guys with LE heads come in
#3
LS1TECH Sponsor
iTrader: (7)
Join Date: Oct 2002
Location: Texas
Posts: 414
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
It will keep pulling another 400-500 RPM over what it does with stock heads. You do not "have to" raise the shift RPM but the car will be faster if you do. Just shift at 6300 RPM or so and the bottom end will live a while.
Lloyd
Lloyd
#5
LS1TECH Sponsor
iTrader: (7)
Join Date: Oct 2002
Location: Texas
Posts: 414
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
if it is a 6 speed, you might shift at 6400-6500 RPM and still be OK, just do not go beyond that with a stock bottom end.
If it is auto trans and you have the computer set to shift at 6300 RPM (and completing the shift at 6500-6600 RPM) that is all I would wanna take the engine.
If it is a built 355, you can shift at 6500 RPM with no worries and a larger cam would be agood idea. If it is a stock bottom end, that is actually a good cam to make the bottom end live.
You would not ahve to raise the shift points and if shifting that high on a stock bottom end, just leave the shift points there and the car will still run ALOT better than it does with stock heads.
Lloyd
If it is auto trans and you have the computer set to shift at 6300 RPM (and completing the shift at 6500-6600 RPM) that is all I would wanna take the engine.
If it is a built 355, you can shift at 6500 RPM with no worries and a larger cam would be agood idea. If it is a stock bottom end, that is actually a good cam to make the bottom end live.
You would not ahve to raise the shift points and if shifting that high on a stock bottom end, just leave the shift points there and the car will still run ALOT better than it does with stock heads.
Lloyd
Trending Topics
#8
TECH Veteran
iTrader: (246)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Yes a LE1 cam will suffice with a LE2 heads and make damn good power. You will just have to tell ur tuner who already knows to up the shift +/- 600 rpm which will be around 6400 rpm and will be awesome for your build. But if your bottom end is built push it further than that.
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
#9
TECH Veteran
iTrader: (12)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Yes a LE1 cam will suffice with a LE2 heads and make damn good power. You will just have to tell ur tuner who already knows to up the shift +/- 600 rpm which will be around 6400 rpm and will be awesome for your build. But if your bottom end is built push it further than that. ![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
#12
Restricted User
Thread Starter
iTrader: (2)
Join Date: Feb 2009
Posts: 707
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
my goal for the car is to be in the high 11's with a stock bottom end and on street trim. so now im thinking i might just put some 1.7 rockers that ive got laying around on and up the lift to .570/.580 and see if that will open them heads up a little more. also the car weighs about 3600 pounds with me in it.
#16
Restricted User
Thread Starter
iTrader: (2)
Join Date: Feb 2009
Posts: 707
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
i wouldnt think i would have a piston to valve clearance with the cc503 would i? ive seen cams with alot more duration and more lift than that. so should i stick with 1.6s or go ahead and go with 1.7s?