Would Rev-1116s be too much spring pressure for a Thunder 220 or 224 cam?
11-02-2002, 06:40 PM
#1
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Would Rev-1116s be too much spring pressure for a Thunder 220 or 224 cam? Someone suggested to me recently that the Rev-1116 doubal springs may have too much spring pressure for use with a TR220 or TR224 cam.
My plan is to use stock heads (until I can afford some GTPS.) My main concern is because I hear people talking about 918s and other single-coil springs losing pressure and needing to be changed in 10000-15000 miles with high-lift cams. This car is a daily driver which I put a LOT of miles on and I want my springs to last a good long time. Plus I can't afford to be dropping valves.
Is his advice well-founded? Should I go with Comp 918s instead? The money-difference is not an issue. I do not want to skimp on valvetrain parts. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
My plan is to use stock heads (until I can afford some GTPS.) My main concern is because I hear people talking about 918s and other single-coil springs losing pressure and needing to be changed in 10000-15000 miles with high-lift cams. This car is a daily driver which I put a LOT of miles on and I want my springs to last a good long time. Plus I can't afford to be dropping valves.
Is his advice well-founded? Should I go with Comp 918s instead? The money-difference is not an issue. I do not want to skimp on valvetrain parts. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
11-03-2002, 10:59 AM
#2
Re: Would Rev-1116s be too much spring pressure for a Thunder 220 or 224 cam? What is the opened and closed spring pressure on the REV-1116's?
Well need to know that first.
I don't think the spring pressures would affect the cam.
Hydraulic lifters can collaspe with excessive spring pressures but I think the stock lifters will work with spring pressures over 300 lbs.
Maybe someone in the know can chime in...
Well need to know that first.
I don't think the spring pressures would affect the cam.
Hydraulic lifters can collaspe with excessive spring pressures but I think the stock lifters will work with spring pressures over 300 lbs.
Maybe someone in the know can chime in...
11-03-2002, 11:34 AM
#3
Re: Would Rev-1116s be too much spring pressure for a Thunder 220 or 224 cam? using the search feature... https://ls1tech.com/ubb/cgi-bin/ulti...=007133#000000 provides a good amount of information about these springs.
I've been using them for 2500 miles on my 224/224 .581/.581 112LSA cam with now problems at all. I don't think anyone has had them on for that duration of time (10-15k miles), I myself will be pulling a few springs at that time, provided the heads stay on the car that long, and will take them to be tested and see how they're holding up.
I don't know about the TR220, but the TR224 is a relatively aggressive cam and is on the border limit of all these replacement springs that don't require machining. If you can't afford the time, money, or desire to do something as small as a spring change every 15,000 miles, then you may want to talk to a shop and find a cam with less lift and less aggressive lobes that will be easier on the springs.
As for sucking a valve... that's just the luck of the draw... there was a bad batch of CC947's that did it.. then there was a bad batch of CC918's that did it... you could buy a set of REV-1116 springs and have one break and suck a valve. *I* decided to gamble with the REV springs because of the inner spring they have. I figured that if the outer spring broke, the inner would hold the valve up enough for me to hobble the car off the road.
With all that said... I like the REV-1116 package with the A&A retainer/seat kit. Though they are a PITA to install. Should you get them I would suggest getting the spring compressor that MORE Performance sells (rocker stud mounted, uses a ratchet, and is 130 bucks). It would make it MUCH easier versus the normal 'crank down' spring compressor since they will not catch the inner spring (It was a b*tch, that's the only way I can describe it). I plan on buying one of these compressors in the near future to use for future work.
I've been using them for 2500 miles on my 224/224 .581/.581 112LSA cam with now problems at all. I don't think anyone has had them on for that duration of time (10-15k miles), I myself will be pulling a few springs at that time, provided the heads stay on the car that long, and will take them to be tested and see how they're holding up.
I don't know about the TR220, but the TR224 is a relatively aggressive cam and is on the border limit of all these replacement springs that don't require machining. If you can't afford the time, money, or desire to do something as small as a spring change every 15,000 miles, then you may want to talk to a shop and find a cam with less lift and less aggressive lobes that will be easier on the springs.
As for sucking a valve... that's just the luck of the draw... there was a bad batch of CC947's that did it.. then there was a bad batch of CC918's that did it... you could buy a set of REV-1116 springs and have one break and suck a valve. *I* decided to gamble with the REV springs because of the inner spring they have. I figured that if the outer spring broke, the inner would hold the valve up enough for me to hobble the car off the road.
With all that said... I like the REV-1116 package with the A&A retainer/seat kit. Though they are a PITA to install. Should you get them I would suggest getting the spring compressor that MORE Performance sells (rocker stud mounted, uses a ratchet, and is 130 bucks). It would make it MUCH easier versus the normal 'crank down' spring compressor since they will not catch the inner spring (It was a b*tch, that's the only way I can describe it). I plan on buying one of these compressors in the near future to use for future work.
11-03-2002, 02:25 PM
#4
Re: Would Rev-1116s be too much spring pressure for a Thunder 220 or 224 cam? My brother in law has the REV1116 springs from A&A on his 5.3ltruck with a Comp Cams 214º with .559" lift. He has over 30,000 miles since installing the heads and cam and drives the truck daily. He drives the truck like it was stolen everywhere he goes. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" /> Rev limited at 6400rpm and not a single problem with the dual springs. I honestly don't expect to see any problems with the 1116 springs in daily driven applications with valve lifts of up to .600".
Hope this helps,
Richard <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Hope this helps,
Richard <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
11-04-2002, 09:25 PM
#5
Re: Would Rev-1116s be too much spring pressure for a Thunder 220 or 224 cam? Sure the car would run fine probably, might have a chance of colapsed lifter, but consider this. When you have a bunch more spring pressure than you need, you are inducing parasitic loss. Have you ever seen a car pick up 25 hp from a valvespring change <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Id say 915 or 918
Id say 915 or 918