is my turbo to small for my goals?
06-13-2010, 07:53 PM
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is my turbo to small for my goals? thinking my turbo will be to small for my goals i wanted to see if i could push my little 346 into the 850 wheel range but im beggining to think thatll itll be to small for that...
its a fully forged 346 with afr 225s and a precision t76gts with a .96 ar exhaust its through a 6 speed and a 12 bolt with 3.90s i was planning on running 16-20 pounds but dont know if itll make it to that
if so about what will it max at
its a fully forged 346 with afr 225s and a precision t76gts with a .96 ar exhaust its through a 6 speed and a 12 bolt with 3.90s i was planning on running 16-20 pounds but dont know if itll make it to that
if so about what will it max at
06-13-2010, 08:09 PM
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https://ls1tech.com/forums/forced-in...ame-motor.html
with a 78GTS, he made 811 at the wheels on a 355 LT1. 850 will probably be maxing it out on an ls1
with a 78GTS, he made 811 at the wheels on a 355 LT1. 850 will probably be maxing it out on an ls1
06-13-2010, 10:29 PM
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Id really like to see a compressor map of the 76mm to see where it makes majority of its airflow at. I know they can flow alot of air but the problem is the v8 pulls so much air the pressure ratio stays on the low side of the turbo and alot of big turbos dont flow well at low pressure ratios. I think youll be ok for 750-800hp though.
06-14-2010, 05:35 AM
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The turbine a/r is fine, its the actual flow rate of the compressor that could limit the power. Heres a picture of a compressor map and ill try to explain what i mean.
This is of a different turbo but its just to show the effeciency. Lets say it takes a 347c.i. 10psi to have 600hp, that roughly means you need 60 lbs of air @ 10psi. The pressure ratio would be, the pressure you want to run + 14.7 which is absolute pressure then divide by 14.7. So it would be 10 + 14.7 = 24.7 / 14.7 = 1.68. Look at where 1.68 pressure ratio is on the map and see where 60 lbs of air is. With this turbo you will be almost out of the compressor effeciency with just 10psi and 600hp. And thats with a turbo rated to 800hp.
This is of a different turbo but its just to show the effeciency. Lets say it takes a 347c.i. 10psi to have 600hp, that roughly means you need 60 lbs of air @ 10psi. The pressure ratio would be, the pressure you want to run + 14.7 which is absolute pressure then divide by 14.7. So it would be 10 + 14.7 = 24.7 / 14.7 = 1.68. Look at where 1.68 pressure ratio is on the map and see where 60 lbs of air is. With this turbo you will be almost out of the compressor effeciency with just 10psi and 600hp. And thats with a turbo rated to 800hp.
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06-14-2010, 04:31 PM
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http://gonicd.com/camaroindex.html
He was a t56 before and made over 800 on 16 psi. He has a dyno sheet on the web page.
He was a t56 before and made over 800 on 16 psi. He has a dyno sheet on the web page.
Hasn't been run yet.