Cleveland prostock

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Steve.k
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Cleveland prostock

Post by Steve.k » Sun Sep 03, 2017 10:34 pm

Does anyone know or remember what the old prostockers ran for gearing/ tire size?

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Re: Cleveland prostock

Post by engineguyBill » Sun Sep 03, 2017 10:36 pm

13x33 tire and 5:14 or 5:38 gears back in the small block days, I think.
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Re: Cleveland prostock

Post by statsystems » Sun Sep 03, 2017 10:43 pm

I think EB is pretty close. They also only had 4 gears. I'd suspect they had somewhere around a 2.90-3.10 first gear.

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Re: Cleveland prostock

Post by Steve.k » Sun Sep 03, 2017 11:31 pm

Thanks guys. Not as steep as i figured but i guess they were buzzing them to.

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Re: Cleveland prostock

Post by VegaJohn » Sun Sep 03, 2017 11:39 pm

Steve.k wrote:Thanks guys. Not as steep as i figured but i guess they were buzzing them to.
When you consider that is 1/4mile they would have been up there in the RPMs for sure.

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Re: Cleveland prostock

Post by DaveMcLain » Mon Sep 04, 2017 12:42 pm

VegaJohn wrote:
Steve.k wrote:Thanks guys. Not as steep as i figured but i guess they were buzzing them to.
When you consider that is 1/4mile they would have been up there in the RPMs for sure.
I was told that back in the '70's with around a 340 inch Cleveland that they would leave the line at about 10,500rpm and probably never drop below 9500rpm or so for the whole pass. Which when you look at the parts they were using, particularly the valve springs what they were doing was pretty darn amazing.

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Re: Cleveland prostock

Post by Steve.k » Mon Sep 04, 2017 2:45 pm

No kidding and the guy i bought my heads from said he was using stock new blocks from ford. No furnace brazed liners for him. He said they never had much trouble with blocks. Just valves. Things never got better till they received new titanium valves from trw.

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Re: Cleveland prostock

Post by piston guy » Thu Sep 07, 2017 3:51 pm

5.43, 5.67,5.83 ratios and 14-32 Firestones in the small block era. Goodyear wasn't the best tire back then. Well that's what Dyno and Lee Hunter used.

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Re: Cleveland prostock

Post by turdwilly » Thu Sep 07, 2017 4:02 pm

piston guy wrote:5.43, 5.67,5.83 ratios and 14-32 Firestones in the small block era. Goodyear wasn't the best tire back then. Well that's what Dyno and Lee Hunter used.
No need for the "back then" in your 2nd sentence.

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Re: Cleveland prostock

Post by GARY C » Thu Sep 07, 2017 4:12 pm

turdwilly wrote:
piston guy wrote:5.43, 5.67,5.83 ratios and 14-32 Firestones in the small block era. Goodyear wasn't the best tire back then. Well that's what Dyno and Lee Hunter used.
No need for the "back then" in your 2nd sentence.
Makes me wonder when M/T came on the scene and how long it took him to be competitive? I have a set of M/T SBC alum rod's, probably 30 years old or better.

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Re: Cleveland prostock

Post by SupStk » Thu Sep 07, 2017 4:38 pm

GARY C wrote: Makes me wonder when M/T came on the scene and how long it took him to be competitive? I have a set of M/T SBC alum rod's, probably 30 years old or better.
I'm guessing, "or better".
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Re: Cleveland prostock

Post by Steve.k » Thu Sep 07, 2017 6:21 pm

Most of them ran the Cleveland stock crank. When you figure hp ratings over 800hp. Nasty.

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Re: Cleveland prostock

Post by DaveMcLain » Thu Sep 07, 2017 9:18 pm

Steve.k wrote:Most of them ran the Cleveland stock crank. When you figure hp ratings over 800hp. Nasty.
Don't forget that they also turned them .300 under to a 2 inch rod throw. I don't think they made that kind of power back then, maybe a bit over 700 but still....

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Re: Cleveland prostock

Post by piston guy » Tue Sep 12, 2017 12:04 pm

740 was REALLY good hp in 77-78. Cast cranks , 2" rod journals , 6" or longer rods ( C&A, BRC, Venolia, no M/T rods by then). There were only two tires offered , Firestone or Goodyear.

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Re: Cleveland prostock

Post by engineguyBill » Tue Sep 12, 2017 4:23 pm

piston guy wrote:740 was REALLY good hp in 77-78. Cast cranks , 2" rod journals , 6" or longer rods ( C&A, BRC, Venolia, no M/T rods by then). There were only two tires offered , Firestone or Goodyear.

M & H Racemaster slicks were also used extensively by Top Fuel, Funny Car, Pro Stock Competition Eliminator and other classes during that time period . . . . . . .
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