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07-10-2010, 09:25 AM | #21 |
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Re: The Best HP Rated Car.
Mark and Dwight,
Thank You, You understood what I meant, when I said 'yesteryear'. Ken, I did not mean todays re-factored HP ratings. Your correct though, the 350/255 LM1 engine at 280HP (todays NHRA HP rating) is what it should have been. Those early 1969 350/255HP LM1 engines (in the Camaro's and Nova's (12.00-12.49 wt/hp) and Chevelle's (12.50-12.99 wt/hp), did a number on everyone in J/S, K/S and L/S as well as SS/M and SS/N back-in-the-day 69' thru 73'. They might not have won all the major events back then, but at local tracks those engine combo's in those cars were always in the "Top" of Stock Eliminator. Looking back, for stock class that 255HP was way low by yesterdays standards. Properly rated at 275 or 280 horsepower, those 69' Camaro's and Nova's would still have been competitive in the 11.00-11.49 wth/hp bracket, (ie; H/S in 69' and I/S in 70'/71'). If you take a peak at the NHRA blueprint specs, you can see that the 350/255HP engine is closer to the 350/300HP engine specs than the 327/250HP engine specs (which it replaced as Chevrolet's base 4-barrel engine). A 275HP to 285HP rating is more in line. PC Last edited by Paul Ceasrine; 07-10-2010 at 10:06 AM. |
07-10-2010, 10:30 AM | #22 |
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Re: The Best HP Rated Car.
Very good point Dwight. And that was way before the AHFS.
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07-10-2010, 11:32 AM | #23 |
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Re: The Best HP Rated Car.
CC'd,
The major difference between the 1969 #LM1 350/255HP engine and the #L48 350/300HP is the compression. 10.25-1 for the 300HP and 9.00-1 for the 255HP. The 300HP had a 4-bolt main block, and the 255HP had a 2-bolt main. The Rochester #203 carburetor (750cfm) and #184 spread-bore cast iron intake are the same. The hydraulic camshafts .390/.410 lift and 258/269 duration, and valve train components are the same. The cylinder head valves,1.94 intake and 1.50 exhaust valves are the same, but the #L48 350/300HP utilized #041 castings with (63 cc chambers), and the 255HP utilized #441 castings with (76 cc chambers). Both used flat top pistons with notches. The #LM1 engine could be ordered in a non-SS car only, the #L48 engine was a SS Package only. WHEW!! CC, Come to think of it, your right. There were alot more guys running the 69' 350/255HP Camaro's with success in 69' thru 73', than the 69' Camaro SS350/300HP. The 69' SS Camaro's got clobbered in G/S and G/SA (10.00-10.49 wt/hp). A sneaky class, 69' Camaro 350/255HP convertible automatic in L/SA (70'/71') and/or (SS/NA 1972, National record 12.26; see John Lingenfelter) Last edited by Paul Ceasrine; 07-10-2010 at 12:52 PM. |
07-10-2010, 06:44 PM | #24 |
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Re: The Best HP Rated Car.
And just for the record, the 350/255 Camaro was ONLY available with a FLAT hood!
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07-10-2010, 10:51 PM | #25 |
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Re: The Best HP Rated Car.
Paul....you don't have to go that far back, let's talk 305 ci combos, sleds on the street but killers on the strip and still got something left, both carb and injected...
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07-10-2010, 10:59 PM | #26 |
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Re: The Best HP Rated Car.
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07-10-2010, 11:46 PM | #27 |
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Re: The Best HP Rated Car.
Don he was only being facitious.
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07-11-2010, 01:56 AM | #28 |
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Re: The Best HP Rated Car.
The cowl hood was first seen on the Indy Pace cars , which were 300 hp , 350's or 396's. NHRA allows them on any 4bbl Camaro
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07-11-2010, 08:26 AM | #29 |
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Re: The Best HP Rated Car.
Can I have a cowl hood also ? PLEASE
From what I have been told the Nova should have 5 hp LESS . Because the Camaro has the cowl hood..
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07-11-2010, 08:32 AM | #30 | |
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Re: The Best HP Rated Car.
Quote:
As a personal note, I coached a friend of mine in optioning a 1969 Camaro he ordered. He was attending college at the time and was receiving some money from his dad who required "no hot rod". He ordered a base Camaro with an F41 suspension, 350-255, four speed, positraction, spoilers, ZL2 hood, disc brakes, HD rear axle, custom interior and several other comfort features. Nice car. Not too fast, but one that many would covet today. |
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