***7.450 push rods***
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Thx
Last edited by SLPRC5; Aug 30, 2007 at 01:20 AM.
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
.............Paul
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Okay,
I did the wipe w/o any shims.
The whip pattern was toward the exhaust manifold. To me this may be caused by the push rods being too long. Am I wright?
Here is a picture of what it looked like.
I did the wipe w/o any shims.
The whip pattern was toward the exhaust manifold. To me this may be caused by the push rods being too long. Am I wright?
Here is a picture of what it looked like.
Last edited by SLPRC5; Aug 29, 2007 at 07:27 PM.
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
To move the pattern requires modifying the geometry. Let VN respond, he may say you are within range already.
Last edited by Dan_the_C5_Man; Aug 30, 2007 at 06:47 PM.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Not caused by the length of the pushrod; remember, you have hydraulic lifters, they adjust (within reason).
To move the pattern requires modifying the geometry, i.e. shims. Let VN respond, he may say you are within range already; if not, shims under the rockers would move the pattern toward the intake (which is what you want).
To move the pattern requires modifying the geometry, i.e. shims. Let VN respond, he may say you are within range already; if not, shims under the rockers would move the pattern toward the intake (which is what you want).
Ok..thanks..
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Deno,
Sent you a PM too, basically your rockers are too high. I think Yella Terra makes a shorter pedestal, you need to contact them. Other option is to machine down the pedestals your have. One way you may be able to figure out how much is to get two washer stacks (cheap washers) that have an OD of the smaller diameter of the rocker pedestal, stack them up a little shorter than the pedestal and install the rockers with the washer stacks so you can adjust your wipe by moving the rocker downward. This will help you come up with the required installation height. Can you see a wipe pattern on your other valves from the Harlands? Bet they were off as well.
Are you using check springs?
Sent you a PM too, basically your rockers are too high. I think Yella Terra makes a shorter pedestal, you need to contact them. Other option is to machine down the pedestals your have. One way you may be able to figure out how much is to get two washer stacks (cheap washers) that have an OD of the smaller diameter of the rocker pedestal, stack them up a little shorter than the pedestal and install the rockers with the washer stacks so you can adjust your wipe by moving the rocker downward. This will help you come up with the required installation height. Can you see a wipe pattern on your other valves from the Harlands? Bet they were off as well.
Are you using check springs?
Racer
Joined: Sep 2000
Posts: 373
Likes: 0
From: Wakefield R.I.
Deno,
Vettenuts here, we are finishing up 04bluegoose's car. One more thought. Lashing caps will also correct this. I believe the LS7 used lash caps on the titanium valves, this might be an option. The lash caps won't require any machining, but not sure what is available for the LSx valves. I can snoop around later today, but check with the LS7 guys in the C6 section, see if they know the LS7 uses caps and any dimensions from them.
Vettenuts here, we are finishing up 04bluegoose's car. One more thought. Lashing caps will also correct this. I believe the LS7 used lash caps on the titanium valves, this might be an option. The lash caps won't require any machining, but not sure what is available for the LSx valves. I can snoop around later today, but check with the LS7 guys in the C6 section, see if they know the LS7 uses caps and any dimensions from them.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Deno,
Sent you a PM too, basically your rockers are too high. I think Yella Terra makes a shorter pedestal, you need to contact them. Other option is to machine down the pedestals your have. One way you may be able to figure out how much is to get two washer stacks (cheap washers) that have an OD of the smaller diameter of the rocker pedestal, stack them up a little shorter than the pedestal and install the rockers with the washer stacks so you can adjust your wipe by moving the rocker downward. This will help you come up with the required installation height. Can you see a wipe pattern on your other valves from the Harlands? Bet they were off as well.
Are you using check springs?
Sent you a PM too, basically your rockers are too high. I think Yella Terra makes a shorter pedestal, you need to contact them. Other option is to machine down the pedestals your have. One way you may be able to figure out how much is to get two washer stacks (cheap washers) that have an OD of the smaller diameter of the rocker pedestal, stack them up a little shorter than the pedestal and install the rockers with the washer stacks so you can adjust your wipe by moving the rocker downward. This will help you come up with the required installation height. Can you see a wipe pattern on your other valves from the Harlands? Bet they were off as well.
Are you using check springs?
I don't know what what check springs are.
Is the wipe suppose to be in the center are closer to the intake?
Thanks,
Sleeper
Last edited by SLPRC5; Aug 30, 2007 at 02:47 PM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Ideal is center of the valve stem. If you are going to error, better to error closer to the intake in my opinion. The reason being at full valve open (assuming the pattern is a little closer to the intake side) the roller will be near the valve stem center such that max spring load will have minimum side loads against the valve guide.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
I think I made it home this time.
With the help of all you guys and the finalization with AVB
I'm using the Yella Terra RR with the shims provided on 7.425 p-rods. With the rockers in place and finger tighten to where the p-rods were snug in the caps and the roller on the valve stems giving no pressure on the push rod to move up or down.
