CAI vs SRI & DYNO !

[FordFasteRR]

Ok, I just got back from SED's house.. I gave traded my Hyundaispeed.com SRI for my old custom-made hybrid CAI.

I almost instantly noticed a slight gain in mid-range torque... Its like almost night and day.

Now, the point of this thread... I plan to go back to the dyno next week and benchmark the car again using this new intake.

So you guys/gals can have a real life base comparison of the HP/TQ differences between an SRI & a CAI !

SWEET !!!

Can you guess what the outcome will be ?

For comparison, myy current dyno is 133 whp and 130 ft.lb wtq.

What will it be with the 3 inch CAI ?


Update: Dec 21 2004: Here is the dyno sheet ! The gains were ZERO HP & + 5.6 ft.lb of Wheel torque !

http://www.nitrousworld.com/images/dec_21_dyno.JPG

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_________________

UPDATE:

Here is an update of the install.. I also threw some pics in there of a mockup of a short version of the accord CAI.. however I decided to stay with the true CAI because the pipe is longer and is even better placed for keep power...... Also, to keep the filter right next to the battery will require cutting the accord CAI main pipe by about 2 inches.. that would make it un-reversible If i decide to go to a true CAI..

so true CAI it is ! ... :)

enjoy the pics:

(BEFORE pic, just for reference.. Hyundaispeed.com SRI )
http://www.nitrousworld.com/images/CAI_UPDATE/p1010120.jpg


http://www.nitrousworld.com/images/CAI_UPDATE/p1010121.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010122.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010123.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010124.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010125.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010126.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010127.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010128.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010129.jpg

http://www.nitrousworld.com/images/CAI_UPDATE/p1010130.jpg

[faraco3]

170 whp and 120 ft lbs

[FordFasteRR]

170 whp and 120 ft lbs


LOL

I wish ! .







. :abovelol:

[GTSTISL]

135 & 128 (i kno nothing about anything)

[htekric3r1200]

141.25 whp and 134.89 tq

[hyunelan2]

Do I win a prize if I'm closest,lol. I don't think there's gonna be much change on the dyno... just a slight one. 135whp, 131 tq.

[GTSTISL]

I hate the fact that even after u put on an intake, the hp is still 5hp under "stock"..damn hyundai, lyin bastads...and all the rest of the car companies.

[hyunelan2]

^^^ Are you sure you're not confused? Advertised HP is not at the wheels, it is not WHP as the Dyno measures. (Although Hyundai did have that false horsepower class action thingie).

[faraco3]

serious

135 whp and 132 ft lbs.

[FordFasteRR]

wow... some low estimates on the torque peek there !

I hope the torque surpasses the HP.... lol


:)

[faraco3]

Dont worry it wont ;)

[GTSTISL]

Advertised HP is not at the wheels, it is not WHP as the Dyno measures. so its at the flywheel?

[SuperGLS]

I'm interested to see the results Ford. I don't think there will be a real big gain though, although I hope their will be. Good luck.

[AUTOBOT]

Can you guess what the outcome will be ?


Well, I suppose it depends on how you conduct the experiment. It is pretty hard to measure real world driving on a Dyno, but you can get close if you do it right.

First thing is, if the numbers between the two intakes are read on different dynos or on different days, they are useless. Doing either changes the conditions and skews the numbers.

Second, if you dyno with the hood up, the numbers are useless (unless you drive around with the propped). LOL

Third, if you do the dyno with the engine cold, the numbers are useless.


If the engine is cold, or the hood is up, then chances are the SRI will get better numbers do to the shorter pipe. But in real world driving, the hood is down, and the engine is hot so the SRI sucks in hot air and reduces performance. This is why most people choose to go with a longer pipe.

Happy testing.

[SWortham]

I think you'd find a more discernible difference if you compared a turbo to a supercharger. :D

But anyway, what Autobot was describing plays a major role in the results. It's all about the temperatures. Since the advantage of a CAI is more apparent in actual driving than on a dyno, I don't know what to predict. I think that in a fair comparison the CAI would be around 136 whp and 133 ft-lbs.

[FordFasteRR]

I just added 10 pics of the CAI swap... Take a look at the first post on this thread........ :)



.

[Keyan]

http://www.nitrousworld.com/images/CAI_UPDATE/p1010128.jpg

Ford, take a look at this pic...

The dynamics of flowing air would state that if you straightened that pipe, you'd yield better results.

[GTSTISL]

It might be hard to get to that cap behind it, idk what it is but u kno what i mean

[FordFasteRR]

..............

Ford, take a look at this pic...

The dynamics of flowing air would state that if you straightened that pipe, you'd yield better results.


I know , but this is what I have to work with. lol

[CTele02]

To get a "real world" comparison i think you'd get a better estimate by using 1/4 mile times. Bring both setups to the track, tools, and do a couple runs with the SRI and then swap to the CAI.

