i bought a crate motor - cam experts (Patrick G) come in
06-21-2009, 11:59 AM
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i bought a crate motor - cam experts (Patrick G) come in 402 CI aluminum LS2 block with a forged 4.00" Callies crank and Forged Manley H-Beam rods/pistons. aluminum AFR 225 cc BIG bore heads that have 2.08 intake and 1.60 exhaust valves. the heads are aluminum 225 cc AFR's with 2.08 intake valves and 1.60 exhaust valves. they flow 320 cfm @ .600' lift on the intake and 250 cfm @ .600 lift on the exhaust. the compression ratio is 11.1:1
the cam is a comp cams hydraulic roller with .596 lift and a 114 LSA.
the duration on the intake is 250* @ .050 and the exhaust is 246* @ .050
so can anybody tell me what rpm this cam will make peak power at? i am guessing 7,000 rpm's......
this motor is gonna be going into my '01 camaro SS. i am gonna run a 92mm fast intake and throttle body with 1-7/8" Hooker headers and no exhaust with just the straight 3" collectors. i also want to spray a 150-200 direct port shot of nitrous.
the motor has enough Piston to Valve clearance to handle a .625 lift cam. the valve springs look weak to me though and so i am concerned about valve float. i don't want to spin this motor more than 7,000 rpms as i will be using the stock 1.7 ratio roller rockers and titanium retainers. the "beehive" valve springs are rated at the following:
Max. Valve Lift O.D. I.D. Installed Pressure Open Pressure Coil Bind
.600" 1.290" .885" 130@1.800" 333@1.150" 1.085"
if this cam makes peak Horsepower in excess of 7,000 rpm's i think i should swap this cam out for a comp cam with XE-R lobes that will make peak Horsepower at 7,000 rpm's or less and swap the springs out for some comp 921's.
Patrick G what do you think?
the cam is a comp cams hydraulic roller with .596 lift and a 114 LSA.
the duration on the intake is 250* @ .050 and the exhaust is 246* @ .050
so can anybody tell me what rpm this cam will make peak power at? i am guessing 7,000 rpm's......
this motor is gonna be going into my '01 camaro SS. i am gonna run a 92mm fast intake and throttle body with 1-7/8" Hooker headers and no exhaust with just the straight 3" collectors. i also want to spray a 150-200 direct port shot of nitrous.
the motor has enough Piston to Valve clearance to handle a .625 lift cam. the valve springs look weak to me though and so i am concerned about valve float. i don't want to spin this motor more than 7,000 rpms as i will be using the stock 1.7 ratio roller rockers and titanium retainers. the "beehive" valve springs are rated at the following:
Max. Valve Lift O.D. I.D. Installed Pressure Open Pressure Coil Bind
.600" 1.290" .885" 130@1.800" 333@1.150" 1.085"
if this cam makes peak Horsepower in excess of 7,000 rpm's i think i should swap this cam out for a comp cam with XE-R lobes that will make peak Horsepower at 7,000 rpm's or less and swap the springs out for some comp 921's.
Patrick G what do you think?
Last edited by FAST FREDDY; 06-21-2009 at 12:59 PM.
06-21-2009, 02:00 PM
#3
402 CI aluminum LS2 block with a forged 4.00" Callies crank and Forged Manley H-Beam rods/pistons. aluminum AFR 225 cc BIG bore heads that have 2.08 intake and 1.60 exhaust valves. the heads are aluminum 225 cc AFR's with 2.08 intake valves and 1.60 exhaust valves. they flow 320 cfm @ .600' lift on the intake and 250 cfm @ .600 lift on the exhaust. the compression ratio is 11.1:1
the cam is a comp cams hydraulic roller with .596 lift and a 114 LSA.
the duration on the intake is 250* @ .050 and the exhaust is 246* @ .050
so can anybody tell me what rpm this cam will make peak power at? i am guessing 7,000 rpm's......
this motor is gonna be going into my '01 camaro SS. i am gonna run a 92mm fast intake and throttle body with 1-7/8" Hooker headers and no exhaust with just the straight 3" collectors. i also want to spray a 150-200 direct port shot of nitrous.
the motor has enough Piston to Valve clearance to handle a .625 lift cam. the valve springs look weak to me though and so i am concerned about valve float. i don't want to spin this motor more than 7,000 rpms as i will be using the stock 1.7 ratio roller rockers and titanium retainers. the "beehive" valve springs are rated at the following:
Max. Valve Lift O.D. I.D. Installed Pressure Open Pressure Coil Bind
.600" 1.290" .885" 130@1.800" 333@1.150" 1.085"
if this cam makes peak Horsepower in excess of 7,000 rpm's i think i should swap this cam out for a comp cam with XE-R lobes that will make peak Horsepower at 7,000 rpm's or less and swap the springs out for some comp 921's.
