new cam help
11-14-2011, 11:30 AM
#1
new cam help So when I first put together my setup I picked a cam based on budget. it worked for the time being but I'm not that happy with it. I would really like to get another cam with the same basic specs but with a better power band. Reason for staying with the same basic specs is because my heads are milled. Any input would be appreciated.
Current setup:
LS6 Intake
Texas Speed PRC Stage 1 LS6 heads w/ PRC dual springs .650 lift milled to 61cc
Patriot 7.4 hardened push rods
Patriot Performance 225/229 .580/.590 114+4 LSA Cam
LS2 Timing Chain
Ported, Polished and bump stop modded stock throttle body
SLP Lid
ARH 1x7/8" LT's
ARH 3" ORY
TSP Rumbler Catback
Current setup:
LS6 Intake
Texas Speed PRC Stage 1 LS6 heads w/ PRC dual springs .650 lift milled to 61cc
Patriot 7.4 hardened push rods
Patriot Performance 225/229 .580/.590 114+4 LSA Cam
LS2 Timing Chain
Ported, Polished and bump stop modded stock throttle body
SLP Lid
ARH 1x7/8" LT's
ARH 3" ORY
TSP Rumbler Catback
11-14-2011, 03:57 PM
#3
So when I first put together my setup I picked a cam based on budget. it worked for the time being but I'm not that happy with it. I would really like to get another cam with the same basic specs but with a better power band. Reason for staying with the same basic specs is because my heads are milled. Any input would be appreciated.
Current setup:
LS6 Intake
Texas Speed PRC Stage 1 LS6 heads w/ PRC dual springs .650 lift milled to 61cc
Patriot 7.4 hardened push rods
Patriot Performance 225/229 .580/.590 114+4 LSA Cam
LS2 Timing Chain
Ported, Polished and bump stop modded stock throttle body
SLP Lid
ARH 1x7/8" LT's
ARH 3" ORY
TSP Rumbler Catback
Current setup:
LS6 Intake
Texas Speed PRC Stage 1 LS6 heads w/ PRC dual springs .650 lift milled to 61cc
Patriot 7.4 hardened push rods
Patriot Performance 225/229 .580/.590 114+4 LSA Cam
LS2 Timing Chain
Ported, Polished and bump stop modded stock throttle body
SLP Lid
ARH 1x7/8" LT's
ARH 3" ORY
TSP Rumbler Catback
Lower, higher, wider, narrower....?
11-14-2011, 07:05 PM
#6
Thanks Aaron. I would call but I feel like it would be wasting your time as I don't have the cash to spend as of yet (holidays etc). I'm trying to see what I will need to save for. I know I will need new push rods and possibly new valve springs. I was also thinking of changing out my lifters for LS7 lifters.
11-14-2011, 07:15 PM
#7
Not an expert but I am wondering how bad it is dying after 6200RPM?
With a 225* @ .050" duration, 114LSA and 110ICL (+4) the IVC should be 42.5* ABDC and by the comments I have seen from the gurus you would think power peak would be pretty close to 6200RPM (maybe a tad earlier... depends on other things too of course).
Do you have a picture of the dyno? What's the status of your fuel system?
If I am missing something maybe someone can fill me in.
With a 225* @ .050" duration, 114LSA and 110ICL (+4) the IVC should be 42.5* ABDC and by the comments I have seen from the gurus you would think power peak would be pretty close to 6200RPM (maybe a tad earlier... depends on other things too of course).
Do you have a picture of the dyno? What's the status of your fuel system?
If I am missing something maybe someone can fill me in.
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11-14-2011, 07:20 PM
#8
Not an expert but I am wondering how bad it is dying after 6200RPM?
With a 225* @ .050" duration, 114LSA and 110ICL (+4) the IVC should be 42.5* ABDC and by the comments I have seen from the gurus you would think power peak would be pretty close to 6200RPM (maybe a tad earlier... depends on other things too of course).
Do you have a picture of the dyno? What's the status of your fuel system?
If I am missing something maybe someone can fill me in.
With a 225* @ .050" duration, 114LSA and 110ICL (+4) the IVC should be 42.5* ABDC and by the comments I have seen from the gurus you would think power peak would be pretty close to 6200RPM (maybe a tad earlier... depends on other things too of course).
