GRAND PRIX 79 Grand Prix Resurrection

[CDUNIGAN1981]

Unless the 2004R is built with a billet forward drum and welded on shaft, it won't live behind your torque.

Stage 2 from extreme automatics is currently in the lead. Spoke to Lonnie today

Honestly... I can't hardly believe Im considering such a price tag

I gave $1150 for the car as a Junior in HS

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[CDUNIGAN1981]

This tread is a nutshell summary of everything I have heard about Poncho motors and 200-4r's
https://gbodyforum.com/threads/can-a-200-4r-survive-a-worked-pontiac-400.51426/page-2
Each day I creep a littler closer to pulling this trigger.

Once I work out the transmission swap, I need to decide on exhaust.

Currently I have RamAir manifolds, 2" torgue tech pipes, 40 series Flows ending at axle

I'm have a pair of Maddog headers

1. Anyone with similar setup use a catalog system?
2. Opinions on muffler choice and sound impact

I have never had tail pipes on it so I'm curious what 3" 40 Series Flows with sound behind these headers if the sound exited from so much farther back.
It is crazy loud as it is... It is hard to shop for mufflers without trying each out individually until you dig the sound

Thanks for the input... this place is pretty cool

 

[fleming442]

I'd go with a minimum 2.5" mandrel bent kit.
it's been fairly well known that Flowmasters are contradictory to their name (don't flow as well as they sound), and drone ridiculously. I'm more partial to the perforated tube, straight through design like a Pypes, Borla, or Magnaflow. I actually have all 3 on different vehicles.

 

[olds307 and 403]

I'd go with a minimum 2.5" mandrel bent kit.
it's been fairly well known that Flowmasters are contradictory to their name (don't flow as well as they sound), and drone ridiculously. I'm more partial to the perforated tube, straight through design like a Pypes, Borla, or Magnaflow. I actually have all 3 on different vehicles.

Which ones do you like the best? Especially curious about the Olds v8. Sorry to hijack.

 

[olds307 and 403]

I have shorty headers, custom 2.5" dual down pipes into a compact X pipe into dual 2.5" pipes that exit behind the wheels. With the Aerochamber mufflers, it sounds amazing on my 88 Cutlass, just loud enough and the right tone. I tried moving it to my 70 Cutlass. Loud and droning without the same tone. I moved it back to the 88.

 

[78GP400]

You may want to call Vince Janis from Janis Transmission in Akron, Ohio. He has been building 2004rs for many years for the turbo Buick crowd. He builds all of Lorenz racing turbo Buick’s which are all serious builds. Pretty reasonable too. I got mine through him and it’s been great!
I have the Maddog Headers with 3 inch pipes to Borla mufflers. Loud when your into it but otherwise pretty reasonable. Low to no drone.
Pretty cool build! Keep it up!

 

[CDUNIGAN1981]

You may want to call Vince Janis from Janis Transmission in Akron, Ohio. He has been building 2004rs for many years for the turbo Buick crowd. He builds all of Lorenz racing turbo Buick’s which are all serious builds. Pretty reasonable too. I got mine through him and it’s been great!
I have the Maddog Headers with 3 inch pipes to Borla mufflers. Loud when your into it but otherwise pretty reasonable. Low to no drone.
Pretty cool build! Keep it up!

Your exhaust is wonderful... it a shame it has to be on the underside of the car.
I'm going to look into Janis

 

[gnvair]

You may want to call Vince Janis from Janis Transmission in Akron, Ohio. He has been building 2004rs for many years for the turbo Buick crowd. He builds all of Lorenz racing turbo Buick’s which are all serious builds. Pretty reasonable too. I got mine through him and it’s been great!
I have the Maddog Headers with 3 inch pipes to Borla mufflers. Loud when your into it but otherwise pretty reasonable. Low to no drone.
Pretty cool build! Keep it up!

Lonnie Diers also is well known in the Buick world and has quite a few of his 200 4r's in 9 second cars.

 

[gnvair]

I have Magnaflows in my Grand National and Dynomax Ultraflow stainless (welded case) on my Malibu and my turbo Corvair.

 

[CDUNIGAN1981]

Anyone have American Racing Headers exhaust system?

Its $1100 without mufflers which is about twice as much as pypes

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