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Old 09-27-2004, 03:05 PM   #1
awesomeame
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ls6 vs ls1 cam specs...

anyone know them? i'm just thinking i might swap in an ls6 cam into my ls1...might be worth it?

--matt
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Old 09-27-2004, 04:33 PM   #2
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Cam Specs...

LS1/6 ('01)

Basic Construction
Machined from a steel billet, rifle-drilled for less mass and with a camshaft position reluctor just ahead of the rear journal.

The below spec's are not skewed to a specific rocker ratio.

LS6 Cam Profile
Valve lift .525-in.
Intake lift .525-in.
Intake duration @ .050-in. tappet lift 204°
Exhaust duration @ .050-in. tappet lift 211°
Lobe centers are 116° apart
Overlap at .050-in. tappet lift 0°
Overlap at .005 lift 45°
Overlap based on lift area: .52°

LS1 Cam Profile
Intake lifet .500
Exhaust lift .500
Intake duration @ .050-in. tappet lift 198°
Exhaust duration @ .050-in. tappet lift 208°
Lobe centers are 115° apart
Overlap at .050-in. tappet lift 0°
Overlap at .005 lift 49°
Overlap based on lift area: .42°

('97-'00 LS1: 0.472/0.479, 202/210 on 117.5)

The overlap numbers suggest the new cam is less aggressive, but:

The LS6 valve accelerations and open/close ramp configurations are dramatically different from those of the LS1. The negative acceleration over the nose increased about 10% (source of increased lift and duration). LS6's also have different ramps.

LS1's have constant velocity opening and closing ramps to limit valve train noise. LS6 ('01) is a more aggressive application, with a constant acceleration opening and closing which moves the valve faster to produce more lift area and allows tighter lobe centers (than with constant velocity ramps having the same lift). With this profile there is a slight increase in valve train noise.

If you opt for the LS6, you should change your valve springs as well.
LS6 springs are oval, wound more tightly and made from chrome/silicon/vanadium steel wire. Spring pressure:
On the Seat: 90lbs.
Over the Nose: 260lbs.

LS1 valve springs are round and made from chrome/silicon steel wire. Spring pressure:
On the Seat: 76lbs.
Over the Nose: 220lbs.

Ref.

C'ya
D
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Old 09-27-2004, 07:04 PM   #3
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Re: ls6 vs ls1 cam specs...

Quote:
Originally posted by awesomeame
anyone know them? i'm just thinking i might swap in an ls6 cam into my ls1...might be worth it?

--matt
Hey Matt,sounds like your going to do what i'm doing.
I'm installing an LS6 cam the last week of Nov.I'm also using the the pushrods and valvesprings(titanium),adding a double roller adjustable timing chain.I will install the cam at 4* advanced,you will need some kind of tunning to take advantage of the curve,and adjust the a/f ratio.I will also be installing a ZO6 intake and injectors and headers...Also keep in mind that you will be raising the RPMs in each gear,i'm setting my rev-limiter to 6500rpms,which also (in theory) will add a few miles per hour to my top speed.
I'm getting a great deal on super low milage parts from a car/person i trust.Lets hear what you decide.I'll be buying my parts in 2 maybe 3 weeks.If your going to wait until after Nov,i'll make a little story book for you of my install,let me know..


Great info as usual Dann.
The specs i saw for my 99 cam are smaller than the 2000 up c5 cam
My 99 cam specs are intake..469
................................exhaust 479
................................LSA..... ...117.5
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Old 09-27-2004, 09:07 PM   #4
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great info, thanks! i'll read more on that site to see if there are any differences between the ls6 cams through the years..

todd--i think i'm going to go this route, just 'cause it's relatively cheap to do, buying low mileage parts. great bang for the buck, and not sacrificing relability. this isn't a drag car afterall. i think for about $1000, i can get the cam/springs etc plus the intake/injectors, and make z06 power. is there anything else that needs to be done to get z06 power?

as for tuning, agostino racing engines is about an hour drive from my house, so no worries there and i'm in no rush to do this, winter here lasts until april, so i'll wait 'til you're done...getting a writeup would be great!

thanks guys!