Do you have a picture of the dyno? What's the status of your fuel system?
If I am missing something maybe someone can fill me in.
I've read that Patriot Peformance cams have "lazy" lobes. I could have misread though.
I'm running 42lb injectors with everything else stock. I will be upgrading the pump soon since I know that is one downfall to my fuel system.
11-14-2011, 08:21 PM
#14
But as a thought experiment, pretend you had a 224/228 with Comp XER lobes, which would make the lift .581/.588 also on a 114 +4. Not an unusual cam at all. That shouldn't hit a wall at 6200RPM... the few dynos of cams sort of like that (from a rapid search) all would easily pull to 6500RPM.
I suppose I just don't get why yours would hit a wall like that. I realize the .050 numbers don't tell the whole story, but there is an entire generation of cams that are similar to what you run that should pull past 6200RPM. It seems like it should be more or less right in the range you want already. That is unless something other than the cam is contributing, or it is advanced.
Just an amateur's take on it though.
edit: here is a graph of a car with your cam
https://ls1tech.com/forums/dynamomet...tang-dyno.html
here's another one
https://ls1tech.com/forums/dynamomet...99-z28-m6.html
Last edited by HAZ-Matt; 11-14-2011 at 08:29 PM.
11-14-2011, 09:14 PM
#16
Sure. I have no idea what lobes they use. From the specs you are providing they don't have crazy lift... I could understand that reducing absolute power potential I suppose.
But as a thought experiment, pretend you had a 224/228 with Comp XER lobes, which would make the lift .581/.588 also on a 114 +4. Not an unusual cam at all. That shouldn't hit a wall at 6200RPM... the few dynos of cams sort of like that (from a rapid search) all would easily pull to 6500RPM.
I suppose I just don't get why yours would hit a wall like that. I realize the .050 numbers don't tell the whole story, but there is an entire generation of cams that are similar to what you run that should pull past 6200RPM. It seems like it should be more or less right in the range you want already. That is unless something other than the cam is contributing, or it is advanced.
Just an amateur's take on it though.
edit: here is a graph of a car with your cam
[imghttp://home.comcast.net/~sentinel00/dynotunegraph.jpg[/img]
https://ls1tech.com/forums/dynamomet...tang-dyno.html
here's another one
[imghttp://img149.imageshack.us/img149/1058/dyno.jpg[/img]
https://ls1tech.com/forums/dynamomet...99-z28-m6.html
But as a thought experiment, pretend you had a 224/228 with Comp XER lobes, which would make the lift .581/.588 also on a 114 +4. Not an unusual cam at all. That shouldn't hit a wall at 6200RPM... the few dynos of cams sort of like that (from a rapid search) all would easily pull to 6500RPM.
I suppose I just don't get why yours would hit a wall like that. I realize the .050 numbers don't tell the whole story, but there is an entire generation of cams that are similar to what you run that should pull past 6200RPM. It seems like it should be more or less right in the range you want already. That is unless something other than the cam is contributing, or it is advanced.
Just an amateur's take on it though.
edit: here is a graph of a car with your cam
[imghttp://home.comcast.net/~sentinel00/dynotunegraph.jpg[/img]
https://ls1tech.com/forums/dynamomet...tang-dyno.html
here's another one
[imghttp://img149.imageshack.us/img149/1058/dyno.jpg[/img]
https://ls1tech.com/forums/dynamomet...99-z28-m6.html
(412/390 run)
Uploaded with ImageShack.us
Not sure on the A/F. I bought the heads assembled from TSP so I'm sure they were set properly.
11-14-2011, 09:25 PM
#17
It's hard to know for sure, but extrapolating I would figure it would gently curve down towards 6500RPM so that you could effectively use a 6400-6500RPM shift point to maximize average power. The green and red lines both basically stop at "indicated" power peak, which was 6100RPM more or less. Hard to say though, especially if it never really got tuned or logged up there.
Reminds me of when my car was dynoed after the 243's and LS6 cam was put on and they cut off the dyno at 6000RPM... which shouldn't have been to peak power yet.
Do you have any data logs up there?
Reminds me of when my car was dynoed after the 243's and LS6 cam was put on and they cut off the dyno at 6000RPM... which shouldn't have been to peak power yet.
Do you have any data logs up there?
