A small carb is not "better" because it is small.My " nothing ' engine in my car got a 500CFM 4 barrel, Summit brand for those interested. Could I have gotten more HP from a 600CFM?? Not sure, maybe, but from what I have researched the smaller one will be a better carb for the street....
I am going to respectfully disagree with you... Yes you can jet them differently but the carb is still capable of MORE air and the engine will lose some low end torque because of that, which is what gets you from street light to street light...A small carb is not "better" because it is small.
A large carb can work as well as a small carb.
The engine can only use X amount of air based on the displacement/intake/cam/compression/heads/exhaust.
A 950 cfm carb can be jetted/tuned to work just as good as a 500 cfm carb.
Just because it has the capability to flow 950 cfm does not mean it will flow 950 cfm on an engine.
If the engine does not need it, the carb will not flow it. Jet the carb (adj air bleeds ect) for the air flow demand and it will work just fine with no bog or lean/rich concerns.
But one thing is certain, it the engine can use more air than the carb can provide that is on it, it will always make more power with a larger carb.
If the engine has more carb than it needs, if tuned right, it will not cost the engine in power/driveability/mileage at all.
Same with EFI.
Put a 90mm throttle body on a stock 5.0 and it will work just fine, even though it could flow over 1,350 cfm on the right engine.
Most modern EFI engines have throttle bodies that can flow a lot more air than the engine could possibly use. You can not go to large, but you can go to small.
The engine can not draw in more air just because the carb is bigger. It is impossible.I am going to respectfully disagree with you... Yes you can jet them differently but the carb is still capable of MORE air and the engine will lose some low end torque because of that, which is what gets you from street light to street light...
Not according to this article.. Again my concern is street driving characteristics mainly poor response and sluggishness.The engine can not draw in more air just because the carb is bigger. It is impossible.
If the engine can only use 600 cfm, it does not matter if the carb is 950 cfm.
It will only flow 600 cfm. Period.
You can not change physics.
Jet/tune the 950 cfm carb for 600 cfm of air flow and it will run perfectly.
The engine will never use the extra 350 cfm of capability.
A carb booster works based on the pressure drop of air flow across it.
If the boosters sees 600 cfm of air, it will only draw in enough fuel (if tuned properly) for 600 cfm, despite being capable of flowing more.
This is what is in my motorAlso, Morel make a high lift high rpm hydraulic lifter but those mofos are north of a grand.
Morel HI-RPM Hydraulic Roller Link Bar Lifters - SBF
Morel 5879 HI-RPM Hydraulic Roller Link Bar Lifters Small Block Fordflowtechinduction.com
This is what I was looking for yesterday and finally found it. Proof is in the dyno.
View: https://www.youtube.com/watch?v=GZTdo2-cGCM
Not a lot of power difference but when its usable power across the curve and kills valve float that is a win. I would say that if you already have a motor put together changing to solid roller lifters on a hydraulic roller cam is probably not worth it unless you are reving it past 6500 rpm.
I was looking at the video a couple of times trying to figure out what the difference in specs was between the solid cam and the hydralic before realizing that they literally just dropped in new solid lifters on the same cam. The fact they picked up 9hp up top is awesome, and IMO doesn't begin to address what's most valuable. With solid, I presume a cam can get a lot more aggressive with ramp rates and lift. So, would be cool to see an expert select cams with similar manners for a given combo and see what they get out of it.
Yep, that would be about my limit for comfort.The 331 in my Coupe is 11:1 and zero issues on 91 octane (Oklahoma’s super unleaded). Aluminum heads really help with the higher compression ratios.