cam lsa
Dec 28, 2008 | 02:52 PM
#41
Joined: Apr 2004
Posts: 16,820
Likes: 2
From: In a van DOWN BY THE RIVER
Sorry, I have to correct you, 114 is not overlap, but is rather the "LSA" or the angle between the peaks (centerlines) of the Exhaust and Intake cam lobes. Overlap is measured on a graph when you take the lift values of a cam lobe and plot them over degrees of rotation. When overlap in a cam exists you will see the exhaust lobe in the act of closing (but not closed all the way) and the intake lobe will start opening. The degrees of overlap are measured when this condition exists (when the intake lobe opens before the exhaust lobe is closed) from the point at which the intake lobe opens to when the exhaust lobe finally closes. LSA is just the angle between the centerlines of the two camshaft lobes.
Not disputing that the cam will work for F.I. for clarification, as I have not personally tested that cam nor have I seen it's geometry.
Not disputing that the cam will work for F.I. for clarification, as I have not personally tested that cam nor have I seen it's geometry.
Jan 5, 2009 | 03:08 AM
#43
How can we deal with this? I sitll confuse about overlap. I dont know which one SIMPLE for me to run. No matter what which one can work on N/A and turbo. I still want to atick with 212/218 but I still struggles with LSA. Texasmotorsport offer me the torquer v.2 Camshaft but didnt tell me a lsa. http://www.texas-speed.com/shop/item...d=174&catid=49
2600 stall umm How about 3000 or 3200 If I go with 4l80E tranny? Trailblazer coverter you mean Trailblazer SS?
2600 stall umm How about 3000 or 3200 If I go with 4l80E tranny? Trailblazer coverter you mean Trailblazer SS?
Copied and pasted from there Site...
Texas Speed Torquer v.2 Camshaft
TSP XS Series Camshaft: Torquer 2 232/234, .595"/.598" Camshaft With Your Choice of Lobe Seperation
You get to chose which LSA you want....
Jan 5, 2009 | 03:51 AM
#44
Texas Speed 224/224 XE Camshaft
Item#:
25-224XE
TSP Custom 224/224, .566"/.566" Camshaft With Your Choice of Lobe Seperation
If your set on something larger then the 212/218, This would probally be a better choice for you for a DD combo and for later adding a Turbo.... Stay with a 114LSA. The 5.3L heads will reach there Peak flow around .550 lift any way
At a certin point you hit point were you will stop gaining any thing.... You will actually start to lose power on the bottom end.... remember A truck intake and the stock truck heads will stop flowing at a certin point. I highely recomend you purchase the following Book,
"DYNO-PROVEN GM LS1 THRU LS7 PERFORMANCE PARTS"
If you look on page 77 you will see what I mean About the point of demenishing returns.
They test a XR265HR Vs. XR281HR on AN LS6 Crate engine...
.212/.218 .525/.529 114LSA Vs. .228/.230 .571/.573 112LSA
The smaller cam made more useable tourqe up to 5300 RPM By as much as 20 FTLB more.
Same thing if you look at the HP out put. The smaller cam stays slightly above the Larger one untill around 4700 rpm...
On a daily driver, How much time do you actually spend up past say 3000 rpm??? maybe 5% of your actuall driving... same thing when your towing were you actually need that extra power down low...
Item#:
25-224XE
TSP Custom 224/224, .566"/.566" Camshaft With Your Choice of Lobe Seperation
If your set on something larger then the 212/218, This would probally be a better choice for you for a DD combo and for later adding a Turbo.... Stay with a 114LSA. The 5.3L heads will reach there Peak flow around .550 lift any way
At a certin point you hit point were you will stop gaining any thing.... You will actually start to lose power on the bottom end.... remember A truck intake and the stock truck heads will stop flowing at a certin point. I highely recomend you purchase the following Book,
"DYNO-PROVEN GM LS1 THRU LS7 PERFORMANCE PARTS"
If you look on page 77 you will see what I mean About the point of demenishing returns.
They test a XR265HR Vs. XR281HR on AN LS6 Crate engine...
.212/.218 .525/.529 114LSA Vs. .228/.230 .571/.573 112LSA
The smaller cam made more useable tourqe up to 5300 RPM By as much as 20 FTLB more.
Same thing if you look at the HP out put. The smaller cam stays slightly above the Larger one untill around 4700 rpm...
On a daily driver, How much time do you actually spend up past say 3000 rpm??? maybe 5% of your actuall driving... same thing when your towing were you actually need that extra power down low...
Last edited by 1FastBrick; Jan 5, 2009 at 04:02 AM.
Thread
Thread Starter
Forum
Replies
Last Post
lawhitediamante
INTERNAL ENGINE MODIFICATIONS
5
Aug 12, 2015 12:14 PM
