Look what the mail man dropped at the door today

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srixon4406

srixon4406

TURBO TOAD
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I just got some parts from a member over on. Org today they look great and I can't wait to see them on the motor
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Bill Dedman said:
How very cool!!! Tell us about the rocker arms, please... :)
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Bill the rockers are supposedly true 1.6 ratio offered by but not produced from clifford there a cast product that I was spectacle about buying but I got a really good deal on both parts
I took some measurements to check the ratio but I can't for the life of me remember how to check the ratio maybe you can share that knowledge with me one more time
Aaron
 
srixon4406 said:
Bill the rockers are supposedly true 1.6 ratio offered by but not produced from clifford there a cast product that I was spectacle about buying but I got a really good deal on both parts
I took some measurements to check the ratio but I can't for the life of me remember how to check the ratio maybe you can share that knowledge with me one more time
Aaron
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Here's a freehand drawing with dimensions. As I remember it, if you reduced the distance from the pushrod seat to the center of the shaft by .100", you'd get a nominal 1.6 instead of a 1.5 ratio. Hope this helps...

1.788 divided by 1.191 = 1.5:1
1.788 divided by 1.091 = 1.63:1
 

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OK Bill that helps Alot I had my numbers backwards here's what I came up with this is not exact numbers but are very close and my center points may be fractions off
Valve tip center to the center of the shafts 1.875
Push rod cup adjuster to the center of the shafts 1.17
1. 875/1. 17=1.6025 which should be just about right on 1.6 ratio I hoping to install these bad boys in the morning
 
I know where they're getting the rockers from. I'll give you a hint. Look at their offset. .....and they ARE offset.
 
There's a pic for you Rob I can see what you mean there is some offset there but there making good contact on the valve tips
IMG_20120530_080204.jpg
 
Those are Buick straight eight rockers. RAS does them. They have a left, right and center offset. It appears that they are using only the left and right offset, but it looks like it worls well.
 
StrokerScamp said:
Those are Buick straight eight rockers. RAS does them. They have a left, right and center offset. It appears that they are using only the left and right offset, but it looks like it worls well.
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Are they different shaft size and they are bushing them !!!
Now, I am on the hunt for a Buick Straight Eight !!!
Martin
You do not know how many shaft rockers I already eliminated...352 ford...
 
Guys they fit good I did do a valve lash on them before I went to sleep I'm going to do another this evening and I'll take a short video with them in action I had the chance to look them over and yes martin the rockers are bushed with a brass bushing with a oil groove in the center along with a oil passage hole trough to the body of the rocker
The spacers in between the rockers look kind of cheap and I might have to look into get some billet aluminum spacers made up but will see how they work out
Aaron
 
Aaron, I sure would love to know what the lift at the valve is and if it corresponds with the 1.6 advertised ratio. Could you measure it for us? That would be valuable information for you as well. Thanks.
 
StrokerScamp said:
Aaron, I sure would love to know what the lift at the valve is and if it corresponds with the 1.6 advertised ratio. Could you measure it for us? That would be valuable information for you as well. Thanks.
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I'll have to get a different mag base for my dail indicator I tired to set up last nite but the one I have doesn't lock on the main arm ill grab a different base from work tonight
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Is this the easiest way to do it or is there a different way to go about it
 
You need to measure on the valve end. That will tell us the story on the rocker ratio. What's the lobe lift on your cam? Multiply your lobe lift times 1.6 and that should be about what you get when you measure lift at the valve. You should be able to simply go straight off the valve spring retainer, but you want to make sure you're as parallel with the valve stem as possible.
 
Hey,
Off topic.
Fuel log looks a little to close the the headers/manifold.
Aren't you worried about the heated fuel this will make ?
 
Johnny Dart said:
Hey,
Off topic.
Fuel log looks a little to close the the headers/manifold.
Aren't you worried about the heated fuel this will make ?
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Thanks for the concern about the fuel log it may be Alittle close I'm going to be keeping my eye on it and if I need to change it that won't be a problem
As for the plug wires yes those are the ones in running also the dizzy as well I ended up cutting one of the wires late last year when I was putting the head on the car in the engine bay
 
StrokerScamp said:
You need to measure on the valve end. That will tell us the story on the rocker ratio. What's the lobe lift on your cam? Multiply your lobe lift times 1.6 and that should be about what you get when you measure lift at the valve. You should be able to simply go straight off the valve spring retainer, but you want to make sure you're as parallel with the valve stem as possible.
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Rob I guess I don't see how to measure at the valve tip without starting from a open compressed valve? As far as lift is concerned 483 intake 489 on the exhaust set at 1.5 ratio
School me on what you want and I'll see about getting it done I want to no as well
Thanks Aaron
 
No, all that is doing is measuring lobe lift. Trust me. Just set it up like I said. Get the dial indicator on the top of the valve spring retainer. Screw that dot org ****. They are degreeing the cam, not measuring lift at the valve. Two different animals. Just make sure you have the dial indicator as parallel to the valve stem as possible. The retainer is fine for a reference measurement since it moves with and the same amount as the valve. If you measure on the pushrod side, all you'll get is lobe lift. The rocker arm ratio won't even be in the equation.
 
OK rob but I'm still confessed how will the inductor take a reading when the valve moves in a open or down motion
 
Set the indicator up preloaded on the retainer for something over the actual advertised valve lift....say if the lift at the valve is supposed to be .525, set the indicator up preloaded at .600. Make sure the cam lobe is on the base circle of course. Zero the dial indicator. Then rotate the engine until max lift is acheived. Take your reading.
 
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