vortech FAQ: read this before asking vortech questions
08-08-2010, 01:53 PM
#1421
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^ i think he answered your original question already. wider should provide more cooling, but there is a point where the additional width decreases flow. as to why the 28" one exists when its rated at slightly lower power, my guess is it just comes down to demand. some folks want a wider intercooler for aesthetic reasons, the 28" one may work better in some applications, etc. etc. etc.
08-08-2010, 02:07 PM
#1422
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wider=longer path for air to travel=more resisitance=less flow.
it's simple physics.
The longer your path traveled will increase resistance. So say the 24" wide will have a 1psi pressure drop the 28" wide will have a 1.2psi pressure drop due to increased resistance. A drop in pressure decreases flow, therefore it will only flow for 500 hp, not 550hp.
neither of which will matter because you'll never get an sc trim over that. Both flow more than the stock cooler and i pushed it to 507 dj. So you won't have an issue.
so in recap, if you ONLY change the width the flow will decrease. It has nothing to do with cooling the charge. It has to do with the resistance on the air effecting the flow. Less flow means less hp output.
They put "xxx HP rating" because the laymen doesn't understand flow. If you look at CFM you'll see a decrease in cfm on the wider one. To bring it back up to 550hp you would have to either make it thicker or taller to increase cross sectional area that air flows through.
08-08-2010, 02:10 PM
#1423
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THAT is why. Now if he needed more "flow" he could use the more narrow one but he would sacrifice his cooling since the face has less surface area for ambient airflow.
08-08-2010, 08:16 PM
#1425
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eh, slightly. It gets under my skin when a person talks trash and challenges a company about why they build something "so stupid" when they don't even know the purpose of the produce.
If they learned how intercoolers work and how engineering behind air flow then they would completely understand.
I layed out the answer and it was disreguarded so whatever.
If they learned how intercoolers work and how engineering behind air flow then they would completely understand.
I layed out the answer and it was disreguarded so whatever.
08-08-2010, 08:20 PM
#1426
I wonder if those hp ratings are crank hp or whp? 
exactly correct
not really correct. It comes down to a person that has 450hp. He wants to reduce intake temps. His power is 450 so either an intercooler ratedf or 500hp or 550hp will both work. The wider one will provide MORE cooling because it has higher surface area on teh face of the cooler than the narrower one. It won't affect his performance because it still flows enough for his power level but it will cool better.
THAT is why. Now if he needed more "flow" he could use the more narrow one but he would sacrifice his cooling since the face has less surface area for ambient airflow.
not really correct. It comes down to a person that has 450hp. He wants to reduce intake temps. His power is 450 so either an intercooler ratedf or 500hp or 550hp will both work. The wider one will provide MORE cooling because it has higher surface area on teh face of the cooler than the narrower one. It won't affect his performance because it still flows enough for his power level but it will cool better.
THAT is why. Now if he needed more "flow" he could use the more narrow one but he would sacrifice his cooling since the face has less surface area for ambient airflow.
08-09-2010, 01:43 PM
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exactly correct
not really correct. It comes down to a person that has 450hp. He wants to reduce intake temps. His power is 450 so either an intercooler ratedf or 500hp or 550hp will both work. The wider one will provide MORE cooling because it has higher surface area on teh face of the cooler than the narrower one. It won't affect his performance because it still flows enough for his power level but it will cool better.
THAT is why. Now if he needed more "flow" he could use the more narrow one but he would sacrifice his cooling since the face has less surface area for ambient airflow.
not really correct. It comes down to a person that has 450hp. He wants to reduce intake temps. His power is 450 so either an intercooler ratedf or 500hp or 550hp will both work. The wider one will provide MORE cooling because it has higher surface area on teh face of the cooler than the narrower one. It won't affect his performance because it still flows enough for his power level but it will cool better.
THAT is why. Now if he needed more "flow" he could use the more narrow one but he would sacrifice his cooling since the face has less surface area for ambient airflow.
Certainly wasnt calling it stupid, was just looking for a second opinion.
