Ok I am confused 918 springs or 921 springs
01-26-2007, 06:26 PM
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Ok I am confused 918 springs or 921 springs Ok I am confused 918 springs or 921 springs for a TSP 231/237 cam on a 112 lsa. Also I wanted to know if this will work with the stock gear or if I am going to need the 410 gear if so is there is another cam with good mid range and top end HP and Torque that will work with the 918 springs and that I will not need to get a 410 gear for. Also those springs are expensive the 921s are like 599 thats more than the cam costs. Just dont want to f@ck this up and get the wrong stuff for my set up. My set up is in the signature. I might just get some heads to go with my existing cam I am getting confused?????
01-26-2007, 06:44 PM
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I don't know what the lift specs are on that cam since you didn't post them...what i do know is that I know some tuners don't like to run 918's above .580 even though they are rated to someting like .600-.610. So i would guesstimate that 921's would be the better choice.
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01-26-2007, 06:53 PM
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Originally Posted by marcdez
Ok I am confused 918 springs or 921 springs for a TSP 231/237 cam on a 112 lsa. Also I wanted to know if this will work with the stock gear or if I am going to need the 410 gear if so is there is another cam with good mid range and top end HP and Torque that will work with the 918 springs and that I will not need to get a 410 gear for. Also those springs are expensive the 921s are like 599 thats more than the cam costs. Just dont want to f@ck this up and get the wrong stuff for my set up. My set up is in the signature. I might just get some heads to go with my existing cam I am getting confused?????
01-26-2007, 07:02 PM
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The cam is 231/237.598/.595 and the car is a 6 speed. Ok I am starting to get the picture. So if I dont want to get a gear maybe I should get a cheatr cam that way I wont have to get the gear to get to the HP and it is still a little bigger than my lingenfelter GT2-3 cam that I have installed now.
01-26-2007, 07:12 PM
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I just bought the cam that you are talking about, the 231/237 and I think the lift is .595/.598. Im going to use the 918's with mine. From what I understand this cam has fairly mild ramp rates and should work just fine with those springs. The springs are actually capable of more than there advertised lift maximum. I think there good for .605-.610. As far as gears go, I think Im going to go with 4.10's, but Im gonna wait till the cam's in and see how it drives.
01-26-2007, 07:14 PM
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Originally Posted by marcdez
Ok I am confused 918 springs or 921 springs for a TSP 231/237 cam on a 112 lsa. Also I wanted to know if this will work with the stock gear or if I am going to need the 410 gear if so is there is another cam with good mid range and top end HP and Torque that will work with the 918 springs and that I will not need to get a 410 gear for. Also those springs are expensive the 921s are like 599 thats more than the cam costs. Just dont want to f@ck this up and get the wrong stuff for my set up. My set up is in the signature. I might just get some heads to go with my existing cam I am getting confused?????
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01-26-2007, 07:16 PM
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Originally Posted by marcdez
The cam is 231/237.598/.595 and the car is a 6 speed. Ok I am starting to get the picture. So if I dont want to get a gear maybe I should get a cheatr cam that way I wont have to get the gear to get to the HP and it is still a little bigger than my lingenfelter GT2-3 cam that I have installed now.
01-26-2007, 07:37 PM
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Originally Posted by Jasonscott
I just bought the cam that you are talking about, the 231/237 and I think the lift is .595/.598. Im going to use the 918's with mine. From what I understand this cam has fairly mild ramp rates and should work just fine with those springs. The springs are actually capable of more than there advertised lift maximum. I think there good for .605-.610. As far as gears go, I think Im going to go with 4.10's, but Im gonna wait till the cam's in and see how it drives.
Let me know how that goes if you can I would appreciate it.
01-27-2007, 01:11 AM
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If you go with that 231/237 TSP cam you would be a FOOL in my opinion to run 918s and you CERTAINLY would want to run an excellent battle tested dual spring such as the PRC Golds, Patriot Golds, COmp 921s. 918s are great for less agressive cam but that cam has a fairly agressive street cam and you NEED DUAL SPRINGS for protection against having a second spring hold up the valve if a spring breaks. Good cheap insurance and the PRCs Gold and Patriots are very reasonably priced!!
01-27-2007, 03:22 AM
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Originally Posted by MTI 427 C5 Roadster
If you go with that 231/237 TSP cam you would be a FOOL in my opinion to run 918s and you CERTAINLY would want to run an excellent battle tested dual spring such as the PRC Golds, Patriot Golds, COmp 921s. 918s are great for less agressive cam but that cam has a fairly agressive street cam and you NEED DUAL SPRINGS for protection against having a second spring hold up the valve if a spring breaks. Good cheap insurance and the PRCs Gold and Patriots are very reasonably priced!!
Do you speak from experience or net phobia.First of all the 231/237 is a LUNATI grind with less agressive ramps than XE-R
918's can handle much more than that (I've ran a .612 lift XE-R for 17K miles on these) and pulls till 6800rpm.
