408 w/ vic jr. dyno #'s after T/B change!
05-19-2009, 08:03 PM
#81
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The carb hat to me does not hurt the flow with the 4150 throttle body that much because the 4150 TB will will straighten the air out before it enters the plenum and distributes the air evenly to all of the runners,unlike a elbow setup that can't straighten the air enough to keep from starving the front two runners. You answered your own question with the fact that it is not a pressureized setup like a turbo or S/C setup to where the air is forced in and needs more of a smoother turn radius hat or elbow setup. It does not have to straighten the air out in the plenum because of the forced being applied from the turbo or S/C will insure the runners get enough air. See if a buddy has a 4150 TB that will let you swap them for testing,i promise you will smile like a **** eatin dog after you get on the throttle.
I'll try to get some runs in with and without the carb hat on to see how much or if any difference is made. I'm willing to bet the carb hat is not hurting performace much at all on a NA setup.
05-20-2009, 05:25 AM
#82
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I really like how you did that, my biggest fear was getting an air filter on the TB if I wanted to street drive the car. I really like that setup.
I'd be curious to see the difference at the track and on a dyno between no hat and with.
I'd be curious to see the difference at the track and on a dyno between no hat and with.
05-20-2009, 08:15 AM
#83
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A friend of mine has the exact same setup on his 408ci motor,maybe we can test his also to see if we both get the same results.
05-20-2009, 03:56 PM
#84
Who says you have to run the carb hat at the track?
The carb hat to me does not hurt the flow with the 4150 throttle body that much because the 4150 TB will will straighten the air out before it enters the plenum and distributes the air evenly to all of the runners,unlike a elbow setup that can't straighten the air enough to keep from starving the front two runners. You answered your own question with the fact that it is not a pressureized setup like a turbo or S/C setup to where the air is forced in and needs more of a smoother turn radius hat or elbow setup. It does not have to straighten the air out in the plenum because of the forced being applied from the turbo or S/C will insure the runners get enough air. See if a buddy has a 4150 TB that will let you swap them for testing,i promise you will smile like a **** eatin dog after you get on the throttle.
I'll try to get some runs in with and without the carb hat on to see how much or if any difference is made. I'm willing to bet the carb hat is not hurting performace much at all on a NA setup.
The carb hat to me does not hurt the flow with the 4150 throttle body that much because the 4150 TB will will straighten the air out before it enters the plenum and distributes the air evenly to all of the runners,unlike a elbow setup that can't straighten the air enough to keep from starving the front two runners. You answered your own question with the fact that it is not a pressureized setup like a turbo or S/C setup to where the air is forced in and needs more of a smoother turn radius hat or elbow setup. It does not have to straighten the air out in the plenum because of the forced being applied from the turbo or S/C will insure the runners get enough air. See if a buddy has a 4150 TB that will let you swap them for testing,i promise you will smile like a **** eatin dog after you get on the throttle.
I'll try to get some runs in with and without the carb hat on to see how much or if any difference is made. I'm willing to bet the carb hat is not hurting performace much at all on a NA setup.
Robert
05-22-2009, 09:50 AM
#90
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[QUOTE=SIC LSX;10659967]user dlove went from from stock l76 intake and 92mm tb to this and didnt gain anything in the 1/4! Ran same time 
QUOTE]
He should try a vic jr. instead of the GMPP intake
QUOTE]
He should try a vic jr. instead of the GMPP intake
05-26-2009, 09:23 PM
#95
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No new times yet. I got a few issues with some other things on the car i need to resolve before i head back. I'll post up comparisions with the hat on and off when i go.
06-09-2009, 12:28 PM
#96
I am running the ultra low profile Edelbrock elbow. My porter flowed the heads intake and elbow all together and claimed the elbow did nothing negative to the flow. He claimed the Aarons elbow hurt the flow. I can tell you my 408 is highly modified and should make some killer power, BUT it does not!! The car only turned 12.77 ET at 104mph! This is crap! The stock 346 with a MS3 cam did that! I am at 3500 feet elevation and the DA out here is 5000+ but still, I think I am missing at least 150hp! I have checked everything I can think of and can not find anything wrong. All I can come up with is the elbow. That ultra low profile elbow has to be killing the flow on the big end. I bet if I went to the one Aaron makes the car would wake up.
