Can't tell anything at highway speeds.
Pro's and con's of running COgs on the street
Here is a pic of my lt1 with cogs on the street. I have the ATI Big hub w/ dual keys. I am running it on the street. Its a YSI. I built or modified all the brackets if anyone needs some let me know.
Im running a cog setup also, I used colts brackets from above, but I had to modify the hell out of them to get it to actually work on the street. It involved having spacers machined to space the blower away from the factory brackets, as well as tapping the cast brackets deeper to run longer bolts as the blower wanted to rip them out. I also had to fab up a turnbuckle and weld it to the volute to keep it tensioned toward a header bolt to keep it from flexing forward...seems to be holding well though now.
Ive got about 300 miles on the setup now with no real problems. I think the 2 most important thing to running the cog setups is to have the Big block hub from ati so you dont split the thinner one at the keyway, as well as having plenty of bypass volume to keep the pressure out of the piping and resisting compresser surge. Ive got a single mondo currently and have been contemplating the addition of another or stepping up to a larger tial for safetys sake, although it seems to be doing ok right now as is.
I think people all want to say how cogs are so bad and whatnot, although nobody ran them themselves to compare. I really like mine and have had no issues.
Dont forget that cogs put less lateral stress on the crank because you dont have to tension them as much as a belt
Ive got about 300 miles on the setup now with no real problems. I think the 2 most important thing to running the cog setups is to have the Big block hub from ati so you dont split the thinner one at the keyway, as well as having plenty of bypass volume to keep the pressure out of the piping and resisting compresser surge. Ive got a single mondo currently and have been contemplating the addition of another or stepping up to a larger tial for safetys sake, although it seems to be doing ok right now as is.
I think people all want to say how cogs are so bad and whatnot, although nobody ran them themselves to compare. I really like mine and have had no issues.
Dont forget that cogs put less lateral stress on the crank because you dont have to tension them as much as a belt
Originally Posted by cjmatt
Dont forget that cogs put less lateral stress on the crank because you dont have to tension them as much as a belt
I'm running a cog setup on my car, but I only have about 500 miles on it right now.
Edit: The downside to running a cog on the street is belt life. The cog belts wear out/break/rip teeth off faster than what a serpentine belt would wear out.
Last edited by Ponyhntr; Aug 29, 2007 at 10:49 AM.
colts95ta - looks nicely set up.
For you and cjmatt - how's the noise compare to a ribbed? I have a sleeper (though it is still too loud an exhaust note) and do not want a 'gear drive' type whine from under the hood.
Thanks,
Jim
For you and cjmatt - how's the noise compare to a ribbed? I have a sleeper (though it is still too loud an exhaust note) and do not want a 'gear drive' type whine from under the hood.
Thanks,
Jim
Originally Posted by Ponyhntr
EXACTLY!! That's a common misconception that cog belts are harder on crankshafts than 12, 10, or even 8 rib belts. They are not, because with a serpentine setup you have to put much more tension on the belt than you do with a cog, like stated above.
I'm running a cog setup on my car, but I only have about 500 miles on it right now.
Edit: The downside to running a cog on the street is belt life. The cog belts wear out/break/rip teeth off faster than what a serpentine belt would wear out.
I'm running a cog setup on my car, but I only have about 500 miles on it right now.
Edit: The downside to running a cog on the street is belt life. The cog belts wear out/break/rip teeth off faster than what a serpentine belt would wear out.
anyway.... the big thing is belt life... the life changes wildly, but i dont know anyone running one that lasted over 3000miles without having rounded teeth.. most of the guys i know running them have roots blowers.. but the wear and concept is the same..
btw, price the belts first.. they SUUUUCK to buy. LOL.
Originally Posted by DeltaT
colts95ta - looks nicely set up.
For you and cjmatt - how's the noise compare to a ribbed? I have a sleeper (though it is still too loud an exhaust note) and do not want a 'gear drive' type whine from under the hood.
