2winscroll

Stock ix turbo will never make more than 420hp no matter what cams you put in it.
Oh wait a minute yea my bad you will probably get 10hp from the gsc2's well worth the $$$$ spent. Sorry I was wrong.

Boost Demon

iTrader: (22)

Here ya go, don't feel bad about get'n cams on a stock turbo, hell make'em big while yer at it:

https://www.evolutionm.net/forums/evo-dyno-tuning-results/642614-evo-8-stock-turbo-93oct-gsc-s3-vs-stock-cams.html

2winscroll

None of those graphs show a boost to boost comparison. One graph does show the a boost plot for the s2's and it drops off to 16psi on the big end, then they blame the cams for not carrying the power up top.

93 octane 10.5 comp and 370+ hp, your on a limited amount of time with that setup. It will go boom.

bboypuertoroc

iTrader: (17)

Well that's completely false.

TariqEvo

wouldnt a big turbo hurt the stock internals? Say an fp black?

bboypuertoroc

iTrader: (17)

Nope. I've been running an FP turbo (Red and Black) since ~2008ish. Still on stock internals to this day. Keep torque below 400ft-lbs (500ish NM) and you'll be alright.

TariqEvo

how much boost and any upgrades on the head?

bboypuertoroc

iTrader: (17)

Was running 30psi on the Red, currently running 24.5psi on the Black.

Head has Kelford 272s, GSC beehives and ti retainers, ARP studs.

2winscroll

10~15 hp is completely nothing in my book. That's basically a change in air temperature will get you that.

Cams, in this situation, are NOT money well spent as far horsepower per dollar is concerned.

Do your research and you will see a lot of stock cammed cars running great well over 500hp. Let's see you do that with a stock turbo.

Kelford 272's in my friends ix had only 10hp more than the stock cams, but the stock cams had more torque. Worth the $$$$ I think not. Stock cams max that turbo out way below redline.

2winscroll

Turbo, injectors, fuel pump and intercooler are all that's needed to get 500hp, anything else is wasted money. After that you should really build your block to handle the power, that's when you need cams.

I laugh at all these clowns with an aftermarket intake and throttle body on sub 500hp cars.

Boost Demon

iTrader: (22)

You're certainly entitled to your opinion on how a car should be modded, but I've seen many results (like the one I already showed) to the contrary that show a cam upgrade on an Evo8 is worth it.

Back in the day, AMS and Buschur Racing even recommended cams as part of their upgrade sequences for stock turbo cars because of the gains they found on Evo 8's. Can you throw a big turbo on a car and make a high hp number? sure you can, but some like to make the most of what they have before moving on is all.

2winscroll

Like I said before no boost curve was posted in that example.
Just doing the math 10~15hp for $700, or 100~150hp for $1700~$2000.
Definitely don't believe that a cam change on an evo8~9 will net you 50hp. If you somehow get those results it's due to the tune not being optimized with the stock cams. You can get an extended rev range but it's pointless because boost is falling off quickly.
It's also been proven that smaller cams will cause the turbo to spool sooner. Food for thought.
Personally I'd save my money for a turbo and do the cams when you can actually use them.

silent_white

fp black @32 lbs on stock bottom end.
92 pump with methanol in the upper IC piping
bc 272's (in the car when i purchased it), arp head studs
intake @ -2 degrees, exhaust @+5 degrees (spools much quicker)

ran for 50K miles like this, pulling motor in perfectly running condition for build.

Johnboy1065

iTrader: (6)

The thread is titled "cams or bigger intercooler." All I did was give the correct answer between the two.

iD33

Intercooler. Can always research into cams in the future. From a cost stand point it maybe wise to delay cams until going with a larger turbo setup. Had HKS 272s on a stock EVO 8 turbo and now GSCs1 on a BBK lite.