CK5
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Vortec Heads on a sb400
- Thread starter patnick
- Start date
T
tenderfoot
Guest
Nice:
https://sdparts.com/i-19958198-chev...2-large-port-vortec-bowtie-head-assembly.html
Maybe ideal with a roller cam
https://sdparts.com/i-19958198-chev...2-large-port-vortec-bowtie-head-assembly.html
Maybe ideal with a roller cam
beags86
Eastbound and Down
Lots of money for an iron head.
You can buy some budget aluminum heads for 1500 bucks and run more compression.
Otherwise the specs of those heads are decent. You could build some power with those.
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tenderfoot
Guest
Aluminum ones sure would be easier to drill
bassackwards
1/2 ton status
Way too big for a truck
bassackwards
1/2 ton status
I just snagged a barely run 383 Vortec last night. Drove 10 hours in the snowstorm to pay $800 for the whole engine.
It is a 5.7 Vortec roller cam engine with a new Scat 400 crank in it. Should be strong.
A 383 is a 350 w/ a 400 crank so it is almost the same as a 400 performance wise
It is a 5.7 Vortec roller cam engine with a new Scat 400 crank in it. Should be strong.
A 383 is a 350 w/ a 400 crank so it is almost the same as a 400 performance wise
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tenderfoot
Guest
Yeah I was thinking about that 400 crank in the 400 I have. But what is the benefits of a stroker? What about longevity? I've always had the thought with engines that a flame that burns so brightly can only burn for so long.
bassackwards
1/2 ton status
The biggest benefits are that it is easier to get a roller cam installed and they aren't as prone to cracking. I don't think I'd intentionally mangle a 400 to build a 383, just keep the 400 since you already have it.
The worst part of a 400 block is the bore size absolutely maxxed out the design and the Siamesed bores are weaker than in a 350 block
depends on the valve size...
Considering a 400, with 2.02 valves it would be fine
biggest concern on a 3.75" stroke is the rod angle. This is why I did go with a 383. None of the crate engines have a 6" rod
bassackwards
1/2 ton status
I have 210s on a 350. Runs pretty good in a 6000 pound truck
Don’t get upset just cuz someone doesn’t agree with you. Participate in the conversation and we can all learn something
beags86
Eastbound and Down
If you already got the 400, run the 400. Don't be swayed by the 383 non-sense
beags86
Eastbound and Down
That all depends on what your doing with the truck.
I have a set of heads that are flowing 335 on a 400 going in my truck.
Here's the dyno sheet
she's making 486 ft lbs at 3600.Should be fine in a truck
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I was going to ask you about the rod length on that one
Since were at it, What did those cc?
beags86
Eastbound and Down
Got yo use a 5.7 rod on a 400 if you want to do it right.
In my opinion. Also ditch the externally balanced crank.
64cc head
How is a rod angle different in a 383 over a 400?? They have the same stroke, only thing is different is bore size, which means squat for stroke. I'd rather build the 400 than a 383. More torque, more power. I had many 400s, and never had any issues with them. Put 350 or the longer 6" and run it. If I had the money I'd build a 406 for my Yukon, should work good with the whipple….
Whats the difference if internal or external balance? Long as it's balanced. Costs more money to make a 400 crank internal or even to buy one over new flexplate and balancer.
