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Old 08-31-2010, 12:38 AM
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DavidS DavidS is offline
Missing a 67
 
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Default 427 rebuild

A few months ago I bought a rebuilt gen IV 427 on EBay for my 69 Camaro and had nothing but problems with it. Low oil pressure (5-10 psi) and high temperatures (210-220 degrees F).

I brought it to Precision Automotive in Simsbury, CT to be checked and was told:

Bores
4.313 - 4.3135
Pistons
4.307 = 0.0065 CL
Ring Gap
0.027 to 0.028
Crank Mains
2.7385 0.10 under
Main Housing Bore
+0.005 0.006 CL Bearing
Rods
2.1895 0.010 0.0015 CL
Cam is Comp Cams 294S (# 11-219-4)
0.022 Lash
595 248 110 degrees
595 248 (not same as book)

Spring
1.88/1280
1.45/380


he also said:
- it was originally a 2 bolt converted to a 4 bolt
- the mains are way over (6 thou clearance)
- the rods are a little tight
- the bearings are history
- he will hone and ring it

so they rebuilt it and put it on the dyno today.

Dyno setup:


Running:


went to 505 hp
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68 Camaro (?350 SB)
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Old 08-31-2010, 01:16 AM
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ls6monte ls6monte is offline
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Nice!
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Old 08-31-2010, 07:43 PM
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ILuvPizzaTimes10 ILuvPizzaTimes10 is offline
YOUR ALL GUNNA DIE!!!
 
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Kick Ass!!!!! now what about the torque??? i dont care about HP!!!!
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Old 08-31-2010, 08:33 PM
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Quote:
Originally Posted by ILuvPizzaTimes10 View Post
Kick Ass!!!!! now what about the torque??? i dont care about HP!!!!
Pizza, The peak torque was 492 at 4100 RPM.

Dyno sheet:
Attached Images
File Type: jpg 69camaro 004.jpg (95.8 KB, 8 views)
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68 Camaro (?350 SB)
69 Camaro (L72 427 BB)
69 Camaro (DZ 302 SB - www.z28.net)
Camaro - A friendly flying car – from the French - the first half "camarade/friend" and the last half “aero/of the air".
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Old 08-31-2010, 08:42 PM
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nice!
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Old 08-31-2010, 09:57 PM
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repectable numbers.
more than ya need David.
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Old 10-28-2010, 02:54 AM
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KLAB KLAB is offline
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Quote:
Originally Posted by DavidS View Post
The peak torque was 492 at 4100 RPM.
DAM!!!!!
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