Big Block Torque

[hammersley]

Ok folks - I see torque and HP from the ISB's but never see any from a "BIG BLOCK!" What sort of real numbers do they produce!

 

[HVAC]

I believe the signature 600 motor is rated at 2000 ft pounds of torque.

 

[hammersley]

Big Block GAS - Like the new GM 8 liter etc.

Oh boy did I ask this wrong - what I meant was our competition GAS motors for the 3/4 and 1 ton market.

 

[Chris N5CWM]

How much would you guess?

There is a new intercooled supercharger for the

GM 496 big-block. Stock it's rated at 340 HP and

455 Ft Lbs. With the intercooler option, the new

Whipple steps it up to about 500 HP, 700 Ft Lbs.



I gotta install one of those kits in my 2001 GMC

Yukon XL 2500 496!! Four-wheel drive burnouts!



>click here for more<

 

[lgibson]

I saw some time back in a hot rod mag that the 67 or 68 Olds rocket 455 had 505 ft pounds at about 4000 rpm. Don't know if it was true or not. It was an article on which car produced the most power stock.



Hey HVAC, have you found a way to put the signature 600 in the red rocket yet? Or is it underpowered for ya?

 

[RustyJC]

Our 1996 Dodge 3500 V-10 was rated 300 BHP @ 4000 RPM and 450 lb-ft @ 2800 RPM. Of course, we could argue that the V-10 isn't really a "big block" since it's a 360 with 2 more cylinders and an additional 0. 300" stroke.



Rusty

 

[hammersley]

Ok surely someone has seen with their own eyes an actual "big block gasser" on a mustang dyno... . The manufactures hp are for hype and aren't at the wheel wheels but at the flywheel - a huge difference.

 

[Bigsaint]

Originally posted by hammersley

Ok surely someone has seen with their own eyes an actual "big block gasser" on a mustang dyno... . The manufactures hp are for hype and aren't at the wheel wheels but at the flywheel - a huge difference.

No doubt. When I dynoed last year, I saw a vette turn 305 RWHP and a Viper with alot of mods make 455 RWHP. The Viper was fun to watch though, damn thing screamed.



Scott W.

 

[jjohnson1177]

Hey guys the old 472 and 500 caddie motors made torque into the 500 foot pound range stock! They make a great conversion for any tow vehicle.

 

[DPelletier]

The engine with the highest torque used in a regular production automobile was the 1970 Oldsmobile 455 W-30. Ratings and opinions on actual output vary from " well over 550 ft lbs to 640 ft lbs". Either way, lots of torque. Some of the Buick guys may try to convince you that a 1970 455 Stage I had the most torque, but they would be mistaken!



I miss my car.



Dave

 

[WOWZY]

I borrowed a friends Chiltons Motor manual that covered 1965-1971 engines. The biggest torque monster they listed was a 500cu. Caddy engine in a 1970 Eldorado. It made 400hp@4000rpm and 550lbft. @ (2200 or 2800 I think)



Back in '85 I shoehorned a Buick455 Stage 3 in my '79 Buick Regal that had a 3. 8L six in it originally. It was fun as hell racing that baby! I whooped every Mustang around, but what was funny was I left the wire hubcaps and whitewall tires on it!!



I don't remember what the Stage 3 was rated.







What the hell happened to my post count?!!! I was only a few posts from breaking a 1000.

 

[rrausch]

J. Johnson, those old Caddy 500 blocks had great metallurgy. The cast iron recipe was massaged (maybe with Manganese?) to make it strong as all get-out. I don't think any 500 blocks came apart or cracked from being run hard. And the blocks were all de-burred and "detailed" better than any other GM blocks. Too bad they changed.



Wowzy, that darn Doc Tinker stole them!

 

[PZicha]

Originally posted by DPelletier

The engine with the highest torque used in a regular production automobile was the 1970 Oldsmobile 455 W-30. Ratings and opinions on actual output vary from " well over 550 ft lbs to 640 ft lbs". Either way, lots of torque. Some of the Buick guys may try to convince you that a 1970 455 Stage I had the most torque, but they would be mistaken!



I miss my car.



