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Topic: 58cc Heads

in Forum: C3 Engines


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58cc Heads

Posted: 11/22/03 7:21pm Message 1 of 3
privategod
Former Member
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Toledo, OH - USA
Joined: 9/4/2002
Posts: 147
Vette(s): 1976 Stingray, L48 auto Buckskin/Buckskin Leather originally. Numbers matching.
Just curious if anyone has used the 58cc 305 heads on their Vette, I have seen some that have been "re-worked" for 350 performance for under $400. Supposed to raise 8.5:1 w/76cc heads to 10.25:1 .


'76 L48 Auto Project |IMG|http://www.freewebs.com/privategod/Mine2a.JPG |/IMG|
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58cc Heads

Posted: 11/23/03 6:14am Message 2 of 3
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Redwingvette
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Waterford, MI - USA
Joined: 9/13/2002
Posts: 1750
Vette(s): 1973 Red coupe
A friend of mine did once. He said it really had strong low end torque. The size valves and ports are small. That will make a difference for top end performance.

|UPDATED|11/23/2003 6:14:35 AM (AZT)|/UPDATED|



Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Dewitt radiator and dual electric fans
Borgeson Steering box
 


58cc Heads

Posted: 11/23/03 2:00pm Message 3 of 3
privategod
Former Member
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Toledo, OH - USA
Joined: 9/4/2002
Posts: 147
Vette(s): 1976 Stingray, L48 auto Buckskin/Buckskin Leather originally. Numbers matching.
These heads have 1.94/1.5 valves installed, which is about all that will fit inside those chambers.
Casting # 416
High velocity design
58cc chambers
New Guides
New 1.94 / 1.5 valves
New high lift valve springs (good for up to .510 lift)
New valve locks
New valve guide seals
3 angle performance valve job
resurfaced
pressure tested
These heads are completely rebuilt with all new parts. Chambers are machined in the intake valve area for improved flow with the oversize 1.94 intake valves.

Sample compression ratio's Engine Size Original
Compression
76cc head = New Ratio
327 9:1 = 10:1
350 8.5:1 = 10.25:1
400 8:1 = 10:1


http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33617&item=2443942097

|UPDATED|11/23/2003 2:00:07 PM (AZT)|/UPDATED|



'76 L48 Auto Project |IMG|http://www.freewebs.com/privategod/Mine2a.JPG |/IMG|

in Forum: C3 Engines


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