Re: my 85 urQ

[Bryan Gunn <bgunn@voicetek.com>]

Hi Anton,
 
> > >I'll tell you right now what you're going to see on the meter. The freq
>        >valve duty cycle is going to be about 30. 
> 
> Duty cycle is 69.90. This tells me the car is correcting a lean
> condition. I also did a high/low on it and it peaked around at over 90.
> After work I'll pull the anti-tampering plug and see if I can't bring
> those numbers into spec.

Doh! Sorry. You're right. I guessed the right amount in the wrong direction.
  
> This all seems like sound advice

It worked for me.
 
> >>I've had good luck with the Scorpion stuff. It fits real well, is really 
> >>well made (it's all T-304) and sounds like it flows well. I only have the
> >>Scorpion "front" piece w/resonator, and I love it. I'm going to get the
> >>rear piece soon. There's a comany called Prima Racing (I think) in the
> >>UK that sells Scorpion and takes MasterCard. I have to do the math, but 
> >>I think they are considerably less expensive from these guys than from
> >>TAP.
> 
> What I think I'll do about the exhaust is simply replace the center
> muffler with a pipe and a generic high flow muffler for the rear. This
> way I can retain the oem pipes.

I know a guy that did this and he didn't like it. It made the his car really
lound. This is why I made sure to get the scorpion piece with a resonator.
The sound level increased significantly with the resonator Scorpion piece
going into a stock baffled rear. When I get the scorpion rear, it's going 
to be at the threshold of what I can stand. With no resonator in the middle
piece and a free-flow rear, the car will be loud. The guy who did it this
way said his car set off car alarms when he went by. He installed a piece
with a resonator and was much happier. Having new boxes welded into the
stock pipes is a good, economical way to go, but I'd think twice about
not installing a resonator in that center piece. I'm pretty sure there's
another little box toward the front of the exhaust system that will make
a big performance improvement if you remove it...

-- 
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