Big Cam guys, loss of low end...
#21
TECH Senior Member
iTrader: (21)
For all of those unbelievers show me a dyno graph that shows less low-end power than the stock cam. Someone once said that to me and I spent at least 1/2 an hour looking and never found a graph that had less low-end than stock. So until someone shows me a graph I'll believe it. If I am wrong I will gladly admit it, however, I just couldn't find one myself.
#22
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: Riverside, CA
Posts: 554
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 777
You have the same or more power down low as stock, it's just that above 3,000 you are pulling 50-100 more hp
#23
TECH Resident
Join Date: Nov 2001
Location: Barbaria
Posts: 943
Likes: 0
Received 0 Likes
on
0 Posts
I don't get why this is such a big deal to some of you. Match the torque convertor to the cam in an auto, match the gear to the cam in a manual...and you'll never have a problem. It's only a factor if you pick some ungodly huge cam and run 2.73s or a stock convertor.
My convertor flashes to around 4400 or so so I could care less if I lose 20 lb ft of torque below 3k.
My convertor flashes to around 4400 or so so I could care less if I lose 20 lb ft of torque below 3k.
#24
Launching!
Thread Starter
Join Date: Sep 2005
Location: Arlington, VA
Posts: 263
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by JimTA
I don't get why this is such a big deal to some of you. Match the torque convertor to the cam in an auto, match the gear to the cam in a manual...and you'll never have a problem. It's only a factor if you pick some ungodly huge cam and run 2.73s or a stock convertor.
My convertor flashes to around 4400 or so so I could care less if I lose 20 lb ft of torque below 3k.
My convertor flashes to around 4400 or so so I could care less if I lose 20 lb ft of torque below 3k.
#25
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: Riverside, CA
Posts: 554
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by JimTA
I don't get why this is such a big deal to some of you.
I agree that there wont be any loss at the strip, but it really makes the car less fun to drive during normal driving.
#26
11 Second Club
iTrader: (2)
Join Date: Mar 2002
Location: Hawaii
Posts: 618
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 777
For all of those unbelievers show me a dyno graph that shows less low-end power than the stock cam. Someone once said that to me and I spent at least 1/2 an hour looking and never found a graph that had less low-end than stock. So until someone shows me a graph I'll believe it. If I am wrong I will gladly admit it, however, I just couldn't find one myself.
WS6Kids dyno graph is an excellent example of what a large cam does to an engine's powerband.
#27
TECH Resident
Join Date: Nov 2001
Location: Barbaria
Posts: 943
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by WS6 Kid
Its a big deal to me because those are the rpms i'm at almost 100% of the time while driving around in the city, on errands etc.
I agree that there wont be any loss at the strip, but it really makes the car less fun to drive during normal driving.
I agree that there wont be any loss at the strip, but it really makes the car less fun to drive during normal driving.
If you regret the cam that much, just go to a smaller one.
#28
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: Riverside, CA
Posts: 554
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by JimTA
So gear it, go to a 3.73 or a 4.10. But then your problem will be that your 60fts suck and you'll need a slick...and then you'll be breaking rearends and need a 12bolt or a 9 inch. And before you know it, you're complaining that your racecar only gets 10mpg and you can't hear the radio over the exhuast. There's always a trade off with these cars, you can't have everything. It all comes down to how fast you want to go, and what you're willing to live with during everyday driving.
If you regret the cam that much, just go to a smaller one.
If you regret the cam that much, just go to a smaller one.
I think i'll try to quit once i finish the susp and get a 9in....maybe
#29
TECH Senior Member
iTrader: (21)
Well turns out that I am wrong. I wish I could've found that back when I was trying to argue this the other way to people. I guess I have gotten my facts straight now. I wouldn't have said it this way in the first place if I couldn't find proof of it. I didn't believe it that you didn't lose low-end, I just couldn't find proof of it so I had to agree.
PS: not trying to get out of being wrong, I know I was.
PS: not trying to get out of being wrong, I know I was.
#30
12 Second Club
iTrader: (1)
Join Date: May 2005
Location: Bradenton, FL
Posts: 684
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by JimTA
So gear it, go to a 3.73 or a 4.10. But then your problem will be that your 60fts suck and you'll need a slick...and then you'll be breaking rearends and need a 12bolt or a 9 inch. And before you know it, you're complaining that your racecar only gets 10mpg and you can't hear the radio over the exhuast. There's always a trade off with these cars, you can't have everything. It all comes down to how fast you want to go, and what you're willing to live with during everyday driving.
