I got materials today for the weekend project thanks to Stan's headers in Auburn, WA they really know what they are doing! They make custom app. headers and parts. They gave me some helpful advice. I really liked there swivel ball joint looking collector and the best thing is NO GASKETS NEEDED!

My project I bought a H22A 4-2-1 OBX header off ebay for $150 for my crx. I scrapped the downpipe (bottom half of the header). It was way to small for what my build up will consist. I think it was a 2" exit, plus I needed it to hug the oil pan better like the OEM header. I needed a 2.5" exit. The primaries on the top half of the OBX header is decent 1 3/4". I will be opening it up to a 2" OD at the flange and will go into a 2.5" collector so the bottom is a 2" 2 into 1 into 2.5 collector and finally into my 2.5" exhaust system. I spent a lil over $100 on materials. It should perform real nice. I will be taking it to the dyno begining of next week. I will post pictures of the install and final result.

 

good luck and keep us posted

 

where did you get the 2 to 1 collector?

 

Good ****...Like to see mods are going into that car little by little

 

I had a few hours today so I started on the header. I bored out the header flange and downpipe flange to 2" taper bore. Next thing is to port match the header and slap it on and start the cuting and welding...I'll post more pix of the progress tom.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ExplicitSpeed360 &raquo;</TD></TR><TR><TD CLASS="quote">I had a few hours today so I started on the header. I bored out the header flange and downpipe flange to 2" taper bore. Next thing is to port match the header and slap it on and start the cuting and welding...I'll post more pix of the progress tom.

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I always love these types of threads because the guys doing the work gain an appreciation for the amount of work required.

 

I can definetly appreciate the craftmanship of the high dolla headers

I spent about 4 hours today on it and knocked out the dowpipe. Basic cut and tac method. Turned out pretty decent for my first header experience. Stock OBX went from 1 3/4" primaries all the way into a 2" collector and exit. The new header goes from 1 3/4" primaries to a 2" runners and finally into a 2.5" collector. Definetly an approvement! I will post pix tom. of it installed and my new custom 2.5" exhaust system. I am eager to see how it will do on the dyno this week.

 

I am hoping to get atleast 180 whp and am skeptical if I will see more on the p13...

obd1 JDM h22a LSD i/h/e
PnP by me
SS valves
stock valve springs and retainers and JDM cams
Unorthodox crank pulley alt. only running a D series alt. less drag, lighter
8 lb fidanza flywheel
Stage 3 XTD clutch
BandM FPR
Spoon chipped jdm p13 5500 vtec redline dont know never taken it that high
Secondaries actuated at vtec

 

llooks like you spent a lot of time, good job. I'd look into replacing your 2-1 with a merge collector though.

 

Sick man, nice work. Let us know how it works.

 

good job@ post it in the fab forum too!!

 

thanks for the kind words...it made a night and day difference, throttle response is quicker I feel more hp and tq. Cross my fingers for dyno d day...I'll post pictures in the next day or so of the final result...

 

That is cool that you are making your own. I wish more people would appreciate the work that some of us do. I hope that you get the numbers you need.

Pirate

 

Well here are the numbers on a dyno dynamics dynamometer at Horsepower Connection local here in Olympia, WA. Real nice guys and knowledgable. He has a 1200 hp Twin Turbo v8 66 Nova drag car. There website is http://www.HorsepowerConnection.com . I was quite pleased with numbers on a p13 ecu. Peak hp was at 6900. I made 158 ft lb tq at 3200 rpm. My base today was 182 whp slight adjustment of the cam gears and dist. Which makes me believe I am near max with the jdm h22 cams and or the p13 ecu. Type S are on my wish list along with a p28. My mods are below. The header really seemed to help out a lot.

obd1 JDM LSD H22A I/H/E
SS valves stock replacements
PnP by me stock else
30k mill of the head
Skunk2 cam gears
BandM FPR at 45 psi open throttle
8 lb fidanza flywheel
stage 3 XTD clutch
secondarys hooked up to vtec 5500 rpm
spoon chipped JDM p13 ecu






Modified by ExplicitSpeed360 at 7:18 PM 12/7/2005


Modified by ExplicitSpeed360 at 7:19 PM 12/7/2005

 

nice work