Dave

Where did you get that info from , all the books that I ever read say 510 ft/lbs for the 70 442 w30 ... 640ft/lb from the factory ... I dont think so and as for as the buick stage one is concerned I personaly watched in shock as one smoked a hemi cuda in the quarter mile . stock against stock ... I have also beat a 70 442 w30 with my 73 transam , very close race but I am not stock at least not to 73 factory specs. my 455 is pushing right around 350 to 370 hp . Wowzy hit it right on the nose the 70 caddy 500 produced the most at 550 ft/lb the 426 hemi was rated at 490 ft/lb right along with the 440 same torque different hp though . the pontiac 455 ,olds 455 and buick 455 even though they were all different all were rated at 505 to 510 ft/lb and all rated at 370 hp in 1970 . after that ratings went down and bottomed out by 1975

 

[RustyJC]

Just something to keep in mind - until the early '70s, BHP and torque ratings were "gross" - that is, without accessories and with minimal intake and exhaust losses as the engine might see when installed on a dynamometer. After the early '70s, BHP and torque ratings were "net" - that is, as installed in a vehicle. The gross ratings were noticeably higher than the net ratings for the same engine. Therefore, you really can't compare these ratings without an appropriate correction factor.



Rusty

 

[PZicha]

I think hammersly was fishing for our gas pod equivelants , like the ford 6. 8L v10 , the chevy 8. 2L V8 , and the dodge V10 . I dont think any of them exeed 455ft/lb in stock trim . you can order a crate chev 502 that is 502hp at 550ft/lb and dodge DOES SELL THE 426HEMI and the 528HEMI in a crate package . The 528 is rated at 611hp and 656ft/lb , it even comes with a 90 day warranty... Do you have $12,000. 00 :{

 

[hammersley]

PZicha has it right

I was wondering about at the rear wheels. Bigsaint

mentioned "No doubt. When I dynoed last year, I saw a vette turn 305 RWHP and a Viper with alot of mods make 455 RWHP. The Viper was fun to watch though, damn thing screamed. " What about Torque on a DYNO. All the numbers we see I assume are at the flywheel - and not at the rear wheels. I would like to see a big block gas, say the new 8. 1 liter GM on a dyno, or for that matter any of the old favorites.

 

[DPelletier]

PZicha,



- 1) I was unable to dig up the 640 ft lb article in a quick search, but I offer this excerpt from MC mag. " The W-30 Oldsmobile wasn't the most powerful engine released by the Detroit supercar coalition, but it did offer one item that couldn't be matched by the rest: torque... . Qualified estimates in regard to the true torque figures of the W30 exceed 600 lbs. /ft. "



2) The ratings were often misleading both due to corporate politics as well as insurance reasons. According to MC mag. , the top 5 :

Corvette L-88 - 480 hp, 426 hemi - 470 hp, 454 LS-6 - 450 hp, 455 W-30 - 440 hp, 427 tripower - 435 hp.



3) As far as the Stage 1 beating the Hemi,... some run better than others of thier type, different gears, tires, trannys, etc. all conspire to make real world encounters between supercars a question mark each time. I have been able to drive several W-30's and they all varied somewhat in apparent strength.

I don't know how modified your 455 is, but a stock 73 T/A 455 would have trouble with a stock '70 W-30.



4) RustyJC is correct. GM used gross hp until '72 . CCraft claimed that a 426 hemi had 368. 70 rwhp, LS-6 Chevelle had 367. 80 rwhp, followed by the 70 W-30 with 343. 44 rwhp. The Buick was in 9th place with 297. 51

 

[E7mack96]

I have run many Olds 455's in my day. They are Torque Monsters. I have also put an olds 455 in a '78 Buick regal turbo car. Scary fast. Kept shattering the windshield, and breaking rear ends on the 1-2 shift.



I had Bishoffs engine in West harrison, in put a '70 Olds 455 together. in a 4800 lb Delta '88 royale loaded, with a 2. 73 peg leg open diff, i turned a 12. 04 in the 1/4 mile. Killer top end. It was like God swooped down and pushed the car with His hand.



I have one Olds 455 short block from 1970 left, sitting in the garage waiting for the next project. I see it now, Edelbrock aluminum heads, torker intake, 500 hp NOS, 2. 07/1. 71 valves, 10. 25-1 compression, 3000 stall, 4. 56 gears, locker, and a Turbo 400 all in a Dodge Ram 1500 short bed. ... with slicks.



Wadda think. ???

 

[DPelletier]

Sorry Hammersley,



I don't have any torque information on the BB's other than what I have mentioned. With cars most people are primarily concerned with horsepower.







EZMack96,



What do I think?



Use wheelie bars.







Dave

 

[PZicha]

Dave I,m not going to dispute what you claim , you might be right but I grew up with these cars and am very familiar with most of them in fact I have a stack of car craft that would go from the floor to the ceiling and the article you mention contradicts every thing that I have ever read , as for as the windshield cracking I have an article in carcraft where they shoehorn a caddy 500 into a chevette and this thing pushed low 11's in the quartermile , they didn't have that problem , If you ever find that article I would love to read it ... I am open to the possability however far fetched. . I just keep thinking what it takes modified big blocks today to get to 600ft/lb... Pete