What happens if you put 305 heads on a 350?
What happens if you put 305 heads on a 350?
If you have flat top pistons in that ’70 350, the small chambers of the 305 heads may raise the compression ratio too high for 92 octane. Once you pull the heads off the ’70, you can determine if you have flat tops or dished pistons. If you have dished pistons, no problem.
Can you put Vortec 350 heads on a 305?
There’s both 350 and 305 vortecs. Heads from both these engines would physically bolt on to a 305, but bolting a set of 350 heads onto a 305 would hurt performance more than anything. The heads off a 305 vortec are actually pretty decent heads for a 305, and if you’re set on vortec heads, those are the ones you want.
Which valve in a cylinder head is typically bigger?
In an internal combustion engine, the inlet valve is almost always significantly larger than the exhaust value. That holds true for all cases where the number of inlet and exhaust valves is the same.
Are 305 heads any good?
Any head that’s considered a “performance” 305 head would work well. Even something like the 283 Power Pack heads would run pretty well (but lack accessory bolt holes on the ends). Don’t forget, there is a 305 Vortec version. Small chamber 327/350 heads with 1.94″ valves will suffer from shrouding issues.
Are 882 heads any good?
The 441 has a reputation as a good-flowing head among the production 76cc chamber heads. In this particular case, it lost out to the 882 head, but overall it’s a decent head that responds well to pocket port work and larger 2.02/1.94 valves….
| GM 882 IRON | |
|---|---|
| Port: | 151 cc |
| I Flow @ 0.400: | 203 cfm |
What’s the difference between a Chevy 305 and 350?
Registered. 305 and 350 are exactly the same except for piston size, what fits one fits the other (9 out of 10 times). Easiest way to differentiate is 305 is a 5 litre engine and the 350 is a 5.7 litre engine.
Which valves are normally bigger?
Therefore, the intake valve is generally designed to be larger than the exhaust valve to reduce the difficulty of intake and increase the amount of intake air.
Are bigger valves better?
Answer: It depends on the type of cylinder head. Generally, if the cylinder head was designed for street applications larger valves will not improve air flow. Often tines, large valves will actually decrease air flow. Thinking that “bigger is better” many people install 1.90″ or 1.94″ intake valves in 305 heads.
Are 350 heads better than 305?
305 heads on a 350 will raise your compression a good deal, maybe even too much for pump gas if you have flat tops or domed. I would go with 350 heads if I were you. If you have flat top pistons a set of 350 heads would be best.
What kind of intake valve does a 305 head use?
Funny thing is that the 1.84 intake valve 416, 601, and 801 castings flow as much as the 1.94 350 castings from the same era. Go to thirdgen.org and look up the porting articles on there. They are getting about 230-240cfm out of the above 305 heads from amateur porters.
What kind of cylinder head does a 305 Hi LG4 use?
Cylinder Heads. Lunati used “generic” 305 iron cylinder heads (casting number=14014416, used on LG4 and HO engines), replacing the 1.84-inch stock valves with larger 1.94-inch valves, but kept the stock 1.50-inch exhaust valve size, treating both to a “good’ standard valve job.
What’s the difference between 305 heads and 350 heads?
These heads will port out well, but be aware that 305 heads have smaller valves, so only look for 350 heads unless you’re specifically working on a 305. This will save you the expense of extra machining to put in larger valves.
What kind of motor does a 305 HO head have?
The motor’s been bored 40 over, and has a mild cam (204/214 at .050 dur.) with a dual plane intake. Get some 416’s or 601’s their 305 HO heads early to mid 80’s. I have a 283 with 416’s and they work well