PAC valve spring ?
Thread Starter
Burning Brakes
Joined: Jul 2007
Posts: 864
Likes: 2
From: Jax FL
PAC valve spring ?
It is time to refresh the valve springs on my stroker:
I have been advised to stay away from the double springs for my application.
My question is: should I use the PAC 1218's? or would the PAC 1518's be a better choice ?.......fair price? source?
cam specs are: 228/232 .581/.588 114 LSA+4
THANKS
I have been advised to stay away from the double springs for my application.
My question is: should I use the PAC 1218's? or would the PAC 1518's be a better choice ?.......fair price? source?
cam specs are: 228/232 .581/.588 114 LSA+4
THANKS
Thread Starter
Burning Brakes
Joined: Jul 2007
Posts: 864
Likes: 2
From: Jax FL
I myself am not technicaly qaulified to give you the entire anwser but I think that they are in some cases to tight for the valve train.....not spec'd for the valves etc????.... or maybe better said that overkill may not always be the best pratice......not saying doubles are bad but that in some cases they may be to much.....
Sorry that's the best I got!
Sorry that's the best I got!
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
... the 1218s and 1518s have the same exact dimensions and specs for spring rate/pressures. The 1518 is nitrited, and because of it, is rated to 0.650" lift instead of 0.600" lift for the 1218. The 1518s can take more abuse.I'm almost ready to replace the OEM springs in my LS6, and have pretty much decided to go with PAC 1518s. They should be very reliable in a stock LS6.
A thread from a while ago talking about PAC 1518 springs:
http://forums.corvetteforum.com/c5-t...ac-1518-a.html
PAC 1218 Specs:
http://www.racingsprings.com/Store/P...?ProductID=206
PAC 1518 Specs:
http://www.racingsprings.com/Store/P...?ProductID=220
Last edited by ZeeOSix; May 11, 2011 at 03:02 AM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Do you know what springs you are currently running? Reason for asking is that if currently running duals, you will need more than just springs to go to a beehive and vice versa.
Thread Starter
Burning Brakes
Joined: Jul 2007
Posts: 864
Likes: 2
From: Jax FL
They are whatever AFR uses on 205's. They were refreshed around 25,000 miles ago(by 1st owner) and at the same time the the AFR recall was done on the valves etc.....the gent that had this stroker built and installed at A&A is a very tech savy car guy and is the one whom advised that doubles are safer but are not compliant, so I am sure that it does not have doubles.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I would first find out what you have. You might be able to see the spring under the oil fill with a mirror and flashlight. Second, if they are the AFR springs you are going to need seats, retainers, seals, etc. to get to a beehive setup. I also think if you speak with Tomy Mamo, he will highly recommend you stick with the AFR valve springs.
As for beehives on the AFR's, that may not be a straight forward swap due to valve stem heights, valve weight, etc. I would strongly suggest contacting Tony Mamo to get input before spending any money.
As for beehives on the AFR's, that may not be a straight forward swap due to valve stem heights, valve weight, etc. I would strongly suggest contacting Tony Mamo to get input before spending any money.
Last edited by vettenuts; May 11, 2011 at 11:42 AM.
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Thread Starter
Burning Brakes
Joined: Jul 2007
Posts: 864
Likes: 2
From: Jax FL
I would first find out what you have. You might be able to see the spring under the oil fill with a mirror and flashlight. Second, if they are the AFR springs you are going to need seats, retainers, seals, etc. to get to a beehive setup. I also think if you speak with Tomy Mamo, he will highly recommend you stick with the AFR valve springs.
As for beehives on the AFR's, that may not be a straight forward swap due to valve stem heights, valve weight, etc. I would strongly suggest contacting Tony Mamo to get input before spending any money.
As for beehives on the AFR's, that may not be a straight forward swap due to valve stem heights, valve weight, etc. I would strongly suggest contacting Tony Mamo to get input before spending any money.
and I will do that.
Thread Starter
Burning Brakes
Joined: Jul 2007
Posts: 864
Likes: 2
From: Jax FL
I would first find out what you have. You might be able to see the spring under the oil fill with a mirror and flashlight. Second, if they are the AFR springs you are going to need seats, retainers, seals, etc. to get to a beehive setup. I also think if you speak with Tomy Mamo, he will highly recommend you stick with the AFR valve springs.
As for beehives on the AFR's, that may not be a straight forward swap due to valve stem heights, valve weight, etc. I would strongly suggest contacting Tony Mamo to get input before spending any money.
As for beehives on the AFR's, that may not be a straight forward swap due to valve stem heights, valve weight, etc. I would strongly suggest contacting Tony Mamo to get input before spending any money.
your were right on, I would have needed more than just springs
to put beehives on these AFR's......AFR 8019's enroute.
......thanks again!!!!!!! It almost always pays off to bounce questions off the forum
