View Poll Results: Which Manifold??
LS6
95
85.59%
BBK
16
14.41%
Voters: 111. You may not vote on this poll
BBK vs. LS6 (Intake Manifold)
QUOTE: I mean would you not use one of these intakes because they're made from aluminum?
Exactly.............Thats why it's heavier and suffers from heatsoak, and the reason I won't use one. 
Exactly.............Thats why it's heavier and suffers from heatsoak, and the reason I won't use one. 
TECH Resident
Joined: Apr 2005
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From: chicago burbs
Originally Posted by technical
I mean would you not use one of these intakes because they're made from aluminum?
http://www.katechengines.com/street_...s/DSCF0584.JPG (just the TB's are Al)
http://www.mycylo.com/(23sjl1eedhmcc...e.aspx?id=4999
http://users3.ev1.net/~black_ops/aus/dsc00037.jpg
http://www.katechengines.com/street_...s/DSCF0584.JPG (just the TB's are Al)
http://www.mycylo.com/(23sjl1eedhmcc...e.aspx?id=4999
http://users3.ev1.net/~black_ops/aus/dsc00037.jpg
Originally Posted by slayer6x6
Ive seen a few custom sheet metal LS1 intakes that were made strictly for racing purposes. Why would they be using aluminum if heat soak is costing that much HP?
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Joined: Mar 2004
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From: Fat Chance Hotel
The second one (Harrop Hurricane) does have more pieces that aren't shown. Two boxes that connect to inlets and ultimately air filters.
http://www.harrop.com.au/products/intake_systems.html
http://www.harrop.com.au/products/intake_systems.html
Originally Posted by slayer6x6
Ive seen a few custom sheet metal LS1 intakes that were made strictly for racing purposes. Why would they be using aluminum if heat soak is costing that much HP?
TECH Apprentice
Joined: Nov 2001
Posts: 329
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From: SoFla
because they cant afford the tools it would take to mold a custom composite intake?
They do look bad-*** and I'm sure they perform well too.
Lots of good info in this post. For me, running an all aluminum LS1 makes me want to keep it as cool as possible.
Last edited by DRGnFLYZ28; Dec 16, 2005 at 12:43 PM.
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Tenured Member
Joined: Jan 2002
Posts: 169
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From: MN
Aluminum Vs Composite There is no contest, The LS-6 or the FAST are always more powerful. we just finished a 13 manifold test for Street Thunder magazine. The aluminum manifold in that test was soft every where, by about 5lb ft. and 10 hp.
The only reason to used the aluminum intake is if you want to polish the intake. We offer two different versions of the LS-6 intake, Our oval entry 75MM by90MM and Our 90MM entry and we have the throttle bodies to go with them.
Myron C
TPIS 952 448 5330
The only reason to used the aluminum intake is if you want to polish the intake. We offer two different versions of the LS-6 intake, Our oval entry 75MM by90MM and Our 90MM entry and we have the throttle bodies to go with them.
Myron C
TPIS 952 448 5330
Originally Posted by TPiS
There is no contest, The LS-6 or the FAST are always more powerful. we just finished a 13 manifold test for Street Thunder magazine. The aluminum manifold in that test was soft every where, by about 5lb ft. and 10 hp.
The only reason to used the aluminum intake is if you want to polish the intake. We offer two different versions of the LS-6 intake, Our oval entry 75MM by90MM and Our 90MM entry and we have the throttle bodies to go with them.
Myron C
TPIS 952 448 5330
The only reason to used the aluminum intake is if you want to polish the intake. We offer two different versions of the LS-6 intake, Our oval entry 75MM by90MM and Our 90MM entry and we have the throttle bodies to go with them.
Myron C
TPIS 952 448 5330
Well, there you have it! I guess there's nothing more to debate.....
Originally Posted by TPiS
There is no contest, The LS-6 or the FAST are always more powerful. we just finished a 13 manifold test for Street Thunder magazine. The aluminum manifold in that test was soft every where, by about 5lb ft. and 10 hp.
The only reason to used the aluminum intake is if you want to polish the intake. We offer two different versions of the LS-6 intake, Our oval entry 75MM by90MM and Our 90MM entry and we have the throttle bodies to go with them.
Myron C
TPIS 952 448 5330
The only reason to used the aluminum intake is if you want to polish the intake. We offer two different versions of the LS-6 intake, Our oval entry 75MM by90MM and Our 90MM entry and we have the throttle bodies to go with them.
Myron C
TPIS 952 448 5330
Staging Lane
Joined: Oct 2003
Posts: 52
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Anyone ever port one of the aluminum manifolds then have it ceramic coated? Does wonders for reducing external header temps because it is such a good insulator, I would assume it would work to reduce intake air temps when the manifold temp is high.
I am also surprised there is no attempt on those 'high buck' aluminum manifolds to thermally isolate the runner and throttles from the cylinder heads.
BTW, one main advantage of magnesium is its higher specific heat. It will have a lower temperature rise for a given amount of heat input, compared to aluminum. As said, it is also a lousy conductor of heat compared to aluminum.
Jim
I am also surprised there is no attempt on those 'high buck' aluminum manifolds to thermally isolate the runner and throttles from the cylinder heads.
BTW, one main advantage of magnesium is its higher specific heat. It will have a lower temperature rise for a given amount of heat input, compared to aluminum. As said, it is also a lousy conductor of heat compared to aluminum.
Jim
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From: chicago burbs
Originally Posted by jclz28
Anyone ever port one of the aluminum manifolds then have it ceramic coated? Does wonders for reducing external header temps because it is such a good insulator, I would assume it would work to reduce intake air temps when the manifold temp is high.
I am also surprised there is no attempt on those 'high buck' aluminum manifolds to thermally isolate the runner and throttles from the cylinder heads.
BTW, one main advantage of magnesium is its higher specific heat. It will have a lower temperature rise for a given amount of heat input, compared to aluminum. As said, it is also a lousy conductor of heat compared to aluminum.
Jim
I am also surprised there is no attempt on those 'high buck' aluminum manifolds to thermally isolate the runner and throttles from the cylinder heads.
BTW, one main advantage of magnesium is its higher specific heat. It will have a lower temperature rise for a given amount of heat input, compared to aluminum. As said, it is also a lousy conductor of heat compared to aluminum.
Jim
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Joined: Mar 2004
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From: Fat Chance Hotel
I can't name 13 intakes including the BBK. 
If I count the LS7 and both combinations of LSX...
LS1, LS2, LS6, LS7(doesn't fit), LSX 78, LSX 90, Weiand, Holley, Truck intake, BBK, GM (carb), Edelbrock (carb)
I'm still short one...what else is there? Are the Holley and Weiand really the same intake?
If I count the LS7 and both combinations of LSX...
LS1, LS2, LS6, LS7(doesn't fit), LSX 78, LSX 90, Weiand, Holley, Truck intake, BBK, GM (carb), Edelbrock (carb)
I'm still short one...what else is there? Are the Holley and Weiand really the same intake?
