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Old 06-22-2010, 11:08 PM   #1
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Default 88mm to big???

goin on deployment soon and goin to build a turbo motor with the cash i save up while im gone..

forged 347 eagle H beams diamond pistons fully studded motor (heads and mains)

looking at the lunati 221 cam (221/221 .58x''/.58x'' 114* lsa

now i am doin this as my first turbo build with plans to slowly build a 408 or so in the future...

was thinking of doing a TC78 or T78 turbo with this

but was thinking that it would be a little small for the future build..

so i was thinkin of goin to a GT-88. from forced inductions.. would the 9.5:1 347 be able to spool this at a decent rate for a street car.. i know it would make a hell of a track car but i want to DD it also..

would the compression help on making it better on the street out of boost??


any info would be great

i know i will catch some flaming.. im ready for that.. i do need some good advice..

thanks
Travis
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Old 06-22-2010, 11:14 PM   #2
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on the street it may work great, lag out of the hole and once the car is moving old the **** on, that thing will be a rocket on the big end, if your car HOOKS GOOD out of the hole now it may not come in fast enough
thats my opinion good luck
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Old 06-22-2010, 11:22 PM   #3
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it hooked good with about 500 rwhp best 60' of 1.61 no to bad...

what kinda RPM would i be looking at the GT-88 making boost and be spooled up by...?
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Old 06-22-2010, 11:28 PM   #4
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i would say damn close to 4k if not with only 347, factory heads?
if a auto big stall
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Old 06-22-2010, 11:30 PM   #5
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ive seen on a few forged 370 seeing full boost at 34-3500rpms
not sure on a 347
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Old 06-22-2010, 11:35 PM   #6
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I plan to upgrade my 88 to a 91.5 Its never too big!

here ya go
http://www.ls1tech.com/forums/forced...ame-motor.html
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Old 06-22-2010, 11:38 PM   #7
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the heads are a TSP LS6 head said to flow 300 cfm... i have a 3600 stall... i am goin to get it restalled to 3000 though..
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Old 06-22-2010, 11:59 PM   #8
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it probably will be a little sleepy with the 3000 stall
good luck
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Old 06-23-2010, 12:06 AM   #9
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thanks guys from what i am getting is it wouldnt be the best BUT i would still work out with the smaller cubes...

more input please..
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Old 06-23-2010, 12:41 AM   #10
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anyone with real experince with a 88mm on a 347??

thanks all for your input.
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2004 YJ GTO forged 347 AFR 230 v2 heads VTC2 turbo cam 3200 stall 4L80e Gforce1320 3.5 alum drivershaft, bolt together stubs lvl 2 axles and trutrac Gforce1320 rearcoilovers lovells front struts
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Old 06-23-2010, 01:01 AM   #11
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We are currently putting a GT-88 from Jose on my car with some AFR 225 1630s on a 347 budget motor w/ a TH400. Let ya know in a month or so
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Old 06-23-2010, 01:05 AM   #12
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Quote:
Originally Posted by AutomagicLS1 View Post
We are currently putting a GT-88 from Jose on my car with some AFR 225 1630s on a 347 budget motor w/ a TH400. Let ya know in a month or so
do you plan on street driving alot? that is acually the turbo i was looking at!! look forward to the results!!
should be a BEAST!!
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oh yea and 78mm midframe turbo

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Old 06-23-2010, 01:06 AM   #13
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Quote:
Originally Posted by yelo04goat View Post
anyone with real experince with a 88mm on a 347??

thanks all for your input.
i posted that link son, it was a 355 engine, but same **** as a 347.
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Old 06-23-2010, 01:08 AM   #14
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Quote:
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i posted that link son, it was a 355 engine, but same **** as a 347.
i did see that and is was good reading.. just lookin for more input ya know..

thanks
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Old 06-23-2010, 01:55 AM   #15
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Quote:
Originally Posted by yelo04goat View Post
do you plan on street driving alot? that is acually the turbo i was looking at!! look forward to the results!!
should be a BEAST!!
Pretty much it will only be used on the street also going to run on E-85
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Old 06-23-2010, 02:00 AM   #16
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good ol KS find e85 everywhere... im from wichita...stationed in cali with the navy....

cant find e85 anywhere.

why did you choose to go with the gt-88?? seems good for the set up with out tooo much lag??
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Old 06-23-2010, 02:04 AM   #17
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I daily drive my LS2 88mm around rain or sun...not too big at all.
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Old 06-23-2010, 02:07 AM   #18
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you got a few more cubes tho.. dont think it would make to big of a difference?
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Old 06-23-2010, 02:24 AM   #19
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Quote:
Originally Posted by yelo04goat View Post
good ol KS find e85 everywhere... im from wichita...stationed in cali with the navy....

cant find e85 anywhere.

why did you choose to go with the gt-88?? seems good for the set up with out tooo much lag??
I went with the bigger turbo and bigger heads b/c next year i'm going big cubes. Just going to use this motor to learn on. I think there are plenty of 347's on here that trap 145+ with that setup
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Old 06-23-2010, 02:30 AM   #20
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cool deal man thanks.
should be killer
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Old 06-23-2010, 02:30 AM
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