https://www.facebook.com/marketplace/item/400222322617351/ non numbers Guy has a couple others including a numbers 72 and a brown and red vert
FYI, Silver Mist was the 8th most popular color in 1970 out of 21 available colors. (Actually about 15 regular production colors and 6 special order colors)
It’s Harrison Ortis… he has quite a collection.. he had that twin supercharged GSX at the Nats last year or the year before…?
I have a '70 GS with the same color options, Silver Mist (14) with black vinyl top (B) and black bucket seat interior (188). However, my car has the standard 455 instead of the Stage 1 engine.
Question LSMS. I too have a standard 455/350HP engine. However, when engine was rebuilt (by Buick Restorer) engine builder had upgraded several engine parts. Comp Cam, dual valve springs, machined heads for the larger Stage 1 Valves. I added a Holley Carb because I couldn't find but junk Chinese Qjets that were bad right out of the box. This is my first Buick BB. Just wondering, is your standard 455 pure stock? I ask because when I bought my car 2+ years ago, it had all kinds of engine problems and I just got it out of the shop (had other upgrades done to the Buick, i.e. interior & console floor shifter). My engine now runs good but I'm curious about how a standard 455 runs. Does your engine have a lot of power to it? I noticed that the standard and Stage 1 engines have the same Touque ratings. That's interesting for sure and only 10 HP difference between the 2 engines. The one thing that holds my car back is it has a highway diff, 2.93, but it is a posi. I assume you have a 2.93 diff because this is the standard diff for the standard engine. Sorry for rambling on, I just haven't met anybody on this forum that has a standard 455 that hasn't been modified. One of the major problems I had with this engine being modified (may also have KB high compression pistons) is it ran very hot, had to put in an aluminum radiator, TA's high performance water pump and new clutch fan to cure this problem. Just wondering how much of a performance difference there is between a Standard and Stage 1 engine. Not much info online regarding a standard engine performance. Vet (Navy)
My car is completely stock and original. It runs well but is by no means a screamer. I have never taken it to the track, but I would guess that it could run low 14s with good traction. I have never checked the rear end ratio. I have the POP card and it lists the rear end code as OK, which does not show to be a valid code for the 70 GS. Regarding your rear gear, I wouldn't be overly concerned about it. Back in the 1980s I had a GS with a healthy built motor and a 3.08 rear end. I raced that car often with a best time of 12.58 in the 1/4 mile. With the torque of the Buick motor, the low gear mostly served to help my car when street racing. I almost always won out of the hole because I wasn't spinning the tires.
Just my 2cents for what it is worth Keep the 2.93 in your Gs 455 specially if you have A/C in your car Here is a question for you.How many times do you plan on racing your car?1/4 mile The tork on the regular 455 is all in by 2800 rpm while the stage1 is all in a little later restored one of each Gs 455 was more fun Alain platinum 442 4spd factory A/C
T 2 years, 3 years… I was close… lol. Didn’t you pick up a bunch of parts for me from him years ago???
Just to give a perspective between the two HP ratings, Buick rated the ‘70 455 engines at 350 in the GS and 370 in the Electra and Riviera. Same engine! And the Stage 1 engine rated at 360 HP was factored by the NHRA to, I believe, 400 HP. Some believe it was closer to 425. With those numbers in mind it’s easier to see why the Stage 1 would turn the 1/4 in the mid 13s while the standard 455 was a low 14 performer. I have owned and raced both versions and a 5 mph, 1/2 second difference is very common.
Thank you, appreic Thank you, appreciate your response and info. On my build sheet, I also have ok listed on axle. The research I have done says it's a 2.93 open differential. I even it stamped on the axle tube. Vet
I do have A/C. Didn't know the torque in a base 455 came in at a lower rpm range. It does have good torque, when I shift to 2nd it chirps the tires. I don't plan on taking it to the track, a little blast on the streets on occasions. Thank you for the info. Vet
Thank you for this info. It always amazes me on how much more HP it takes to run a 1/2 a second faster. Vet
I have read Mr. Manner's 376 hp rating on the Stage 1 several times over the years. I believe him 100%. This is what gets to me. How does a Buick Stage 1 beat all the higher horsepower Chevy's (450hp) MoPars (425 hp)??? It's more than just torque. GM has a habit of underrating and overrating HP outputs. Insurance issue, maybe, Performance advertising, maybe. Taking with a friend of mine in the Performance building HP world. He told me that Dyno testing between different Dyno models (manufactures) can give you very different results on hp & Touque. I'm not talking about Chassis verses Engine Dyno's. I have been looking for years hoping to find someone who has Dyno'ed a pure stock Stage 1. I would love to see the hp & Torque numbers and what rpm's full torque comes in at. Haven't found one yet, all 455's that I have seen on a Dyno (engine Dyno) have some type of power adders. I saw a mild modified Riv 455 on a Dyno and it couldn't make the 510 Torque rating and needed a lot of tuning to get the 370hp rating with help of power adders. The torque came in at a lot higher than advertised. What was interesting, the tuner was able to get the hp up to 400hp. He milled the heads to get higher compression. The Riv 455 was newly rebuilt engine only managed to obtain 150 lbs cylinder pressure. The tuner wanted 180 lbs but only got 170 by milling the heads. He didn't say what type of pistons were in the engine. It had a Qjet carb but didn't say if it was a 750 or 800 cfm. He didn't say what year the engine is. Lots of info left out of this Dyno run. I copied this information, it's interesting to me. In summary, dyno numbers can vary due to drivetrain losses, atmospheric conditions, and the specific type of dyno used. Understanding these factors helps enthusiasts interpret dyno results more accurately. Why you shouldn't trust Dyno numbers. Dynamometers are used all the time to measure power output for cars. The standard estimate for comparing wheel horsepower (the number retrieved from the dyno) to crank horsepower (the manufacturer's claimed number) is a 15 percent difference. But as a real engineer explains, that's not really what dynos should be used for, as the numbers aren't always accurate. Excellent article: https://hips.hearstapps.com/roa.h-c...-gtr.gif?crop=1.00xw:1.00xh;0,0&resize=1200:*
While I can't attest to its 100% accuracy, I did download this several years ago. Supposed to be an original, not rebuilt, '70 Stage 1 motor. If true, it makes sense that the 455 Stage 1 motor was much more powerful than Buick claimed.
I had a 70 455 convertible with I think a 2.90 something gear. The engine had a small cam and a set of headers with no other mods. It went 14.0 in Bristol TN. The car really pulled good.
