BLKCarbonEVO

iTrader: (2)

I know some of you have seen this in my thread but I'll post it by itself too.

This is our cam test going from a HKS 272/280 combo to a Custom GSC cam. Nothing was changed between these pulls but the cams. Everything you see is straight cam power!

Attachment 338718



Mikey

RSMike

iTrader: (1)

nice results Mikey.

Why does the boost raise with the GSC cams?
Are the ignition numbers for the new zones (higher load) higher or lower?
I dont doubt the improvement, but i do love to ask the questions

red03evo

iTrader: (20)

Very nice increase.

Congrats.

BLKCarbonEVO

iTrader: (2)

I think the real question is, why did the HKS cams drop boost up top and not the GSCs? The reason for that is, that the HKS cams were chocking the motor and hindering airflow in the higher rpms. Power is Airflow and the GSC cams just allow the motor to breath. That is all there is to it... The above graph was a direct swap, nothing changed but AFRs. Timing was the same.

The below graph is a comparison of the same boost levels for the GSC cams vs. the HKS, both holding 25psi at 7300 rpm. Just to show you the boost for boost at 7300 rpms. The GSCs picked up 52HP, however this particular HKS pull was spiking 31psi in order to match the 25psi of the GSC cams at 7300.

So in a nut shell, the HKS cams had to spike 6psi more than the GSCs to be able to hold 25psi at 7300. The awesome thing is that the GSCs still managed to make 52HP more than the HKS and have a better powerband out the top due to the increased airflow.



Mikey

s.e.a.n.

iTrader: (10)

Good comparison

PeteyTurbo@KHC

iTrader: (1)

Actually it will be easier for the turbo to maintain pressure at less airflow.. the power vs. airflow is a totally different story though.. Nice comparo

JohnBradley

iTrader: (30)

*IMPORTANT TO NOTE*

To save some trouble for Greg, anyone interested in these cams can save the phone call to GSC for the time being. They dont have a name so they dont exist.

They are not going to be widely available, they will only be available through EnglishRacing, and they are not drop in friendly. There are definite requirements to make these cams work properly, headflow, springs, turbo size, compression, etc.

thanks

Aaron

FL_SilverEvo8

iTrader: (15)

So you all did your home work before ordering these cams. good job

JohnBradley

iTrader: (30)

I am very much about making the combination work and neither believe in nor practice throwing random parts at a build. This is proof of what many different types of builders, ones here and in different markets, have said for years...Combination is everything.

aaron

need_an_evo

iTrader: (7)

how much do they cost?

JohnBradley

iTrader: (30)

No pricing as of yet. Supply dictates price, supply is still a little bit of an unknown, so pricing has yet to be determined.

aaron

SubieEvoGuy

iTrader: (2)

wow very impressive, thanks for the post.

Acree

iTrader: (8)

Supply, meet demand.

<---Demand

Nice to meet you.

-Acree

jameswwt

My Vote for GSC cams and Greg are truly a helpful person and very good in technical as well...

James

evo8 951

iTrader: (7)

Gsc rocks!!!