How is this for a street cam?
02-09-2007, 10:50 AM
#1
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How is this for a street cam? First off, I have a purpose for this cam. I want a very street friendly yet powerful cam. The car is a 99 SS, full weight, 3600 Vig, 3.73's, Fast 78,full bolt ons,stock shortblock, cleaned up #241's. Just got the cam specs back from cam doctoring. FOR ALL THE CAM GURU"S ....I need to know what other valve events are essential for you telling me how this cam is going to work.. I have the full CAM PRO PLUS Cam lift report.
INTAKE
.050 227.09\
Centerline 113.17 ATDC
peak cam lift- .34054
EX
.050 226.12
Centerline 113.17 BTDC
peak am lift- .34129
INTAKE
.050 227.09\
Centerline 113.17 ATDC
peak cam lift- .34054
EX
.050 226.12
Centerline 113.17 BTDC
peak am lift- .34129
02-09-2007, 12:37 PM
#2
Really need the advertised duration to suggest an intake centerline to install. Also, have your cleaned up 241's been milled? If so what cc? Any hard parts been replaced in your A4? They don't take to kindly to spinning the engine over 6000 or so.
The wide 113 LSA should give that cam a broad power range. Installing it straight up would give you an Intake valve closing point of 46 degrees, pushing the powerband up pretty high (6300+ peak). With a stock auto, I'd install it advanced 4 degrees to close the intake at 42 degrees and bring the powerband down some to peak about 6000. Then you could shift it at 6100 without missing much of the powerband, plus gain some valuable dynamic compression to improve you around town drivability when you aren't working the converter.
The wide 113 LSA should give that cam a broad power range. Installing it straight up would give you an Intake valve closing point of 46 degrees, pushing the powerband up pretty high (6300+ peak). With a stock auto, I'd install it advanced 4 degrees to close the intake at 42 degrees and bring the powerband down some to peak about 6000. Then you could shift it at 6100 without missing much of the powerband, plus gain some valuable dynamic compression to improve you around town drivability when you aren't working the converter.
02-09-2007, 01:21 PM
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Originally Posted by hammertime
Really need the advertised duration to suggest an intake centerline to install. Also, have your cleaned up 241's been milled? If so what cc? Any hard parts been replaced in your A4? They don't take to kindly to spinning the engine over 6000 or so.
The wide 113 LSA should give that cam a broad power range. Installing it straight up would give you an Intake valve closing point of 46 degrees, pushing the powerband up pretty high (6300+ peak). With a stock auto, I'd install it advanced 4 degrees to close the intake at 42 degrees and bring the powerband down some to peak about 6000. Then you could shift it at 6100 without missing much of the powerband, plus gain some valuable dynamic compression to improve you around town drivability when you aren't working the converter.
The wide 113 LSA should give that cam a broad power range. Installing it straight up would give you an Intake valve closing point of 46 degrees, pushing the powerband up pretty high (6300+ peak). With a stock auto, I'd install it advanced 4 degrees to close the intake at 42 degrees and bring the powerband down some to peak about 6000. Then you could shift it at 6100 without missing much of the powerband, plus gain some valuable dynamic compression to improve you around town drivability when you aren't working the converter.
02-09-2007, 01:23 PM
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Originally Posted by brady346
241's HAVE been milled .30 and have bigger valves, A4 is built, dont know specific head cc's. How do I figure advertised duration? I have a whole sheet of #'s here so is there any specifics that you need to be able to help me fully optimize this combination. I want every last bit of power. I will find out cc's.
02-09-2007, 03:37 PM
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Originally Posted by brad8266
advertised duration is your specs @ .006 lift
I dont know how to figure IVC.
Ok, so its street friendly.....what is the approx. powerband if installed straight up? How much power is it going to make at max? How will the cam feel throughout an rpm range of say 2000-6600? I assume it will have a medium yet noticeable idle.
02-09-2007, 04:20 PM
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Originally Posted by brady346
First off, I have a purpose for this cam. I want a very street friendly yet powerful cam. The car is a 99 SS, full weight, 3600 Vig, 3.73's, Fast 78,full bolt ons,stock shortblock, cleaned up #241's. Just got the cam specs back from cam doctoring. FOR ALL THE CAM GURU"S ....I need to know what other valve events are essential for you telling me how this cam is going to work.. I have the full CAM PRO PLUS Cam lift report.
INTAKE
.050 227.09\
Centerline 113.17 ATDC
peak cam lift- .34054
EX
.050 226.12
Centerline 113.17 BTDC
peak am lift- .34129
INTAKE
.050 227.09\
Centerline 113.17 ATDC
peak cam lift- .34054
EX
.050 226.12
Centerline 113.17 BTDC
peak am lift- .34129
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02-09-2007, 05:30 PM
#8
If your heads are milled .030, that should have removed about 5cc from them. Probably best to have the actual cc's though since the valve were upgraded.
I plugged in 272/272, 227/226, 113 LSA into the DCR calc, using 61cc heads and .040 head gaskets. Straight up, that setup yields a SCR of 11.48 and an excellent DCR of 8.81. It should be plenty snappy at low rpms, and really be 'on cam' by 2500 or so rpm. By the time you get to the stall converters peak, that setup could approach 350lb-ft at 3500rpm. The cam has but a 1/2 degree of overlap, so it should have just a noticeable idle, no chop to it.
I think you've got a great setup here.
I plugged in 272/272, 227/226, 113 LSA into the DCR calc, using 61cc heads and .040 head gaskets. Straight up, that setup yields a SCR of 11.48 and an excellent DCR of 8.81. It should be plenty snappy at low rpms, and really be 'on cam' by 2500 or so rpm. By the time you get to the stall converters peak, that setup could approach 350lb-ft at 3500rpm. The cam has but a 1/2 degree of overlap, so it should have just a noticeable idle, no chop to it.
I think you've got a great setup here.
