hp increase stock 243's
12-23-2007, 10:49 PM
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hp increase stock 243's well i had posted a while back about doing a cam only setup with a ls6 intake to my 99 FRC with lg 'lt's, intake, ported tb, 180 thermo. i am on a tight budget and have a friend who is selling a set of stock 243's for 500$. two questions while i am getting the other parts installed would it be worth it to install the 243's for this price it will put me a hair over my budget but he tells me it would be worth it. if so how much will it cost to set up the 243's with the valves and retainers needed for a 224/228 113 lsa .590 lift cam. i know most will say port and polish but this is already over my budget so thats out of the question just wanted to know what gain (hp) i will see from the stock 243's with proper equipment for the cam i have. thanks!
12-23-2007, 10:53 PM
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i would say just over 400rwhp, like 410-415
I had a 224/224 .581/.581 112lsa cam in my formula and made about 375rwhp with headers and exhaust. So I would think a vette with a slightly bigger cam and intake with a set of stock 243s would be in the 410 range. I had a set of ported 243s put on later...but didnt dyno it.
I had a 224/224 .581/.581 112lsa cam in my formula and made about 375rwhp with headers and exhaust. So I would think a vette with a slightly bigger cam and intake with a set of stock 243s would be in the 410 range. I had a set of ported 243s put on later...but didnt dyno it.
12-23-2007, 10:56 PM
#3
i would say just over 400rwhp, like 410-415
I had a 224/224 .581/.581 112lsa cam in my formula and made about 375rwhp with headers and exhaust. So I would think a vette with a slightly bigger cam and intake with a set of stock 243s would be in the 410 range. I had a set of ported 243s put on later...but didnt dyno it.
I had a 224/224 .581/.581 112lsa cam in my formula and made about 375rwhp with headers and exhaust. So I would think a vette with a slightly bigger cam and intake with a set of stock 243s would be in the 410 range. I had a set of ported 243s put on later...but didnt dyno it.
I competely agree here.
12-23-2007, 11:17 PM
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evo21sl,
You don't need to change the valves on the 243 castings (LS6/LS2 heads). However, you do need to change valve springs and retainers. I'd recommend some of the new Comp 218's and be sure to install new valve seals. The other thing that you should do is install 7.4" hardened push rods to go with your new cam.
Steve
You don't need to change the valves on the 243 castings (LS6/LS2 heads). However, you do need to change valve springs and retainers. I'd recommend some of the new Comp 218's and be sure to install new valve seals. The other thing that you should do is install 7.4" hardened push rods to go with your new cam.
Steve
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12-24-2007, 01:35 PM
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thats what i am wondering i mean i know the more i spend i could make more power i could spend 2000 for a cartek 3X or 4X port job make great power just wanted to make sure that i would pick up at least 15 or more with the heads installed and tuned with a mild cam and ls6 intake i was hoping for 400 to the wheels and high elevens! current car and mods 99 FRC with lg 'lt's, intake, ported tb, 180 thermo.plans ls6 intake 224/228 113 lsa .590 lift cam, and stock ls6 heads
Last edited by evo2ls1; 12-24-2007 at 02:27 PM.
