Low Compression 455
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Joined: Feb 2013
Posts: 15,394
From: Phoenix, AZ
Oh yes. My car presently has 3.23 gears and it’s not quite as peppy as the 3.55s were. Those would chirp the tires on shift to 2nd gear at 20 MPH with moderate throttle. Going WOT at 60 forced a downshift to 2nd then chirped on the upshift to 3rd.
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Joined: Sep 2013
Posts: 2,924
Yes, terrible wasnt it. As far as I can tell the 75 H/O was one of the most option laden Oldsmobiles in history upon its release, whether by availability or out the door. Yet could only be had with a 2.56 rear. Nothing crazy just a moderate move to a 3.08 would of been a world of difference. And still a silky smooth ride.
Sorry Andrew did not mean to discourage you. Information overload, I am an Olds guy since the mid 80s and a numbers addict, didn't mean to do that. Throw in a few 100 passes at the track over the years and I can get carried away ...
But getting familiar with what you already have and proceeding slowly is a good way to go. Your ride came with 370 lb ft of torque that is a lot of fun on the street as is.
Sorry Andrew did not mean to discourage you. Information overload, I am an Olds guy since the mid 80s and a numbers addict, didn't mean to do that. Throw in a few 100 passes at the track over the years and I can get carried away ...
But getting familiar with what you already have and proceeding slowly is a good way to go. Your ride came with 370 lb ft of torque that is a lot of fun on the street as is.
all you do is spout off crap from years ago …you need a time out 😂😂😂😂
let this guy learn and have fun doing his first Olds engine…he seems to have the basics figured out.
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Joined: Aug 2019
Posts: 2,085
😂 Yes. I feel like an old soul as well. You have no idea how much stuff I write up and never post... Precisely because I think I am over doing it...
Last edited by 69CSHC; Jul 28, 2024 at 05:07 PM. Reason: spelling
Thread Starter
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Joined: Dec 2016
Posts: 74
I'm thinking of going with 3.23 gears too, seems like the best all around, I don't do lots of highspeed freeway driving but I live in a mountainous region, would the engine be screaming in inclines or is it good?
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Joined: Dec 2014
Posts: 16,688
My car has the same gearset and it seems like the best all-around compromise. At highway speeds (75 MPH-plus) sometimes you wonder when it's gonna shift into overdrive, but you get used to it. Around town it's just fine.
Registered User
Joined: Sep 2017
Posts: 5,215
From: St. Paul Minnesota
....Just my two cents worth.
Out of Line, Everytime😉
Joined: Dec 2006
Posts: 10,082
From: Melville, Saskatchewan
What size rear tires and what speed do you drive on the highway? If it is fairly short trip's, not an issue. If it is many hours, consider a full overhaul with proper bearing clearance, which is an argument in itself. Consider Procomp heads over your crappy J heads. Smaller ports and valves than the current Edelbrock heads, just get quality components installed in them. As said, a quality 2500 stall is good choice unless you go wild on the cam.
Thread Starter
Registered User
Joined: Dec 2016
Posts: 74
What size rear tires and what speed do you drive on the highway? If it is fairly short trip's, not an issue. If it is many hours, consider a full overhaul with proper bearing clearance, which is an argument in itself. Consider Procomp heads over your crappy J heads. Smaller ports and valves than the current Edelbrock heads, just get quality components installed in them. As said, a quality 2500 stall is good choice unless you go wild on the cam.
1972 Cutlass Town Sedan
Joined: Jun 2018
Posts: 694
From: Sarnia, Ontario, Canada
245/60/14 tires or 245/60/15 if i could find some 15' SSII. I would rarely go over 60mph and not more than an hour or hour and a half highways at most. I will swap the J heads sooner or later but I haven't really considered the procomps as they are chinese made, how well do they compare with the edelbrock heads knowing that they are half their price?
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Joined: Nov 2008
Posts: 8,477
From: Central Fl
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