LS7 cam in LS3... - LS1TECH

Log In 


Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9
Sponsored by:
Sponsored by:

LS7 cam in LS3...

Reply
 
Thread Tools Search this Thread
Old 11-23-2009, 12:49 AM   #1
TECH Fanatic
Thread Starter
iTrader: (13)
 
Join Date: Feb 2005
Location: Houston, TX
Posts: 1,725
Default LS7 cam in LS3...

Anyone done this? Any EDUCATED guesses as to what it would make?
jmilz28 is offline   Reply With Quote
Old 11-23-2009, 05:33 AM   #2
Launching!
iTrader: (2)
 
Join Date: Jul 2006
Posts: 267
Default

Keep in mind that the rocker ratio on the LS7 is 1.8 compared to 1.7 on the LS3. So the LS7 lift of 0.593 would be reduced to 0.560 when installed in the LS3. Still higher than 0.551 with the stock LS3 cam though.
Hans Grüber is offline   Reply With Quote
Old 11-23-2009, 11:31 AM   #3
TECH Fanatic
Thread Starter
iTrader: (13)
 
Join Date: Feb 2005
Location: Houston, TX
Posts: 1,725
Default

Thanks, Hans. I'm with and ahead of you on that. This also requires a longer pushrod due to the smaller base circle of the ls7 cam. My thinking is this will give a small boost in torque, moderate bump in hp, slight lope, with no downside at all. I suppose we'll see when this gets done.
jmilz28 is offline   Reply With Quote
Old 11-23-2009, 12:39 PM   #4
TECH Regular
 
sssalah's Avatar
 
Join Date: Feb 2003
Location: Bahrain
Posts: 441
Default

Quote:
Originally Posted by jmilz28 View Post
Thanks, Hans. I'm with and ahead of you on that. This also requires a longer pushrod due to the smaller base circle of the ls7 cam. My thinking is this will give a small boost in torque, moderate bump in hp, slight lope, with no downside at all. I suppose we'll see when this gets done.
I've that cam installed in my L76, as I needed a 3 bolt cam with a stock idle and it was free. Didn't know about the difference in the base circle, that could eapleain the valvetrain noise I have.
sssalah is offline   Reply With Quote
Old 11-23-2009, 01:38 PM   #5
TECH Fanatic
Thread Starter
iTrader: (13)
 
Join Date: Feb 2005
Location: Houston, TX
Posts: 1,725
Default

Quote:
Originally Posted by sssalah View Post
I've that cam installed in my L76, as I needed a 3 bolt cam with a stock idle and it was free. Didn't know about the difference in the base circle, that could eapleain the valvetrain noise I have.
Nossir, it DOES explain your valvetrain noise.
How's it run otherwise? Any time slips or dyno sheets?
jmilz28 is offline   Reply With Quote
Old 11-23-2009, 02:38 PM   #6
TECH Resident
 
Join Date: Apr 2008
Location: Right here, right now!
Posts: 773
Default

GM uses a very similar, maybe almost the same cam in the LSA &/or the LS9, so it certainly fits those platforms well.
rsz288 is offline   Reply With Quote
Old 11-23-2009, 03:32 PM   #7
Launching!
iTrader: (2)
 
Join Date: Jul 2006
Posts: 267
Default

Quote:
Originally Posted by jmilz28 View Post
Thanks, Hans. I'm with and ahead of you on that. This also requires a longer pushrod due to the smaller base circle of the ls7 cam. My thinking is this will give a small boost in torque, moderate bump in hp, slight lope, with no downside at all. I suppose we'll see when this gets done.
Do you know what the base circle difference is?

I was actually thinking of picking up a cheap LS7 cam for my 6.2 engine build.

Then I saw that people were demanding a premium for them simply due to the fact that it was a "corvette 7.0 LS7 cam." It really made more sense to just spend $150 extra and get an aftermarket cam.

If you really need to run custom pushrods, then it really might not be worth it.

What kind of engine did you want to run it in?
Hans Grüber is offline   Reply With Quote
Old 11-23-2009, 04:17 PM   #8
TECH Fanatic
iTrader: (10)
 
eseibel67's Avatar
 
Join Date: Feb 2008
Location: Kitchener, ON
Posts: 1,743
Default

Hans: How did you get the umlaut over the "u"? I love it.

OP:Sorry for the hijack.
eseibel67 is offline   Reply With Quote
Old 11-24-2009, 12:00 AM   #9
Launching!
iTrader: (2)
 
Join Date: Jul 2006
Posts: 267
Default

Quote:
Originally Posted by eseibel67 View Post
Hans: How did you get the umlaut over the "u"? I love it.

OP:Sorry for the hijack.
Start > Programs > Accessories > System Tools > Character Map

You'll find tons of characters from virtually any language.
Hans Grüber is offline   Reply With Quote
Old 11-24-2009, 10:23 AM   #10
TECH Regular
 
sssalah's Avatar
 
Join Date: Feb 2003
Location: Bahrain
Posts: 441
Default

Quote:
Originally Posted by jmilz28 View Post
Nossir, it DOES explain your valvetrain noise.
How's it run otherwise? Any time slips or dyno sheets?
No results yet, have to deal with other issues like tuning, fabing up a lid convrsion and now this pushrod length
sssalah is offline   Reply With Quote
Old 11-27-2009, 09:44 AM   #11
Teching In
iTrader: (1)
 
VERTC6's Avatar
 
Join Date: Jun 2007
Posts: 42
Default

For a blower car I think the LS7 is a great cam for a sleeper but for an NA car you need a little more duration, I would look at the new TR cam Cheatr V.3 219/229 .607 .604 117LSA. Will still run like stock and tons of tq with the higher lift. LS3 heads love lift.
VERTC6 is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
ls swap ltxraw Texas Members 1 12-18-2013 09:25 PM
Crankshaft LS1/LS6/lS2 jtsrace Parts Wanted 7 09-12-2013 05:45 PM
ls3 cam in an ls1 george g Generation III Internal Engine 11 09-19-2010 05:15 PM
ls7 intake on ls3 heads??? Tzion_ben_Arthur Generation IV Internal Engine 4 01-02-2010 04:23 AM
ls2 vs ls7??? madslow Generation IV Internal Engine 10 04-14-2005 10:36 AM


Tags
back, bolt, cam, camshaft, heads, installed, lift, ls2, ls3, ls7, map, noise, swap, train, valve

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 03:42 AM.