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Old 08-24-2011, 12:30 PM   #1
LonghornCutlass

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Default 1979 Olds 350 gas engine

How much horsepower would the 1979 Olds 350 gas engine that went into Delta 88s have? I am considering buying a coupe and it has the 350 gas engine in it. Hooked to I assume a TurboHydramatic 350 tranny. The shift quadrant shows P R N D S L. Thanks, Michael

Last edited by LonghornCutlass : 08-24-2011 at 12:35 PM.
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Old 08-24-2011, 12:34 PM   #2
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Default Re: 1979 Olds 350 gas engine

150-180HP, not what you would call a performance engine, but for a daily driver would be OK. They have the worst flowing heads Olds ever made, and the same type windowed block like the 403's. For performance youre better off with the 403.
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Old 08-24-2011, 12:42 PM   #3
LonghornCutlass

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Default Re: 1979 Olds 350 gas engine

70W-32, thanks. I thought it was in that range of HP. But this would just be for weekend cruising, not performance driving. I've always liked the looks of the '77 - '79 Delta 88 coupes.
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Old 08-24-2011, 01:02 PM   #4
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Default Re: 1979 Olds 350 gas engine

The specs as I know them to be are 170 HP@3800 and 275 ft/lbs of torque @ 2000. Those numbers, while not impressive, can be greatly improved with just a decent exhaust system and a good tune.
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Botched Olds 350 build by the crooks at Rocket Racing. Lunati 207/213 Voodoo cam, 8.1:1 CR ( was supposed to be 8.8:1 ), Stock #7 heads ( was charged for work that was never done and what was done was done wrong ), American Racing headers, Performer RPM intake, Qjet with 1/2" 4 hole spacer, 2.5" Pypes X-pipe system, cowl induction scoop.

Engine never ran the way it was supposed to from day one due to Rocket Racing's negligence. John Stolpa refuses to contact me about it.
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Old 08-24-2011, 01:39 PM   #5
LonghornCutlass

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Default Re: 1979 Olds 350 gas engine

Thanks, DoubleV
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Old 08-24-2011, 01:42 PM   #6
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Default Re: 1979 Olds 350 gas engine

As with any late 70's vehicles, changing to dual exhaust and swapping the gear ratio into the high 2 ratio(2.93) to low 3 ratio(3.08-3.23) will increase performance without having to break the engine open.
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Old 08-24-2011, 02:02 PM   #7
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Default Re: 1979 Olds 350 gas engine

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Originally Posted by 70W-32 View Post
As with any late 70's vehicles, changing to dual exhaust and swapping the gear ratio into the high 2 ratio(2.93) to low 3 ratio(3.08-3.23) will increase performance without having to break the engine open.
Yea, and goodbye gas mileage
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Old 08-24-2011, 02:06 PM   #8
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Default Re: 1979 Olds 350 gas engine

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Originally Posted by kevinkpk View Post
Yea, and goodbye gas mileage
So, with those changes, put a 200-4R in it too, bang! Gas mileage back!
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Old 08-24-2011, 02:14 PM   #9
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Default Re: 1979 Olds 350 gas engine

The dual exhausts will help both the mileage & performance. Those 1970's pellet converters are brutal.
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Old 08-24-2011, 05:38 PM   #10
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Default Re: 1979 Olds 350 gas engine

I'm partial to the 77-79 Delta Coupes...

In fact, my 78 is my daily driver.

Power and Ooomph, well, not quite there. But I have a set of heads, got an intake, and slowly hunting a 403 to drop back in 'er...
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Old 08-24-2011, 06:18 PM   #11
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Default Re: 1979 Olds 350 gas engine

Those motors can be decent if its in good shape, if the slugs and jugs are in good shape, I say swap a set of earlier heads, it will up your compression to around 9:1 and add a decent cam and you should have a good street motor with lots of fun potential
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Old 08-24-2011, 09:05 PM   #12
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Default 1979 Olds 350 gas engine

Put in a switch pitch TH400, and you can keep your gas mileage + super
ruggedness. Certainly change the exhaust. My 77 Delta (driven daily
coast to coast) with 2.41 axle & stock 403 measured 0-60 in 7.5 sec,
91 mpg 1/4 mile on a VC2000. On 87 octane. Bruce Roe
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Old 08-25-2011, 06:05 AM   #13
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Default Re: 1979 Olds 350 gas engine

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Originally Posted by bcroe View Post
Put in a switch pitch TH400, and you can keep your gas mileage + super
ruggedness. Certainly change the exhaust. My 77 Delta (driven daily
coast to coast) with 2.41 axle & stock 403 measured 0-60 in 7.5 sec,
91 mpg 1/4 mile on a VC2000. On 87 octane. Bruce Roe
Bruce, hope you meant MPH?
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Old 08-25-2011, 10:41 AM   #14
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Default Re: 1979 Olds 350 gas engine

Lol yeah mike me to. If not can I get that much out of a big block.
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Last edited by Capo's Olds : 08-25-2011 at 10:44 AM. Reason: changed response
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Old 08-25-2011, 12:19 PM   #15
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Default Re: 1979 Olds 350 gas engine

Yeah, those '77 to '79 GM full-sizers were really very solid, well-made cars for the most part. Thanks for all the information!
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Old 08-25-2011, 01:20 PM   #16
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Default Re: 1979 Olds 350 gas engine

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Originally Posted by mike's88 View Post
Bruce, hope you meant MPH?
Yes, 91 mph, thank you. Not much of a race car, but quite
acceptable for stock parts which will easily see the far side
of 300,000 miles. Bruce
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Old 09-04-2011, 12:23 AM   #17
dadmoonbunny

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Default Re: 1979 Olds 350 gas engine

I don't know what you guys mean. My engine, other than the timing chain, is al original, with over 200K on it, and I beat that girl to high heaven. I AM A LEADFOOT! I haven't broken it yet, and don't think I will.

By the way, will headers for a 403 fit the 350 in my installation?
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Old 09-04-2011, 05:32 AM   #18
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Default Re: 1979 Olds 350 gas engine

Quote:
By the way, will headers for a 403 fit the 350 in my installation?
Yes, they are identical dimension wise.
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