well i finally got around to modifying my DC header collector. While doing some measurements, the stock DC collector is 1.8in ID. This has to be hurting performance, so i decided to cut it off and have my cousin weld on a 2.5 in collector, and all the other necessary parts of it (flange, o2 bung, hanger).

without further adue...

 

cool
have you given your lude a drive since completing the "surgery" ?
Also what are you now using in place of your stock cat?


[Modified by Mike95lude, 7:57 PM 3/26/2002]

 

well, all at the same time i got the header modified, PnP head, 5 angle valvejob, milled .020, Portflow Valvetrain, Hondata IM gasket, and basically a tune up (cap, rotor, plugs, fuel filter) and Timging belt, water pump, and POS auto-tensioner.

my previous mods were AEM CAI, A'PEXi N1 catback, UR 3 piece pulley set, Crower stg2 cams, JUN cam gears, VAFC.

im using the stock cat right now, but am going to making a 2.5in test pipe, and get a SMS exhaust adapter then use an O2 simulator

 

Experimentation is fun.

One thing though, you did away with your flex pipe (I'm not crazy about them anyway) but you really need something. I'd recommend cutting off that funky 3 bolt flange, welding on a collector flange and then you can use a 2-1/2" donut for a flex joint, build your cat for that and then flange your B pipe after the cat. You will just have too much stress at the primary tube welds to the flange running a solid system with rubber engine mounts.

 

after doing this i hear a slight hissing sound...any ideas to what this is?

 

Maybe a leak somewhere?

 

Could be the turbulence at your new joint due to the mismatch of tubing IDs.

 

Is that new flange sealed? It looks like it was cut with construction paper scissors

Nice though, looks like you cleared up quite a bottleneck there.

 

yeah, it was welded from one side of the flange, and i made a gasket up for it where it mates to the Stock cat, this is all temporary till i have time take my car off the road to do the testpipe, and mod the B-pipe. The reason it looks kinda jagged is because it was a piece of 1/4 in thick steel. My cousin just used a torch to cut it . Took a shorter ammount of time then trying to drill or grind it out.

 

Thanks, it should be ok when i do the testpipe and mod the B-pipe then?

And where can i get my header coated. I saw my friend Pauls header that you made for his ITR (you met him somewhere in VA, and he picked it up). Is there any way i can send it to you to get coated? or do you recomend anyone to do it?

 

I use Airborn Coatings in Charlotte, NC.