What mods do you think are HP gaining myths? (Research for Testing)

[lew52]

You got it, before TDC is advanced timing...Lew

[Diesel_Brad]

Originally Posted by DasCheckers
Ok, so as a dude with tons of mechanical knowledge and unlimited access to a 4- wheel dyno, I'd like to compile a list of theories, parts, and mods that you personally think will increase horsepower and torque.
They will all be tested througholy, and results will be posted.

For example,
Throttle Body Spacers / been tested/ dont waste your time
The Infamous Smog Pump Super-Charger /been tested/ Waste of time
Cold Air Intake /been tested/ 5-10 hp
Different Stock Snorkels from different motors
Custom, ARB type snorkel /been tested/no hp increase
EGR Delete //waste of time
Smog Pump Delete /been tested/ less drag
A/C Delete /been tested/ only when it is on is it robbing power
Electric fan conversion /been tested/ less drag
Headers /been tested/ more torque
Straight pipe /been tested/ Only on high rpm race engines
Gutted cat /been tested/ reduced power
Higher Octane Gas /been tested/ depends on the app
Advanced timing /been tested/ yes

LIKE I SAID THESE HAVE BEEN GONE OVER!!!!!!!

[Old93junk]

Do research the CAI......Its got to be BS, pulling hot underhood air is NOT going to gain HP over pulling cool outside air from the grill area with a stock air intake......Most likely it LOSES hp......But, man it looks cool!

[Diesel_Brad]

depends on whos CAI. The higher end brands have a box to section off the heat, hence the name. COLD AIR INTAKE, not filter stuck on the end intake

[DasCheckers]

Originally Posted by Old93junk

Do research the CAI......Its got to be BS, pulling hot underhood air is NOT going to gain HP over pulling cool outside air from the grill area with a stock air intake......Most likely it LOSES hp......But, man it looks cool!

I think any air increase is good, but cold air is better then warm in theory. Even though a CAI will barely make a difference in a stock motor.

[Conanski]

Yes some of the CAI kits are completely mislabeled.. K&N especially. And the results you see from any of these mods will depend directly on what engine you're putting them on, the bigger motors move more air so something that is hardly noticable on the I6 may produce pretty substantial gains on a 460.

[393STROKER]

Higher octane gas burns slower than lower octane gas.

[red58]

water injection,couple of ways of doing it,with a proper injection kit controlled with a basic ecu or they can be vacuum controlled.

[Dirt racer]

How about how much horse power we will lose along with fuel milage if they increase the alcohol from 10 percent to 20. I already know from the alcohol guys at the race track that whatever you were running for jets on gas to double the size for alcohol. Also everytime I go to Iowa I get a huge boost in fuel milage when I run the gas without alcohol compared to the 10 percent stuff in mn.

[Eddiec1564]

How about simple water injection(not that water cracking HOO joke) with advance timing on bone stock setup? This was done back in WW2 with airplane engines to increase power with out pinging.

[TexasGuy001]

This is an interesting thread. Thats a great idea. Will each supposed preformance part be tested individually on a stock motor that doesn't have any other mods to speak of? Just curious.

[TexasGuy001]

Originally Posted by Dirt racer

How about how much horse power we will lose along with fuel milage if they increase the alcohol from 10 percent to 20. I already know from the alcohol guys at the race track that whatever you were running for jets on gas to double the size for alcohol. Also everytime I go to Iowa I get a huge boost in fuel milage when I run the gas without alcohol compared to the 10 percent stuff in mn.

Why does Iowa have different fuel than MN?

[Dirt racer]

You can still buy 87 octane gas in Iowa with no ethanol at most gas stations. I definetely notice the better gas milage everytime I use it. All the gas in MN has ethanol in it except the few off roads pumps with the higher octane.

[*2fords*]

I'd like to see if those excessivly high priced spark plugs (E3s for one example) are worth all the extra money compared to stock plugs.

[jroehl]

Originally Posted by 393STROKER

Higher octane gas burns slower than lower octane gas.

This is wrong. Octane rating has only to do with susceptibility to pre-ignition, that is, compression ignition or detonation. A gallon of gasoline has the same amount of energy and the same burn rate no matter the octane rating, UNLESS something like ethanol is used to modify the octane rating, since ethanol has significantly less energy per unit volume than gasoline.

Jason