Evidence of valve float?
those look like the junk *** springs that failed for me!! never again PAC ......
this will give you valve float and then they want you to buy new springs not even 500 miles or even a year on the POS I have patriot springs this time and new heads thanks to PAC springs that are junk! and they wont even replace them... not like I was even after them for the destroyed head or valves
both sides are cracked from the guide to the roof.
this will give you valve float and then they want you to buy new springs not even 500 miles or even a year on the POS I have patriot springs this time and new heads thanks to PAC springs that are junk! and they wont even replace them... not like I was even after them for the destroyed head or valves
both sides are cracked from the guide to the roof. Last edited by 89 formula350; Sep 18, 2011 at 07:58 AM.
I guess I will keep this going since it does apply to the original post asking about valve float
sorry no installed height taken on the original heads, they were by a well known vendor on the site and I never thought of checking the work although no shims or indication of work made to adjust height.
I will say im a little pissed on that end of the deal as well but they worked with me on my next set of heads (although not much but did something) so I wont say the name.
just be aware people make darn sure when you buy heads they provide you with TESTED spring pressures and install height info.
the replacements were just CNC heads that I had a local machine shop install patriot springs in along with my new valves. The local machine shop gave me the tested spring rates, install height and well more info than I really cared to know
the deal is most people (including builders) just drop springs in and run but thats the problem a batch of springs can and often times vary in rates and in the case of my PAC springs were not up to spec. this vendor just dropped them in and as you see my wallet suffered
the cam Isnt anything great its a proven grind that works well on the street... 224/228 .588/.588 114+1
sorry no installed height taken on the original heads, they were by a well known vendor on the site and I never thought of checking the work although no shims or indication of work made to adjust height.
I will say im a little pissed on that end of the deal as well but they worked with me on my next set of heads (although not much but did something) so I wont say the name.
just be aware people make darn sure when you buy heads they provide you with TESTED spring pressures and install height info.
the replacements were just CNC heads that I had a local machine shop install patriot springs in along with my new valves. The local machine shop gave me the tested spring rates, install height and well more info than I really cared to know
the deal is most people (including builders) just drop springs in and run but thats the problem a batch of springs can and often times vary in rates and in the case of my PAC springs were not up to spec. this vendor just dropped them in and as you see my wallet suffered
the cam Isnt anything great its a proven grind that works well on the street... 224/228 .588/.588 114+1
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Thread Starter
Joined: Sep 2005
Posts: 741
Likes: 1
From: North Little Rock, Ar
That sucks about the springs. It doesnt surprise me if they werent setup correctly though. I watched some videos on youtube yesterday showing valve float and it is crazy what goes on. I would suggest watching them and it will really open ur eyes if you have never seen it, did mine. I am just lucky i hadnt ran mine very much before learning i need to set up the springs. Thanks for the replys.
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Verdad Gallardo yep! had the installer bothered to check the spring rates and installed height none of this would have happened.
now I get to re-tune my car because it was tuned with weak springs and improper spring pressures
notice how the keepers got hammered into the retainer in my picture
now I get to re-tune my car because it was tuned with weak springs and improper spring pressures
notice how the keepers got hammered into the retainer in my picture
Last edited by 89 formula350; Sep 18, 2011 at 10:13 AM.
PAC is typically one of those manufacturers that consistently make a quality product. It's hard to believe it was a "junk" PAC beehive spring if your combo is happier with a dual spring, like the Patriots. It sounds more like it was just used in the wrong application.
There was a batch of defective PAC 1518 springs last year around Fall timeframe, possible your springs were these?
Mine are 1218 and I had them rate-checked before installation, right on the money w/ all 16 both at installed height and minus 0.551" valve lift. LS6 cam.
I also measured installed heights on all 16 prior to installation. It's run two autocrosses and a 4-session road course event without problems.
Mine are 1218 and I had them rate-checked before installation, right on the money w/ all 16 both at installed height and minus 0.551" valve lift. LS6 cam.
I also measured installed heights on all 16 prior to installation. It's run two autocrosses and a 4-session road course event without problems.
go back and read through. I had the springs tested by PAC they are bad but due to the lack of any customer loyalty I went with a different company. these springs are made for my application no doubt there so I dont know what your trying to say other than increase your post count.
what the heck are you talking about??? go back and read through. I had the springs tested by PAC they are bad but due to the lack of any customer loyalty I went with a different company.
these springs are made for my application no doubt there so I dont know what your trying to say other than increase your post count.
go back and read through. I had the springs tested by PAC they are bad but due to the lack of any customer loyalty I went with a different company. these springs are made for my application no doubt there so I dont know what your trying to say other than increase your post count.
Last edited by JS01; Sep 18, 2011 at 11:23 AM.
Are you some kind of dumbass? He's trying to say you most likely used the wrong spring for your application. PAC is one of the best spring manufacturers in the business. Just because you/your builder used the wrong spring for your setup or set them up wrong doesn't mean PAC makes a subpar product. I guarantee you used too weak a spring for whatever lobe you ran or they had your springs set up too far from coil bind and they started surging and caused the springs to lose pressure. Considering you went from a single beehive to a dual spring kit and fixed your problem proves right there that you chose the wrong spring for your combination in the beginning. I'm glad you finally got your deal running but don't blame PAC for something that wasn't their fault.
I love these guys who step in and toss a guess or two at something that was well looked into on COF
oh well every ones an expert right? got to love the internet
FYI this was not "my choice" the springs were the correct and recommended spring for this cam. its not an agressive cam by any means and was a matched setup.
nice on the pure speculation
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
I love these guys who step in and toss a guess or two at something that was well looked into on COF
oh well every ones an expert right? got to love the internet
FYI this was not "my choice" the springs were the correct and recommended spring for this cam. its not an agressive cam by any means and was a matched setup.
nice on the pure speculation
oh well every ones an expert right? got to love the internet
FYI this was not "my choice" the springs were the correct and recommended spring for this cam. its not an agressive cam by any means and was a matched setup.
nice on the pure speculation
TECH Regular
Joined: Jul 2011
Posts: 452
Likes: 2
That's what I'm thinking since I've not heard of PAC 1518s failing except for the defective batch they had as mentioned. Either that, or the springs where in coil bind for some reason, etc.
TECH Regular
Joined: Jul 2011
Posts: 452
Likes: 2
So were these PAC springs you used within their new specs? ... doesn't sound like it if you say they were tested and supposedly something was wrong. What are the details beside maybe the wrong springs were used for your setup, etc?
Last edited by ZeeOSix; Sep 18, 2011 at 11:51 PM.
Coil bind usually shows up as bent pushrods, broken rockers, or other damage to the valvetrain.
what the heck are you talking about??? go back and read through. I had the springs tested by PAC they are bad but due to the lack of any customer loyalty I went with a different company.
these springs are made for my application no doubt there so I dont know what your trying to say other than increase your post count.
go back and read through. I had the springs tested by PAC they are bad but due to the lack of any customer loyalty I went with a different company. these springs are made for my application no doubt there so I dont know what your trying to say other than increase your post count.