So, removing my spare tire made me gain 10HP and my wife made me lose 15? She's not riding in my Jeep anymore.
Does a cold air intake add power on a 4.0?
- Thread starter Jezza
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Head Lice
TJ Addict
Possible answer to every tech question . . . . . "because Jerry says so!"
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Winks42
TJ Enthusiast
OP
Already did that on a Neon about 15 years ago. Ran that car in a bracket class. ITBs, cam and a Megasquirt. 9500 rpms all the way down the track. Best ET 13.4 on a stock Neon bottom end. That made my butt tingle or whatever.
OP
A couple other tidbits. The stock box inlet horn is right at 42mm. Compare that to the 55mm throttle body opening. It's not surprising that removing just the horned inlet made power as well.
There you go again with rational facts, I thought we went over this the other day !
Thanks Man !!!!!
Isn’t there a Venturi effect which offsets the tube diameter?
I bet there is an equation that will calculate that, but a 55mm velocity stack/bellmouth sure would flow more than a 47mm.
I believe the OP got a 10 HP gain. 10 HP is about as useful on a 4.0 as an angry grill. I know a redneck that says his Jeep is more aerodynamic with his up front.
I believe the OP got a 10 HP gain. 10 HP is about as useful on a 4.0 as an angry grill. I know a redneck that says his Jeep is more aerodynamic with his up front.
OP
This TJ actually had an angry grill installed when I bought it. So now that's 20HP...I believe the OP got a 10 HP gain. 10 HP is about as useful on a 4.0 as an angry grill. I know a redneck that says his Jeep is more aerodynamic with his up front.
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Head Lice
TJ Addict
Wondering why the dyno results were dismissed out of hand with a 'No' and no explanation.
Did the OP tweak the dyno results? Guessing his dyno pulls were as reported.
Did the dyno fail to give accurate results? Also guessing they were accurate as posted looking at the tq-hp curves in relation to each other.
Is the tq-hp gain in a useable rpm range? Maybe not for most folks.
But to just dismiss the OP's results as not genuine "just because Jerry says so" . . . . . pfffffftt
Did the OP tweak the dyno results? Guessing his dyno pulls were as reported.
Did the dyno fail to give accurate results? Also guessing they were accurate as posted looking at the tq-hp curves in relation to each other.
Is the tq-hp gain in a useable rpm range? Maybe not for most folks.
But to just dismiss the OP's results as not genuine "just because Jerry says so" . . . . . pfffffftt
What if you have someone else's wife in your Jeep? I'm guessing you really lose.So, removing my spare tire made me gain 10HP and my wife made me lose 15? She's not riding in my Jeep anymore.
At least you didn't say you lost 20+... LOLSo, removing my spare tire made me gain 10HP and my wife made me lose 15? She's not riding in my Jeep anymore.
I enjoy when people test things, that's how you learn what works. This was fun to put some numbers into. I know there are probably several variations but in general the intake size is somehow correlated to RPM and displacement. You do make power tuning the intake regardless of the maximum flow, that's maybe the point of variable geometry intakes on newer engines so it might not entirely be about, "it flows enough so it's fine." The same thing goes for exhaust, scavenging and resonance can be important.