08-09-2010, 03:37 PM
#1434
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4shizzle, your test pipes will remove a lot of restriction at the exhaust. The cats are the most restrictive part. More exhaust flow will lower backpressure so boost number will drop.
It was my understanding that the rev up engines will have 1psi more than the non-rev engines for the same pulley size. That's straight from vortech's site.
08-09-2010, 05:39 PM
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oh, i didn't mean to imply you said it was stupid if i did. It all has a purpose, sometimes it just doesn't make sense when you first take a look at it but it clears up once you start thinking of the physics behind it.
4shizzle, your test pipes will remove a lot of restriction at the exhaust. The cats are the most restrictive part. More exhaust flow will lower backpressure so boost number will drop.
It was my understanding that the rev up engines will have 1psi more than the non-rev engines for the same pulley size. That's straight from vortech's site.
4shizzle, your test pipes will remove a lot of restriction at the exhaust. The cats are the most restrictive part. More exhaust flow will lower backpressure so boost number will drop.
It was my understanding that the rev up engines will have 1psi more than the non-rev engines for the same pulley size. That's straight from vortech's site.
Btw, you mentioned that the CFM was lower for the 28" one, where did you find that info? I dont see it listed on that page anywhere.
08-09-2010, 05:47 PM
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It doesn't have to be listed. A longer intercooler that uses the same type of core as the shorter version will have a lower CFM due to added friction. It's physics...lol.
10-17-2010, 12:26 AM
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hey guys,
thought it was time to re-open this awesome thread (:
can someone maybe give a short summary of the different blowers and impeller options out there including expected power output and their best applications?
thnx!
thought it was time to re-open this awesome thread (:
can someone maybe give a short summary of the different blowers and impeller options out there including expected power output and their best applications?
thnx!
Last edited by scenehouser; 10-17-2010 at 12:39 AM.
10-17-2010, 03:51 AM
#1439
obviously you can check the current stuff on vortech's website. All the new ones for the VQ are V3 SCi impellers. Thats superior to all the older V2 SC trim stuff.
There are 3 differnt blower in the legacy line
V1,V2, and the new V3. V1 only has the T-trim. Its has straight cut gears and is a bigger blower than the SC trims.
V2 is the normal SC trim. You could get a Si impeller upgrade for that. Also the 928M impeller fit that model as well.
V1 and V2 use the engines oil system.
V3s are internally lubricated. Older models came with the regular impeller, but could be upgraded to Si impeller. Moot point now, as all new ones come with an update SCi impeller.
Finally there's the YSI. its huge, makes huge HP, and would need some body work on the car to make it fit. No one has put it on a G/Z yet. Pulley'd down, it would made deep into 600s maybe more.
As for power, its all over the place depending on pulleys and cars. Everyone says that the 928M impeller is so much better, but there hasnt been one car making more power than similarly setup stock impellers. That maybe due to the cars they were installed on, but nonetheless, there's no max hp data.
In basic terms they lines would fall like this (assuming same pulley)
V2 SC ~ V3 SC < V2 SI ~V3 Si < V3 SCi < V1 T trim < Ysi
There are 3 differnt blower in the legacy line
V1,V2, and the new V3. V1 only has the T-trim. Its has straight cut gears and is a bigger blower than the SC trims.
V2 is the normal SC trim. You could get a Si impeller upgrade for that. Also the 928M impeller fit that model as well.
V1 and V2 use the engines oil system.
V3s are internally lubricated. Older models came with the regular impeller, but could be upgraded to Si impeller. Moot point now, as all new ones come with an update SCi impeller.
Finally there's the YSI. its huge, makes huge HP, and would need some body work on the car to make it fit. No one has put it on a G/Z yet. Pulley'd down, it would made deep into 600s maybe more.
As for power, its all over the place depending on pulleys and cars. Everyone says that the 928M impeller is so much better, but there hasnt been one car making more power than similarly setup stock impellers. That maybe due to the cars they were installed on, but nonetheless, there's no max hp data.
In basic terms they lines would fall like this (assuming same pulley)
V2 SC ~ V3 SC < V2 SI ~V3 Si < V3 SCi < V1 T trim < Ysi