Reidus and Cletus are going to the dyno today, what are your guesses?

"cletus44 aka Clayton Seams" (cletus44) 07/13/2017 at 12:13 • Filed to: #ReidusandCletus, Episode 5

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What power do you think each car will make to the wheels? I’m guessing 240 for the Corvette and 42 for the Datsun.

The specs!

1970 Corvette

Factory rated at 350 hp and 380 lb/ft
headers and sidepipes
Lumpy cam of unknown origin
94,000 miles on it

1968 Datsun

Factory rated at 96 hp and some torque
Headers and muffler delete
Screen door air filters for max hp
Unknown mileage

CB > cletus44 aka Clayton Seams 07/13/2017 at 12:17

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250.

8 1/2.

gmctavish needs more space > cletus44 aka Clayton Seams 07/13/2017 at 12:18

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I say the Vette does 275 and the Datsun does 62

Daily Drives a Dragon - One Last Lap > cletus44 aka Clayton Seams 07/13/2017 at 12:24

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250 for the vette and 50 for the datsun

Ike > cletus44 aka Clayton Seams 07/13/2017 at 12:24

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127 & 39

cletus44 aka Clayton Seams > Ike 07/13/2017 at 12:24

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Quite the optimist haha

Sweet Trav > cletus44 aka Clayton Seams 07/13/2017 at 12:25

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201 for the Corvette (The Corvette was rated via BS SAE gross system, pretty much they just lied about how much power it made)

47 for the Datsun.

Ike > cletus44 aka Clayton Seams 07/13/2017 at 12:27

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I am a optimist, now go buy my shirt lol

My X-type is too a real Jaguar > cletus44 aka Clayton Seams 07/13/2017 at 12:29

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205 for the Vette, 28 for the Datsun

RallyDarkstrike - Fan of 2-cyl FIATs, Eastern Bloc & Kei cars > cletus44 aka Clayton Seams 07/13/2017 at 12:34

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I’m guessing 300 for the Corvette and 82 for the Datsun!

cletus44 aka Clayton Seams > RallyDarkstrike - Fan of 2-cyl FIATs, Eastern Bloc & Kei cars 07/13/2017 at 12:34

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300! That would be nice.

cletus44 aka Clayton Seams > Sweet Trav 07/13/2017 at 12:35

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Smart. Everyone forgets that gross ratings are 20% optimistic.

Smallbear wants a modern Syclone, local Maple Leafs spammer > cletus44 aka Clayton Seams 07/13/2017 at 12:36

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Assuming you mean WHP?

Corvette. I think you said the engine was just rebuilt, so with the lumpy cam should be over factory hp.

310whp/340tq

Datsun. 50 years of abuse. Well-flowing setup. On an engine that seems to have serious issues.

55whp

lone_liberal > cletus44 aka Clayton Seams 07/13/2017 at 12:36

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That factory rating for the ‘Vette was gross so the net at the time was probably less than 300 and then rear wheel power was probably 270 or so. So I’m going for 245 for the Corvette. The same thing for the Datsun so I’m guessing 45 for it.

Takuro Spirit > cletus44 aka Clayton Seams 07/13/2017 at 12:38

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69 for the Datsun.

Can’t think of a sexual number for the Vette.

cletus44 aka Clayton Seams > Smallbear wants a modern Syclone, local Maple Leafs spammer 07/13/2017 at 12:42

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Yup! Roller dyno. I’m excited to see what they make!

cletus44 aka Clayton Seams > Takuro Spirit 07/13/2017 at 12:48

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Every corvette dyno number is sexy

Smallbear wants a modern Syclone, local Maple Leafs spammer > cletus44 aka Clayton Seams 07/13/2017 at 12:48

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Also, if it’s a Mustang dyno:

300/330

50

cletus44 aka Clayton Seams > My X-type is too a real Jaguar 07/13/2017 at 12:48

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Ouch! 28? Man, that’s Fiat 500 territory.

