S/R heads
Thread Starter
Pro
Joined: Jun 2007
Posts: 634
Likes: 0
From: Hastings MN
S/R heads
http://www.worldcastings.com/prods_p...ds/srchevy.htm
Just wondering what people think of these heads. Does anyone have flow numbers on them? There's a guy local to me who is trying to sell a pair for $325... and it seems like they might be better than vortecs being as they can handle more lift.
Just wondering what people think of these heads. Does anyone have flow numbers on them? There's a guy local to me who is trying to sell a pair for $325... and it seems like they might be better than vortecs being as they can handle more lift.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Chevy casting # 186, 202/160 valves, fulie head.
runner size = 161/65
.300 = 177/119
.400 = 182/125
.500 = 187/135
.600 = 188/140
World Products SR torq. 202/160 valves
runner size = 171/82
.300 = 179/133
.400 = 205/145
.500 = 221/153
.600 = 225/155
GM vortec L31 casting #885
runner size = 170/61
.300 = 190/137
.400 = 227/151
.500 = 239/160
.600 = 229/162
runner size = 161/65
.300 = 177/119
.400 = 182/125
.500 = 187/135
.600 = 188/140
World Products SR torq. 202/160 valves
runner size = 171/82
.300 = 179/133
.400 = 205/145
.500 = 221/153
.600 = 225/155
GM vortec L31 casting #885
runner size = 170/61
.300 = 190/137
.400 = 227/151
.500 = 239/160
.600 = 229/162
Race Director
Joined: Jan 2000
Posts: 13,014
Likes: 2,257
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
They are a little rough out of the box, but we used a set of the 170's with larger valves installed and some pocket porting on a 327 and they ran great. Good basis to work from.
JIM
JIM
