Bruceynz
Well-Known Member
cam 209 and .496" lift, so its spec'ed as a 1000 - 5200 what ever that means, I suspect it will be out of puff around 4700 and 500 above takes us to 5200 rpm, sound good?
Holley Vacuum Secondary Spring
- Thread starter Bruceynz
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AJ/FormS
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Probably not.
If you're running a 2.45-1.45-1.00 trans with a low stall you're in for a surprise. If you shift into second at 5200, the Rs fall to 1.45 /2.45 x 5200 =3070. Your engine got power down there? Not much. With 3.21s and 26s this is about 49mph. So if you're in a hurry you'll have to wait to get back on the power band, to maybe 3980/63 mph.... that's gonna suck.
The usual way around this is keep it in gear about a thousand rpm after the power peak, or until the outgoing power is about the same as the incoming power. So I'ma guessing you'd want to shift at 6000 to drop in at 3540. This would happen at about 56mph. You might as well just leave it in first until 60, and stuff it in D,lol. 3.21s suck.
But if that cam is really a 209* @.050, maybe a 252advertised, then yeah she'll be done pretty early. The factory 360 2bbl cam was a 252.* But not with .496 lift! Anyway, I'm guessing that will peak around 4900, so the shift might be as early as 5900.You'll have to run some shift loops and find the best fit. Don't get caught speeding,lol.
If you're running a 2.45-1.45-1.00 trans with a low stall you're in for a surprise. If you shift into second at 5200, the Rs fall to 1.45 /2.45 x 5200 =3070. Your engine got power down there? Not much. With 3.21s and 26s this is about 49mph. So if you're in a hurry you'll have to wait to get back on the power band, to maybe 3980/63 mph.... that's gonna suck.
The usual way around this is keep it in gear about a thousand rpm after the power peak, or until the outgoing power is about the same as the incoming power. So I'ma guessing you'd want to shift at 6000 to drop in at 3540. This would happen at about 56mph. You might as well just leave it in first until 60, and stuff it in D,lol. 3.21s suck.
But if that cam is really a 209* @.050, maybe a 252advertised, then yeah she'll be done pretty early. The factory 360 2bbl cam was a 252.* But not with .496 lift! Anyway, I'm guessing that will peak around 4900, so the shift might be as early as 5900.You'll have to run some shift loops and find the best fit. Don't get caught speeding,lol.
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I’m not an expert on break-in advice.
I’ve heard tons of advice over the years and got me on who is correct. The most common advice I have heard, is to “Drive it like you stole it”.
That said, don’t get on the bad side of the Police.
BudW
I’ve heard tons of advice over the years and got me on who is correct. The most common advice I have heard, is to “Drive it like you stole it”.
That said, don’t get on the bad side of the Police.
BudW
Bruceynz
Well-Known Member
Well whats done is done now, no long idling, quite a few full throttle runs up to 3500rpm, she has not been driven easy, time to take her over 5000rpm I recon!
Oldiron440
Well-Known Member
Yes you have to load the rings and the rods.