Then I torqued the bolts to 22 Ft-Lbs (although YT recommended 25 Ft-Lbs.). It took exactly 1/2 turn to reach the 22 Ft-Lbs.
I allso figured out how to get the wipe pattern and it is in the center of the valve steem and it's a thin line (.060).
So tomorrow I'll be firing it up to see how quiet it is and if it isn't, I'll have to use the p-rod checker when it come in.
Thanks to all of you for helping me out and providing skillful information to everyone. You guys and CF are awesome
Sleeper
With the help of all you guys and the finalization with AVB
I'm using the Yella Terra RR with the shims provided on 7.425 p-rods. With the rockers in place and finger tighten to where the p-rods were snug in the caps and the roller on the valve stems giving no pressure on the push rod to move up or down.
Then I torqued the bolts to 22 Ft-Lbs (although YT recommended 25 Ft-Lbs.). It took exactly 1/2 turn to reach the 22 Ft-Lbs.
I allso figured out how to get the wipe pattern and it is in the center of the valve steem and it's a thin line (.060).
So tomorrow I'll be firing it up to see how quiet it is and if it isn't, I'll have to use the p-rod checker when it come in.
Thanks to all of you for helping me out and providing skillful information to everyone. You guys and CF are awesome
Sleeper
Last edited by SLPRC5; Aug 31, 2007 at 03:30 AM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
The cam we installed has very aggressive lobes. It has some noise that I can only describe as "well oiled mechanical" like an old open factory machine. It has no valve train noise. The noise we hear is radiating through the intake. When you shut the hood, you can't really hear it.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
The cam we installed has very aggressive lobes. It has some noise that I can only describe as "well oiled mechanical" like an old open factory machine. It has no valve train noise. The noise we hear is radiating through the intake. When you shut the hood, you can't really hear it.
That is great to hear (no pon intended) hope the YT work for me, seems the shims put them in the right spot for the 7.425 p-rods. I'm hoping for the same the old sound, but not that of solid lifters. I have install plug, coil packs and wires; then fire it up.
Sleeper
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Deno,
Vettenuts here, we are finishing up 04bluegoose's car. One more thought. Lashing caps will also correct this. I believe the LS7 used lash caps on the titanium valves, this might be an option. The lash caps won't require any machining, but not sure what is available for the LSx valves. I can snoop around later today, but check with the LS7 guys in the C6 section, see if they know the LS7 uses caps and any dimensions from them.
Vettenuts here, we are finishing up 04bluegoose's car. One more thought. Lashing caps will also correct this. I believe the LS7 used lash caps on the titanium valves, this might be an option. The lash caps won't require any machining, but not sure what is available for the LSx valves. I can snoop around later today, but check with the LS7 guys in the C6 section, see if they know the LS7 uses caps and any dimensions from them.
Safety Car
Joined: Apr 2004
Posts: 3,932
Likes: 8
From: Hayward California
Congrats
That is great to hear (no pon intended) hope the YT work for me, seems the shims put them in the right spot for the 7.425 p-rods. I'm hoping for the same the old sound, but not that of solid lifters. I have install plug, coil packs and wires; then fire it up.
Sleeper
That is great to hear (no pon intended) hope the YT work for me, seems the shims put them in the right spot for the 7.425 p-rods. I'm hoping for the same the old sound, but not that of solid lifters. I have install plug, coil packs and wires; then fire it up.
Sleeper
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
AVB..I sent you a PM on what went on with the startup tonight...
The YT has made the sewing machine sound quieter and bearable. All I hear is the even sound of a near stock sewing machine sound along with the intake noise.
I can hear the fans when they come on now
The p-rods were checked without the p-rod checker because it hasn't arrived yet. I will use it when it comes in just to see how close Iam to having the correct p-rods
Again a big THANKS to you and everyone who helped me on this project.
Sleeper
The YT has made the sewing machine sound quieter and bearable. All I hear is the even sound of a near stock sewing machine sound along with the intake noise.
I can hear the fans when they come on now
The p-rods were checked without the p-rod checker because it hasn't arrived yet. I will use it when it comes in just to see how close Iam to having the correct p-rods
Again a big THANKS to you and everyone who helped me on this project.
Sleeper
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
AVB..I sent you a PM on what went on with the startup tonight...
The YT has made the sewing machine sound quieter and bearable. All I hear is the even sound of a near stock sewing machine sound along with the intake noise.
I can hear the fans when they come on now
The p-rods were checked without the p-rod checker because it hasn't arrived yet. I will use it when it comes in just to see how close Iam to having the correct p-rods
Again a big THANKS to you and everyone who helped me on this project.
Sleeper
The YT has made the sewing machine sound quieter and bearable. All I hear is the even sound of a near stock sewing machine sound along with the intake noise.
I can hear the fans when they come on now
The p-rods were checked without the p-rod checker because it hasn't arrived yet. I will use it when it comes in just to see how close Iam to having the correct p-rods
Again a big THANKS to you and everyone who helped me on this project.
Sleeper
Now time for a bigger cam
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