Manwich - now Keto-Friendly > cletus44 aka Clayton Seams 07/13/2017 at 12:49

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I’m gonna guess 270hp for the Corvette and 68hp for the Datsun.

Smallbear wants a modern Syclone, local Maple Leafs spammer > lone_liberal 07/13/2017 at 12:51

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But, the CV is down one power steering pump and up one lumpy cam (and a rebuild). I didn’t know about the gross HP thing but I’d still say high 200's whp.

My X-type is too a real Jaguar > cletus44 aka Clayton Seams 07/13/2017 at 12:52

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Bad memories of my 86 Nissan Pulsar, when it was smoking and down a cylinder it’s top speed was about 40.

BiTurbo228 - Dr Frankenstein of Spitfires > cletus44 aka Clayton Seams 07/13/2017 at 12:55

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Are those factory numbers net or gross?

cletus44 aka Clayton Seams > BiTurbo228 - Dr Frankenstein of Spitfires 07/13/2017 at 12:58

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The grossest.

cletus44 aka Clayton Seams > Smallbear wants a modern Syclone, local Maple Leafs spammer 07/13/2017 at 12:59

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Dynojet 224x apparently.

lone_liberal > Smallbear wants a modern Syclone, local Maple Leafs spammer 07/13/2017 at 13:01

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You forgot the 45 years. It takes a toll too, as I well can feel every morning.

Sweet Trav > cletus44 aka Clayton Seams 07/13/2017 at 13:08

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My Momma didn’t raise no dummy

Smallbear wants a modern Syclone, local Maple Leafs spammer > lone_liberal 07/13/2017 at 13:16

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The fresh rebuilt should take it very close to stock though, just on it’s own.

crowmolly > cletus44 aka Clayton Seams 07/13/2017 at 13:45

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315whp/350tq

And before somebody says Oh gee wowie net vs gross blah blah

Yeah, well, don’t forget that 60's exhaust manifolds were basically designed to be cheap, durable, and get hot gasses from A to B. That’s it.

Headers and exhaust will make a big difference.

lone_liberal > Smallbear wants a modern Syclone, local Maple Leafs spammer 07/13/2017 at 13:45

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Good points. You could very well be right. It’s hard to know how well everything is sealed up without going through it so it’s hard to really narrow down the range it will be in other than “probably between 200 and 300".

just-a-scratch > Smallbear wants a modern Syclone, local Maple Leafs spammer 07/13/2017 at 14:00

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I’m with Smallbear on this, but I’ll play the Price is Right rules with 311 and 56 respectively.

cletus44 aka Clayton Seams > crowmolly 07/13/2017 at 14:07

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Zora Arkus Duntov himself said that headers and sidepipes are worth 75 HP on a 427 Corvette. Tune that down a bit for a 350 but headers make a big difference.

crowmolly > cletus44 aka Clayton Seams 07/13/2017 at 14:18

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Same with the ZL1 Camaros. The stock exhaust was very bad.

Die-Trying > cletus44 aka Clayton Seams 07/13/2017 at 15:30

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immona guess on the high side for the corvette......380 hp...... for the datsun 81 hp......

punkgoose17 > cletus44 aka Clayton Seams 07/13/2017 at 15:44

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42 for the Datsun because 42 is the answer.

269 for the Corvette - I was going to say 256, but you did remove the power steering.

MM54 > cletus44 aka Clayton Seams 07/13/2017 at 20:06

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222 at the wheels for the corvette, 44 for the Datsun

Birddog > cletus44 aka Clayton Seams 07/13/2017 at 21:00

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I’ll go around 200 for the Vette.

And an optimistic 60 for the Datsun.

BiTurbo228 - Dr Frankenstein of Spitfires > cletus44 aka Clayton Seams 07/14/2017 at 03:22

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Hmmm, i’m going to say you’re bang on with the Corvette but the Datsun will be 65whp. The Japanese were less...creative than the Americans with gross numbers ;)

XJDano > cletus44 aka Clayton Seams 07/15/2017 at 14:10

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281 & 72