Here goes another “help me pick my cam” thread
07-31-2018, 06:59 PM
#1
Here goes another “help me pick my cam” thread
New setup will be:
-ly6 Thompson Motorsports shortblock with flat top pistons
-243 heads w/ TSP dual valve springs, ls3 rockers
-ls7 lifters
-7.4 pushrods
-GM mls Headgaskets
Compression should be between 10:6 to 11:1
The truck:
-2007 NNBS ccsb
-4l65e
-2600 stall
-3:73 gears
-285/70/17 tire’s
Current cam when the truck had a 5.3
Texas Speed spec’d Custom grind
216/226 .600/.600 114lsa
...was a DOG in the 5.3, and felt slower then stock even with the stall.
Hoping to find something off the shelf with lots of low end/mid range grunt.
All suggestions are welcome. Personal experience from those of you with heavy N/A trucks would be awesome.
Thanks fellas!
-ly6 Thompson Motorsports shortblock with flat top pistons
-243 heads w/ TSP dual valve springs, ls3 rockers
-ls7 lifters
-7.4 pushrods
-GM mls Headgaskets
Compression should be between 10:6 to 11:1
The truck:
-2007 NNBS ccsb
-4l65e
-2600 stall
-3:73 gears
-285/70/17 tire’s
Current cam when the truck had a 5.3
Texas Speed spec’d Custom grind
216/226 .600/.600 114lsa
...was a DOG in the 5.3, and felt slower then stock even with the stall.
Hoping to find something off the shelf with lots of low end/mid range grunt.
All suggestions are welcome. Personal experience from those of you with heavy N/A trucks would be awesome.
Thanks fellas!
07-31-2018, 07:12 PM
#2
That cam in the 6.0 should make plenty of low to mid grunt.
I would go with a CircleD 3200 278mm stall as well.
On the flip side, in my old 5.3 I ran the Comp LSR265 cam. That cam had all kinds of low end grunt.
Go ahead and scope out doing an 80e swap. You're going to need it eventually.
I would go with a CircleD 3200 278mm stall as well.
On the flip side, in my old 5.3 I ran the Comp LSR265 cam. That cam had all kinds of low end grunt.
Go ahead and scope out doing an 80e swap. You're going to need it eventually.
Trending Topics
08-02-2018, 01:51 PM
#8
Either a little smaller cam or a little more stall will give you the added low end.
The drop in truck cams are the best for low end power.
But that motor with that compression is gonna give you quite a boost in the low end compared to a 5.3, 9.5:1 motor. I'd run it with that cam, or do a drop in truck cam, they have a lot of advance in them and keep up the low end and even gain power over stock cams at 2500 rpm, most lose out till around 4k rpm then make more power than stock.
Also, if you aren't on 91 or 93 octane, step that up and turn up the timing, that'll help with the low end too.
If you want even more, call TSP and discuss advancing the cam a couple of degrees. It can help low end, but it can also hurt depending on valve events, so you need to talk to someone with very thorough knowledge of that cam and of valve events.
The drop in truck cams are the best for low end power.
But that motor with that compression is gonna give you quite a boost in the low end compared to a 5.3, 9.5:1 motor. I'd run it with that cam, or do a drop in truck cam, they have a lot of advance in them and keep up the low end and even gain power over stock cams at 2500 rpm, most lose out till around 4k rpm then make more power than stock.
Also, if you aren't on 91 or 93 octane, step that up and turn up the timing, that'll help with the low end too.
If you want even more, call TSP and discuss advancing the cam a couple of degrees. It can help low end, but it can also hurt depending on valve events, so you need to talk to someone with very thorough knowledge of that cam and of valve events.
08-02-2018, 07:21 PM
#9
Currently already on a 91 tune, and already have a 2600 stall.
Honestly you guys are giving me the easy way out..Lol
I think I’ll try and run what I already have and worst case, buy a larger 2800-3200
stall.
A good amount of research on PT was done before putting this together...and countless calls to a bunch of companies, (etc) which is why I ended up with this final product. The idea is to have a reliable, fun, well mannered engine that should go another 100k+ miles. If it gets boring, a LSA blower might solve that problem.
A nasty 408 stroker motor would’ve been in the.cards if this truck was weekend warrior, but it’s a work vehicle with over a quarter million miles already...
Thanks for all the input guys, I’ve found my answer.
Honestly you guys are giving me the easy way out..Lol
I think I’ll try and run what I already have and worst case, buy a larger 2800-3200
stall.
A good amount of research on PT was done before putting this together...and countless calls to a bunch of companies, (etc) which is why I ended up with this final product. The idea is to have a reliable, fun, well mannered engine that should go another 100k+ miles. If it gets boring, a LSA blower might solve that problem.
A nasty 408 stroker motor would’ve been in the.cards if this truck was weekend warrior, but it’s a work vehicle with over a quarter million miles already...
Thanks for all the input guys, I’ve found my answer.
08-02-2018, 09:26 PM
#10
My truck is a 5 speed but just throwing my two cents in as well.
I have a TMS 370 with flat tops and milled 243's sitting at around 11:1 comp and I'm running their 226/232 578/587 115lsa cam and I'm really happy with it. Plenty of low end and it has great street manners.
I have a TMS 370 with flat tops and milled 243's sitting at around 11:1 comp and I'm running their 226/232 578/587 115lsa cam and I'm really happy with it. Plenty of low end and it has great street manners.