turbo cam ??'s
06-11-2005, 10:33 PM
#1
turbo cam ??'s
go here http://www.thunderracing.com/catalog...&vid=9&pcid=51 scroll down a little bit until u find the 99-CHEATR-CAM this seems like it might be a good turbo cam with the wide lsa and all. any thought on this it might be a little big for a 4.8 but i think with the wide lsa (117) it would be ok
thanks for any opinions.
thanks for any opinions.
06-11-2005, 10:45 PM
#2
after i bought my tr224... i was looking at this one. I think its a great idea... hell, if i can get the tr224 to act right in my 4.8.. you should have no prob with that one... only prob with that (if you care i mean).. is that it doesnt lope like a reg cam should.. its almost a stock like idle... thats good too actually.. sneak up on people better like that, lol.
06-12-2005, 07:44 AM
#5
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That camshaft was designed with stock exhaust manifolds and a stock exhaust system in mind. It was designed for Patrick G's AFR headed/stock exhaust setup. Lets just say, if this is a good Turbo camshaft, TR doesn't know what the hell they are doing. 
.... Not the case
Turbocharged motors should be limited in exhaust duration.
.... Not the caseTurbocharged motors should be limited in exhaust duration.
06-12-2005, 08:24 AM
#6
That looks like a supercharger cam to me.
Turbos want a reverse split (or single pattern) -- I experimented with both a 230/236 and a 236/230. The reverse is smoother and stronger.
The rule of thumb on the lsa is easy: average the durations and divide by 2 for the target lsa (narrowest).
For example if you had a 224/220:
444/2 /2 = 222 / 2 = 111 lsa
There are a couple of cams on TR that would work well for a turbo:
99-227/224-114 - best choice IMO
99-220/220-112
99-224/224-112
99-224/224-114
Note: I meant best turbo cams -- I somehow missed the part about this going in a 4.8
Turbos want a reverse split (or single pattern) -- I experimented with both a 230/236 and a 236/230. The reverse is smoother and stronger.
The rule of thumb on the lsa is easy: average the durations and divide by 2 for the target lsa (narrowest).
For example if you had a 224/220:
444/2 /2 = 222 / 2 = 111 lsa
There are a couple of cams on TR that would work well for a turbo:
99-227/224-114 - best choice IMO
99-220/220-112
99-224/224-112
99-224/224-114
Note: I meant best turbo cams -- I somehow missed the part about this going in a 4.8
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06-12-2005, 10:08 AM
#8
Not a bad time for a cammed x-cab.
Turbo is right, that cam is more or less for stock exhaust and manifolds. I forgot about that... I would say thats a "bolt on Cam"... If you have basic bolt ons and maybe, maybe a s/c than it would be a good cam. But you just have to decide whether or not you want to pay that much for something that your not tottaly sure about. Look on the fastest truck list and see what the turbo guys are running for cams and PM them and ask them.
Turbo is right, that cam is more or less for stock exhaust and manifolds. I forgot about that... I would say thats a "bolt on Cam"... If you have basic bolt ons and maybe, maybe a s/c than it would be a good cam. But you just have to decide whether or not you want to pay that much for something that your not tottaly sure about. Look on the fastest truck list and see what the turbo guys are running for cams and PM them and ask them.
06-12-2005, 04:13 PM
#9
Originally Posted by TurboBerserker
That looks like a supercharger cam to me.
Turbos want a reverse split (or single pattern) -- I experimented with both a 230/236 and a 236/230. The reverse is smoother and stronger.
The rule of thumb on the lsa is easy: average the durations and divide by 2 for the target lsa (narrowest).
For example if you had a 224/220:
444/2 /2 = 222 / 2 = 111 lsa
There are a couple of cams on TR that would work well for a turbo:
99-227/224-114 - best choice IMO
99-220/220-112
99-224/224-112
99-224/224-114
Turbos want a reverse split (or single pattern) -- I experimented with both a 230/236 and a 236/230. The reverse is smoother and stronger.
The rule of thumb on the lsa is easy: average the durations and divide by 2 for the target lsa (narrowest).
For example if you had a 224/220:
444/2 /2 = 222 / 2 = 111 lsa
There are a couple of cams on TR that would work well for a turbo:
99-227/224-114 - best choice IMO
99-220/220-112
99-224/224-112
99-224/224-114
so does it matter to have a tight lsa like a 112-114 or is it better to have more like a 115-117 or so.
in other words can you have a nice lobey sound and be a good turbo cam??
06-12-2005, 04:29 PM
#10
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Originally Posted by 4.8T
in other words can you have a nice lobey sound and be a good turbo cam??
Not really.
Turbo cams generally have zero overlap or very little anyway. A lot of the lope that you hear on big N/A cams is the tons of overlap they tend to have. When you start lowering the LSA below 114 you really start to "hear" the cam at idle but it's the wrong direction to go for a turbo cam. Another misconception is that turbos need large duration cams. You really don't need a huge cam. There are plenty of HIGH HP LS1s running cams in the 216 to 220 range. bigger cubes obviously require a bigger cam though. On my grey truck we are going to try to use the 226/220-.591-116 cam we had in the Z71 and see what it does with the bigger cubes and lighter weight.