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Discussion Starter · #1 ·
i am just looking for a to the point answer on what size of a turbo i would need to make a twin setup utilizing the stock turbo as the primary and if the secondary turbo needs to be waste gated and what not

thanks
 

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Discussion Starter · #4 ·
trans is being done before the summer weather arrives up here lol then the rest of the mods
 

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most use a S400 turbo as tyler said. i have seen people use S471 up to S480 and some have gone much bigger on high HP setups. using a stock high pressure turbo though a S475 is probably your best bet
 

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Discussion Starter · #7 ·
i have a buddy that runs a cummins and he said to look into a ht3b turbo. it is basically the same specs as the s471-s480 sizes with a 1.2 or 1.32 ar and it runs a t-6 housing as well. any thoughts??
 

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Cummins guys use that turbo a lot. It is not much cheaper than an S474 and IIRC does not have the ETT that the S474 can have.
 

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Discussion Starter · #9 ·
so the best turbo for a setup like this would be an s474 or s475 then??
 

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The S475 works well with the 1.32 ar exhaust housing like Durallymax mentioned.
 
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