455 from 72 Olds 98 HP?
#1
455 from 72 Olds 98 HP?
Anyone have an idea how to tell how much HP this engine came with stock? Its from a '72 Olds 98, but thats all I know. It has GA heads. Here is a pic of the carb, not sure if that will help.
#3
#4
1972 Olds 98 w/STANDARD 455 4bbl (L74) & single exhaust was rated at 225hp net.
if dual exhaust was OPTIONAL on the 98?? same engine (L74) was rated at 250hp net.
if dual exhaust was OPTIONAL on the 98?? same engine (L74) was rated at 250hp net.
Last edited by hurst68olds; April 20th, 2013 at 12:19 AM. Reason: additional info
#5
Go to http://www.google.com, type "1972 olds 455 horsepower" into the little window, press the "Return" key, and click on the link that says, "1972 OLDSMOBILE “SPECS” BOOK - Wild About Cars."
Standard engine for a 98 was the L74, which was rated at 225HP @ 3600 RPM if it had single exhaust.
- Eric
#6
#7
My dad had a 71' 98, and was rated for 320 gross hp, and figures to about 250 net hp. Think 72' was the same, but did fall to 225 net hp in following years. Don't know what happened in years when cat converters came in, but surely not good. Add in, these later cars where further choked down by 2.56 rear axles, ext. As I recall, low end torque saved the day on my dads 71', and thing really moved.
#8
Do you really have Ga heads on this engine? Because those heads ONLY came on a 1972 W30 car. Also you have the spring holder tab fastened with the upper valve cover bolt used to hold down the Outside Air Induction foam ringed Air Cleaner cover.
#9
In my "Motor" auto repair manual 1976 edition. It has 5 versions of the 1972 455. All net hp, 225, 250, 265, 270 and 300. All 8.50 compression ratio and all 4 barrels. My 1971 Delta was a 455 2V@ 8.10 C/R rated @ 185 hp.
#10
I think the answer is GA.
W-30s got large valves in the GA casting.
Last edited by Fun71; October 11th, 2017 at 01:21 PM.
#11
Ga heads
You have been misinformed. All 1972 455s use a version of the Ga heads.
#12
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