Stillen vs. Smoky: your take on intakes

1slow370 · 04-02-2010, 12:48 AM

It's actually called an air horn, venturi's are what are used in carburetors and cause a pressure differential. air horns try to smooth the flow of air entering the pipe from the sides to reduce turbulence and increase flow. All the crappy JWT popcharger kits have one. You see them on ITB setups as well.

Endgame · 04-02-2010, 01:26 AM

So are JB370z's good or not?

Endgame · 04-02-2010, 11:40 PM

Quote:

Originally Posted by G37sHKS

man its simple... there is no way a SRI is better than CAI.. maybe in first run the SRI have a chance to win the CAI.. but after 2-3 runs it will drop to stock... and after 6-7 runs lol it will lose power bcuz of the hot air

Your comment does not make sense. They ran the car for 25 minutes with the TS intake on BEFORE the dyno. The engine bay would be hot already.

I have read this thread several times over and do believe this was a valid test. TS made more power and torque than Stillen. The torque thing is HUGE to me.

I am curious of the A/F ratios however. I would not want a car running too lean so that it starts pinging in the hot AZ weather..

G37sHKS · 04-03-2010, 05:41 AM

^ why you dont want ur car to be so lean?? I heard that more lean = more power...
and tune will gain some hp while fixing the lean... and yes i love my car to go lean.. so i can tune it and fix the lean and get free more HP

Kastley85891 · 04-03-2010, 07:35 AM

Too pricey for me, but probably is a good short ram, I want SG3's but for the moment I am running my do it your self <200 buck Sunday project with stock MAF housing and accurate fueling (confirmed via WB)
Sounds great, throttle response IS better, un dyno'd so cannot comment on power, although it 'feels' better then stock intake system.

Endgame · 04-03-2010, 11:43 AM

Quote:

Originally Posted by G37sHKS

^ why you dont want ur car to be so lean?? I heard that more lean = more power...
and tune will gain some hp while fixing the lean... and yes i love my car to go lean.. so i can tune it and fix the lean and get free more HP

I hear ya!!!

Zsteve · 04-03-2010, 12:58 PM

I would be curious as to the TS MAF section diameter compared to the G3 diameter. The only way the SRI will make gains is by increasing the diameter to make the car run lean and thus make some power, but the G3s do that too. I mean no matter what its a filter on a stick and there isonly so much one can do to make gains and they have all been tried and all intake makers know the tricks so I find it hard to believe the TS made more than the G3 without doing anything else to the car or dyno. They will suck in more heat than the G3s, so they have to make up for that lose somewhere and whatever they did to do that, others know it to and would have done it on the G3 too. So its all a crap shoot really and you just get what you like.

Another note Im curious about is, coming from GA to Tx and now being at a higher altitude my car is slower than it was in GA. What was the altitude density for the G3 dyno and the TS dyno? Could this make a difference in numbers?

JB-370z · 04-03-2010, 01:03 PM

Quote:

Originally Posted by JB-370z

I noticed my hks intakes had a funnel like device on the inside of the tubes, does anyone elses have this? Think it might create like a vortex like air flow but not sure. I got 281.72 whp with 231.56 tq on a dynojet with I/E/HFC's not sure if this sucks bad or not.

I never got a reponse, I was wondering if this is a crappy number. Someone told me it was.

Zsteve · 04-03-2010, 01:07 PM

Quote:

Originally Posted by JB-370z

I never got a reponse, I was wondering if this is a crappy number. Someone told me it was.

what were your numbers before? Dynos are only good for a before and after reading to see gains as they can be calibrated so many ways, Thats why one can show a high gain for a mod if they really wanted to, they tweek the dyno.

Also not all cars come from the factory with the same power, some more, some less, so you may have gain good amounts but you need the before numbers.

Zsteve · 04-03-2010, 01:14 PM

Quote:

Originally Posted by 1slow370

It's actually called an air horn, venturi's are what are used in carburetors and cause a pressure differential. air horns try to smooth the flow of air entering the pipe from the sides to reduce turbulence and increase flow. All the crappy JWT popcharger kits have one. You see them on ITB setups as well.

Some companies are using venturi style intakes to help increase the velocity of the air as it comes in. Stillen has even used this design before. I dont know if its just another name for the air horn or a different design but they are using it in CAIs. Again just a way to try and increase the velocity of the air.

1slow370 · 04-03-2010, 01:53 PM

it's just a misnomer for an air horn as putting a venturii in an intake would be a bad idea as they only increase velocity within the are of the venturii once the air passes the venturii section and expands back out it is slower than it was before it entered due to the restriction upstream. It makes a good corporate buzz word though when selling an intake FEATURING PATENTED VENTURII VELOCITY ENHANCERS!!!! The only real place for a venturii is in a carb. Air horns just seek to guide the air's entry path into the pipe to reduce turbulence and increase flow so they don't cause restriction. It really isn't going to cause HUGE gains though. I'd wager that the top secret intake may have a different diameter MAF pipe and it is running much leaner than stock to account for it's power gains. That and foam filters aren't very restrictive because they don't filter well at all personally i fell that if you are running a foam filter you might as well just run a fine mesh stainless drag filter as they both just basically filter out the big chunks.

Endgame · 04-03-2010, 02:26 PM

ZSteve - To you question about altitude for this dyno, no that would not make a difference here as both cars were dyno'd in the same shop. Good thought though....

Zsteve · 04-03-2010, 03:33 PM

I have a question in general, if running lean can make more horsepower and can be bad if too lean, how does a tune make even more horsepower after that if they adjust the AFR to be not as lean? I would think you would lose power but it would be safer on the engine.

