C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Nov 10, 2012 | 04:58 PM
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Hi Guys, i have a 1975 L82 4 speed coupe.
Original 4 bolt block bored 030 & decked.
Speed Pro forged flat top pistons
AFR 190 heads
Lunati Voodoo 60103 cam.
Any desktop dynos that can tell

me what Hp i might have
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Old Nov 10, 2012 | 05:57 PM
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what compression?
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Old Nov 10, 2012 | 07:03 PM
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Originally Posted by 7t9l82
what compression?
The heads are 68cc
Flat tops pistons with 2 reliefs
I think about 9.8 cr
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Old Nov 10, 2012 | 07:14 PM
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just a guess probably about 420 depending on other things.
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Old Nov 10, 2012 | 07:22 PM
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what intake and carb?what distributor and headers ?
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Old Nov 10, 2012 | 08:41 PM
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Originally Posted by garygnu
what intake and carb?what distributor and headers ?
edelbrock performer 2101 quadrajet carby
flowtech headers
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Old Nov 11, 2012 | 08:59 AM
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i'd say 400 is good with the 2101. 10 higher with the 60102.
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Old Nov 11, 2012 | 10:00 AM
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yes bad intake for such good heads. with better intake still say 420 is possible
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Old Nov 12, 2012 | 06:23 AM
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Originally Posted by 7t9l82
yes bad intake for such good heads. with better intake still say 420 is possible
I want to keep original air cleaner & hood
what intake do you reccommend
I have stock HEI dist with upgraded module
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Old Nov 12, 2012 | 07:17 AM
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used weiand 8004
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Old Nov 12, 2012 | 07:28 AM
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i will never understand why people want a 400 h.p motor but are stuck with the stock air cleaner. with that said a performer is what you are stuck with . in which case i wouldn't waste my time and money on a.f.r 190 heads or the cam. put a set of headers on it , tune it and call it good. if you want it to run your going to have to get away from that stock air cleaner cars of that era aren't extremely valuable so have at it your talking about aluminum heads, are you going to paint them ? they won't look stock, how about the headers they don't look stock . you build it to please yourself but id get over this stock air cleaner fast. good luck with your project and enjoy
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Old Nov 12, 2012 | 10:03 AM
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don't underestimate AFR heads when paired with a 2101 or better yet the 8004.
190 AFR's w/2101 pulls right thru 7000 rpm on my 61.
Years ago a C4 guy put AFR's w/tuned port and stunned everybody that thought the runners were too small to make more power.
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