Driver impressions from those who did some porting please

[billschroeder5842]

So, (insert strong opinions here) for a header back exhaust what is everyone's experiences? I read, read with more reading with the conclusion being that Corsa is the one to have coupled with either Henderson headers or SW.

I Like a bit of rumble and burble on deceleration but drone is a super no-no. Plus, I want the idle to sound "Corvette" and not 69 Hemi Super Bee.

I listen on you tube and Borla sounds more what I like(ish) but the drone has me

I kind of like cars that are a "sleeper" in presentation.

[Kevin]

corsas are they way to go if you like the sound. It's grown on me

[efnfast]

You really have to come to Bowling Green and listen to some cars to decide.
I have ceramic coated OBX headers and OBX exhaust. Very happy with it.

[Paul Workman]

Originally Posted by RussMcB

My rule of thumb is, if you floor it more than once in a while (and for more than a second), and then think, I don't have enough HP, then maybe consider spending money (thousands of dollars).

I have (non ZR-1) friends that never see redline yet think they need to buy go-fast goodies.

Boy...ain't THAT the truth! Approx. 40% of ZR-1 owners too, according to a now old poll, have never got much above 6000, if that.

[dredgeguy]

Originally Posted by billschroeder5842

So, (insert strong opinions here) for a header back exhaust what is everyone's experiences? I read, read with more reading with the conclusion being that Corsa is the one to have coupled with either Henderson headers or SW.

I Like a bit of rumble and burble on deceleration but drone is a super no-no. Plus, I want the idle to sound "Corvette" and not 69 Hemi Super Bee.

I listen on you tube and Borla sounds more what I like(ish) but the drone has me

I kind of like cars that are a "sleeper" in presentation.

I have SW headers with their high flow cats and Corsa. Love the sound when you get about 3000 RPM and up. No drone and no stink.

[randy ransome]

Originally Posted by Paul Workman

Boy...ain't THAT the truth! Approx. 40% of ZR-1 owners too, according to a now old poll, have never got much above 6000, if that.

Every time I leave the house in my Z I go past 6 grand several times before the day is over...I thought that's what these car were for, Fun.

[Gunny]

Originally Posted by billschroeder5842

I kind of like cars that are a "sleeper" in presentation.

For the "sleeper" idea, consider this ...
4:10, porting, headers, and late C4 stock exhaust with electric cutouts. Try to locate a 95 stock ZR-1 exhaust or a 96 LT4 exhaust. Install a pair of QTP electric cutouts just ahead of the muffler inlet. The cutouts are controlled by a switch located to your convenience. Totally open it's very close to running open headers - totally closed it's almost stock sounding (headers add a nice touch) - partially opened to taste, you can pick the sound that you like. Drone is only present when you open more than half-way.

I've had the stock system on my 90, 2.5" Borlas, 2.75 Borla Challengers, Corsas, stock 95 exhaust, and finally the stock 96 LT4 w/cut outs, SW headers, and porting by Marc.

Highly recommended: listen to & ride or drive as many Z's with different setups before you start modding your exhaust ... it will save time & money in the long run.

[Paul Workman]

Here's mine idling, fully ported w/ stock cams...

https://www.youtube.com/watch?v=y1YFa8ruh8A

Below is my stock 90 ZR-1 (RED) and the fully ported version (BLUE)- as you see it in the video (above).

.

[32valvesftw]

Bill, I am running Bolas, Henderson headers, no cats, and an X pipe in place of resonator. It is loud and has that BRAAAAP on acceleration, but it does drone in 6th at legal speeds. I do not know if mine is ported, I doubt it, but after Corey did the headers she dynoed at 383 WHP. Drop me a line if you are close by Houston and swing by and you can hear it in person. I personally do not get the full experience from youtube, To me it's kinda like trying running a brothel with pictures!

[jss06c6]

Bill,

You rode in my '91 in Buffalo, Tx at our last gathering. 100% Stainless Works headers to exhaust tips. I do have drone at 1800 RPM, gone by 1900 RPM. Exhaust note is great. I'm about to port a plenum and injector housings, then port match the heads and retune (my tune). Currently #473 is putting down 359, 350 at the wheels with only headers and tune.. will let you know what I find with the top end porting on my '91.

Sent from my QTAIR7 using ZR-1 Net Registry mobile app