New heads Pics
Thread Starter
Racer
Joined: Feb 2012
Posts: 261
Likes: 3
From: Clawson Michigan
New heads Pics
These are the heads I bought from Straub tech.
185 with 65cc chambers.
I bought them bare since I was still undecided if I was going to use a flat tappet or hyd roller cam.
I will be sending them out to get the finish work done and some mild porting and post the before and after flow readings
Advertise flow readings
Lift Intake Exhaust
.300 202 145
.400 235 175
.500 241 185
.600 248 190
185 with 65cc chambers.
I bought them bare since I was still undecided if I was going to use a flat tappet or hyd roller cam.
I will be sending them out to get the finish work done and some mild porting and post the before and after flow readings
Advertise flow readings
Lift Intake Exhaust
.300 202 145
.400 235 175
.500 241 185
.600 248 190
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I would send the intake along and have it port matched. Save yourself some later grief and have them install "Time Serts"
http://www.timesert.com/
In the 4 head valve cover bolt holes.
Use the rubber/silicone cover gaskets with the metal inserts.
Manley race flow valves with tulip stem valves with radius heads.
If those came with 2.02 seat size have them open up the seats to 2.05 or 2.055 valves. The valve size is what determines the final flow for any given port.
http://www.timesert.com/
In the 4 head valve cover bolt holes.
Use the rubber/silicone cover gaskets with the metal inserts.
Manley race flow valves with tulip stem valves with radius heads.
If those came with 2.02 seat size have them open up the seats to 2.05 or 2.055 valves. The valve size is what determines the final flow for any given port.
Racer
Joined: Jun 2013
Posts: 484
Likes: 43
From: NJ
Repair the threads before they break? How about installing a set of studs into the valve cover holes instead. 
http://www.summitracing.com/parts/ar...7613/overview/
Studs with 12 point head nuts. They work great.
http://www.summitracing.com/parts/ar...7613/overview/
Studs with 12 point head nuts. They work great.
Last edited by 76Rat; Dec 11, 2013 at 07:22 AM. Reason: forgot to add link
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Looks like something from overseas.......where are they made? Combustion chamber doesn't follow current designs for 23 degree cylinder heads. I love it when a customer brings in a bunch of Internet purchases for our shop to build into a "Killer Motor". I just had a customer bring in a bunch of "Trick" LS engine parts...60% weren't useable! We built him a haul *** 408 using his LS2 block with LS3 heads and it passes state smog checks. Lucky for this guy a lot of parts were recent purchases and he could get them exchanged through "Dumbsh*t Racing" but with shipping charges he probably wasted $300 on the build.
Thread Starter
Racer
Joined: Feb 2012
Posts: 261
Likes: 3
From: Clawson Michigan
Head are cut for 2.02 valves. Are there any downfalls with a 2.05 valve? Engine is the gm Goodwrench 260hp with dished 4vr pistons, would the need the reliefs cut larger to accommodate the 2.05 valve?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
http://www.summitracing.com/nv/parts...make/chevrolet
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Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
I would send the intake along and have it port matched. Save yourself some later grief and have them install "Time Serts"
http://www.timesert.com/
In the 4 head valve cover bolt holes.
http://www.timesert.com/
In the 4 head valve cover bolt holes.
I installed heli-coils on my Brodix heads when I first got them just to avoid problems later, also installed them on my EFI intake on the thermostat housing holes and the distributor hold-down
Next time I buy a set of heads I'll have to remember those timeserts
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
These heads have centerbolt and perimeter valve cover patterns. Is there a preference to which is better to use?
Head are cut for 2.02 valves. Are there any downfalls with a 2.05 valve? Engine is the gm Goodwrench 260hp with dished 4vr pistons, would the need the reliefs cut larger to accommodate the 2.05 valve?
Head are cut for 2.02 valves. Are there any downfalls with a 2.05 valve? Engine is the gm Goodwrench 260hp with dished 4vr pistons, would the need the reliefs cut larger to accommodate the 2.05 valve?
I've never had center bolt valve covers
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Interesting....never heard of these before. Thanks for posting the link George
I installed heli-coils on my Brodix heads when I first got them just to avoid problems later, also installed them on my EFI intake on the thermostat housing holes and the distributor hold-down
Next time I buy a set of heads I'll have to remember those timeserts
I installed heli-coils on my Brodix heads when I first got them just to avoid problems later, also installed them on my EFI intake on the thermostat housing holes and the distributor hold-down
Next time I buy a set of heads I'll have to remember those timeserts
the distributor hold-down use a stud lock tighted in
Racer
Joined: Jun 2013
Posts: 484
Likes: 43
From: NJ
Well it is like this. If you have ever been around high end aluminum heads they are actually sold with steel thread inserts. cheap heads you have to add them. The second thing is high end tall valve covers made to clear roller rockers and tall studs use something like 4 inch long bolts. Not little short studs
http://www.summitracing.com/nv/parts...make/chevrolet
http://www.summitracing.com/nv/parts...make/chevrolet
http://www.jegs.com/i/Granatelli/467/GM-SBC102/10002/-1
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
I know they're not fool-proof, but when I installed them 6-7 years ago it was the only option I was aware of....now I have that Timesert page bookmarked
Thread Starter
Racer
Joined: Feb 2012
Posts: 261
Likes: 3
From: Clawson Michigan
What is different with the chambers compared to current 23 degree cylinder heads?
Application = mild 350 street
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
For a mild goodwrench motor upgrade those will be a nice wakeup for sure.
Dont know that putting race stuff in them is even worth it. The timeserts gotta agree with. Nothings worse than torquing down your intake or valve cover and having the threads fail when youre about to take off to cruise night an hour later.
Chamber may not be cutting edge but its not bad either. Almost looks like an older Dart/Edelbrock copy leave the chamber alone
Dont know that putting race stuff in them is even worth it. The timeserts gotta agree with. Nothings worse than torquing down your intake or valve cover and having the threads fail when youre about to take off to cruise night an hour later.
Chamber may not be cutting edge but its not bad either. Almost looks like an older Dart/Edelbrock copy leave the chamber alone
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Randy if you ever need some Timeserts any time day/night give me a call all the tooling down at the machine shop, run down here and we'll fix you right up.
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
Thread Starter
Racer
Joined: Feb 2012
Posts: 261
Likes: 3
From: Clawson Michigan
Update.
I dropped the heads off today
For steve Sanchez at total flow products to setup and machine.
Work being done is guides honed, valve job, bowls blended and cleaned up.
Clean up ports, mill deck to achieve 60-62cc chambers and bench flow.
I will post flow numbers and photos when they are complete.
I dropped the heads off today
For steve Sanchez at total flow products to setup and machine.
Work being done is guides honed, valve job, bowls blended and cleaned up.
Clean up ports, mill deck to achieve 60-62cc chambers and bench flow.
I will post flow numbers and photos when they are complete.