Kastley85891 · 04-03-2010, 04:21 PM

You make peak power both sides of the equation, you can tune for peak 'rich' or peak 'lean' power, each fuel will vary for the total end target AFR/LAMBDA.
Obviously the target will vary depending on particular vehicle set up/conditions , but generally most will share the same ballpark.

1slow370 · 04-03-2010, 04:37 PM

also tuning advances the ignition curve and that advance is good for making solid gains by itself. Many tunes for these cars also feature raised redlines and extending the power curve is good for a few horsepower as well although it is superficial as you won't see benefit unless you are that high in the first place.

View Poll Results: Which intake do you think will come out on top?
Stillen G3	73	47.40%
Top Secret	48	31.17%
They will be essentially equal in HP gain.	33	21.43%
Voters: 154. You may not vote on this poll

04-02-2010, 12:48 AM	#136 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	It's actually called an air horn, venturi's are what are used in carburetors and cause a pressure differential. air horns try to smooth the flow of air entering the pipe from the sides to reduce turbulence and increase flow. All the crappy JWT popcharger kits have one. You see them on ITB setups as well. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

04-03-2010, 07:35 AM	#140 (permalink)
Kastley85891 A True Z Fanatic Join Date: Nov 2009 Location: ATX 370 - Sold Posts: 1,149 Drives: 2003 Wagon Rep Power: 18	Too pricey for me, but probably is a good short ram, I want SG3's but for the moment I am running my do it your self <200 buck Sunday project with stock MAF housing and accurate fueling (confirmed via WB) Sounds great, throttle response IS better, un dyno'd so cannot comment on power, although it 'feels' better then stock intake system. __________________ Boosted V8 hunter 2850 lbs and 375WHP Last edited by Kastley85891; 04-03-2010 at 07:38 AM.

04-03-2010, 12:58 PM	#142 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	I would be curious as to the TS MAF section diameter compared to the G3 diameter. The only way the SRI will make gains is by increasing the diameter to make the car run lean and thus make some power, but the G3s do that too. I mean no matter what its a filter on a stick and there isonly so much one can do to make gains and they have all been tried and all intake makers know the tricks so I find it hard to believe the TS made more than the G3 without doing anything else to the car or dyno. They will suck in more heat than the G3s, so they have to make up for that lose somewhere and whatever they did to do that, others know it to and would have done it on the G3 too. So its all a crap shoot really and you just get what you like. Another note Im curious about is, coming from GA to Tx and now being at a higher altitude my car is slower than it was in GA. What was the altitude density for the G3 dyno and the TS dyno? Could this make a difference in numbers? __________________ 2010 LS3 C6 Silver coupe corvette Last edited by Zsteve; 04-03-2010 at 01:04 PM.

04-03-2010, 01:53 PM	#146 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	it's just a misnomer for an air horn as putting a venturii in an intake would be a bad idea as they only increase velocity within the are of the venturii once the air passes the venturii section and expands back out it is slower than it was before it entered due to the restriction upstream. It makes a good corporate buzz word though when selling an intake FEATURING PATENTED VENTURII VELOCITY ENHANCERS!!!! The only real place for a venturii is in a carb. Air horns just seek to guide the air's entry path into the pipe to reduce turbulence and increase flow so they don't cause restriction. It really isn't going to cause HUGE gains though. I'd wager that the top secret intake may have a different diameter MAF pipe and it is running much leaner than stock to account for it's power gains. That and foam filters aren't very restrictive because they don't filter well at all personally i fell that if you are running a foam filter you might as well just run a fine mesh stainless drag filter as they both just basically filter out the big chunks. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

04-02-2010, 01:26 AM	#137 (permalink)
Endgame A True Z Fanatic Join Date: Nov 2008 Location: Phoenix Posts: 1,613 Drives: Nothing Now! Rep Power: 224	So are JB370z's good or not?

04-03-2010, 05:41 AM	#139 (permalink)
G37sHKS A True Z Fanatic Join Date: Feb 2010 Location: Dubai Posts: 1,183 Drives: 09 G37S Coupe 7AT Rep Power: 20	^ why you dont want ur car to be so lean?? I heard that more lean = more power... and tune will gain some hp while fixing the lean... and yes i love my car to go lean.. so i can tune it and fix the lean and get free more HP

04-03-2010, 02:26 PM	#147 (permalink)
Endgame A True Z Fanatic Join Date: Nov 2008 Location: Phoenix Posts: 1,613 Drives: Nothing Now! Rep Power: 224	ZSteve - To you question about altitude for this dyno, no that would not make a difference here as both cars were dyno'd in the same shop. Good thought though....

04-03-2010, 03:33 PM	#148 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	I have a question in general, if running lean can make more horsepower and can be bad if too lean, how does a tune make even more horsepower after that if they adjust the AFR to be not as lean? I would think you would lose power but it would be safer on the engine. __________________ 2010 LS3 C6 Silver coupe corvette

04-03-2010, 04:21 PM	#149 (permalink)
Kastley85891 A True Z Fanatic Join Date: Nov 2009 Location: ATX 370 - Sold Posts: 1,149 Drives: 2003 Wagon Rep Power: 18	You make peak power both sides of the equation, you can tune for peak 'rich' or peak 'lean' power, each fuel will vary for the total end target AFR/LAMBDA. Obviously the target will vary depending on particular vehicle set up/conditions , but generally most will share the same ballpark. __________________ Boosted V8 hunter 2850 lbs and 375WHP

04-03-2010, 04:37 PM	#150 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	also tuning advances the ignition curve and that advance is good for making solid gains by itself. Many tunes for these cars also feature raised redlines and extending the power curve is good for a few horsepower as well although it is superficial as you won't see benefit unless you are that high in the first place. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

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