Patrick G what do you think?
the cam is a comp cams hydraulic roller with .596 lift and a 114 LSA.
the duration on the intake is 250* @ .050 and the exhaust is 246* @ .050
so can anybody tell me what rpm this cam will make peak power at? i am guessing 7,000 rpm's......
this motor is gonna be going into my '01 camaro SS. i am gonna run a 92mm fast intake and throttle body with 1-7/8" Hooker headers and no exhaust with just the straight 3" collectors. i also want to spray a 150-200 direct port shot of nitrous.
the motor has enough Piston to Valve clearance to handle a .625 lift cam. the valve springs look weak to me though and so i am concerned about valve float. i don't want to spin this motor more than 7,000 rpms as i will be using the stock 1.7 ratio roller rockers and titanium retainers. the "beehive" valve springs are rated at the following:
Max. Valve Lift O.D. I.D. Installed Pressure Open Pressure Coil Bind
.600" 1.290" .885" 130@1.800" 333@1.150" 1.085"
if this cam makes peak Horsepower in excess of 7,000 rpm's i think i should swap this cam out for a comp cam with XE-R lobes that will make peak Horsepower at 7,000 rpm's or less and swap the springs out for some comp 921's.
Patrick G what do you think?
You did not mention if your cam has any advance to it. Without the known ICL, it's hard to tell exactly what your rpm peak will be but I can tell you this...the cross sectional area and runner length of the FAST 92 intake will have much more to do with where your motor makes peak power than the cam will. By design, the FAST intake will want a power peak of 6300 rpm and a torque peak of 4800 rpm.
Assuming a 4 degree advance to your cam, you will have a 55 degree ABDC at .050" intake valve closing point and 20 degrees of overlap. This late IVC will want to cheat your power peak to more like 6700 rpm, but your short exhaust valve duration and modest overlap may not allow you to do it.
I question the design of the cam for a 200 shot. Sure it will work, but it won't be ideal.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
06-21-2009, 02:27 PM
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First off, I hope you are running the optional AFR hollow stem intake valves with those beehive springs. 1.290" beehives will rpm much better if your valvetrain is the lighter stuff.
You did not mention if your cam has any advance to it. Without the known ICL, it's hard to tell exactly what your rpm peak will be but I can tell you this...the cross sectional area and runner length of the FAST 92 intake will have much more to do with where your motor makes peak power than the cam will. By design, the FAST intake will want a power peak of 6300 rpm and a torque peak of 4800 rpm.
Assuming a 4 degree advance to your cam, you will have a 55 degree ABDC at .050" intake valve closing point and 20 degrees of overlap. This late IVC will want to cheat your power peak to more like 6700 rpm, but your short exhaust valve duration and modest overlap may not allow you to do it.
I question the design of the cam for a 200 shot. Sure it will work, but it won't be ideal.
You did not mention if your cam has any advance to it. Without the known ICL, it's hard to tell exactly what your rpm peak will be but I can tell you this...the cross sectional area and runner length of the FAST 92 intake will have much more to do with where your motor makes peak power than the cam will. By design, the FAST intake will want a power peak of 6300 rpm and a torque peak of 4800 rpm.
Assuming a 4 degree advance to your cam, you will have a 55 degree ABDC at .050" intake valve closing point and 20 degrees of overlap. This late IVC will want to cheat your power peak to more like 6700 rpm, but your short exhaust valve duration and modest overlap may not allow you to do it.
I question the design of the cam for a 200 shot. Sure it will work, but it won't be ideal.
Patrick here is a link to the cam info you requested > http://www.slponline.com/view_product.asp?P=51015
i take it from your post here that there is no way that this cam will make peak Horsepower in excess of 7,000 rpm's then? if i am understanding your post correctly you think it might peak at 6,700 rpm's? i do not want to run this cam if it makes peak horsepower in excess of 7,000 rpm's. that is my primary consideration. it doesn't matter so much to me if the cam peaks at 6,300 rpm's versus 6,700 rpm's.
Last edited by FAST FREDDY; 06-21-2009 at 11:31 PM.