[GTSTISL]

Yea that sounds like a better idea, that way you can actually feel the difference rather than a computer tellin u.

[FordFasteRR]

Dyno completed.

!!!!!!!!

I will post the dyno sheet in a few minutes...

:)

UPDATE ON THE GUESSES:


135 & 128 (i kno nothing about anything)


Close, but not a winner...

170 whp and 120 ft lbs


Funny !!!!!!!!!!

[GTSTISL]

Was i the closest?

[FordFasteRR]

141.25 whp and 134.89 tq


close on the torque guess.... but HP was waaaayyyy off.

[hyunelan2]

SO the final, tested, proven Dyno result of SRI vs. CAI is a differnece of ZERO HP, but 5.6 extra Tq on the CAI, huh? Well, that settles that. Now do the Dyno test of Supercharger Vs. Turbocharger, lol.

[FordFasteRR]

Do I win a prize if I'm closest,lol. I don't think there's gonna be much change on the dyno... just a slight one. 135whp, 131 tq.


close... :)

[KeWLKaT]

Yay so I'm gonna be good with my SRI after the winter :D

[hyunelan2]

^^^ no. You're losing out on 5.6 tq by using a SRI. This dyno proves all the previous assumptions that a CAI is better.

[CTele02]

This proves that the CAI gives you 5more lbs torque when the car is stationary... a real world estimate with weather, air pressure, wind and all the other crap that you have to drive thru will show the exact differences... Plus Ford's motor is already highly modded, so it probably utilizes the extra air it receives better than stock. Everyone's motor and climate is different but in his case (Florida) hes better off with the CAI. (Until hurricane season arrives, then we're all screwed...)

[SWortham]

Very interesting. I can also feel the difference between my SRI and my CAI. I knew that my butt dyno combined with theory must amount to something. Now we have actual dyno results as well. Thanks Ford. :)

As for which is better overall... well there's no real winner. An SRI is still safer when it comes to avoiding hydrolocking your engine. Unless you use a bypass valve with a CAI, of course. But if you do use a bypass valve, I think you'll lose 1 or 2 hp.

[FordFasteRR]

well, I'm glad I was able to help you guys out with some dynos...

I did it mostly to find out for myself, however, here is a tally of my dynoes & investments I've made into it..

first dyno in nov.

then 3 more dynoes in dec..

total for each dyno is $79 + tas (6%)
the last two dynos i got for 69 and 65 respectively..

so total is approximately $ 300 +

ouch !

^^^ no. You're losing out on 5.6 tq by using a SRI. This dyno proves all the previous assumptions that a CAI is better.


i think that the gains of the cai are as a result of the length of the pipe more than the intake temps..

however once moving on the road, the air pressure builds up higher with the cai than with the sri ... so the cai wins every time.. it wins on the dyno & it wins on the track & it wins on the street...

:) :bowdown:

[Gomez]

I think this thread should be sticky.

[RonnieSan]

Awesome... I switched my CAI to an SRI for the rainy season, but it only rained lightly once since I did it. This settles it, I'm going back to CAI tonight. Stupid unpredictable San Diego weather.

[FordFasteRR]

i'm just glad I FINALLY cleared this up.

http://www.nitrousworld.com/images/CAI_UPDATE/p1010128.jpg

Ford, take a look at this pic...

The dynamics of flowing air would state that if you straightened that pipe, you'd yield better results.


I just wanted to reply to this (again)...

If i would replace the bend on this pipe with a straight one, how much power & torque do you think I will gain ?

Does anyone think there will be a gain ?

if so, how much ?

[CTele02]

Heres a suggestion... why not just turn the whole motor around... the intake faces the front and the exhaust faces the back.... then you'll see some gains!

[FordFasteRR]

Heres a suggestion... why not just turn the whole motor around... the intake faces the front and the exhaust faces the back.... then you'll see some gains!


ok then. I'll do that today. :abovelol: :eek: :rolleyes:

[CTele02]

Make sure you put at least 2 metal spirals in your intake when you straighten it out as well :)

[SWortham]

Heres a suggestion... why not just turn the whole motor around... the intake faces the front and the exhaust faces the back.... then you'll see some gains!
Yes, your car will go backwards exceptionally well. ;)

[Keyan]

Ford, I'm gonna take a shot in the dark and say you'd get 3-6ft/lbs of more torque if you straightened the pipe.

[FordFasteRR]

Ford, I'm gonna take a shot in the dark and say you'd get 3-6ft/lbs of more torque if you straightened the pipe.


somehow, i highly doubt it.

I am willing to bet that there will no gains at all with a straight pipe, however, I will never find out.

[GTSTISL]

What kind of gains would you get with a CAI vs SRI in terms of gas mileage?