Also several people at CompTech (most recently Nate) claim their prototype CLS with all the goodies dynos around 325 WHP where as their website shows only 299 WHP for a CLS without the CT flywheel and b-pipe. You could draw some conclusions here.

Question for you types1967 ... do you have any dynos numbers for your CL? If you have a similar setup, minus the only the b-pipe we might be able to get an idea of some numbers.

types1967

well i dynoed at 296whp without the clutch upgrade.but the lightweight flywheel would not show up on the dyno if i stand correct.

NSX-Tuner

Oh... one thing I forgot to mention... I was handed a new CompTech CL 3.2 brochure last Thursday when I visited them. In it, they said the b-pipe would provide a slight change in exhaust note. When I was given a test ride in the prototype CL, the exhaust note was awesome, but not to load or obnoxious.

So I'd consider buying a CT b-pipe and exhaust combo because of the following reasons:

1) All SS
2) Between 8-12 WHP gained from the two exhaust componets ( still speculation, we don't really know yet - but if true... )
3) Awesome exhaust note
4) I'll probably install the SC within a year.

Besides, I feel like burning some $$$

NSX-Tuner

I've asked that question a couple of times before and they (CT) said the lightened flywheel won't show up on the dyno.

So the point I've been trying to make is if CT's claim of almost 325 WHP on the dyno for their prototype CLS, where's the extra WHP coming from. Most certainly the b-pipe must be some percentage of that gain. But again, we can only speculate for now. Maybe when you get the b-pipe (assuming you would), you could provide some new dynos numbers.

mattg

just a side note, our stock b pipe is stainless.

lou_RENAMED

dude 325 whp is fawking awesome with 3.5 boost are we sure of these numbers they sound a little too good to be true your looking at what 400 hp to the crank

NSX-Tuner

lou ... I'm only going on what CompTech told me... I hope these are good numbers and not blown out of proportion ... (pardon the pun) ... when they say around 325... does this really mean 320, 315??? even if it was 315 WHP... that would be a lot of ponies...

juice

Are you sure? I did not think that our exhaust system was SS.

mattg

the pipe is. the pre muffler, mufflers and hangers are not.

Caddy©

I agree here. I have a Good Friend at the Muffler Shop. If this is all there is, I can get him to make me the same pipe for less than half the 400 that this thing will probably come in at.

lou_RENAMED

I think Comptech is doing the old

220 whp stock +
32 whp headrs +
57 whp S/C +
5 whp exhaust +
10 whp b-pipe +

= 324 whp but we all know dyno does not work this way a little over 300 is more like it and thats max

mr. big

so if are are all stock and just buy the b-pipe, are u guys saying that there is no point and it will be a total loss? W/o S/C and stock exhaust should i even consider it?? Will there be any changes in the stock exhaust note?

NSX-Tuner

My bet is that the b-pipe release price will be $375. If this is true, I'd rather buy the CT b-pipe that carries a warranty than have a muffler shop do it for $250. Beside, CT has put a lot of R&D into the resonator part of the b-pipe to make sure the exhaust sound quality isn't ruined.

NSX-Tuner

I was told that the 325 WHP number was from a dyno run not a guesstimate like you mentioned. I hope this is true and not smoke and mirrors...

typeR

sometimes it's the opposite...a turbo that adds 50 hp and an exhaust that adds 10 together might achieve 75

skinsfan202

true

Red Rider

You got me ready to spend more $$

Titand19

Warrenty on a b-pipe? God forbid the pipe causes failure somehow.

mr. big

will there be any good gains if ur running on intake and stock exhaust?

types1967

im just going to put 2 nitrous bottles on the car and acheive 600whp while i go down in a blaze of glory lol lol maybe i can get to the moon with the blower and 2 bottles

fahoumh

what about rust?

fuzzy02CLS

iTrader: (2)

Stainless steel doesn't rust

t-rd

Get ready for some massive low end torque loss if you N/A guys are getting this. You need that extra low end power from an SC to compensate for this. There are countless 2.5" catbacks made for 3.0 V6 Accord, a lot of guys eventually sold their catbacks because the top end gain was not worth the low end torque loss. I sold my piece of shit 2.5" catback system because I was actually lagging behind stock Accords off the line! Anything below 3k RPM will cause a slowdown in exhaust gas flow rate because of the larger piping diameter. And YES, stock Honda/Acura Y-pipe is already stainless steel, it is just not polished with a shiny finish. Also with a larger b-pipe, prepare for a louder exhaust note. Those who thought just the Comptech mufflers were loud and had to use a quiet insert tip, scratch this off the list now.

And NO, the b-pipe is not the biggest bottleneck of the Honda/Acura V6's, it is the exhaust manifold. That's why the headers give so much gain over exhaust or intake mods.