Offshore inexpensive LS7 heads flow 388 cfm
#41
I figure with your cam size in duration and larger Engine, if lift stayed around the same you'd be in this neck of the woods with this intake or 4 holder...
https://www.yellowbullet.com/threads...sults.1204610/
https://www.yellowbullet.com/threads...sults.1204610/
#44
Thread Starter
TECH Fanatic
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From: Sonoma Co. Ca.
Oh they had work done alright. Valve seat to combustion chamber ridges were hideous and likely killed low lift numbers. Valve seat to bowl were almost as bad. They come out of the box looking really unfinished yet assembled for use. Never flowed them as cast but I’m sure it would have been a head scratching disappointment, scary looking machines ridges all over the place.
#45
I'm poking around on a set for a side project in my spare time. One of the downfalls of this head is you can't put big springs on them. There is more there, just haven't had time to get back on them.
2.20" valve
50* seat angle
.200 148
.300 233
.400 286
.500 353
.600 375
.700 390
.800 402
.900 409
2.20" valve
50* seat angle
.200 148
.300 233
.400 286
.500 353
.600 375
.700 390
.800 402
.900 409
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Corona (03-04-2021)
#46
Is this Cheap Speed Master castings? If so
🤣😂 Gone head on with your Bad ...
Edit... I see Valve size and kinda know bore size? Hopefully a smaller bore 🤗
Btw can you get the Actual valve angle (when u get time)? I've been told 1 thing 12degrees and Read something totally different 15° Was told by a rep yrs ago this was a Misprint.
🙃😁😲
🤣😂 Gone head on with your Bad ...
Edit... I see Valve size and kinda know bore size? Hopefully a smaller bore 🤗
Btw can you get the Actual valve angle (when u get time)? I've been told 1 thing 12degrees and Read something totally different 15° Was told by a rep yrs ago this was a Misprint.
🙃😁😲
Last edited by Corona; 03-04-2021 at 09:28 AM.
#48
I could kiss U.. it reads 15 degrees for the speed Masters🤫 New in my file Same Porter & flow bench used with listed heads above 😉
TFS Ls7 heads
.500 349
.600 382
.650 393
.700 402
.750 405
TFS Ls7 heads
.500 349
.600 382
.650 393
.700 402
.750 405
Last edited by Corona; 03-04-2021 at 09:44 AM.
#50
Thread Starter
TECH Fanatic
iTrader: (5)
Joined: Nov 2011
Posts: 1,694
Likes: 227
From: Sonoma Co. Ca.
I'm poking around on a set for a side project in my spare time. One of the downfalls of this head is you can't put big springs on them. There is more there, just haven't had time to get back on them.
2.20" valve
50* seat angle
.200 148
.300 233
.400 286
.500 353
.600 375
.700 390
.800 402
.900 409
2.20" valve
50* seat angle
.200 148
.300 233
.400 286
.500 353
.600 375
.700 390
.800 402
.900 409
#52
What gets me is yours was sold with 2.165 Valves
There sold with 2.20 valves and lists it as a 15° head. I called and asked yrs ago about it before my purchase and was told it was a Misprint.
Now I wonder Does a Factory LS7 rocker work with a 15 degree Speed Master castings?
https://speedmaster79.com/Chevy-LS7-...-Cylinder-Head
There sold with 2.20 valves and lists it as a 15° head. I called and asked yrs ago about it before my purchase and was told it was a Misprint.
Now I wonder Does a Factory LS7 rocker work with a 15 degree Speed Master castings?
https://speedmaster79.com/Chevy-LS7-...-Cylinder-Head
#53
What gets me is yours was sold with 2.165 Valves
There sold with 2.20 valves and lists it as a 15° head. I called and asked yrs ago about it before my purchase and was told it was a Misprint.
Now I wonder Does a Factory LS7 rocker work with a 15 degree Speed Master castings?
https://speedmaster79.com/Chevy-LS7-...-Cylinder-Head
There sold with 2.20 valves and lists it as a 15° head. I called and asked yrs ago about it before my purchase and was told it was a Misprint.
Now I wonder Does a Factory LS7 rocker work with a 15 degree Speed Master castings?
https://speedmaster79.com/Chevy-LS7-...-Cylinder-Head
The following users liked this post:
Corona (08-14-2021)
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G Atsma (03-07-2021)
#56
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G Atsma (03-07-2021), WE TODD DID (03-07-2021)
#57
Where It gets technical 🤣😂 they only Have 2 Rectangular Port Heads. No In-between 👍🤫 all models sold with CNC come from Either 1 or the other.
1)
https://speedmaster79.com/Chevy-LS3-...-Cylinder-Head
2)
https://speedmaster79.com/Chevy-LS7-...-Cylinder-Head
1)
https://speedmaster79.com/Chevy-LS3-...-Cylinder-Head
2)
https://speedmaster79.com/Chevy-LS7-...-Cylinder-Head
The following users liked this post:
G Atsma (03-07-2021)