408 guys, what CR are you runing?
#21
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Originally Posted by whitt1
How high do want to rev your 408?I don't normally take mine past 6600rpm.The wall you are hitting may not be caused by your intake.Are your heads porting stock and what valvesprings are you running?
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I got a callie crank and compstar rods mahle pistons arp everything plan on spraying 180 shot plate system nx, building a 408 i would recomend trying to get away from ne thing stock if u plan on spraying.....im running 255l wal. full racetronix fuel sys. with 42lbs svo's
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Originally Posted by jlrz28
Anyone ever tried to run a 408 on 8-9.5:1? How much power is normally left on the table that could be had from 10+? Not trying to hijack but just though it would be nice to run on cheap stuff or medium stuff.
-Lurius
PS: I looked at eagles site, and they have a prebalanced 408 kit with je pistons for 2600$ on jegs.com Might go that route.
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I'm basically wondering the same thing. Texas speed is sending me a couple 408 estimates and are telling me if i'm going to spray a 200 shot then i don't want anymore than 11:3 compression. Thunder Racing on the other hand is telling me no more than 9:5 or 10:1.
You guys running the 12:1 compressin,etc. How is it on the street? I believe one of you said you are running pump gas with it? Is that the usual case with that high of a compression? Thanks
You guys running the 12:1 compressin,etc. How is it on the street? I believe one of you said you are running pump gas with it? Is that the usual case with that high of a compression? Thanks
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Originally Posted by Cam02ss
I'm basically wondering the same thing. Texas speed is sending me a couple 408 estimates and are telling me if i'm going to spray a 200 shot then i don't want anymore than 11:3 compression. Thunder Racing on the other hand is telling me no more than 9:5 or 10:1.
You guys running the 12:1 compressin,etc. How is it on the street? I believe one of you said you are running pump gas with it? Is that the usual case with that high of a compression? Thanks
You guys running the 12:1 compressin,etc. How is it on the street? I believe one of you said you are running pump gas with it? Is that the usual case with that high of a compression? Thanks
#32
How about RWHP numbers? I am in the process of buying parts for my 408 build up. Iron block, and forged internals. Staing around 11.0:1 to 11.5:1. Will be running ETP 240 heads. I think I will gernade my six speed for this one.