Need some expert valvetrain guidance
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Joined: Jun 2002
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From: Las Vegas, NV
Need some expert valvetrain guidance Fellas, I really need some help. My car is apart right now and I'm about to install some PP ported 243 heads with .650 Patriot double springs already installed in the heads (and some ARHs but that's beside the point). I have a TR224/112 cam already installed.
My question is about rockers and springs. It seems I have three options:
1) Install Harland-Sharpe 1.8s (which I already have), but I'm worried, as Predator-Z mentioned, that I would be making a mistake because Thunder Racing does not recommend 1.8s with their fast rate cams. I thought that the Patriot .650 double springs could handle it though.
2) Remove the Patriot double springs from the new 243 heads and install the 918s I have on my LS1 heads and just use stock rockers.
3) Or this was recommended by Predator-Z that I could use Crane Gold 1.8 Variable Rate rockers but this would set me back about $700.00, and I already have the H-S 1.8s and stock rockers.
What should I do out of these options? I'm leaning towards biting the bullet and getting some Crane Variable Rate rockers, but I'm not thrilled about spending another $700.00. What would you guys do? Thanks.
My question is about rockers and springs. It seems I have three options:
1) Install Harland-Sharpe 1.8s (which I already have), but I'm worried, as Predator-Z mentioned, that I would be making a mistake because Thunder Racing does not recommend 1.8s with their fast rate cams. I thought that the Patriot .650 double springs could handle it though.
2) Remove the Patriot double springs from the new 243 heads and install the 918s I have on my LS1 heads and just use stock rockers.
3) Or this was recommended by Predator-Z that I could use Crane Gold 1.8 Variable Rate rockers but this would set me back about $700.00, and I already have the H-S 1.8s and stock rockers.
What should I do out of these options? I'm leaning towards biting the bullet and getting some Crane Variable Rate rockers, but I'm not thrilled about spending another $700.00. What would you guys do? Thanks.
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Joined: Jun 2002
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From: Las Vegas, NV
Just to add, a fourth option would be to just use my stock rockers with the Patriot .650 double springs (which are already installed in the new heads), but I didn't consider this as an option because the TR224/112 cam only has .563 lift, and I assumed that the .650 double springs would be too much spring.
Anyone? I need to make a decision. Thanks.
Anyone? I need to make a decision. Thanks.
1.8 rockers will accelerate the valves much faster and put much higher demands on your valve train. There is someone in MA who is running the Crane 1.8's (don't remember handle) but Slowhawk (Don) knows him. He has a blue Z06. He might be able to give you some first hand feedback. Personally, I think I would opt to the 1.7's with that cam and keep the springs you have.
Thread Starter
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Joined: Jun 2002
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From: Las Vegas, NV
1.8 rockers will accelerate the valves much faster and put much higher demands on your valve train. There is someone in MA who is running the Crane 1.8's (don't remember handle) but Slowhawk (Don) knows him. He has a blue Z06. He might be able to give you some first hand feedback. Personally, I think I would opt to the 1.7's with that cam and keep the springs you have.
So did you mean just run the stock 1.7 rockers with the Patriot 243s and .650 double springs?
Thanks again!
I would put the stock rocker back on and sell the 1.8's. I wouldnt run those on anything but a stock cam. Thats just my .02. Predator I live 10 mins away from Worcester and I am doing a H/C/I swap right now. If you need a hand let me know. I have ARH headers they are easy as hell to install.
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From: Las Vegas, NV
I would put the stock rocker back on and sell the 1.8's. I wouldnt run those on anything but a stock cam. Thats just my .02. Predator I live 10 mins away from Worcester and I am doing a H/C/I swap right now. If you need a hand let me know. I have ARH headers they are easy as hell to install.
I'm going to use the stock rockers, thanks for the heads up.
I'm at the point where I have my old y-pipe and JBA headers removed, manifold, coil packs, valve covers off. Next I have to remove the water pump, power steering pump, belts and install my UD pulley. Then remove the heads, install new heads, valvetrain, and the ARHs.
I really appreciate the offer to help, and the same offer applies to you, but I'm all set at the moment. I'm just cleaning everything up now, the manifold, valve covers and engine compartment. I should be all set but if I get stuck I'll drop you a PM. Same to you, anything I can do to help give me a holler. Jeff @ 508-791-5758, I live on Monteforte St. in Worcester, off Grafton St. near
route 20.
Glad to hear about the ARHs being easy to install. Just wondering, how high did you have to raise the front of the car to slide them in?
Thanks again!
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From: Las Vegas, NV
That sounds like a plan. I'm going real slow on my install but I should be done by the end of this week, or early next week. I have to tune it too.
You got my number, call anytime. Nice talking to you, and thanks again for the help!
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