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  #1 (permalink)  
Old July 9th, 2008, 01:52 AM
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N/A vs turbo
what the differents in a 3.8 short block n/a and 3.8 turbo (87)

and the different in the heads on a n/a and the difference in 3.8 turbo.

thanks
cris
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  #2 (permalink)  
Old July 9th, 2008, 08:20 AM
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Read this thread right below yours

Whats the difference in these blocks?
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  #3 (permalink)  
Old July 9th, 2008, 08:38 AM
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Quote:
Originally Posted by Cris View Post
what the differents in a 3.8 short block n/a and 3.8 turbo (87)

and the different in the heads on a n/a and the difference in 3.8 turbo.

thanks
cris
In 86'-87' the blocks and the heads are the same. The difference is in the rotating assembly. The cranks and the pistons are different. The cranks in the turbo motors have rolled fillets on both the mains and rods the N/A has rolled fillets only on the mains. Some factory replacement N/A motors came with turbo cranks.
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Old July 9th, 2008, 11:06 AM
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The crank, pistons, and some of the rings are different. Im pretty sure the compression ring is a different alloy. The block is the same. The heads are the same. The pistons are the most critical difference.
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Old July 9th, 2008, 11:08 AM
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Quote:
Originally Posted by mikestertwo View Post
In 86'-87' the blocks and the heads are the same. The difference is in the rotating assembly. The cranks and the pistons are different. The cranks in the turbo motors have rolled fillets on both the mains and rods the N/A has rolled fillets only on the mains. Some factory replacement N/A motors came with turbo cranks.
They had the rolled radius but still have the weak lighter NA pistons.
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Blue GN: Old combo 559whp/706wtq. New buildup to come with race ported GN 1 heads and intake .
Black GN:Stock 134k shortblock except cam ,KB 70 mm TB and plenum, ported irons 1.77in 1.5ex, RJC head gaskets, ported stock intake, 212-212 comp roller, 1.65 T&D's, RJC powerplate, 1" plenum spacer, 83 lb/hr injectors, double pumper, FAST XFI, G-Body FMIC, welded ported stock manifolds, 3.5 dp, T66BB GTQ, Dusty PTC 9.5", 200 4-R by me with billet shafted forward drum, input, and planet. 8.5 rear with Auburn and 28 spline Moser axles. Time with old combo 10.88@126mph. Stage II coming soon .WORK HARDER! THOSE ON WELFARE DEPEND ON YOU!
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Old July 11th, 2008, 09:20 PM
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Quote:
Originally Posted by bison View Post
They had the rolled radius but still have the weak lighter NA pistons.
Yep, I took apart an NA engine that had a turbo crank....the pistons were still NA.
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Old July 17th, 2008, 09:18 PM
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re
thanks for the information guys.


cris
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