Cam selection help?
11-05-2012, 09:40 AM
#1
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Cam selection help? I did some searching but I didn't really come up with any concrete info, and the threads were getting pretty old so I don't if anything's changed since 2004.
The car is bone stock engine, stock gears, M6 trans, has about 20kmi on it. I will be adding LTs and a Y (not sure of cats or not, yet). I want to leave everything else stock, including the stock cat back which is the SLP CME exhaust (same muffler as the Dual Dual system).
The car is a 100% street car, it will likely never see a dragstrip while I own it. It also gets driven year round in upstate NY, so cold weather needs to be factored in. I want to KNOW that I put a cam in it, so I don't want anything with a stock-like idle, but at the same time I don't want to sound like a top fuel car, either (I don't think I would with my exhaust, and I don't think anyone will suggest a crazy cam with stock heads, anyway). I also want something that's going to be easy on the valvetrain. I also don't rev the **** out of it, so something with a big fat midrange is what I want (if I shift at 5k it's pretty high for me).
I know it's the easy choice, but what I *think* I want is just a run of the mill TR224. I'm not sure of the LSA as I'm getting conflicting opinions on where the power will be. I *think* I'd want 112 as it's supposed to bring the power down in the rev range a little, but I've read some people say it will also give up some low-end torque as well. Would a 114 be better for me?
Would stock heads be able to take advantage of the TSP 224R (or even the 228R)? More lift, but a less aggressive lobe, not sure if it would be any easier on the springs.
Should I be considering something like the TSP 233/239? Or is that too much cam for stock heads?
Sorry for the newb question and thanks in advance for any help.
The car is bone stock engine, stock gears, M6 trans, has about 20kmi on it. I will be adding LTs and a Y (not sure of cats or not, yet). I want to leave everything else stock, including the stock cat back which is the SLP CME exhaust (same muffler as the Dual Dual system).
The car is a 100% street car, it will likely never see a dragstrip while I own it. It also gets driven year round in upstate NY, so cold weather needs to be factored in. I want to KNOW that I put a cam in it, so I don't want anything with a stock-like idle, but at the same time I don't want to sound like a top fuel car, either (I don't think I would with my exhaust, and I don't think anyone will suggest a crazy cam with stock heads, anyway). I also want something that's going to be easy on the valvetrain. I also don't rev the **** out of it, so something with a big fat midrange is what I want (if I shift at 5k it's pretty high for me).
I know it's the easy choice, but what I *think* I want is just a run of the mill TR224. I'm not sure of the LSA as I'm getting conflicting opinions on where the power will be. I *think* I'd want 112 as it's supposed to bring the power down in the rev range a little, but I've read some people say it will also give up some low-end torque as well. Would a 114 be better for me?
Would stock heads be able to take advantage of the TSP 224R (or even the 228R)? More lift, but a less aggressive lobe, not sure if it would be any easier on the springs.
Should I be considering something like the TSP 233/239? Or is that too much cam for stock heads?
Sorry for the newb question and thanks in advance for any help.
11-05-2012, 10:16 AM
#2
I think a 224R would be great for your goals. You'll need new springs and pushrods regardless. Stock PR's are like limp spaghetti noodles to begin with, with lots of folks discovering bent rods just from stock cams.
112 will give you the chop you want.
That 233/239 is too big, IMHO. You'd want gears and free flowing exhaust (think duals). W/o gears that cam will be a dog down low; IE anything below say 3600 or so. You have to ask yourself, what RPM range does your car spend most of it's time?
112 will give you the chop you want.
That 233/239 is too big, IMHO. You'd want gears and free flowing exhaust (think duals). W/o gears that cam will be a dog down low; IE anything below say 3600 or so. You have to ask yourself, what RPM range does your car spend most of it's time?
11-05-2012, 10:33 AM
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It's a rare day if I rev it past 3600, so that cam is out. Thanks for the help. The 224R was my original choice, but the gleaming reviews of the TR224 have caused me to revisit it.
11-05-2012, 10:44 AM
#4
Feel free to do business with Thunder Racing, but I absolutely EMPLORE you to read through this section first.
https://ls1tech.com/forums/ls1tech-sponsor-feedback-70/
https://ls1tech.com/forums/ls1tech-sponsor-feedback-70/
11-05-2012, 03:29 PM
#6
IMO, take a look also at the Futral F4 an F5 with a 112lsa.
http://www.futralmotorsports.com/fms....asp?pf=1&pg=5
If you want Comp Cam lobes then a custom, 226(.605")/226(.605") 112lsa+4 with LXL lobes will be easy on the springs with it's softer closing ramp rates.
http://www.futralmotorsports.com/fms....asp?pf=1&pg=5
If you want Comp Cam lobes then a custom, 226(.605")/226(.605") 112lsa+4 with LXL lobes will be easy on the springs with it's softer closing ramp rates.
Last edited by 99Bluz28; 11-05-2012 at 03:43 PM.
11-06-2012, 08:43 AM
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That F5 looks interesting - what does the shorter intake and longer exhaust duration give you over a symmetrical profile? Is that what lowers the RPM range down a little over the F4?
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11-06-2012, 04:16 PM
#8
The longer exh duration on the 224/228 allows the trq to peak at a higher rpm than with a 224/224. FYI if you want to go with the 226/226, but don't want the power to peak a a higher rpm then go with the 226/226 112 so it'll peak just slightly lower then with the 224/224 or 224/228 with a 114lsa.
11-08-2012, 01:45 PM
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Streetsweeper HT seems like a good choice from the reviews on this site, seems like I'd need some heavier duty springs with that kind of lift.
Being a street car with some pretty "typical" mods, would a canned or mail-order tune suffice since I'm not looking for absolute peak power output?
Being a street car with some pretty "typical" mods, would a canned or mail-order tune suffice since I'm not looking for absolute peak power output?
11-08-2012, 06:48 PM
#16
Crane also makes a nice 228/232 112lsa cam if you decide to go with a 228/232 cam.
http://www.ws6project.com/user_stor/...28-232-112lsa/
http://www.ws6project.com/user_stor/...28-232-112lsa/
11-08-2012, 09:45 PM
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I know the lobes are going to be different (that FTI 228/232 is an Ed Curtis cam, from what I can read), but those specs are almost identical. The FTI has just a hair more lift and one degree less LSA.
11-08-2012, 09:48 PM
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So my next Z28 i want to do a Cam/full exhaust. What do you think about this cart? 
Should get me 400rwhp, no? (Assume i have the LS6 intake)
Should get me 400rwhp, no? (Assume i have the LS6 intake) Last edited by slikrider20; 11-08-2012 at 10:03 PM.
