There are much better cams out there that still drive like stock but make great power.
LS6 Cam/LS6 Intake Question?
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LS6 Cam/LS6 Intake Question?
I have a 2000 LSI with stock ported TB. I want to install an LS6 Cam and LS6 intake that I already have. I will be doing a new LS6 oil pump also. Do I need to change the injectors and fuel rails? I can get 28.8's with fuel rails off a Caddy CTS-V. Do I need different push rods or springs?
PM'S please.
PM'S please.
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Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
TR 224
/thread
Don't bother with the injectors unless the 28.8's are REALLY cheap. Keep your stock fuel rails. Yes you ABSOLUTELY MUST change your springs, and I would highly advise changing the pushrods too. Do you have an A4 or M6?
/thread
Don't bother with the injectors unless the 28.8's are REALLY cheap. Keep your stock fuel rails. Yes you ABSOLUTELY MUST change your springs, and I would highly advise changing the pushrods too. Do you have an A4 or M6?
Le Mans Master
Joined: Aug 2001
Posts: 8,145
Likes: 1
From: Bradenton FLORIDA
Give JP a call: 813-628-0080 & he can go over all the pro's & con's and recomend the best cam grind for your A4 as well as when you need different springs, etc. You are very close so a short drive to the shop for a tour & to talk to the techs in person is also advised. 
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Michael S. PalmerGuest
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Give JP a call: 813-628-0080 & he can go over all the pro's & con's and recomend the best cam grind for your A4 as well as when you need different springs, etc. You are very close so a short drive to the shop for a tour & to talk to the techs in person is also advised.
Burning Brakes
Joined: Oct 2004
Posts: 931
Likes: 35
From: Rowlett, Texas
The 2000 has the smaller injectors; but most of the guys indicate they are fine below about 400 RWHP. So should be no problem if you only plan on a cam and intake.
The problem with the LS6 cam is that it will not provide much more torque below 4000-4500 than your current cam, it's gains are mostly top-end. A nice little Comp cam can easily add 20-25 ft-lb down where you can really feel it on the street. $300 well spent in my opinion. You can use the LS6 springs as long as you don't get too big a cam, 0.560 or so, and don't set the rev limiter too high. Lingenfelter uses them for their 0.580 cam.
DG
The problem with the LS6 cam is that it will not provide much more torque below 4000-4500 than your current cam, it's gains are mostly top-end. A nice little Comp cam can easily add 20-25 ft-lb down where you can really feel it on the street. $300 well spent in my opinion. You can use the LS6 springs as long as you don't get too big a cam, 0.560 or so, and don't set the rev limiter too high. Lingenfelter uses them for their 0.580 cam.
DG
Le Mans Master
Joined: Aug 2001
Posts: 8,145
Likes: 1
From: Bradenton FLORIDA
The 2000 has the smaller injectors; but most of the guys indicate they are fine below about 400 RWHP. So should be no problem if you only plan on a cam and intake.
The problem with the LS6 cam is that it will not provide much more torque below 4000-4500 than your current cam, it's gains are mostly top-end. A nice little Comp cam can easily add 20-25 ft-lb down where you can really feel it on the street. $300 well spent in my opinion. You can use the LS6 springs as long as you don't get too big a cam, 0.560 or so, and don't set the rev limiter too high. Lingenfelter uses them for their 0.580 cam.
DG
The problem with the LS6 cam is that it will not provide much more torque below 4000-4500 than your current cam, it's gains are mostly top-end. A nice little Comp cam can easily add 20-25 ft-lb down where you can really feel it on the street. $300 well spent in my opinion. You can use the LS6 springs as long as you don't get too big a cam, 0.560 or so, and don't set the rev limiter too high. Lingenfelter uses them for their 0.580 cam.
DG
Melting Slicks
Joined: Aug 2006
Posts: 2,167
Likes: 11
From: Powell TN
Cruise-In VIII Veteran
When I had the stock injectors (26.2#) and making 340 rwhp, my injector duty cycle was 85-87%. "They" say it's not supposed to be over 80%. I changed injectors to 28.8# when I put an LS6 intake on. I added about 12-15 hp and injector duty cycle is now 72% with the 28.8s.
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
Send them to Harland Sharp and they will install bearing retainers, theyre great. There is NO possible way for the HS modded rockers to puke bearings.
Burning Brakes
Joined: Oct 2004
Posts: 931
Likes: 35
From: Rowlett, Texas
2000C5, I certainly can't really argue with that logic. It would seem that no more than 80% injector DC would be good.
I certainly don't want to give bad advice.
I was quoting a few of the guys here who used the smaller injectors with modded motors and saw no problem; claiming the injectors could actually go to 100% for short periods with no issues.
Also, when I had my car tuned at a very respected Dallas shop, he made the comment that my 365RWHP was no problem with the small injectors "They are okay up to around 400" he said.
I've had no problems for the last two years, but now you've got me thinking......
Cheers,
DG
I certainly don't want to give bad advice.
I was quoting a few of the guys here who used the smaller injectors with modded motors and saw no problem; claiming the injectors could actually go to 100% for short periods with no issues.
Also, when I had my car tuned at a very respected Dallas shop, he made the comment that my 365RWHP was no problem with the small injectors "They are okay up to around 400" he said.
I've had no problems for the last two years, but now you've got me thinking......
Cheers,
DG
Le Mans Master
Joined: Aug 2001
Posts: 8,145
Likes: 1
From: Bradenton FLORIDA
Team Owner
Joined: Mar 2001
Posts: 25,889
Likes: 7
From: Virginia Beach
CI 3-5-6-7-8 Veteran
If you're doing all that work don't waste your time w/ an LS6 cam... it won't be that different, esp w/o the heads.
You figure a bolt on lS1 makes 330-340 rwhp and a bolton LS6 makes 380-390 rwhp. But that's w/ the LS6 heads too. So just the cam and manifold won't get you much at all.
As said, there are many great cams out there that will give you stock drivability w/ a nice power increase. Something like a 224/228 cam would be great.
Yes, the oem rockers have been know to puke their needle bearings. When I put my cam in I had 70k on mine so I chose to get the new Yella Terra Ultralights, however, another great option is to send your stockers out to Harland sharp and have them modified w/ new trunions. It makes them far more stout and no worry of needle bearings ever again. I went w/ the YTs because they were on sale for < $400 at the time whe nthe HS modified stockers are $250ish.
HTH!
~Brian
You figure a bolt on lS1 makes 330-340 rwhp and a bolton LS6 makes 380-390 rwhp. But that's w/ the LS6 heads too. So just the cam and manifold won't get you much at all.
As said, there are many great cams out there that will give you stock drivability w/ a nice power increase. Something like a 224/228 cam would be great.
Yes, the oem rockers have been know to puke their needle bearings. When I put my cam in I had 70k on mine so I chose to get the new Yella Terra Ultralights, however, another great option is to send your stockers out to Harland sharp and have them modified w/ new trunions. It makes them far more stout and no worry of needle bearings ever again. I went w/ the YTs because they were on sale for < $400 at the time whe nthe HS modified stockers are $250ish.
HTH!
~Brian