Just bought a 6.0 block, 370 or 408
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I parted out my Grand National and am now undertaking a turbo LSx build. Dont have a car for it yet but will probaly be buying my moms 01 Z28 back. Most likey will be working with Weber Racing on the build, already been in contact with them awhile back when this combo was going in my GN.
They suggested 370 but I was wondering what are the advatages and disadvantages from 370 vs 408 with FI. Will mostly be a weekend warrior car but road worthy
They suggested 370 but I was wondering what are the advatages and disadvantages from 370 vs 408 with FI. Will mostly be a weekend warrior car but road worthy
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Originally Posted by NA$TY-TA
I need to know what your going with... a SC or turbo????
Then we can go from there........
Then we can go from there........
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370 ???! Speed inc's shop car put down 995RWHP with a turbo on one of their 370s and ran high 8's. Car is driven to car shows and around town. Do you need more then that?
http://www.ls1speed.com/shopcar.cfm
http://www.ls1speed.com/shopcar.cfm
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Originally Posted by BIG BAD BLACKSS
370 ???! Speed inc's shop car put down 995RWHP with a turbo on one of their 370s and ran high 8's. Car is driven to car shows and around town. Do you need more then that?
http://www.ls1speed.com/shopcar.cfm
http://www.ls1speed.com/shopcar.cfm
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wow, that car is insane
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Originally Posted by BIG BAD BLACKSS
370 ???! Speed inc's shop car put down 995RWHP with a turbo on one of their 370s and ran high 8's. Car is driven to car shows and around town. Do you need more then that?
http://www.ls1speed.com/shopcar.cfm
http://www.ls1speed.com/shopcar.cfm
Then a408 would be 1200hp
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Originally Posted by BIG BAD BLACKSS
370 ???! Speed inc's shop car put down 995RWHP with a turbo on one of their 370s and ran high 8's.
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Originally Posted by dc96819
Then a408 would be 1200hp ![Grin](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_grin.gif)
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Whether on a 100ci engine or 400ci engine the turbo will only flow X amount of air. In some cases the more efficient setup is the smaller cube setup which actually will make more power then the big cubes.
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Originally Posted by BIG BAD BLACKSS
370 ???! Speed inc's shop car put down 995RWHP with a turbo on one of their 370s and ran high 8's. Car is driven to car shows and around town. Do you need more then that?
http://www.ls1speed.com/shopcar.cfm
http://www.ls1speed.com/shopcar.cfm
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for 1000rwhp, you are looking at possible head lifting issues. I'd go 370 (i like the 408 better personally) and with the money you saved over the 408, get some thicker deck heads like the AFRs or 408...oringed 317. I like the 408 for off boost daily driveability and helps spool a big t6 housed turbo,,,since its not a daily driver...370 thick deck heads and a s488 turbo...my 3 cents
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Originally Posted by NA$TY-TA
FYI My stock crank on my 370 was flexing.... ran it between 850-1000+rwhp for a YR like that.... could tell by looking at the mains....
Kyle
Kyle
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Originally Posted by NA$TY-TA
Yep and ARP studs.............
#20
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Girdle is for the block and mains if their is movement. Apparently most of the LS1's aren't having that problem. Most of the problem comes from head sealing problems.