Max effort LS7 Cam suggestions needed
05-11-2013, 12:22 PM
#21
Still wondering how people hit 600rw cam only on those. An intake, header, LS7 makes 475-490rwhp on my dyno. Most cam cars are 525-555rw depending on cam size.
QM600 makes 555-560rwhp but a huge dip in the low rpm area, nice pull 5000+.
Must have a crappy dyno.
QM600 makes 555-560rwhp but a huge dip in the low rpm area, nice pull 5000+.
Must have a crappy dyno.
05-13-2013, 03:46 PM
#22
We pulled the Black Widow out of my buddies car and installed something a little more aggressive. He reset the C6 Z06 H/C record yesterday running 9.86 @ 140.8 at 2000 ft D/A and he was .04 off his best 60'. With better air and a better 60' he's hoping for 9.70's. Cam was in the 24X/26X range.
05-14-2013, 09:40 AM
#26
LS1Tech Sponsor
We have the same results. Add heads/ decked and they will make 600 rwhp but to be honestly I would rather choose the cams that make 530-540 rwhp. They are a lot more fun and don't give up that freight train torque down low that a LS7 has.
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05-16-2013, 01:37 PM
#28
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I would like to suggest that before you talk to a camshaft manufacturer or a speed shop you go to the Wallace Racing website and run their Intake Port Mach Index Calculator. - http://www.wallaceracing.com/machcalc.php
Input your piston diameter, intake valve diameter, peak engine rpms, crankshaft stroke, and a valve lift number into the Intake Port Mach Index calculator. Keep adjusting the valve lift number until you achieve a Intake Port Mach number of .50.
Take that lift number and ask your camshaft supplier to build you a cam with that lift thru the LS7's 1.8:1 rocker arms.
In addition, if you really want the best package and you are not concerned with street usage, have the engine built with .927" solid roller lifters, instead of the .842" hydraulic roller lifters that come stock with the LS7. Isky's lifter bushings - KLV-937 and solid roller lifters - 937K150EZMAX. Your springs should come from CV Products and they are made by PSI - #PSICT1572ML-TC.
Good luck with your decision.
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Input your piston diameter, intake valve diameter, peak engine rpms, crankshaft stroke, and a valve lift number into the Intake Port Mach Index calculator. Keep adjusting the valve lift number until you achieve a Intake Port Mach number of .50.
Take that lift number and ask your camshaft supplier to build you a cam with that lift thru the LS7's 1.8:1 rocker arms.
In addition, if you really want the best package and you are not concerned with street usage, have the engine built with .927" solid roller lifters, instead of the .842" hydraulic roller lifters that come stock with the LS7. Isky's lifter bushings - KLV-937 and solid roller lifters - 937K150EZMAX. Your springs should come from CV Products and they are made by PSI - #PSICT1572ML-TC.
Good luck with your decision.
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Last edited by Pumba; 05-16-2013 at 01:46 PM.
05-16-2013, 01:51 PM
#29
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Brain,
I am not trying to pick a fight.
I am trying to understand what the DIN correction method is? Also, does DIN use the same barometric, humidity, and temperature correction factors as SAE J1995? SAE J1995 has been used by the OEM automotive manufacturers since 1990 for measuring GROSS ENGINE POWER.
Thanks.
05-16-2013, 03:45 PM
#30
He's in Europe, and they may use DIN as their normal correction.
I think it's all relative, the car gained 160 rwhp with a cam, headers and a Fast 102, which seems like a pretty good gain to me. Especially considering in back to back testing we didn't find any peak HP gains with the Fast 102, only average power gains.
05-28-2013, 06:57 PM
#31
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Cam only 600rwhp!!
The meanest ls7 cam I have seen and tried without touching the heads was the Striker
It was a bad a.. Cam and it made 572rwhp with full bolt on's and fast intake
I wonder how do people hit 600rwhp without touching the heads?
I want such a cam
The meanest ls7 cam I have seen and tried without touching the heads was the Striker
It was a bad a.. Cam and it made 572rwhp with full bolt on's and fast intake
I wonder how do people hit 600rwhp without touching the heads?
I want such a cam
05-28-2013, 08:34 PM
#34
05-28-2013, 08:54 PM
#35
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I have tried a lot if huge cams and ended up disappointed due to the weak power under the curve
Am waiting for your cams Martin ;-)
05-29-2013, 05:29 PM
#36
Patience grasshopper, patience. 
I've compared the valve events from the Striker cam to our new LS7 Saturday Night Special Stage 3 TorqueMAX cam and the LS7 SNS Stage 3 should create more torque under the curve due to it's earlier closing intake valve event.
We shall see soon!
We shall see soon!
05-30-2013, 12:42 PM
#40
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I ordered Mast 305 LS7 heads will this cam work will with those heads or you suggest special cam ?