Sheetmetal intake for FI
Sheetmetal intake for FI Anyone experimented with sheetmetal intake vs. GMPP single plane carb intake and elbow?
I believe I read somewhere that Turbos don't like great big plenums, which this doesn't have.
Putting together Stenod Twin GT 40's, ET 265 heads, Solid roller 388 (4.125 x 3.622).
Can pick this intake up 1/2 off.
http://www.mrnitrous.com/LS-SPYDER%20MANIFOLD.htm
I believe I read somewhere that Turbos don't like great big plenums, which this doesn't have.
Putting together Stenod Twin GT 40's, ET 265 heads, Solid roller 388 (4.125 x 3.622).
Can pick this intake up 1/2 off.
http://www.mrnitrous.com/LS-SPYDER%20MANIFOLD.htm
I've got a Beck sheetmetale intake to try at some point. I want to compare it to a single plane.
One expert said that the results might be the same, but the single plane might have better fuel distribution to all of the individual cylinders. Most sheetmetal intakes like a Beck have some compromise since most folks want them to fit under a stock hood without modifications. In the case of the Beck, the runners are not as long as some might want but as you know most single plane stuff requires either custom elbows to fit or hood and cowl modifications to fit.
One expert said that the results might be the same, but the single plane might have better fuel distribution to all of the individual cylinders. Most sheetmetal intakes like a Beck have some compromise since most folks want them to fit under a stock hood without modifications. In the case of the Beck, the runners are not as long as some might want but as you know most single plane stuff requires either custom elbows to fit or hood and cowl modifications to fit.
Originally Posted by Pro Stock John
I've got a Beck sheetmetale intake to try at some point. I want to compare it to a single plane.
One expert said that the results might be the same, but the single plane might have better fuel distribution to all of the individual cylinders. Most sheetmetal intakes like a Beck have some compromise since most folks want them to fit under a stock hood without modifications. In the case of the Beck, the runners are not as long as some might want but as you know most single plane stuff requires either custom elbows to fit or hood and cowl modifications to fit.
One expert said that the results might be the same, but the single plane might have better fuel distribution to all of the individual cylinders. Most sheetmetal intakes like a Beck have some compromise since most folks want them to fit under a stock hood without modifications. In the case of the Beck, the runners are not as long as some might want but as you know most single plane stuff requires either custom elbows to fit or hood and cowl modifications to fit.
https://ls1tech.com/forums/forced-induction/433123-my-friend-pretty-busy.html
I'm not a motor expert, but do deal with fluid (air) flow in my line of work.
I don't think runner length should have that much of an effect on FI applications, especially @ 20+PSI. I would think its more about making sure each cylinder gets fed the same. Buy having a plenum feed the runners they should get better and equal distribution.
An elbow directly above the intake cannot be the best. The air will tend crowd the outside radius and potentially starve the front cylinders.
As far as fuel distribution goes individual injectors are still placed at same spot.
I may be all wet....... but dynos don't lie......lets see some results posted
thanks
Brad
Originally Posted by 422 ragtop
Is your friend going to try it?
https://ls1tech.com/forums/showthread.php?t=433123
I'm not a motor expert, but do deal with fluid (air) flow in my line of work.
I don't think runner length should have that much of an effect on FI applications, especially @ 20+PSI. I would think its more about making sure each cylinder gets fed the same. Buy having a plenum feed the runners they should get better and equal distribution.
An elbow directly above the intake cannot be the best. The air will tend crowd the outside radius and potentially starve the front cylinders.
As far as fuel distribution goes individual injectors are still placed at same spot.
I may be all wet....... but dynos don't lie......lets see some results posted
thanks
Brad
https://ls1tech.com/forums/showthread.php?t=433123
I'm not a motor expert, but do deal with fluid (air) flow in my line of work.
I don't think runner length should have that much of an effect on FI applications, especially @ 20+PSI. I would think its more about making sure each cylinder gets fed the same. Buy having a plenum feed the runners they should get better and equal distribution.
An elbow directly above the intake cannot be the best. The air will tend crowd the outside radius and potentially starve the front cylinders.
As far as fuel distribution goes individual injectors are still placed at same spot.
I may be all wet....... but dynos don't lie......lets see some results posted
thanks
Brad
Far as runner length, is veleocity still a factor even in FI setup? Im working on an intake and going to great pains and CAD to maintain long runner length by crossing over the the opposite side before joining the plenum. Also, I have read and researched that plenum volume on FI almost cannot be too large. Bigger the better.
Originally Posted by Lasershop
Far as runner length, is veleocity still a factor even in FI setup? Im working on an intake and going to great pains and CAD to maintain long runner length by crossing over the the opposite side before joining the plenum. Also, I have read and researched that plenum volume on FI almost cannot be too large. Bigger the better.
The LS 6 liter truck manifolds have long runners.....great for low end torque....but kill the motor at anything over 5000 RPM.
I agree with you on the plenum volume.....probably only a concern on NA applications.
Keep thinking out loud
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I believe I read somewhere that Turbos don't like great big plenums
http://www.proturbokits.com/gallery/...ic=11&offset=9
http://www.proturbokits.com/gallery/...ic=31&offset=9
http://www.proturbokits.com/gallery/...ic=67&offset=0
some decent sized plemuns.... they used to have soem more pics with other larger ones on the site
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Ive also read that you should have a larger plenum for FI, I think its Ideal volume should be like 1/3 your cubic inches, or something close to that I forget the exact number. Anyone else hear anything like that?
