Can you IMAGINE what this cam would idle like ???
07-29-2004, 04:24 AM
#1
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Can you IMAGINE what this cam would idle like ???
Here's a custom grind for ya.......how about a 209º/237º .530/.530 113.5 lsa +4º 
....how's that for a HUGE exhaust duration !!!!
This thing (supposedly) will make 394hp @ 5500rpm and 452ft/lbs Tq @ 3500rpm on a stock-head 6.0 !!!!
I don't want to reveal where I got these specs from (but they ARE legit) because the shop I'm dealing with has some pretty hush-hush stuff under development...I CAN tell you that those numbers ARE computer-generated (which is why I am curious as to how it would idle) but should yield VERY similar results once the prototype cam is ground. I was kinda concerned about the whole "computer-generated numbers" thing so I spoke at length with them about the software they were using (I was figuring Dyno2000 or something along those lines) but they assured me that they were using the same type of software that Comp and Crane use to develop thier cams
They tell me this cam will be VERY driveable on the street and pretty much has a FLAT torque curve from idle to 4000rpm (450ft/lbs at IDLE!!!...how's that for a towing cam !!!!)
I tried these specs in Dyno3000 and came up with numbers pretty close to what they said (had to use an LS1 head-flow file so it's not perfect).....if this is true this will be one hell of a cam for us overweight ECSB guys !!!!!
I'll keep y'all posted
....how's that for a HUGE exhaust duration !!!! This thing (supposedly) will make 394hp @ 5500rpm and 452ft/lbs Tq @ 3500rpm on a stock-head 6.0 !!!!
I don't want to reveal where I got these specs from (but they ARE legit) because the shop I'm dealing with has some pretty hush-hush stuff under development...I CAN tell you that those numbers ARE computer-generated (which is why I am curious as to how it would idle) but should yield VERY similar results once the prototype cam is ground. I was kinda concerned about the whole "computer-generated numbers" thing so I spoke at length with them about the software they were using (I was figuring Dyno2000 or something along those lines) but they assured me that they were using the same type of software that Comp and Crane use to develop thier cams
They tell me this cam will be VERY driveable on the street and pretty much has a FLAT torque curve from idle to 4000rpm (450ft/lbs at IDLE!!!...how's that for a towing cam !!!!)
I tried these specs in Dyno3000 and came up with numbers pretty close to what they said (had to use an LS1 head-flow file so it's not perfect).....if this is true this will be one hell of a cam for us overweight ECSB guys !!!!!
I'll keep y'all posted
07-29-2004, 05:24 AM
#2
so a stock lq4 has what 315 ponies? so they are saying that that cam is going to make what--nearly 80 ponies???????? i think that is going to be a bit much. even if you start with 325--70?? man i want to see that on a dyno. if it does ill buy one today. good luck. 
07-29-2004, 07:58 AM
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The Hotcam has a large(r) split, and the owners of those things love the flat torque curve they put out. I guess it makes sense that this would put some torque down too... but 450ft/lbs @ 3,500? Wow.
I wonder what makes the exahaust duration such a big torque-maker.
I wonder what makes the exahaust duration such a big torque-maker.
07-29-2004, 08:28 AM
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Originally Posted by 02denali
so a stock lq4 has what 315 ponies? so they are saying that that cam is going to make what--nearly 80 ponies???????? i think that is going to be a bit much. even if you start with 325--70?? man i want to see that on a dyno. if it does ill buy one today. good luck.
07-29-2004, 11:59 AM
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Originally Posted by gonzo 6.0
how about a 209º/237º .530/.530 113.5 lsa +4º ....how's
Since you like a big split.
Why not something closer to 214/224 .550 113.5
The extra lift is free HP
Since you like a big split.
Why not something closer to 214/224 .550 113.5
The extra lift is free HP
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07-29-2004, 12:41 PM
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How well do you think a cam like that would work in a 5.3?
I'm sorta new to the get torque not HP thing. (And yes... I want torque on my truck for towing, etc...)
I'm sorta new to the get torque not HP thing. (And yes... I want torque on my truck for towing, etc...)
07-29-2004, 12:48 PM
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i bet that would be a messed up looking power band for that cam, but i dont know. not really sure how exhaust duration leads to more tq. i can see where you go less on the intake which keeps the power band down, but still. why would more tq be gained from the exhaust valve being held open longer...
heres some notes i took a while back, maybe it'll help out some:
heres some notes i took a while back, maybe it'll help out some:
Increasing intake duration will move your powerband up also. It also will hurt midrange torque most of the time. Bigger is NOT better, and alot of people make that mistake. Increasing duration makes the idle rougher also.
Increasing exhaust duration is intended to extend the HP curve a little further on the high rpm. Not always the case. It is meant to help support a restrictive (stock manifolds and cats) exhaust setup. If you have headers, you will most likely see no gains by having more exhaust duration than intake duration. This is known as a "split duration" cam and those tend to idle worse than single pattern cams and cause more misfire SES codes. "single pattern" means cams with the same intake and exhaust duration.
Increasing lift moves the entire power curve upwards if all else is kept equal. More lift means those valves open up further. Has no effect on drivability, but more lift does wear out your valvetrain faster.
Increasing exhaust duration is intended to extend the HP curve a little further on the high rpm. Not always the case. It is meant to help support a restrictive (stock manifolds and cats) exhaust setup. If you have headers, you will most likely see no gains by having more exhaust duration than intake duration. This is known as a "split duration" cam and those tend to idle worse than single pattern cams and cause more misfire SES codes. "single pattern" means cams with the same intake and exhaust duration.
Increasing lift moves the entire power curve upwards if all else is kept equal. More lift means those valves open up further. Has no effect on drivability, but more lift does wear out your valvetrain faster.