--matt
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Old 09-27-2004, 09:23 PM   #5
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I think i'll still be a little short of ZO6 power due to the LS1 heads.But i have gutted cats,a halltech T-1 cold air intake,and will add headers,and a home ported and polished throttle body,and a good tune,so it could be very close if not right there.If i have time,i will do some minor pocket porting to my heads.
I agree about the bang for the buck,thats why i'm doing it.
Take a look at this site,you may already know about it ,this is where i got my t-body porting and cam change instruction,great write ups and pic.You can change the valve sprigs with the heads on the car,instructions in the cam swap write up.In two weeks,i'll will be doind hawaiian punches cam,then i can get myself ready for mine.I'll keep you informed as the time gets here...I wish it was tomorrow.
www.ls1howto.com
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Old 09-28-2004, 12:41 AM   #6
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First of all, if you use an 02-04 LS6 cam and don't use the LS6 lightweight valves, or heavier than LS6 springs, you may get valve float above 6200 rpm, and be unable to use the last 300 rpm or so of the LS6's power range. Just a thought.

Second, I have different specs for the LS1 cams. These are the numbers I have for y-body LS1s. (f-body had different cams until 2001.

year Lift i/e Dur i/e LSA PN
97-99 .472/.479 199/207 117 12554710 and
(PN change, same specs) 12560964
00 .500/.500 198/209 115.5 12560968
(specs listed in post above)
01-04 .467/.479 196/207 116 12561721

LS6
01 .525/.525 204/211 116 12560950
(specs listed in post above)
02-04 .555/.551 204/218 117.5 12565308

These are from "Chevy LS1/LS6 Performance" by Chris Enders.

Hope this helps
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Old 09-28-2004, 03:59 AM   #7
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Quote:
Originally posted by fdxpilot
First of all, if you use an 02-04 LS6 cam and don't use the LS6 lightweight valves, or heavier than LS6 springs, you may get valve float above 6200 rpm, and be unable to use the last 300 rpm or so of the LS6's power range. Just a thought.

Second, I have different specs for the LS1 cams. These are the numbers I have for y-body LS1s. (f-body had different cams until 2001.

year Lift i/e Dur i/e LSA PN
97-99 .472/.479 199/207 117 12554710 and
(PN change, same specs) 12560964
00 .500/.500 198/209 115.5 12560968
(specs listed in post above)
01-04 .467/.479 196/207 116 12561721

LS6
01 .525/.525 204/211 116 12560950
(specs listed in post above)
02-04 .555/.551 204/218 117.5 12565308

These are from "Chevy LS1/LS6 Performance" by Chris Enders.

Hope this helps
Funny you mention the valve float,i had thought of that,i'm going to shift at 6000 rpms and the tranny will actually/physically shift about 6200 rpms.I'm going to scan the car a few times the day after install,and i should be able to see from the readings if i got any float.If so i'll back off some so the tranny shifts by 6200 rpms.I will have to just play with it a little and see.

Good post on the cam specs,i was away from my books and just listed the 99 off the top off my head,thats why i only listed the intake (which was a little off),exhaust and LSA.Thanks for following that up..

I'll be using the valve train from a 2003 LS6 crate motor less than 10,000 miles,and installing 4* advanced.
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Old 10-01-2004, 12:28 PM   #8
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I'm just installing this weekend a LS6 cam kit and spec. are:
204/218 dur@0.050 0,050/0,050 lift 117,50 lobe separation.
Kit included:
New valve spring ,titanium retainers,Manley push rods 7.450,Rollmaster double roller timing plus all gasket and seals, new balancer bolt
I'll set the the RPM limit at 6200
I 'm also changing the manifold intake for the LS6
Other setup:
BBK shorty headers+Xpipe-Remus exhausts-BMC carbon air box intake-Hypertech PP3-Hypeterch Powerstat Thermostat 160°F-Z06 F&R swaybars-Z06schock absorbers-F&R Stoptech slotted rotors-Hawks HPS pads
Pirelli Pzero Giallo tyres(NRF)

