sublimerx7

hi i just finished installing a rb streetable header on my car although i have kept my cat on the system and now it seems like all it did was make my car louder and slower? i am confused? does the 02 sensor need special wire or something cuz i used regulare wire to hook it up? would that cause a prob? thanx alot brandon
87 gxl

marcus219

I noticed MUCH more top end....you sure your 6 ports are still working?

Capn' Wankel

Your catalytic converters may be clogged if they are stock.

marcus219

02 sensor doesnt need special wiring...just try and match the guage of the wire you add...that would just make you run rich at idle...

YearsOfDecay

Freeing up the exhaust system on a pre 89 6-port system will most likely cause the 6-ports not to function because they are operted by backpressure from the exhaust... get somebody to rev 'er up to about 6k and poke yer head under the hood and see ifn' they open as he's revving 'er up... if not... then you're gonna have to either wire 'em open and lose your low end... or buy a summit racing rpm switch, a solenoid valve, some vaccume line and push an air line tap into the plumbing from your air pump run that to the solenoid, then split it after the solenoid to each six port actuator to get the pressure needed to open them......

marcus219

Hes still running a cat....6 ports should have more than enough pressure. You can run the rb header, the pre-silecner with has a feed tube for the 6 ports and its enough get the actuators to move.

marcus219

Thats all with NO cat by the way..

Crionics

That's not necessarily true. I thought the same thing, had someone rev my car twice while I looked at each actuator. Neither opened. I put a dab of grease on each one from someone else's advice, and drove it around. Both opened.

Also, some poeple have had their 6ports open with gutted cats, for what that's worth.

marcus219

Now if you run with the stock manifold and no cats..I've seen it stop acutators from opening ports...the header flows much more so actually will give more pessure.

YearsOfDecay

yeah.. it all depends on you car... as we know.. our girls are alll different!!! I'm just one for mechanical override!!!! I hate depending on exhaust pressure.. to many variables...(leaks, backpressure, forgot to hook it up!!) I want it to work exactly when I want it to!!!!!!! LOL

I actually designed an electric solenoid system to open the things once and cut the air pressure equasion out all together.. but then, i had access to a machine shop to get the brackets made to install the solenoids in place of the air operated actuators, don't have that luxury now!! but.... someone out there should take that idea and make a kit..... hey, maybe i should!!!!

sublimerx7

thanx alot guys i shall try to oil up my actuators, i halfway figured it had something to do with them. im goin to the track tomarro anything else i can do to help?
i have cone filter rb header and cat back and some driving skills any ideas of what i should be runnin?
thanx again fo da help

marcus219

High 15's if your lucky....low 16's....n/a's arent to quick in the 1/4 w/out some serious engine work.

I'm done with the N/A...boost, here I come!

YearsOfDecay

at the track I run around 15.1, but i have an '89, little more power... if you don't have a fresh air headlight cover... you can do one of two things to get colder air into your intake at the trak... 1) remove the passenger side headlight skin... 2, pull your headlight motor relay out and manually (by the little thing underneath the car crank up your passenger side headlight about an inch which will let air in between the back of the headlight and the hood.. but you have to remove the gasket on the front of the hood for that to work.. I averaged about 2 tenths better ET's after i got cold air into the box!!

marcus219

15.1 with no porting? How many miles on your engine? Just the mods in your sig I take it? Stock is like 16.1 or 16.3 or something....

marcus219

I wonder what I would run with my setup....probably nothing to satisy me, It'd be cool to know though. I need to go to track on a test and tune just to see.

marcus219

To some more N/A guys with non ignorant responses...is it desirable to just run off the header at the track, I'm running the RB. My ports are wired open right now so that wouldnt be a factor.....seems like it'd give you the best power exhaust wise. Whos ran with my similiar setup, no engine porting (not meaning manifold)??

sublimerx7

ill get back to yall with timeslips thanx for advice

Capn' Wankel

Decay you make a kit and I will buy one.