This is my question: I am installing a GT88 rear mount at this time one the car. Do you think it is even worth changing the elbow out if I am FI the car?
This is my question: I am installing a GT88 rear mount at this time one the car. Do you think it is even worth changing the elbow out if I am FI the car?
06-09-2009, 02:47 PM
#97
Robert
06-09-2009, 03:04 PM
#99
I am running the ultra low profile Edelbrock elbow. My porter flowed the heads intake and elbow all together and claimed the elbow did nothing negative to the flow. He claimed the Aarons elbow hurt the flow. I can tell you my 408 is highly modified and should make some killer power, BUT it does not!! The car only turned 12.77 ET at 104mph! This is crap! The stock 346 with a MS3 cam did that! I am at 3500 feet elevation and the DA out here is 5000+ but still, I think I am missing at least 150hp! I have checked everything I can think of and can not find anything wrong. All I can come up with is the elbow. That ultra low profile elbow has to be killing the flow on the big end. I bet if I went to the one Aaron makes the car would wake up.
This is my question: I am installing a GT88 rear mount at this time one the car. Do you think it is even worth changing the elbow out if I am FI the car?
This is my question: I am installing a GT88 rear mount at this time one the car. Do you think it is even worth changing the elbow out if I am FI the car?
All in all the Edelbrock Low profile and High flow elbows are nice engineered pieces. they have the internal divider to optimize flow quantity and distribution into the manifold, no more lean front cylinder issues. This is the piece for you guys spraying at the TB. Some have had distribution problems with the spray on the single plains and sheet metal intakes, which have also resulted in low produced spray numbers.
I think I have some pictures of the above discussed elbows if anyone would like to see them.
Robert
06-11-2009, 07:59 PM
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For FI the Ultra low elbow will likely work as well as any. But for n/a it's certainly limited as is my low profile sheet metal elbow. I am going to try the Low Profile Edelbrock elbow which has a "Bore Center Line" (BCL) of 2" compared to the ultra low @ 1/2" BCL. This really is the indicator of how restrictive the Ultra low can and is. The flange angle is 102° on the Ultra and 95° on the Low Profile Elbow. This angle also shows how much was compromised on the Ultra Low, the Low profile elbow is only 5° off from a true 90° cast elbow. Also using the Low Profile cast elbow I can add a spacer under it should I need even better flow and to make it closer to the Edelbrock High flow cast elbow which has a BCL of 4.5". I just don't want a big ugly scoop on the hood of my Vette and thus the reason trying to use the lower than optimum profile.
All in all the Edelbrock Low profile and High flow elbows are nice engineered pieces. they have the internal divider to optimize flow quantity and distribution into the manifold, no more lean front cylinder issues. This is the piece for you guys spraying at the TB. Some have had distribution problems with the spray on the single plains and sheet metal intakes, which have also resulted in low produced spray numbers.
I think I have some pictures of the above discussed elbows if anyone would like to see them.
Robert
All in all the Edelbrock Low profile and High flow elbows are nice engineered pieces. they have the internal divider to optimize flow quantity and distribution into the manifold, no more lean front cylinder issues. This is the piece for you guys spraying at the TB. Some have had distribution problems with the spray on the single plains and sheet metal intakes, which have also resulted in low produced spray numbers.
I think I have some pictures of the above discussed elbows if anyone would like to see them.
Robert
Your in for a shock if you think that elbow will clear the hood for a vette. I had to notch the inner skin of my sunoco hood for mine to fit and had to notch the inside of my buddies WS6 hood for it to close and it is tight with the hood latched. Add a 1" spacer and your busting through the hood like pam andersons ***** in a two peice bikini. Check page one and you will see my low profile elbow setting on top of my Victor Jr intake (just for show).