I'll ceck the real HP increase,if any...
ciao
chevyc5ls1
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my vette c5 ls1 1999 coupé 6M
BMC Carbon Air Box+LS6 Manifold Intake+BBK Headers*X Pipe+Remus Exhaust+LS6/Z06 Camshaft kit(204-218 dur@0,50 0,500-0,500 117,50)+PP3 Hypertech+160°F Thermostat+Z06 schock absorbers+Z06 sway bars kit+Stoptech Brakes kit+Pirelli PZero Giallo Tyres
Old 10-01-2004, 12:55 PM   #9
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Sounds good,have you seen the Vinci (VHP) hand held programmer?Do a search,theres a thread on it here with a link to there site/programmer and it's functions.
It better than the predator,more adjustable.Thats what i'm getting to adjust my a/f ratio when i'm done installing just about everything you listed there..

Have fun,i wish i was doing mine this weekend..
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Old 10-01-2004, 01:51 PM   #10
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hawaii-5-lo
my vette is 6M and due to the fact ls6 cam is not harsh and modifications can be classified <soft>,I believe tuning should not be necessary (as said I'll revise RPM only) ....we'll see.
I have seen Vinci programmer but I have found more interesting the New Crane Power-Tuner :do You or somebody else know something more about it.
Once everythings installed I planned to dyno...peraphs I got only 5 hp
I'll revert the forum.
ciao
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BMC Carbon Air Box+LS6 Manifold Intake+BBK Headers*X Pipe+Remus Exhaust+LS6/Z06 Camshaft kit(204-218 dur@0,50 0,500-0,500 117,50)+PP3 Hypertech+160°F Thermostat+Z06 schock absorbers+Z06 sway bars kit+Stoptech Brakes kit+Pirelli PZero Giallo Tyres
Old 10-03-2004, 08:44 AM   #11
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cool, i can't wait to see the dyno results!!

--matt
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Old 10-03-2004, 11:48 AM   #12
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Quote:
Originally posted by chevyc5ls1
hawaii-5-lo
my vette is 6M and due to the fact ls6 cam is not harsh and modifications can be classified <soft>,I believe tuning should not be necessary (as said I'll revise RPM only) ....we'll see.
I have seen Vinci programmer but I have found more interesting the New Crane Power-Tuner :do You or somebody else know something more about it.
Once everythings installed I planned to dyno...peraphs I got only 5 hp
I'll revert the forum.
ciao
chevy5ls1
I sent an e-mail to VHP.After looking at the crane power tunner,it looks exactly like the the VHP power tunner(with a different sticker on the programer),and get this,the VHP is made by crane.
I disagree on the ls6 cam not needing tunning,even my car as it sits now needs tunning with the stock cam and no headers,i need more fuel in the higher rpms.I might add + 5% on mid range timing also.
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Old 10-04-2004, 02:28 PM   #13
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As usual, I have listen many different opinios and suggestions about...
I have still to install the manifold inatake Z06(Corvette Garage was just delaying a little the delivery but offered a great price!) and once everything shall be at their right place, at least it's what I hope ,a driving test in Monza Autodrome shall tell me straight what 's necessary...I'll revert to You with my impression:even if I'm not an official tester, I drove many differents sportive cars (Porsche 911 Carrera RS-Supra Biturbo 3000-BMWM3 3,2 ) both for autocrossing as well daily use and I got a quite good experience.
This is my first Corvette and ,after spending the first 3 years to build up confidence, I took the decision for this soft makeup:my purpose was to keep the Original Caracteristics but with slightly more...peper on it!!!
I believe what I did it should give even more driving pleasure wiyhou pain and stress....
Thanks for Your comments.
Ciao
paolo alia chevyc5ls1
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BMC Carbon Air Box+LS6 Manifold Intake+BBK Headers*X Pipe+Remus Exhaust+LS6/Z06 Camshaft kit(204-218 dur@0,50 0,500-0,500 117,50)+PP3 Hypertech+160°F Thermostat+Z06 schock absorbers+Z06 sway bars kit+Stoptech Brakes kit+Pirelli PZero Giallo Tyres
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