1978 Side pipes

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Jan 3, 2022 | 02:45 PM

#61

jim-81

Drifting

Joined: Dec 2011

Posts: 1,743

Likes: 289

From: Chardon Ohio

Found my receipt in emails:

They are louder but much better sounding (in my opinion).

Jan 3, 2022 | 03:16 PM

#62

MelWff

Race Director

Joined: May 2006

Posts: 18,734

Likes: 2,582

Quote:

Originally Posted by jim-81

Found my receipt in emails:

They are louder but much better sounding (in my opinion).

Thanks, I see they also have a 2.5 louvered with wrap. I find it amazing nobody has done a decibel comparison of all the different types at idle and highway rpms.

Jan 4, 2022 | 07:31 PM

#63

augiedoggy

Le Mans Master

Joined: May 2007

Posts: 5,028

Likes: 1,120

From: North tonawanda NY

Quote:

Originally Posted by jim-81

Found my receipt in emails:

They are louder but much better sounding (in my opinion).

same here. I had the sweet thunder and the vette packs are a nice tone improvement.

Jan 7, 2022 | 03:12 PM

#64

Heus

Instructor

Joined: Jun 2015

Posts: 193

Likes: 34

From: Ohio

I put Dougs ceramic coated side headers on my former 78. Used the medium baffle. It sounded fantastic both with the stock L48 and also when I put in a crate engine. Was not too loud at all.

Jan 7, 2022 | 04:39 PM

#65

L-46man

Melting Slicks

Joined: Feb 2017

Posts: 3,232

Likes: 1,232

From: PHX AZ

78 automatics had 3.55 rear gears....look under the pumpkin at the last digits of the serial number stamped there...should end in OH

If you car seems to be unmolested....it'll be 3.55's

Additionally, 60 mph should be right about 2700 RPM on a straight/ flat road with steady throttle.

22 mph per 1000 RPM. (slush box) = 80% of production in 78

Unkahal

Jan 7, 2022 | 05:04 PM

#66

Heus

Instructor

Joined: Jun 2015

Posts: 193

Likes: 34

From: Ohio

Quote:

Originally Posted by L-46man

I've owned 2 78s and they were both 3.08s from the factory.

Jan 7, 2022 | 05:55 PM

#67

L-46man

Melting Slicks

Joined: Feb 2017

Posts: 3,232

Likes: 1,232

From: PHX AZ

They must have been manuals! 3.08 was optional.

NOT on automatics where it was mandatory.

Jan 7, 2022 | 05:59 PM

#68

Heus

Instructor

Joined: Jun 2015

Posts: 193

Likes: 34

From: Ohio

Quote:

Originally Posted by L-46man

They must have been manuals! 3.08 was optional.

NOT on automatics where it was mandatory.

Nope automatics. L-48s. I think maybe 3.55 was standard in L-82s and L48 California models.

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Jan 7, 2022 | 06:08 PM

#69

L-46man

Melting Slicks

Joined: Feb 2017

Posts: 3,232

Likes: 1,232

From: PHX AZ

Heus..I have the official CHEVY CORVETTE spec book... something is fishy here! Were they VERY LATE 78's...essentially 79's????? big difference in specs.

hmm fun sleuthing!

Unkahal

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