what A/R should i get

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Jan 14, 2003 | 02:26 AM

OOsilverado

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From: CA

what A/R should i get

at first i was planning on using a T3/T4 turbo with a .6 compressor and .48 turbine. but after researching i think i should maybe step the turbine side up to a .6 as well. what do you guys think?

Jan 14, 2003 | 11:37 PM

y2khawk

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From: Olmsted Falls, OH

Re: what A/R should i get

YIKES!! .48 <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

They'll spool faser than you know what to do with, but choke off the motor before you make any decent power.

.6 atleast. Mine are .86 on a T25'ish hot side. And i have a feeling they are beginning to limit me. But then again, i'm insane <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

.6 will be a better choice IMO

Jan 15, 2003 | 01:20 AM

OOsilverado

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From: CA

Re: what A/R should i get

this is a twin turbo setup

would you still say get .6?

i wasnt sure if you knew that at first

Jan 15, 2003 | 01:43 PM

Phate

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From: Northridge, CA

Re: what A/R should i get

Ryan,

FYI...Harlan's car is a twin turbo as well, so I think that is where his advice was coming from <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Scott

Jan 16, 2003 | 02:38 PM

TchargedLS1TA

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From: Temple, TX

Re: what A/R should i get

NEVER question the almighty single digit LS1 owners....

Jan 16, 2003 | 09:12 PM

OOsilverado

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From: CA

Re: what A/R should i get

i wasnt questioning i just didnt know if he knew.

i think i may go for the .83 a/r now, but its still a toss up between that and the .6 now

Jan 17, 2003 | 01:06 AM

MelloYellow

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From: Centrifugal City

Re: what A/R should i get

What does A/R stand for? Something Ratio?

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Jan 17, 2003 | 02:16 AM

y2khawk

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From: Olmsted Falls, OH

Re: what A/R should i get

<blockquote>quote:<hr />Originally posted by TchargedLS1TA:
 NEVER question the almighty single digit LS1 owners.... <hr /></blockquote>And what exactly is that all about??

Yes, A/R is the ratio of the cross sectional area of the housing scroll vs the radius out on the turbine or compressor wheel.

In the simplest terms, it impacts the speed of the turbine. The smaller the A/R the less exhaust flow it takes to make a certain turbine and thus compressor speed. Small A/R spool fast, but are limited in their flow capacity.

And yes, I was aware you're putting together a twin setup.