HEADS: I have the cast numbers, what are they?
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Member
Joined: Sep 2001
Posts: 456
Likes: 1
From: South Texas
Car: 97 200sx se-r, 82 Trans/Am
Engine: 350 bored to 355
Transmission: 700r4
Axle/Gears: 9 bolt 3.45
HEADS: I have the cast numbers, what are they?
I just adjusted my valves today. (I enjoy being able to step on it with out hearing the clatter now.) Anyway, I wrote the cast numbers down from my heads.
Can someone run the numbers and tell me what kind of heads I have?
The passenger's side reads :
3927188
E2201 GM 53
The driver's side reads:
3947041
ka s GM 8
Oh yeah, when I was doing the valves, why doesn't oil spit out at me? It only seemed to spit at different tightnesses of the rockers. If I loosened it, oil would spit. If I tightened it, the oil would seep. Should I change my oil a few times to clean out the engine?
Can someone run the numbers and tell me what kind of heads I have?
The passenger's side reads :
3927188
E2201 GM 53
The driver's side reads:
3947041
ka s GM 8
Oh yeah, when I was doing the valves, why doesn't oil spit out at me? It only seemed to spit at different tightnesses of the rockers. If I loosened it, oil would spit. If I tightened it, the oil would seep. Should I change my oil a few times to clean out the engine?
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
You have one 327 2-barrel 74cc head (188) and one double-hump 64cc hot-rod head (041) from a 302 or LT-1 type of motor. So half your cyls are at one CR with great flow, and the other half at a much lower CR with much poorer flow.
Yuck.
Yuck.
Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Well if infact these are the casting numbers on your heads.
One side is a 69/70 307/327 low perf 74cc head
while the other side has a (041) 69/70 302/350 hi perf head
64cc
Must run real good. Best look into that one.
www.mortec.com
One side is a 69/70 307/327 low perf 74cc head
while the other side has a (041) 69/70 302/350 hi perf head
64cc
Must run real good. Best look into that one.
www.mortec.com
Supreme Member
iTrader: (2)
Joined: Jan 2002
Posts: 9,962
Likes: 5
From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
lol... like trying to run a marathon with a work boot on one foot, and a nike running shoe on the other.
Supreme Member
Joined: Jan 2002
Posts: 3,852
Likes: 1
From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
lol... like trying to run a marathon with a work boot on one foot, and a nike running shoe on the other.
Thread Starter
Member
Joined: Sep 2001
Posts: 456
Likes: 1
From: South Texas
Car: 97 200sx se-r, 82 Trans/Am
Engine: 350 bored to 355
Transmission: 700r4
Axle/Gears: 9 bolt 3.45
I am not mistaken. I just looked again. It seems to run fine acctually. what should I do??? Also, since I am going to have to look into some other heads, how do I tell what are the hi-po heads and which are the crap heads?
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Thread Starter
Member
Joined: Sep 2001
Posts: 456
Likes: 1
From: South Texas
Car: 97 200sx se-r, 82 Trans/Am
Engine: 350 bored to 355
Transmission: 700r4
Axle/Gears: 9 bolt 3.45
also, would this cause any damage?
yeah, they look exactly the same too...
yeah, they look exactly the same too...
Last edited by foney_email; Jan 19, 2003 at 05:08 PM.
Supreme Member
Joined: Jan 2002
Posts: 3,852
Likes: 1
From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Go to www.mortec.com and print out the sbc heads list, then when you look at heads to the numbers up on the sheet and find out what they are!!
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