Forums

Greetings form Peru justa wan to  share my new preservation project with the community. it's a legitimate 1991 OLSDMOBILE CUTLASS SUPREME INTERNATIONAL SERIES COUPE ( X-Code 3.4L DOHC TWIN Dual Cam) with only 25,857 original miles    Here is a crazy part of its history: Someone in the past installed a 3rd-generation LPG system on it, which caused it to stop running back in the day. Because of that mistake, the car was left sitting for decades, sleeping like a time capsule! A blessing in disguise for me. Everything from the LPG system has been removed from the engine bay, except for the 16-gallon tank in the trunk and the exterior filler valve, which I will remove and patch later. The great news is that the engine is finally up and running again, and it sounds great! The interior is full Burgundy leather with the premium AQ9 bucket seats, and the green digital cluster works perfectly. Right now, I'm doing a complete brake overhaul (the front calipers were seized) and getting ready for a full fluid flush. New water pump and mechanical thermostat are going in next. My approach is mechanics first: make it move, shift, and brake safely, then deal with the bodywork. Glad to be here, and I'd love to hear your thoughts, technical tips, and recommendations for bringing this 90s unicorn back to life! WhatsApp Video 2026-.mp4 WhatsApp Video 2026-06-28 .mp4

Probably just due to manufacturing issues or Chevy didn't have a need for a car that sized right away in 1988. There were no sedans in 1988 only coupes. Sedans started in 1990 so that might have something to do with it. GM had a lot of issues getting production going with these cars back then. Doraville, GA is where the Cutlass Supreme and later the Lumina in 1990 were assembled. There was a massive retooling going on and there were issues on the line. These cars were all new and GM already put billions into getting these cars built.  GM did have the Beretta at the time, so the need for another coupe in 1988 probably wasn't too high on the list.   

Do we know why the Lumina took 2 extra years to get to market? I don't think they mentioned Chevy once in this video. Come to think of it, the Lumina was treated very differently from the other Ws. Last one on the market, first one to get a generational overhaul, and the last "first" gen to be discontinued.

There's surprisingly very little drone, and it's only really noticeable at idle and light acceleration. That said, every ls4 with modified exhaust has this same dumpy bassy tone to it. I attribute a lot of it to the crappy exhaust manifolds, as headers sound ok ok them.

The larger the dia of the pipe the deeper the tone of the drone. In my opinion anything from Magnaflow or Borla will have a considerable amount of *throat* to them. I personally like to be able to hear the radio at something a little over a whisper.....