Midyrman

Hello-

It's taken decades but I'm coming around to consider purchasing a ZR-1. The best driving day of my life included test driving a 1990 ZR-1 back in the late 1990s and I'll never forget it (and '66 L72).

What a car and what an engine!! Dark red and saddle.

Are there any negatives to the Flow Master exhaust? Too loud? Does it effect noise level in the cabin? Does it actually increase HP?

What about a Ligenfelter performance chip? Where is the performance gain? Entire rpm range? High end? Any negatives?

Thanks!

Tom

Goldcylon

Yes resonance at certain RPM ranges, But it depends on your setup if you are using cats, resonator, x pipe, straight exhaust etc. Yes a little maybe 7-10 Hp? However most exhaust gains occur with long tube headers.

Marc Haibeck or DRM is normally the performance chip of choice. Normally its tuned for WOT and the cooling fan coming on early however you can add power key on, CAGS skip shift delete and headers mods to the same chip. You should join us over at the zr1registry.net. No negatives there either,

billschroeder5842

GC is on target. I have a Haibeck chip and am thrilled with the performance. I swapped the resonator (a must for a 90) for a Magnaflow X pipe and kept the stock muffs on my 91... Zero drone.

Most of the ZR1 guys bounce between ZR1.net and CF so we share our crazy equally.

FASTAZU

All I can add is if you can find the original Flowmaster set-up made for the ZR-1 it has no resonance even with headers, and is very mild at speed.

http://www.zr1specialist.com/

zr1eddy

I have a '90 Z and I have been interested in the ZR-1 Flowmaster exhaust. I have only been able to hear it on the internet, We Gone had a good sound clip of his Z with the Flowmaster. I was lucky to find a new ZR-1 Flowmaster exhaust without the mufflers, so exhaust pipes and resonator only. I plan on completing the system with Flowmaster Series 50 Delta Flows and headers. It will all be a surprise when its complete as to how it will sound, but most people that are familiar with this system only have good things to say about it, so fingers crossed. I will also be adding a Haibeck chip.

FASTAZU

Stock with just chip and catback


The Flowmasters are on the 93 now


Corsa on the 91 with headers cats and full P&P.

FU

That first (top) car sounds nice ! Dare I ask if it's a stocker ? Runs out well !

FASTAZU

Yes both vids the same 91, The top vid was done about 8-10 years ago when all I had done was catback and Marc's chip everything else stock.

lower is with Corsa and Marc's 510HP package done a few years back.