I guess I should have asked this before.. but I ordered a 3" exhaust cut out that goes just before the cat. should be good for those quiet country roads! anyone know if opening the cut out makes any noticeable differance? also should the cut out part be pointing down? I know there's a plate just above my cat for heat..


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'88 C1500 350 TBI
Belltech 2/4 Drop,
Nitro Drop Shocks,
3.73 Rear gear ratio,
Edelbrock performer TBI intake, performer cam, timing chain,
Hiflow cat with Rhino dual 2 1/2" out the rear. American Racing Neptune 16x8 wheels with Kumho 712's, 255-50 series

 

uh oh...i can see this one getting moved pretty quickly....

i think it depeneds a lot on your current exhaust setup. do you have a pretty restricitve cat-back? the more restrictive it is, the better your gains will be from the cutout.

-brian

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1991 Camaro RS
GMPP 350 HO crate engine w/TBI
Homepage z28boy@twcny.rr.com AIM - "Z28 Boy"

 

going to exaust board...

 

I wouldn't put it pointing down, what if you go over a speed bump or something similar, it might snag on something and really mess things up. I would have it facing out towards the passenger side.

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2 Tickets to game= $250
Gas= $20
Sitting 20ft. from MJ= Priceless
'86 IROC T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK HEADERS Hooker CatBack
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite

 

Excuse my lameness, what exactly is a cut out?

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1988 Jet Black IROC
5.7L W/ 64000 miles
Flowmaster Exhaust
Fully Loaded
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My IROC In Readers Rides
My IROC
Listen To The Exhaust!

 

A small y shaped pipe that goes before your cat and diverts the exhaust the open side of the pipe. You can also get the in electronic versions so you dont have to worry about unbolting it

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*1989 RS
*Red, Daytona Turbo fiberglass hood, chrome 16x8 IROC wheels
*355 CID
*TPI ported plenum, SLP siamesed runners, Edelbrock high flow intake
*SLP 1 and 3/4 headers with 3 inch catback
*Richmond 3.73, Auburn Posi
*Modded 700-R4, 2800 stall converter
*eibach pro kit and hotchkis strut tower brace

"There is no way you have a 350 in that car. They are made to have 305's and a 350 wouldnt fit"
-local parts store genius-

 

Hey, when you put that cutout in and open it up IT"S GONNA BE LOUD AS SH*T!!! You will get pulled over if you run it open all the time, make no mistake. However... a neat little trick to relieve some of that backpressure without all the noise for city driving is (if the cutout opens by removing a plate w/ wingnuts on it) run it with a nickle wedged in the plate to keep it open a little.

 

They might sound good when open (which u can't do everywhere) but when they are closed they must not be good for flow at all and direct some of the exhaust into the other pipe. Correct??

 

yea it probably creates a bit of extra back pressure when it's closed, but who cares? just make sure to open it when you plan to race.

A friend of mine has a cutout on his 95 Z28 and it's suprisingly quiet. I mean obviously it's very loud, but nothing like open headers, it sounds great and the only time police would notice is if your running at WOT with it open. but if the cops catch you doing that, noise pollution isn't going your biggest ticket

 

I wouldn't want a restriction on the street, what I run on the track is what I want to run on the street.

 

Exactly, unless you get the cable operated kind so you can open it from inside. But I've heard mixed reviews on those kind.

 

What kind of mixed reviews have you heard about the electric kind??

Jon

 

haha, who needs a cut out, I just unbolted my intermediate pipe lol And since my engien sucks A$$, its not amazingly loud, so I wont get pulled over, and also it s a 305, prolyl soudn louder on a stock 350.

 

Something about the cable breaking or melting, something like that. I had bought the non electric pull cable once, before my cat-back, but it's made of cast iron which has to be brazed on plus it only fits up to 2 1/4 piping.

 

"haha, who needs a cut out, I just unbolted my intermediate pipe lol"

LOL

 

After I had my motor installed the guy didn't tighten the I pipe clamp. I punched the gas and pulled onto the highway, all of a sudden there was this loud as he!! noise. I thought oh crap, I broke something. After looking under the hood, I looked under the car, I was like cool, open headers. I drove home and put it back on. Before I had it welded on, one day leaving work I pulled it off the y-pipe and drove home. As I turned into my street I passed this rice burner, and I just had to throw a rev. That's why I had bought the cut out.