Thanks,
Jim
For you and cjmatt - how's the noise compare to a ribbed? I have a sleeper (though it is still too loud an exhaust note) and do not want a 'gear drive' type whine from under the hood.
Thanks,
Jim
Originally Posted by MrDude_1
they are harder on the crank snout... not from lateral stress, but because the cogs are so welll connected, when you have some sudden jolt (say, a boost spike from the throttle snapping shut) the belt has no slip or give to it.. it transfers that force right to the crank hub... thats why cogs break crank hubs in cars that never have a problem with surp setups.
anyway.... the big thing is belt life... the life changes wildly, but i dont know anyone running one that lasted over 3000miles without having rounded teeth.. most of the guys i know running them have roots blowers.. but the wear and concept is the same..
btw, price the belts first.. they SUUUUCK to buy. LOL.
anyway.... the big thing is belt life... the life changes wildly, but i dont know anyone running one that lasted over 3000miles without having rounded teeth.. most of the guys i know running them have roots blowers.. but the wear and concept is the same..
btw, price the belts first.. they SUUUUCK to buy. LOL.
One thing I dont understand is how people get such short life out of the belts though. Plenty of cars come with timing belts which go 50k miles before there even supposed to be changed, why wouldnt they last as long on a supercharger?
And as far as price goes, youve just got to look around, Ive found some pretty good prices online, 30 bucks a belt....which is fine for me even if i have to change it every other oil change. Nobody said itd be cheap to drive 7-800hp cars on the street
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Originally Posted by MrDude_1
they are harder on the crank snout... not from lateral stress, but because the cogs are so welll connected, when you have some sudden jolt (say, a boost spike from the throttle snapping shut) the belt has no slip or give to it.. it transfers that force right to the crank hub... thats why cogs break crank hubs in cars that never have a problem with surp setups.
anyway.... the big thing is belt life... the life changes wildly, but i dont know anyone running one that lasted over 3000miles without having rounded teeth.. most of the guys i know running them have roots blowers.. but the wear and concept is the same..
anyway.... the big thing is belt life... the life changes wildly, but i dont know anyone running one that lasted over 3000miles without having rounded teeth.. most of the guys i know running them have roots blowers.. but the wear and concept is the same..
Originally Posted by cjmatt
Im running a cog setup also, I used colts brackets from above, but I had to modify the hell out of them to get it to actually work on the street. It involved having spacers machined to space the blower away from the factory brackets, as well as tapping the cast brackets deeper to run longer bolts as the blower wanted to rip them out. I also had to fab up a turnbuckle and weld it to the volute to keep it tensioned toward a header bolt to keep it from flexing forward...seems to be holding well though now.
Ive got about 300 miles on the setup now with no real problems. I think the 2 most important thing to running the cog setups is to have the Big block hub from ati so you dont split the thinner one at the keyway, as well as having plenty of bypass volume to keep the pressure out of the piping and resisting compresser surge. Ive got a single mondo currently and have been contemplating the addition of another or stepping up to a larger tial for safetys sake, although it seems to be doing ok right now as is.
I think people all want to say how cogs are so bad and whatnot, although nobody ran them themselves to compare. I really like mine and have had no issues.
Dont forget that cogs put less lateral stress on the crank because you dont have to tension them as much as a belt
Ive got about 300 miles on the setup now with no real problems. I think the 2 most important thing to running the cog setups is to have the Big block hub from ati so you dont split the thinner one at the keyway, as well as having plenty of bypass volume to keep the pressure out of the piping and resisting compresser surge. Ive got a single mondo currently and have been contemplating the addition of another or stepping up to a larger tial for safetys sake, although it seems to be doing ok right now as is.
I think people all want to say how cogs are so bad and whatnot, although nobody ran them themselves to compare. I really like mine and have had no issues.
Dont forget that cogs put less lateral stress on the crank because you dont have to tension them as much as a belt
Originally Posted by xXxSilveradoxXx
Ive got a cog belt running my dry sump oil pump, will I have these problems or are these only supercharger drive problems?