If you regret the cam that much, just go to a smaller one.
If you regret the cam that much, just go to a smaller one.
Everything has tradeoffs. If mods didn't, everyone would get the same mods.
Typically, the more speed you want, the less "smooth" your ride is.
Aftermarket mods tend to be "raw" but get the job done.
#31
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: Riverside, CA
Posts: 554
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 777
Well turns out that I am wrong. I wish I could've found that back when I was trying to argue this the other way to people. I guess I have gotten my facts straight now. I wouldn't have said it this way in the first place if I couldn't find proof of it. I didn't believe it that you didn't lose low-end, I just couldn't find proof of it so I had to agree.
PS: not trying to get out of being wrong, I know I was.
PS: not trying to get out of being wrong, I know I was.
#32
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: Riverside, CA
Posts: 554
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by silverTA2002
Very well said.
Everything has tradeoffs. If mods didn't, everyone would get the same mods.
Typically, the more speed you want, the less "smooth" your ride is.
Aftermarket mods tend to be "raw" but get the job done.
Everything has tradeoffs. If mods didn't, everyone would get the same mods.
Typically, the more speed you want, the less "smooth" your ride is.
Aftermarket mods tend to be "raw" but get the job done.
#34
TECH Junkie
iTrader: (13)
Join Date: Sep 2004
Location: Fort Myers, FL.
Posts: 3,857
Likes: 0
Received 0 Likes
on
0 Posts
this is why I love this website, people can argue something and not become into a pissing contest. I wish other web sites were like this.
I also have a good sized cam and went with 3.73's in the rear and am having no loss of power down low. I just went back to look at them to make sure.
I also have a good sized cam and went with 3.73's in the rear and am having no loss of power down low. I just went back to look at them to make sure.
#35
TECH Fanatic
Join Date: Jan 2003
Location: Northern Va
Posts: 1,094
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by black01_WS6
this is why I love this website, people can argue something and not become into a pissing contest...
#36
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: Riverside, CA
Posts: 554
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by black01_WS6
this is why I love this website, people can argue something and not become into a pissing contest. I wish other web sites were like this.
I also have a good sized cam and went with 3.73's in the rear and am having no loss of power down low. I just went back to look at them to make sure.
I also have a good sized cam and went with 3.73's in the rear and am having no loss of power down low. I just went back to look at them to make sure.
I'd think about the biggest cam you can go with without losing anything anywhere in the RPM band would be like a 224-226 duration.
#38
TECH Junkie
iTrader: (13)
Join Date: Sep 2004
Location: Fort Myers, FL.
Posts: 3,857
Likes: 0
Received 0 Likes
on
0 Posts
I am running a 232-234 595. 598. 112. they dyno was on a mustang dyno. does anyone have a dyno sheet of a stock ls1. because my other one to go from is from bolt ons. my car seems stock until about 2500 rpm's then its a whole different story. I may have lost some down low but the dyno doesn't show below 2800rpm's, but i can't tell a difference.
#39
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: Riverside, CA
Posts: 554
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by black01_WS6
I am running a 232-234 595. 598. 112. they dyno was on a mustang dyno. does anyone have a dyno sheet of a stock ls1. because my other one to go from is from bolt ons. my car seems stock until about 2500 rpm's then its a whole different story. I may have lost some down low but the dyno doesn't show below 2800rpm's, but i can't tell a difference.
#40
TECH Senior Member
Join Date: Apr 2004
Location: Texas
Posts: 6,157
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by nuzee
That would be a more believable statement if you said:
"I had a trex and I gained everywhere lower, mid, upper part of my dyno curve which started at 3000 rpm. "
It would really go against conventional wisdom if you truely meant the lower, middle and upper parts of the entire rpm range.
"I had a trex and I gained everywhere lower, mid, upper part of my dyno curve which started at 3000 rpm. "
It would really go against conventional wisdom if you truely meant the lower, middle and upper parts of the entire rpm range.
I think its pretty obvious that I would gain 3k+ with the trex over the stock cam. My point is my car felt stronger even in the lower RPMs over the stock cam so I did not lose anything as the title of this thread suggests. Of course we have no way of measuring this but I drove that car every day.