Another intake thread

[OKDart]

You might be interested in this Engine masters episode. They dyno air filters on a 760 hp Chevy engine. The dual snorkel kills 53 hp at that level. Minute mark 9:05, they say it can probably support about 390 hp. But flip the lid and the numbers are: kills 12 hp and supports 640 hp.

 

[gtxrt]

won't lose that much doing what i posted. K&N filter open base and some air coming in the back. you lose the HP at the upper rpms not across the board right ?

 

[WileE]

Please elaborate. Never heard of them.

It's actually F.A.S.T. = Factory Appearance Stock Tire... it's a racing segment aimed at just that. For stock-configured cars that have been modified but limited to stock parts.

 

[1968rt]

CH4B take a look Intake Manifold Engine & RPM Range Test - Induction Extravaganza

 

[WileE]

CH4B take a look Intake Manifold Engine & RPM Range Test - Induction Extravaganza

I recall that article. Interesting because I'd had/used all those manifolds except the Weiand. Which perhaps may suit the OP's premise. I did have a SD with TQ under a stock hood, but not a 73-74, and not with a snorkel air cleaner.

 

[gtxrt]

that article has been out for years. I used the weiand not much higher than stock and no bigger runners and not any better on my gtx years ago and also a performer intake with Hughes ported heads. talked with Dave at Hughes engines he said put a rpm performer on and pick up 30 HP and I did it picked up 3 tenths.the ch4b has a bigger plenum and a little bigger runners on my Newport it loss a little bottom end and picked up a little power over 4500 rpms but the car never went faster. I shifted at 5200-5300 rpms. I asked Dave what was going on with the rpm performer he said one thing it was taller which helped a lot to make power. the Holley SD would be alright on a race car with gears and a converter to get to 3500 rpms to start making power.

 

[gtxrt]

talking less than 1 mph. same as I feel about the 440 intakes

 

[BSB67]

The problem with that 383 testing is that the intake was not the limiting factor. You’re not going to learn much from testing intakes on a 300 hp motor. Put those intakes on a 450 hp engine with a big enough carb and you’ll see considerable separation.

Without controlling a pile of track variables and correcting to standard conditions, you cannot conclude much from that testing, other than at that power level, the intake doesn’t matter much.

 

[gtxrt]

my testing on my Newport high 13's was about 400HP and 500TQ no port work with 1.6 exhaust valve, no headers and 2.94 gears with 5 different intakes, stock, ported stock, the performer, the ch4b and the winner the performer rpm. my gtx was low 12's not sure on HP but with ported Hughes heads, 800 cfm carb, 3.23 gears and headers the performer rpm picked up 3 tenths and 3 mph over the performer and the weiand intakes. that is all I need to know. case closed with me. knock yourself out buying and taking intakes on and off.

 

[gtxrt]

testing intakes on a 300 hp motor.

must be more than 300 HP to go 14 seconds and 100 mph with a roadrunner. stock roadrunners were around 15.5 seconds 1/4 mile times.

 

[RR Fan Dan]

CH4B take a look Intake Manifold Engine & RPM Range Test - Induction Extravaganza

That’s the article but it used to have a chart at the end comparing them all. It doesn’t say what the gains were from each one. And the iron intake they used is not the premium one I have.

 

[WileE]

That’s the article but it used to have a chart at the end comparing them all. It doesn’t say what the gains were from each one. And the iron intake they used is not the premium one I have.

What is "the premium one" ?

 

[RR Fan Dan]

What is "the premium one" ?

Post #1.