STILLEN Longtube G3 Intakes. Review, Dyno and Impressions.

wstar · 05-14-2009, 10:37 AM

Dude, Mighty Putty doesn't hold a candle to JB Weld

smartbomb · 05-14-2009, 10:51 AM

Quote:

Originally Posted by wstar

Yeah we're not yet closing in on Mach 0.6

Ram Air is mostly bunk on cars, all it really means is a definite cold air source. As for the filter/hole placement, the Stillen Gen3 filters are near the center when installed. I actually think the Mine's holes, where they're at in the photos, wouldn't be directly over the filters anyways, they'd probably be hitting the pipe just behind each filter.

Generaly unless the air box is really optomised and even then, cold air will out power ram air 2:1 or even more. A drop of the intake air of 10-15 degrees will outpower most ram air systems, not to mention posible issues like MAF turblence that you might get with ram air.

wstar · 05-14-2009, 11:04 AM

Quote:

Originally Posted by smartbomb

Generaly unless the air box is really optomised and even then, cold air will out power ram air 2:1 or even more. A drop of the intake air of 10-15 degrees will outpower most ram air systems, not to mention posible issues like MAF turblence that you might get with ram air.

Well ram air is cold air, so it's not like cold air is going to be colder, I'm not following the logic there. And in either case I would think the air filter would smooth any incoming turbulence. I just don't think ram air systems, on most setups at most speeds, really produce any noticeable force into the intake system compared to the sucking power the engine already possesses.

smartbomb · 05-14-2009, 01:26 PM

To clarify, if you have a system that gets cold air, you will get a gain of about 1-1.5% per every 10 degree drop of intake air temp vs hot underhood air. If you made that system a ram air, it would only improve about .5-1 percent total.

If you get the pressure change that the ram air creates, you can calculate the power gain easily and you will find the the air density is incresed more by dropping the temp than the slight gains the ram air makes.

Of course Ram air is good and helps but its more important to get cold air by a factor of almost 2 in most cases.

dad · 05-14-2009, 09:33 PM

If it is your intention to actually add HP with an intake, it is better to actually draw "real" cold air , rather than suck "more" hot engine bay or radiator.

dad · 05-14-2009, 09:35 PM

Quote:

Originally Posted by wstar

Dude, Mighty Putty doesn't hold a candle to JB Weld

Excellent stuff, I agree, highly recommended!

smartbomb · 05-15-2009, 02:31 PM

Quote:

Originally Posted by dad

If it is your intention to actually add HP with an intake, it is better to actually draw "real" cold air , rather than suck "more" hot engine bay or radiator.

Its pretty simple, the colder air is, the more dense it is, this helps you two ways. You get more oxygen to burn and more expansion in the PV curve.

I am thinking that an actual moving car might have less issues with the heat than a car on the dyno, even with a huge fan. More air moving around the car might affect airflow in this area to where it makes its full power.

I htink someone here monitered the IAT with this intake under actual driving and found the temps to be good.

I think to be fair to Stillen I'll dig up the nose off dyno chart and show that and let the readers make their own conclusions.

semtex · 05-15-2009, 03:07 PM

Quote:

Originally Posted by smartbomb

I am thinking that an actual moving car might have less issues with the heat than a car on the dyno, even with a huge fan. More air moving around the car might affect airflow in this area to where it makes its full power.

Hmm...what ramifications might his have on dyno tuning? Like will the difference in airflow with the car on a dyno vs. real-world driving be enough to invalidate or compromise the ECU map loaded in from a dyno tune?

m4a1mustang · 05-15-2009, 03:14 PM

We need to put a dyno in a wind tunnel and run some tests.

miguez · 05-15-2009, 03:23 PM

Quote:

Originally Posted by semtex

Hmm...what ramifications might his have on dyno tuning? Like will the difference in airflow with the car on a dyno vs. real-world driving be enough to invalidate or compromise the ECU map loaded in from a dyno tune?

