Turbo experts step inside... 69mm or 80mm?

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May 2, 2014 | 07:13 PM

SPOOLED UP

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From: STL

Turbo experts step inside... 69mm or 80mm?

WHICH TO GET AND WHY?

FOR A STREET STRIP CAR THAT WILL BE DRIVEN EVERYWHERE

STOCK 5.3 BOTTOM END
STOCK 706 HEADS WITH 1218 SPRINGS
TU1 CAM 228/228, LIft is .571/.571, and is on a 112LSA
HURON SPEED TURBO KIT
LS6 INTAKE 3BAR MAP SENSOR STOCK T.B

BUILT TH400 ON THE BRAKE WITH PTC TURBO STALL (SPEC FOR THIS BUILD)

3.23 GEARED ON 26" TIRES

TWIN PUMPS ON 93 AND METH

1/4 MILE CAR AND YES STREET DRIVEN.

Both t4 flanges

trim 69mm with 1.05 a/r 3.5v band outlet 77mm exducer turbine outlet 4"

Trim 80mm magnum 1.15a/r 4" turbine outlet with 3.5 vband 77mm exducer

Last edited by SPOOLED UP; May 2, 2014 at 08:02 PM.

May 2, 2014 | 07:22 PM

Beanslsxnova

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From: waldorf,md

What are the turbo specs? It's hard to give an opinion with only 20% of the info. There's a lot more to a turbo than the inducer size.

May 2, 2014 | 08:02 PM

SPOOLED UP

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From: STL

hope that helps everyone.

May 2, 2014 | 11:35 PM

LS1NOVA

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The 69 will make approx 600whp on 15psi. At least those "GT45's" have good sized turbine wheels. Id go with the cheaper 69. Id guess it will make enough to push the limits of the shortblock.

May 3, 2014 | 05:49 AM

LCR Camaro

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Go with the 80mm otherwise youll run out of steam before 6000 rpm

May 3, 2014 | 07:57 AM

MonmouthCtyLS7

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I'd go with 80

May 3, 2014 | 08:27 AM

Boosted Firehawk

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80.....more rpms more power

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May 5, 2014 | 07:33 AM

Blackpanther99

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Might as well go with the 80mm no doubt.

May 5, 2014 | 08:47 AM

#10

a-low

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5.3 with 226/237 cam 80mm right here.

May 5, 2014 | 10:15 AM

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2muchboostNY

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^^^What kind of power and whats the powerband look like?

May 5, 2014 | 12:20 PM

#12

a-low

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Havent fired it up yet. the cam is a tick custom
The engine is stock with ls6 intake and tooley springs.
hopefully 700rwhp

May 5, 2014 | 12:25 PM

#13

boostedsl2

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From: St Petersburg, FL

80mm FTW

May 5, 2014 | 01:55 PM

#14

2muchboostNY

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@A-Low...thanks for the response. I would be interested in your results as well as I am currently in a long and slow drawn out 5.3 turbo build myself but have not chosen a cam or turbo. Have very similar specs as yours in front of a T56 and looking for a similar power goal. Have been eye balling the GT45 76mm and 80mm as well as the BW S472.