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408 cam

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Old Dec 24, 2006 | 12:34 PM
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Default 408 cam

Would a g5x4 be good on a 408 with etp heads? or somthing else?
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Old Dec 24, 2006 | 12:44 PM
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what are the specs of thta cam
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Old Dec 24, 2006 | 12:46 PM
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or just more info period
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Old Dec 24, 2006 | 01:16 PM
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I do not no the specs lg does not say. The car is a 6speed its heads and cam right now,the stock bottom has some blow by. I had a Procharger on it with differant heads and cam and blew a head gasket I sold the Procharger and went with ETP heads and a Track cam from Thunder racing, now I think it may have broken rings, So now I am thinking of a ls2 408 and was going to change cams anybody have some suggestion on a cam? I thought about trying a G5X4.
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Old Dec 24, 2006 | 09:07 PM
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I would NEVER buy a cam that I don't know the specs on!!! I mean if you don't know the specs how do you figure your DCR? I'm having a 408 built and I just got a Comp XER 244/248 .612/.615 112+2. This cam seems to be pretty popular on this site.
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Old Dec 24, 2006 | 11:14 PM
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Call Thunder and have them custom spec you a cam. G5x- series is designed for stock cubic inch motors.
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Old Dec 24, 2006 | 11:29 PM
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Originally Posted by bigdsz
I would NEVER buy a cam that I don't know the specs on!!! I mean if you don't know the specs how do you figure your DCR? I'm having a 408 built and I just got a Comp XER 244/248 .612/.615 112+2. This cam seems to be pretty popular on this site.
yea thats the cam i have for my 408
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Old Dec 25, 2006 | 12:12 AM
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Geoff at Thunder has always tuned both my cars and helped with my set ups he is awesome. thanks for the help, I going to stay with Thunder for cams, I have had 3 of them. Aluminum or iron 6.0 block? what is better
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Old Dec 25, 2006 | 12:16 PM
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Just make sure your running fair amount of compression, alot of these 408 cams have a very late closing, great for peak power, but a dog if you have under 11.5 SCR.
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Old Dec 25, 2006 | 02:46 PM
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Thanks, I won't high compression for sure.
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Old Dec 25, 2006 | 05:04 PM
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I went with TSP's 257/266, .646/.622, and 113 lsa. (mines 11.3:1 CR)
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Old Dec 26, 2006 | 11:53 AM
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Originally Posted by slmdLS1
I went with TSP's 257/266, .646/.622, and 113 lsa. (mines 11.3:1 CR)
how do you like that cam and who built your 408? i'm in the process of doing a 408 so i'm just getting ideas
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Old Dec 26, 2006 | 01:51 PM
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Not to hijack,but Fraser, on a 408 build my 5.3L heads are 63cc, am I better off with -8cc Wiseco at 11.4SCR or -10cc at 11.1SCR? I live in Florida and my friend nuked his engine, #7 piston, this past summer 11.7SCR. I'm paranoid these days. My DCR will be somewhere around 8.1
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Old Dec 26, 2006 | 02:21 PM
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thunder racing is who designed my cam, based it on another car they had in there and the cam worked amazling well on the low end and still shined on the top end like its built for.
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Old Dec 26, 2006 | 06:49 PM
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Originally Posted by Cam02ss
how do you like that cam and who built your 408? i'm in the process of doing a 408 so i'm just getting ideas
TSP built my 408. i cant tell you much about it(the cam), im still working on swapping parts over to get the motor in. i only get a couple hours a week to begin with and the holidays are killin my motor time. im also doing a fuel pump, and 9" as well.
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Old Dec 26, 2006 | 08:48 PM
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Originally Posted by bigdsz
Not to hijack,but Fraser, on a 408 build my 5.3L heads are 63cc, am I better off with -8cc Wiseco at 11.4SCR or -10cc at 11.1SCR? I live in Florida and my friend nuked his engine, #7 piston, this past summer 11.7SCR. I'm paranoid these days. My DCR will be somewhere around 8.1
Myself? i'd go with Diamond -2cc pistons, MLS gaskets and 63cc heads, calculating mentally i'm finding 12.1 SCR.

Alot of people seam to damage #7 on nitrous, we havn't had issue with that IIRC.
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Old Dec 31, 2006 | 05:25 PM
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Originally Posted by bigdsz
I would NEVER buy a cam that I don't know the specs on!!! I mean if you don't know the specs how do you figure your DCR? I'm having a 408 built and I just got a Comp XER 244/248 .612/.615 112+2. This cam seems to be pretty popular on this site.
I have the same cam and I made 535rwhp NA w/26* of timing and my comp is around 12.5 comp. It is a 414ci iron block
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