So please stop this nonsense
01-27-2007, 10:55 AM
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Originally Posted by PREDATOR-Z
Do you speak from experience or net phobia.First of all the 231/237 is a LUNATI grind with less agressive ramps than XE-R
918's can handle much more than that (I've ran a .612 lift XE-R for 17K miles on these) and pulls till 6800rpm.
So please stop this nonsense
You are right that 918s are excellent springs and are battle tested but I do know a couple of people who broke a 918 with a cam with less lift than the TSP one he references, and a valve dropped fragging his entire motor) and why not have the insurance and better piece of mind of an excellent battle tested very AFFORDABLE dual spring with a .600 lift cam for insurance and to minimize the chance of a valve dropping if you break a spring!!
As far as being the resident cam expert that I am not and that would BE YOU, and I say that will all sincerity as you have even helped me out quite a bit in specing out a nice blower cam about thist time last year and thank you for all your help with that
Last edited by MTI 427 C5 Roadster; 01-27-2007 at 05:47 PM.
01-27-2007, 11:01 AM
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Originally Posted by MTI 427 C5 Roadster
I speak from experience only in the sense that I have broken dual valve springs before on a heads/cam C5 and the valve did not drop and I was in good shape after getting them replaced.
You are right that 918s are excellent springs and are battle tested but of course i know a couple of people personally who broke one with a cam with less lift than the TSP one he references, and why not have the insurance and better piece of mind of an excellent battle tested very AFFORDABLE dual spring with a .600 lift cam for insurance and to minimize the chance of a valve dropping if you break a spring!!
As far as being the resident cam expert that I am not and that would be you and I say that will all sincerity as you have even helped me out quite a bit in specing out a nice blower cam about thist time last year and thanks!
You are right that 918s are excellent springs and are battle tested but of course i know a couple of people personally who broke one with a cam with less lift than the TSP one he references, and why not have the insurance and better piece of mind of an excellent battle tested very AFFORDABLE dual spring with a .600 lift cam for insurance and to minimize the chance of a valve dropping if you break a spring!!
As far as being the resident cam expert that I am not and that would be you and I say that will all sincerity as you have even helped me out quite a bit in specing out a nice blower cam about thist time last year and thanks!
It is just that Newbs take such comments seriously. 918's are darn good springs and IMO, unless you have too, those are the ones to run.
Glad to hear that your huffer is making serious power.
01-27-2007, 11:14 AM
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Originally Posted by PREDATOR-Z
My apologies if I sounded harsh, but I wasn't.
It is just that Newbs take such comments seriously. 918's are darn good springs and IMO, unless you have too, those are the ones to run.
Glad to hear that your huffer is making serious power.
It is just that Newbs take such comments seriously. 918's are darn good springs and IMO, unless you have too, those are the ones to run.
Glad to hear that your huffer is making serious power.
Z in the house!
01-27-2007, 12:51 PM
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Originally Posted by PREDATOR-Z
My apologies if I sounded harsh, but I wasn't.
It is just that Newbs take such comments seriously. 918's are darn good springs and IMO, unless you have too, those are the ones to run.
Glad to hear that your huffer is making serious power.
It is just that Newbs take such comments seriously. 918's are darn good springs and IMO, unless you have too, those are the ones to run.
Glad to hear that your huffer is making serious power.
Last edited by MTI 427 C5 Roadster; 01-27-2007 at 05:46 PM.
01-27-2007, 01:41 PM
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Originally Posted by PREDATOR-Z
That cam is a dawg without proper supporting mods.
Go with a TR230/224 111lsa, much better suited for the task and you can run 918's with that one all day..
Go with a TR230/224 111lsa, much better suited for the task and you can run 918's with that one all day..
01-27-2007, 02:08 PM
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It's so nice to see everyone getting along, so well. 
427 I have seen stock vehicles saved by the inner spring before. I think a car with a bigger cam and high revs, might not fare so well if a spring breaks. I could be wrong.
427 I have seen stock vehicles saved by the inner spring before. I think a car with a bigger cam and high revs, might not fare so well if a spring breaks. I could be wrong.
01-27-2007, 06:59 PM
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Just wanted to say thanks for all the help I did some more reasearch and called and ordered this cam 99-TR230/224-111 Thunder Racing Custom "Reverse Split" Camshaft - 230/224 .575/.563 111 LSA 2200-6800 RPM Power Band. Excellent mid-range & high RPM power. Automatic cars require computer tuning and it is recommend for optimum results on manual transmission cars
it is going to be about a monh or 2 until I install it I need to get a new clutch to but thats going to be another thread. After I get it installed and tuned I will post the numbers on this thread. Thaks again for all the help especially pedator-z
it is going to be about a monh or 2 until I install it I need to get a new clutch to but thats going to be another thread. After I get it installed and tuned I will post the numbers on this thread. Thaks again for all the help especially pedator-z