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I'm finishing up my offroad buggy build. The motor is a 411 Lq4 stroker 14:2:1 Frankenstein M311 heads, currently I have a cheap sheet metal intake on it for mockup. When I had the cam spec'ed they spec'ed it at Cam motions for a single plane intake. I am back and forth on which intake I should use along with will a 4150 be fine or should I jump up to a 4500. I would like to keep the air cleaner on the top of the motor compared to out front where more mud dirt etc will get to it.
The 4500 tb is going to be more of an on/off switch where the 4150 will have tons of part throttle response and the throttle will do a lot more. A 4500 throttle body 60% TPS might be nearly WOT as far as airflow demand of the engine goes so it will be harder to drive. The 4500 will make more power, 10-20 hp likely and probably only up top. The gain is from the bigger intake and bigger TB together.
The 4500 tb is going to be more of an on/off switch where the 4150 will have tons of part throttle response and the throttle will do a lot more. A 4500 throttle body 60% TPS might be nearly WOT as far as airflow demand of the engine goes so it will be harder to drive. The 4500 will make more power, 10-20 hp likely and probably only up top. The gain is from the bigger intake and bigger TB together.
Thanks for the response. I am not worried about 10-20 hp on the top end as it won't matter to much for what the buggy is used for.
The 4500 tb is going to be more of an on/off switch where the 4150 will have tons of part throttle response and the throttle will do a lot more. A 4500 throttle body 60% TPS might be nearly WOT as far as airflow demand of the engine goes so it will be harder to drive. The 4500 will make more power, 10-20 hp likely and probably only up top. The gain is from the bigger intake and bigger TB together.
The 4500 tb is going to be more of an on/off switch where the 4150 will have tons of part throttle response and the throttle will do a lot more. A 4500 throttle body 60% TPS might be nearly WOT as far as airflow demand of the engine goes so it will be harder to drive. The 4500 will make more power, 10-20 hp likely and probably only up top. The gain is from the bigger intake and bigger TB together.
This! I run a Holley 4150 throttle body on a super vic (holley split intake would be my choice if buying today) and the throttle is CRISP. That's the way I would go if you aren't concerned about a handful of extra hp at the peak.
This! I run a Holley 4150 throttle body on a super vic (holley split intake would be my choice if buying today) and the throttle is CRISP. That's the way I would go if you aren't concerned about a handful of extra hp at the peak.
Thanks captain obvious for proving our point, the 4500 gained 12 hp and 4tq at the flywheel over 6000 RPM on 427ci. That's not exactly stunning!
your looking for some magic Forced induction improvement...GTFOH. improvement was seen and if the Hp requirements go up the gap gets larger. Na Common sense...
your looking for some magic Forced induction improvement...GTFOH. improvement was seen and if the Hp requirements go up the gap gets larger. Na Common sense...
No, I'm looking at the overall picture that you are clearly missing. You can post all the magazine articles you want while on the *******, some of us have already done it in real life. The fact you don't have a running vehicle to back up all your "common sense" speaks volumes.
No, I'm looking at the overall picture that you are clearly missing. You can post all the magazine articles you want while on the *******, some of us have already done it in real life. The fact you don't have a running vehicle to back up all your "common sense" speaks volumes.
your finished and still Dumb your point is... Facts ask any Professional Engine builder or Cylinder head porter...there choice. Lmao the magazine article just backs up Basic Professional builder Knowledge idiot. Besides that if and when upgrades maybe done now you've got a 500 dollar intake with 1000 bucks Worth of work and still unable to out perform the as Cast version of...Hmmmmn sounds like the Mamo head build with the Mamo ported Super Vic that had just as much money invested and still Loss across the board.
You sound like a Ls1tech and sales chump. Corn Ball.
my left nut has more intelligence on Na without having my Longblock done.
your finished and still Dumb your point is... Facts ask any Professional Engine builder or Cylinder head porter...there choice. Lmao the magazine article just backs up Basic Professional builder Knowledge idiot. Besides that if and when upgrades maybe done now you've got a 500 dollar intake with 1000 bucks Worth of work and still unable to out perform the as Cast version of...Hmmmmn sounds like the Mamo head build with the Mano ported Super Vic that had just as much money invested and still Loss across the board.
You sound like a Ls1tech and sales chump. Corn Ball.
my left nut has more intelligence on Na without having my shortblock done.
No car is never finished, but they are a hell of a lot more fun when they run! You are missing the point, we said to buy the 4500 if the only goal is max performance (it's obvious that's all you care about). The OP said he felt midrange and part throttle response was higher on his priorities and that he isn't worried about 10-20hp on the top end so you would make a terrible sales chump because you didn't factor in what the end user actually wants.
It's Ls1tech 😫 and this Forum on Hp. I get it. Go to any other Forum post the Same question and 99% of the Builders will go with the CID and a 4500 on a Off Road Rock crawler. I also understand that every build doesn't need a 4500 or Carb intake as Much as it Kills me to say it.
Rules of Fill the Cylinder aren't Dependant on Rpm or peak or what ever your selling... Getting more air in is Hp and a 4500 is better...Not dependent on rpm and we would redo the camming and you'll still see a gain of.
I think the correct answer is an intake that fits your ports best, but if that's not a concern I would give up the 5hp at the very top of the RPM range for much better driveability.
01-10-2022, 08:26 PM
4150 or 4500 on 411 14.2:1 stroker 