I would imagine that you'd have small differences, yes, given the fact that on a dyno, the engine is fighting the resistance of the rollers. It would depend on the dyno manufacturer and workings, but they'd have to try and simulate the increase in aerodynamic and rolling drag, as well as air compression effects after about 100 mph.

semtex · 05-15-2009, 03:33 PM

Oh well. It'll still be an improvement over just having bolt-on mods and no tune at all.

miguez · 05-15-2009, 03:39 PM

Definitely.

smartbomb · 05-16-2009, 12:16 AM

Quote:

Originally Posted by semtex

Hmm...what ramifications might his have on dyno tuning? Like will the difference in airflow with the car on a dyno vs. real-world driving be enough to invalidate or compromise the ECU map loaded in from a dyno tune?

On a MAF equiped car, it should compensate for small relativly small differences in air desisty without going to far over in the load, also I am not 100% sure but I think newer Nissans use IAT as a correction. Older Nissans like when I used to work for Nissan didnt but with things getting tight, it would not suprise me if it now was part of the fuel calculation algoritum.

What I think we should do is to put a thermocouple in the area of the air fliters and see whats actualy going in when the car is being driven.

Another thing I was thinking of is perhaps there is radiant heat transfer from the radiator.

LiquidZ · 05-16-2009, 11:49 AM

Quote:

Originally Posted by miguez

I would imagine that you'd have small differences, yes, given the fact that on a dyno, the engine is fighting the resistance of the rollers. It would depend on the dyno manufacturer and workings, but they'd have to try and simulate the increase in aerodynamic and rolling drag, as well as air compression effects after about 100 mph.

This man is an aeronautical engineer too

Alchemy · 05-23-2009, 11:29 AM

Man I need these things. That is an astonishing gain. Those guys at Stillen DO IT RIGHT!!!

05-14-2009, 10:37 AM	#166 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Dude, Mighty Putty doesn't hold a candle to JB Weld __________________ 7AT Track Car! Journal thread / Car setup details

05-14-2009, 09:33 PM	#170 (permalink)
dad Grand Prix of Endurance Join Date: Nov 2008 Location: Tennessee Posts: 3,476 Drives: Mulsanne Straight Rep Power: 25	If it is your intention to actually add HP with an intake, it is better to actually draw "real" cold air , rather than suck "more" hot engine bay or radiator. __________________ We can do without any article of luxury we have never had; but once obtained, it is not in human nature to surrender it voluntary.

05-15-2009, 03:14 PM	#174 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	We need to put a dyno in a wind tunnel and run some tests. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

05-15-2009, 03:33 PM	#176 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	Oh well. It'll still be an improvement over just having bolt-on mods and no tune at all. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

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05-14-2009, 01:26 PM	#169 (permalink)
smartbomb Banned Join Date: Jan 2009 Location: Cypress Ca Posts: 69 Drives: 300ZXTT, 350Z, 200SX Rep Power: 0	To clarify, if you have a system that gets cold air, you will get a gain of about 1-1.5% per every 10 degree drop of intake air temp vs hot underhood air. If you made that system a ram air, it would only improve about .5-1 percent total. If you get the pressure change that the ram air creates, you can calculate the power gain easily and you will find the the air density is incresed more by dropping the temp than the slight gains the ram air makes. Of course Ram air is good and helps but its more important to get cold air by a factor of almost 2 in most cases.

05-15-2009, 03:39 PM	#177 (permalink)
miguez Enthusiast Member Join Date: Apr 2009 Location: Columbus, Ohio Posts: 359 Drives: '04 Cavalier Rep Power: 181	Definitely.

05-23-2009, 11:29 AM	#180 (permalink)
Alchemy A True Z Fanatic Join Date: Jan 2009 Location: Jersey Age: 44 Posts: 4,855 Drives: to acquire tickets Rep Power: 3524	Man I need these things. That is an astonishing gain. Those guys at Stillen DO IT RIGHT!!!