I'm currently picking up parts for a mild H22. In the end it should be bolt-ons + Crower IIs/RM valvetrain + hondata. Possibly a bit of FRM-friendly compression if I get a little crazy. I've got the cams/ems stuff, and I'm looking at sourcing a header.

I'm aware of the saying that an all-motor setup is never complete without a quality header. To that end I've got in touch with John at Hytech and Dave, and amazingly enough both would be happy to take my money and send a header to Canada ().

I don't doubt for a second the results a quality header can pick up with the right setup, I've seen the dynos. I'm wondering, though, if a good header will be worth it if I'm going to try to run it through a crappy exhaust.
I have a 60mm RS*R Exmag, so it's not only small, but also chambered. I wanted something that's not going to bother me for day to day driving (and it doesn't), but I'm under no illusions as to its limited capacity to flow air.

Is it worth commiting big money to a header in this case, or would I get the same results from a lesser one? I'd prefer to only buy one header for my engine, and not regret it later.

 

I am no header expert but for the 60mm 2.4" exhaust system your collector would be 2 1/4" even tho a 2.5" is ideal but I dont think the collector would like to go big to small always small to big

Greddy is a good header and i think has a 2 1/4 collector?

At the moment making a custom 4-2-1 header using obx top header and making my own downpipe. The obx 1 3/4" primaries are decent and I will step it up to 1 7/8" and into a 2.5" merge collector and into a 2.5" exhaust system





Modified by ExplicitSpeed360 at 8:26 AM 11/10/2005

 

bump

 

Get rid of the RS*R Ex-mag, it was actually my first exhaust I know why you want to keep it for the quietness, but it really limits the horse power gains especially at the top end.
Back in the day when I installed Type S cams, and it didn't give me any gains on the dyno. I then switched to Greddy EVO from RS*R, and I gained 10whp at the top. Chambered exhaust restricts air flow creating a huge bottleneck.
Get yourself a straight through 2.5" exhaust to go with the header for maximing power gains.

 

10whp from one 60mm exhaust to another, and no gains on the cams? Geez, I didn't expect the RS*R to be great, but that's terrible.

How much power were you pushing at that point?


The problem for me is finding a tolerable sounding straight through exhaust. I don't think I'm hardcore enough to live with a honda fart can noise day in and day out.

 

i am in the exact same predicament as you. I currently have my rmf bolted up the stock exhaust. my plan is to get an rs-r exmag. because it is the only exhaust i can tolerate. i dont want a loud obnoxious exhuast system. even the ones that are considered mild sounding are too much for my taste. i cant imagine the rs-r being that bad, resonated or not. RS-R is a rather well respected company with money for R&D. 10whp from switching exhuast is strange. was there any tuning done with new exhaust after switching??

 

My car wasn't tuned with either exhaust, settings on the VAFC were the same.
The 10whp gain wasn't from the exhaust alone, its mostly from the Type S cams. The chambered non-straight through design of the RS*R ex-mag really restricted the airflow thus the cams couldn't perform the way it meant to be. I was blowned by the gains once I put the Greddy Evo on.

You will eventually need a free flowing exhaust to make use of bigger cams, as well as custom headers. I gained anywhere between 5 to 35whp along the graph switching from Mugen to SMSP header.

You should get a 2.5" custom exhaust and use two resonators in the center pipe, and run it with a straight through baffled muffler. This way you can have the best of both worlds.

 

^^^hmmm this info is killing me. i had my heart set on that exhuast. i do plan on installing type-s cams too which makes me not want to get this exhaust. did you dyno on the same dyno both times?? this sux how does the evo exhuast sound?? i cant see spending all that money on my header to have it restricted by an exhaust system. btw totally thread jacking sorry. but the ifno is relevant at least.

 

Both runs were done on the same dyno.

I loved the subtle looks and the sound of the RS*R ex-mag, but its not meant for performance. If you have to go with the brand, get the GT-series instead.

Greddy EvoII is deep and pretty loud especially at WOT, you will definitely start off some alarms as you drive by.

I then switched to Tanabe Ultra Medalion for its light weight design and N1 looks, but it was even louder than the Evo. I had to ditch it because of its bottleneck at the cat flange, which is main reason to go custom exhaust.

Later I bought the T1R exhaust and ran it for a few months, it did not have bottleneck like most aftermarket systems. I had to sell it for my SMSP header because it wouldn't bolt up.

Right now Im running SMSP header & exhaust with 2 resonators and SARD racing muffler.

 

^^how does that sound with the two resonators in comparison to the rsr and the evo?? any info on a thermal?? still restrictive?? it at least looks stock...

 

My current exhaust setup is extremely loud mainly because of the racing muffler, it sounds like a race car.

I dont have much info on thermal exhaust, but they are suppose to sound pretty deep.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91preyludesi &raquo;</TD></TR><TR><TD CLASS="quote">^^how does that sound with the two resonators in comparison to the rsr and the evo?? any info on a thermal?? still restrictive?? it at least looks stock...
</TD></TR></TABLE>

 

I think the ES oval sounds great and many people I know agree with me. It's a simple straight through desighn thats 2.5 in on both ends. It's a little deep but nothing a good 22 in resonator cant quiet down. Best of all its available in flat black so its completely low key. BUT I cant tell you any performance aspects of it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91preyludesi &raquo;</TD></TR><TR><TD CLASS="quote">^^how does that sound with the two resonators in comparison to the rsr and the evo?? any info on a thermal?? still restrictive?? it at least looks stock...
</TD></TR></TABLE>

Leo is running (2) of these 3" resonators I believe.



The muffler he used was something he procured elsewhere.

The last Thermal system I saw was a 3" version for the ITR. It didn't have a resonator and the muffler looked to be a non stamped Magnaflow.

 

You have good memory Dave

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

Leo is running (2) of these 3" resonators I believe.

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

 

I emailed you again Dave, this time about the possibility of a whole SMS exhaust setup. I like my RS*R, but VSBB6 has destroyed my hopes and dreams

I guess I should look at the good side of this. I previously didn't really want to get a SMS header because I would have to hack up my b-pipe. Now I need to throw the whole thing in the garbage anyway!

 

^^ so what do you think you are going to do?? custom 2.5 exhuast or name brand exhuast system?? keep us posted if you get your exhuast setup. im interested to hear your opinion since i too am looking for a quiet yet powerful exhaust.

 

[QUOTE=91preyludesii too am looking for a quiet yet powerful exhaust.[/QUOTE]

Somewhat tough to have both adjectives in the same sentence. But there are many degrees of "quiet" out there. Remember back pressure reduces sound.