Civic Type R gets exhausted - writeup

[Civic Type R]

Civic Type R gets exhausted:

http://members.westnet.com.au/atp110/images/exhaust/shop-front.jpg

Thursday was a big day for the Civic.
For those of you who are unaware of what lies under the hood:
1595cc DOHC VTEC
118kw Stock with short air intake
Exhaust consists of a modest 1.7/8" pipe and a damn heavy cast iron header.

I purchased for my upgrade a set of custom 4-1 mild steel racing headers based of the 98 spec Integra Type R and a replica Mugen Twin Loop exhaust.

4-1 mild steel header with heat wrap:
http://members.westnet.com.au/atp110/images/exhaust/header-side.jpg

replica Mugen Twin Loop muffler:
http://members.westnet.com.au/atp110/images/exhaust/twin-loop.jpg

First of all we ran the car over the dyno and although the front bumper created some raised eyebrows from the dyno operators by sitting less than 1cm from the ground it was time to let the engine roar the garage.
A modest 124HP@front wheels proved to be our base measurement and a curious powerband line that looked like a child drawn set of hills than a nice curve. This butt dyno showed that power tapered down at about 7800 until the rev cut kicked in at 8700.

http://members.westnet.com.au/atp110/images/exhaust/dyno.jpg

Now lets go to work.
http://members.westnet.com.au/atp110/images/exhaust/on-hoist.jpg
The rediculously heavy cast iron header and mild steel secondaries were removed first followed by the pipework.

http://members.westnet.com.au/atp110/images/exhaust/stock-piping-underneath.jpg

The old exhaust system removed:
http://members.westnet.com.au/atp110/images/exhaust/old-exhaust.jpg

The stock B16A header and secondaries
http://members.westnet.com.au/atp110/images/exhaust/stock-exhaust.jpg


The new 4-1 header had a quick polish and machine and using the existing metal exhaust gasket which was in very good condition we used a new gasket for the new header. I was interested to see the clearance and depth of the new header but all were fine. The heat wrapping at the base of the header acts as a shield to the Oil sump, located right next to the pipework.

The block:
http://members.westnet.com.au/atp110/images/exhaust/block.jpg

Our first delemma came when we matched the existing catelitic converter up with the flex pipe of the header and it wasn't compatible. Shit. Instead of slicing up the cat, we decided a matching 2.25" highflow cat to be the way to go. Not to mention at an additional expense of $260 fitted.
The next phase was now create the 2.25" mandrel bent mild steel pipework. Bit by bit the new pipework was cut and welded into place. Spot welds were the way to go and numerous stands proved handy afterall.
The twin loop was held in place to complete to new pipework fabrication and then it was time to unhook it all and get busy with the oxy welder.

Holding up the new pipework whilst spot welding:
http://members.westnet.com.au/atp110/images/exhaust/tempory-pipes.jpg

Stock cat on left compared to the high-flot cat on the right:
http://members.westnet.com.au/atp110/images/exhaust/cat-comparison.jpg

http://members.westnet.com.au/atp110/images/exhaust/new-cat-in-place.jpg

New fabricated pipework:
http://members.westnet.com.au/atp110/images/exhaust/new-pipework.jpg

The new high-flow cat was weldered onto the header and after the new pipework was fully welded together and coated with a spray of black semi gloss it was time to permanently connect it all at the flange plates.

http://members.westnet.com.au/atp110/images/exhaust/welding.jpg

New pipework in place:
http://members.westnet.com.au/atp110/images/exhaust/new-pipework-underneath.jpg

So far so good. and 5 hours later the hoist was lowered and the keys started the engine. Purrrrr! and i was very satisfied. It had a low throaty tone to it and a wonderfull aroma of fresh glue from the gaskets and steam flowed thru the twin loop tip. It smelled like caramel but who was complaining.
A few quick revvs and an idle for 5 minutes made the engine warm up for the next all important dyno run.
Again, more hairy moments wheeling the car onto the dyno but all was clear.
Time to let the VTEC roar and instantly you can see the throttle revving quicker and easier than before. A nice throaty growl tickled the ears until the VTEC let us know this car mean business. The engine kept growling all the way past redline and just before 9000rpm it cut out - much to the delight of the dyno operator who couldnt wipe the grin from his face.
On the butt chart we noticed the power line to drop off before redline but now it kept climbing hard.

http://members.westnet.com.au/atp110/images/exhaust/second-dyno-run.jpg

We uploaded the older dyno line and, wow, look at that !
The new power line was flatter and although very linear to previous, gains of 13HP were noticeable in several spots along the graph.
A measurement of exactly 134.0HP was seen at 8500rpm (500rpm into redline) So overall we can say that a gain at top end was exactly 10HP@ wheels.

http://members.westnet.com.au/atp110/images/exhaust/dynochart.jpg

Now i have effectively a 128kw DOHC VTEC at the flywheel :)

All up it costed me:
4-1 header $400
Piping $230
Header installation and polish $130
Hi-flow Cat $260
Twin Loop muffler $200
-------------------------------------
Total: 1220
-------------------------------------

You gotta be happy with that.

[A'PEXi]

nice gain :D how much did the exhaust system set u bak?

[z10]

top speed at 130km/h...i assume 3rd gear dyno?

[OLM-02R]

nice work......keep up the good work dud....

