Victor Intake Mani vs FAST 90 Intake Mani
10-26-2006, 03:13 PM
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Victor Intake Mani vs FAST 90 Intake Mani which intake would be better on a H/C LSX and why??
How does the victor compare to the FAST 90 intake manifold in regards to cfms and performance???
How does the victor compare to the FAST 90 intake manifold in regards to cfms and performance???
10-26-2006, 04:49 PM
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The carbed intake will make more power than the 90mm fast, but it takes a lot of fab work and may require triming the cowl and hood depending on which elbow you use. I would only do the victor on a fi or nitrous car. Fast is a much eaiser install and fabs up with the stock rails.
10-26-2006, 06:27 PM
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I have always read that the victor Jr. will make more peak horsepower but on a stock cubed NA LS1 it will give up some lowend torque.
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10-27-2006, 12:29 AM
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with an elbow you dont have to modify anything. with a 4400 stall why the hell do you care about anything below 4k anyways.. itll be the same price or less than a FAST. and people have had various issues with FASTs
10-28-2006, 09:31 AM
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i am wanting to do a v.jr setup on my planned 370 cubed motor...... what cam would suit this best... i assume a torquer type cam will not be as complimentry as a high rpm hp cam. ...
basically a 224/224 type vs a TRex cam..... I assume the cams that peak over 6400rpm are more suited than those that peak 6000.....
so what cam with a 370?
basically a 224/224 type vs a TRex cam..... I assume the cams that peak over 6400rpm are more suited than those that peak 6000.....
so what cam with a 370?
10-28-2006, 11:32 AM
#10
I have done some flow comparisons in the past on both of these intakes through 2 different sets of 225 cylinder heads.The Victor Jr. flowed 5 cfm more than the Fast through both sets of heads that I had at the time.Also, there was a 30 cfm loss from the head flow #'s from both intakes. With the short runners of the Victor intake, you will most defenatly sacrifice low end power.
10-29-2006, 04:17 PM
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Originally Posted by Firehawk441
I have done some flow comparisons in the past on both of these intakes through 2 different sets of 225 cylinder heads.The Victor Jr. flowed 5 cfm more than the Fast through both sets of heads that I had at the time.Also, there was a 30 cfm loss from the head flow #'s from both intakes. With the short runners of the Victor intake, you will most defenatly sacrifice low end power.
Was this testing a stock or ported Vic Jr? The stock ports are horribly small compared to any ported head. I think porting the Vic Jr would have exceptional results. Where the FAST setup doesn't have a whole lot to improve on...
10-30-2006, 05:37 AM
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Originally Posted by FirstGen
Was this testing a stock or ported Vic Jr? The stock ports are horribly small compared to any ported head. I think porting the Vic Jr would have exceptional results. Where the FAST setup doesn't have a whole lot to improve on...
10-30-2006, 02:29 PM
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unless you are going fi or just have some huge comp engine, stick with the ls6 or fast manifold.
The carb style manifold provide even air flow instead of forcing air into the rear cyls when using FI.
The sharp 90 that is needed to connect to a tb does also hamper air flow but is not noticed with the use of FI , but with a H/C , you are going to feel it even worse in the low end.
I have stated many times i am a fan of the carb style manifolds which is why i am using one, but you need the right part for your combo not just cause it looks or sounds kwel.
The carb style manifold provide even air flow instead of forcing air into the rear cyls when using FI.
The sharp 90 that is needed to connect to a tb does also hamper air flow but is not noticed with the use of FI , but with a H/C , you are going to feel it even worse in the low end.
I have stated many times i am a fan of the carb style manifolds which is why i am using one, but you need the right part for your combo not just cause it looks or sounds kwel.
10-30-2006, 05:38 PM
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Originally Posted by KHShapiro
unless you are going fi or just have some huge comp engine, stick with the ls6 or fast manifold.
The carb style manifold provide even air flow instead of forcing air into the rear cyls when using FI.
The sharp 90 that is needed to connect to a tb does also hamper air flow but is not noticed with the use of FI , but with a H/C , you are going to feel it even worse in the low end.
I have stated many times i am a fan of the carb style manifolds which is why i am using one, but you need the right part for your combo not just cause it looks or sounds kwel.
The carb style manifold provide even air flow instead of forcing air into the rear cyls when using FI.
The sharp 90 that is needed to connect to a tb does also hamper air flow but is not noticed with the use of FI , but with a H/C , you are going to feel it even worse in the low end.
I have stated many times i am a fan of the carb style manifolds which is why i am using one, but you need the right part for your combo not just cause it looks or sounds kwel.
No need to run a 90 elbow, just use a 4150 flange tb. That's what I'm using.
10-30-2006, 07:49 PM
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Originally Posted by FirstGen
No need to run a 90 elbow, just use a 4150 flange tb. That's what I'm using.
10-30-2006, 08:01 PM
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I picked up 4rwhp going from an unported fast to an unported vic jr and the tq curves were IDENTICAL. I had the vic jr port matched and picked up 8cfm. probably the same that would have been gained with porting the fast 90/90. this was with a carb style TB on the vic jr. no gains at the track.
10-30-2006, 09:42 PM
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Originally Posted by KHShapiro
FirstGen, You are right and wrong at the same time. what you are running(porsche) and what i am running (1st gen)we can use the 4150, but with a 4th gen you cant, there is not only the limited air flow that comes with being half under the cowl, but not enough clearance for a tall air filter to allow for the cfm needed for an lsx displacement, i am not even sure if you could get an air filter that small to fit under the cowl with out dropping the engine 2 inches, which is out of the realm of 80% of peoples ability.
I always thought of a 70 Camaro as a second generation... Anyways, yes it would require either cutting the cowl area or being creative with an offset filter design which I have run on many 500+ rwhp cars. Hell most of the cobra cars we build with stacked injection almost touch the underhood and still hit 500-600 rwhp.
To each their own though.
Last edited by FirstGen; 10-30-2006 at 09:47 PM.
10-31-2006, 07:40 AM
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Originally Posted by KHShapiro
383ss have any pictures of your set up so we can see cowl clearance with your carb style tb w/air cleaner on it or if it is a carb style with elbow on it?
ya, I wrote a tread about it with pics when I put it together. its in this section somewhere...