Second sensible question

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Kev
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Post by Kev »

A round one :thumbright:
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AllKiller
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Post by AllKiller »

where does the cam come on ?
you wanna stall about 500 rpm below that, what gears in the back end ?
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Kev
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Post by Kev »

How much money have you got? £300 or £1000?
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Dave-R
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Post by Dave-R »

.509 cam. Why don't you call it by its proper name? :roll:

May I offer you a slice of informed advice? ;)

There are two "509" cams. One hydraulic and the other solid. Both are very different cams.

I will assume it is the Hydraulic P4120237 with 292 "advertised" duration.

This one has about 248 degrees duration @ .050 lift. So you want a 4000rpm stall converter and anything from a 3.91 to 4.88:1 rear gear depending on your rpm limit and tyre size.
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AllKiller
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Post by AllKiller »

well if you keep those MAHOOSIVE tyres you'll need 4.88's at least

Sorry Pete, When i said "comes on" i meant Torque
you'll need a convertor 500 to 700 rpm below the max torque point of your new motor, so you'll need to put all the relevant info into a dyno simulator to find this out...C.I.,Heads,head chamber CC's compression,rod length,cam, intake, carb etc,etc
Then you will have a ball park area to work in, so on the line you can trans brake the motor to just under max Torque and leave like a Scalded cat 8-)
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AllKiller
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Post by AllKiller »

Car: 1968 Plymouth Barracuda Fastback Transmission: 727 w/special tight Coan 8" converter
Engine: 451 ci stroker (400 Block - long rod) Rearend: 8 ¾" w/4.56 gears
Heads: Mopar Performance Stage VI w/ Max Wedge Ports Front Suspension: Stock w/ 90/10 shocks
Porting: Mild clean-up in bowls
Rear Suspension: Super Stock springs
Induction: 1962 Max-Wedge Cross Ram w/ 750cfm AFB's Tires: 29.5X11.5 Hoosier Quick-Time Pro ET
Camshaft: MP P4120663 .590 lift 312º duration solid lifter Exhaust: TTI 3 inch w/DynoMax mufflers
Conditions were clear and calm, air temperature 70-75º, with humidity levels in the mid 60's. 4 runs were made, with a best e.t. of 11.40 @ 119.88, with the highest mph reading an 11.43 @ 120.28 pass, and a best 60 ft time of 1.61.
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Dave-R
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Post by Dave-R »

That's better. ;)

I would actually shoot for something about the same size to be honest. I was toying with you. :D

But if you want to be sure. Go here http://tcsproducts.com/ or email a guy there I know called Graham Shortre ( gshortre@telus.net ) and he will sort you out.

The company is in BC, Canada so Jeff Brown could be a good contact when he moves there. ;)

Try to get the weight plus you and the fuel as close as possible. They will also need to know the cam spec so here it is;

Duration @ 0.050 lift is 265 intake and exhaust.
Intake lobe centreline is 104 ATDC
Exhaust " " is 108 ATDC
Lobe seperation angle is 106 degrees.
Lift intake and exhaust is 0.509 inches.

Hope that helps.
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Dave-R
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Post by Dave-R »

Thats alright as long as you don't mind the occasional dumb answer. :D
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AllKiller
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Post by AllKiller »

Pete What size is this engine ??
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