GMP LS-9 CnC Ported Heads

ProPower engines · Post by **ProPower engines** » Fri Feb 21, 2020 4:10 pm

Hey guys
Does anyone have any info on the GMP LS9 CNC ported heads?

Looking for some basic flow numbers to get on with cam choice.
This is a 4" stroker deal with a 4.030 bore.

Any info will be greatly appreciated

Dave

Charliesauto · Post by **Charliesauto** » Fri Feb 21, 2020 6:00 pm

ProPower engines wrote: ↑Fri Feb 21, 2020 4:10 pm Hey guys
Does anyone have any info on the GMP LS9 CNC ported heads?

Looking for some basic flow numbers to get on with cam choice.
This is a 4" stroker deal with a 4.030 bore.

Any info will be greatly appreciated

Dave

Not sure on the flow numbers. I do a lot of machine work for a LS builder who uses them. The only complaint I have heard from him is the valves are fairly short and therefore difficult to achieve enough installed height for higher lifts. He found some retainers and locks from Brian Tooley that helped him some.

randy331 · Post by **randy331** » Fri Feb 21, 2020 10:55 pm

ProPower engines wrote: ↑Fri Feb 21, 2020 4:10 pm Looking for some basic flow numbers to get on with cam choice.

So,... your looking for a "basic cam choice" ??
I mean without exact flow numbers how could you get an exact cam choice??

ProPower engines wrote: ↑Fri Feb 21, 2020 4:10 pm Any info will be greatly appreciated

Stop picking camz with flowZZ!

Randy

ProPower engines · Post by **ProPower engines** » Fri Feb 21, 2020 11:39 pm

randy331 wrote: ↑Fri Feb 21, 2020 10:55 pm
ProPower engines wrote: ↑Fri Feb 21, 2020 4:10 pm Looking for some basic flow numbers to get on with cam choice.
So,... your looking for a "basic cam choice" ??
I mean without exact flow numbers how could you get an exact cam choice??

ProPower engines wrote: ↑Fri Feb 21, 2020 4:10 pm Any info will be greatly appreciated
Stop picking camz with flowZZ!

Randy

HA HA

I was looking for a base line for a off the shelf from GM dealer what to expect before I do flow them so a cam can be chosen since there is no further port work being done at customers/dealerships request which may really suck depending on what they do flow like.

A_VAS · Post by **A_VAS** » Mon Feb 24, 2020 4:18 pm

this article has some graphs of LS9 stock vs. the CNC version

https://www.enginelabs.com/engine-tech/ ... -ls-heads/

ProPower engines · Post by **ProPower engines** » Mon Feb 24, 2020 5:29 pm

A_VAS wrote: ↑Mon Feb 24, 2020 4:18 pm this article has some graphs of LS9 stock vs. the CNC version

https://www.enginelabs.com/engine-tech/ ... -ls-heads/

Thanks for the link. I have them out at the flow bench at this point but it will be nice to compare between the two.
They are so cheap up here I looked at doing a set but customer found these in Alberta at the local dealer.
Decent castings and thicker then the stock heads.

Don Terrill’s Speed-Talk

GMP LS-9 CnC Ported Heads

GMP LS-9 CnC Ported Heads

Re: GMP LS-9 CnC Ported Heads

Re: GMP LS-9 CnC Ported Heads

Re: GMP LS-9 CnC Ported Heads

Re: GMP LS-9 CnC Ported Heads

Re: GMP LS-9 CnC Ported Heads