chrs1313

iTrader: (24)

I got tired of everyone doubting that ram air actually works at the speeds we see...yeah it might not be alot but it is something...more than i thought actually...

I did two test one with the car in stock form (breathing from the 1inch slit infront lid) and one with the ram air...The pressure was read using a monometer i jacked from work for the weekend...the tube was placed inside of the lid after the filter...see pics

The test consisted of setting the cruise control and waiting for the monometer to balance out around a given pressure in inches of H20...

There is an excel sheet for the ram air, but the stock form which is kind of obvious showed no increase in pressure inside of the air box when it balanced out at a given speed...But what about WOT???

This was the interesting part i did three runs for both tests and saw that the ram air had the same basic increases in pressure as the speed increased...But for the stock form under WOT it had a constant VACUUM of 5 inches of H20 throughout all three runs...So on the top end of the track 1/8-1/4 my car car traps 97-123 so we can use an average of 110mph which would be about 6 inches of H20 from the graph...So my car is gaining 11inches of h20 over a stock car that does not have a RAM AIR setup for half of the drag strip!!!

really over all of the drag strip it has a benefit but the faster you go the more gain you have...

FYI...11 inches of H20 is .809 in Hg...and for me every 800 ft is 10hp or 1 tenth...using an online DA calculator and only changing the alt. setting gives 918 ft...so i am gaining just due to the RAM effect 11.5 rwhp...So add the cold air effect of not breathing from the engine bay and you probably have around 20rwhp over stock...

My ram air is similar to a FTRA but to the extreme...

Also the tests were done in the same direction with a tail wind because when i tried on run the other way at 100 it was 2 inches higher...but i figure the gained pressure is negated more by the aerodynamics the car has to over come...aero> ram air effect (my guess)

Enjoy man that is a long thread...

James Montigny

iTrader: (13)

I'd love to see the same test with ram air (high flow filter of your choice) vs a common CAI setup.

I've kept mine functional but have no idea if there are any gains to be had VS a CAI.

Bitemark46

I don't disagree that Ram Air works but I think people's assumptions may be wrong on what's actually going on. Ram air is simple pulling cooler air outside the engine bay into the motor. The air is still going into the motor at the same velocity. THe motor is an air pump. Its only gonna suck (in N/A state) as much air as it needs. Especially at our speeds. Now traveling 250mph I'm sure it would have some effect in increasing cylinder pressure.

Getav8

Have any detailed pics of your ram air setup?

chrs1313

iTrader: (24)

well if you see at at 100 mph for me half of the drag strip i am seeing a supercharging effect of around .2 psi..so yes the engine only takes as much as it needs plus the .2 extra that is being forced in like a supercharger does...even from speeds around 40mph at going to WOT i saw positive pressure and no vacuum like i did with just the stock lid breather setup from the front 1" slit...

THIS type of setup (using the ram air effect, mine/sux2bu's etc.) is Superior to any other setup CAI or not...because they are missing the RAM air Effect...so you are leaving hp on the table...

I wish i knew a better way to translate the .2 psi felt on the top end into hp...besides just doing back to back runs at the track...sealing and unsealing the intake box becomes a pain...

Anyways i think everyone gets the idea...

chrs1313

iTrader: (24)

i do back in the day maybe like a year ago... in the external section if i am correct...

edit found it you owe me

https://ls1tech.com/forums/showthrea...245&highlight=

FASTFATBOY

iTrader: (23)

I have argued this point till I was blue in the face. I gave up.

https://ls1tech.com/forums/lt1-lt4-modifications/835241-ram-air-vs-k-n.html

It does work.

More evidence here

https://ls1tech.com/forums/drag-racing-tech/851701-ram-air-modifications-will-i-gain-track.html


Nice test!!

David

sickss228

iTrader: (27)

Great test thanks for sharing

7420NW7TH

iTrader: (8)

I used to be another ram air doubter. Not anymore. I am a believer also, 100%.

We made the ram air functional on my ws6 and along with taking out 100 lbs, shaved about 3 tenths off my et. So 2 tenths probably came from the ram air, and 1 tenth from the 100 lbs.

James Montigny

iTrader: (13)

What were you using prior to the ram air?

7420NW7TH

iTrader: (8)

nothing

snake charmer

iTrader: (118)

that is some really cool info chris .

daniel6718

iTrader: (36)

someone needs to get it functioning then get to the track unhook it from the lid....run then hook it up and run report back you 60' 1/8 1/4 mile and mph

i honestly believe in it...think of it this way..the motor only uses a basic amount of air....it has to SUCK this air into the motor...with a ram air the motor wouldent have to suck as hard therefore it would be able to get more air

DOUBT IT

iTrader: (13)

Nice to see someone gathering some real evidence of it working.

I have believed in it all along though.

I still need to get with you on making me a ram-air setup like yours. I know I asked a while back, and then didn't get back with you, but I had some bills I had to pay.

Now I have money, and I'm planning on getting ahead of you and Matt on the SI list.

studderin

iTrader: (28)

I made a SUX2BU setup, I saw a really good gain. 3 tenths and 3-4 MPH

Lid/portedTB/free ram air/tune 328whp
12.95@109.5 best mostly 13.1 13.0s 108-109

SUX2BU ramair. (And no front bumper support 19#s, under hood AC 34#s witch is needed for 4inch ducts)
12.62@113 best 2 weeks later. 12.65@112.7 12.63@113 12.72@112.8 other runs

My 1/8 was about the same. About .05 (1/2 tenth) et form the weight saving mostly. 1/8 traps before were 85.5-86 and only went to 87-88. But the higher speeds over 60MPH probally show the gains.

StoleIt

iTrader: (3)

As a pilot...trust me...ram air works. Otherwise my airspeed indicator would never read above zero (pitot system).

But on our cars? Sure it helps, but I wouldn't call the SS hood a performance upgrade.

JEB99TA

iTrader: (32)

Great test Chris ... I'm still working on timeslips with and without. The additional air charge not only works ... it rocks!

chrs1313

iTrader: (24)

sounds good man let me know when you get serious about the intake...i can send you some dimensions or make you one for the right price...if you have a ftra my intake added me around 10-12rwho over the ftra...did some back to back runs from weekend to weekend, obviously taking da and everything else into account... hit me up with a pm it is a awesome mod

daniel6718

iTrader: (36)

how are yall hooking it up to your lid? i needs that piece really....i know sux2bu made them outa aluminum but theres no way for me to have it welded and i wont do a steel one...anyone else got other ideas?

its turbo time

iTrader: (3)

Why dont i have access to this page?