[joneblaze]

nice organised write up and great pics mate! :)
hope ur happy with the "new" car.. :P
should sticky this thread or put it in a DIY/Mods section... :)

[Civic Type R]

top speed at 130km/h...i assume 3rd gear dyno?
Yes it was done in 3rd.
4th wasnt producing enough torque to complete the second runs so he tested it in 3rd. The very first run in 4th got something like 133-134 but we were only able to get one run. :|

[luzinit]

cool dude, nice writeup, hope u enjoy your newly modded car :)

[eknine]

1hp for $122.

n/a tuning are never cheap...you must be loving every min now Adam:) ..commendable write up:)

[[[d a n n y]]]

that's mad...mate...really cool..

[Civic Type R]

thanks fellas :)
yeah the power is awsome but im more of a fan with the old exhaust sound.
This twin loop rasp is gettin to me ..

[kiddoDC2]

what brand are the extractors?

[Civic Type R]

No brand.
They were custom made

[LatinoHatchCrap]

nice writte up and nice car too :) IMO get the real twin loop next I hear those copies become too raspy after a while...

[Civic Type R]

nice writte up and nice car too :) IMO get the real twin loop next I hear those copies become too raspy after a while...
no shit !
its startin to annoy me. However it goes away when its heated up.

[Geek]

134HP = approx 100kw ?

[LatinoHatchCrap]

134HP = approx 100kw ?
wot other mods have you got?

[Civic Type R]

Thats it. :)
all my mods are in the writeup.

[Civic Type R]

134HP = approx 100kw ?
yes 100kw @ wheels

[olda]

I'm not disputing your final figure, however the start up figure seems to be a bit high for stock VTiR Civic. 92Kw at wheels?
Stock VTiR Integra is usually quoted at 85 Kw, Type R Teg at 100Kw.
U see what I mean? :?

[[[d a n n y]]]

hm....dunno

may b the figures wrong but 134Hp at the wheel is about 100KW at the wheel mayb a bit less but yeah good job mate..

nice work
:P

[Civic Type R]

I'm not disputing your final figure, however the start up figure seems to be a bit high for stock VTiR Civic. 92Kw at wheels?
Stock VTiR Integra is usually quoted at 85 Kw, Type R Teg at 100Kw.
U see what I mean? :?
Dont you start.
Dynos are all different.
A DC2 ITR at Dynowars with just a new muffler got 160HP at the wheels.
Using tht dyno - i would have 140 at the wheels.
But thats not the point is it :)

[Civic Type R]

OK look at it this way and hopefully we can prevent the 55th arguement over dyno figures.
My B16A produces 118kw right = 160HP at fly.
As we all know, power is lost from the fly through the drivetrain to the wheels and we end up with roughly 85% of this power by the time its transferred to the ground.
I gained 10HP at top end and 13HP in some areas along the powerband in random rpm areas. This 10HP gain at the wheels equates to about 12HP gain at the fly. 12HP = 9kw so thats an extra 9kw i can add to my 118 = 127KW.

Hope all that made sense :)
At the end of the day, who gives a rats if the first dyno was 450HP and the second was 460. It doesnt mean a thing. It still shows i gained 10HP ATW :P

[VTEC16]

ill agree with you there.....just dont go around claiming that you have 450HP :P

[eknine]

as long as Adam is happy and it indicate a postive foward...that i see is more than enuff:)

...endless:)

[Civic Type R]

im happy but im keen to sell the replica mugen twin loop now.
offers :)

[EG_2_TEG]

i've noticed the sszzz noise on many honda's just after they've been started :)

pretty much goes away when engine reaches normal temp ;)

[Civic Type R]

My sszzzz doesnt go away ...

[Civic Type R]

I just got my car dynoed today at a car show shootout.
Motorvation 2004.

Dyno Dynamics dynometer (Formaz Performance 2WD run)

my lil civic got 152.7HP @wheels - and i won the category and a trophy ! :D
and 143.2 in stereo SPL !

[VTEC16]

well done mate!!!

post a pick of your trophy :D

[Civic Type R]

here u go :D

yeah !!!

http://www.integrated.org.au/cars/motorvation04/page3/images/Motovation%20'04%20133.jpg

[OLM-02R]

nice one mate....

[VTEC16]

thats chronik dude!.....i want a trophy too!!

*continues saving for engine mods*

[LatinoHatchCrap]

http://www.integrated.org.au/cars/motorvation04/page3/images/Motovation%20'04%20133.jpg
SICK MATE!!!!! HONDA ROCKS :dance: !!

[luzinit]

wd buddy! it all paid off (:

[civicboy]

westssssiiiiiide! repesentn! ;) hehehhee congrats bro

[Civic Type R]

Westside !! :P

cheers

[EG_2_TEG]

I just got my car dynoed today at a car show shootout.
Motorvation 2004.

Dyno Dynamics dynometer (Formaz Performance 2WD run)

my lil civic got 152.7HP @wheels - and i won the category and a trophy ! :D
and 143.2 in stereo SPL !

and here it is:

http://www.integrated.org.au/cars/motorvation04/videos/civictyper.avi :D
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[bumthology]

civic vti-r?
i thought it was civic type-r

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[Civic Type R]

civic vti-r?
i thought it was civic type-r

=\
its a converted VTiR :P