Benefits Of 9:1 Pistons

[bry2gdsm]

Hey Guys On The Near future i am planning to put some forged pistons and rods on my 2g. the other day i watched a cp 9:1 pistons and Manley rods combo(Also If You Could Me Is This A good reliable brand & works ans if not what piston & rod combo you guys use, im looking for 500-570 hp) (Using It with stock bore and crank (no stroker kit), so i was wondering what would be the gains of using higher compression pistons? i know i would give me more power @ less boost right? and that i had to be very careful with knock @ pump gas so i was planing to put meth to fight with the detonation. also do i have to run less boost with them? ( i know this is a silly question because evos are 8:8 and run 30 + psi. But Just to clear my mind. Also What Injectore Would Be Good For a Gt35r? I Have PTE's 880cc are these okay? or do i need bigger ones?
also if you guys could explain the benefits of a ported and ported s compressor cover would be greatly appreciated.
Thanks In Advance,
Brian

 

[canada4g63]

You answer you own question. 9.0 with 93 pump gas will be fine, i have 880 on my 35r they work fine but you can find bigger used on here for cheaper than 880's new. Porting will give you quicker spools.

 

[JEFFREYCASTGSX]

Pros: Faster Spool, more power(under boost too)
Cons: More prone to knock

 

[1gDSM4g63]

Higher compression has more bottom end power. More volume in a forced induction will create faster spool and you're correct about running less boost gaining more or equal hp to running lower compression block. However, running higher compressions and getting the same amount of boost as lower compression blocks is not that easy. More knocks so you'll either have to deal with running less boost than lower compression engine or go find something that knows how to tune.

And not canada4g63, porting does not = fast spooling. You'll have a slower spool time. All it does it create better airflow and less choking. It is good for running high boost with a big turbo.

 

[viperlp01]

Just a side note you should bore your block.. Its safer.. It makes sure everything is straight and tight..

 

[dsm-onster]

also if you guys could explain the benefits of a ported and ported s compressor cover would be greatly appreciated.

The ported cover is for a compressor that likes to surge. It is actually LESS efficient. It broadens the map. But broadens it to the left, moving the surge line away from your airflow your motor will injest. But it's a sacrefice in slight flow. The port ends up being a lip right after the compressor inlet (Step out and step in) it becomes rather turbulant at compressor flow limits.

Most likely a real gt35r won't spool fast enough to surge. The likelyhood is not as high with this turbo.

Things that open up flow help prevent surging. Manifold upgrades, cam upgrades, stroke upgrades. . .

 

[bry2gdsm]

The ported cover is for a compressor that likes to surge. It is actually LESS efficient. It broadens the map. But broadens it to the left, moving the surge line away from your airflow your motor will injest. But it's a sacrefice in slight flow. The port ends up being a lip right after the compressor inlet (Step out and step in) it becomes rather turbulant at compressor flow limits.

Most likely a real gt35r won't spool fast enough to surge. The likelyhood is not as high with this turbo.

Things that open up flow help prevent surging. Manifold upgrades, cam upgrades, stroke upgrades. . .

Thank You For Your Help, It Is Greatly Appreciated!

Ok Now Im A Little Confused(I Know About A/R And Stuff But Im Learning On Compressors). A Ported Compressor Housing And A Ported S Compressor Housing Are The Same? By Map Do You Mean The Flow Charts That Are Showed On The Turbo's Specs? So Simply A Ported S Compressor Is An Overkill For A Gt35r. Also I Have Another Question, Do The Turbine Wheel specs change if you change the a/r of the housing?

Anyway So You Guys Can A Get An Idea A Not Be Confused This Is The Turbo I Want To Buy:
EXTREME PSI : Your #1 Source for In Stock Performance Parts - Garrett GT3582R Turbocharger : 400-600 HP

Im Going With The 63. A/r housing because the car most of is life its in the street and .82 a/r is to laggy i've been told. So What Compressor Housing Option Should I Use? T04S?
(Because T04S Ported Shroud Is An Overkill For A 35r Right?

Like a fellow user said should i bore it? what do you think? it's just that im putting the pistons and rods for kinda peace of mind that something would not break, i didn't wanted to bore it because here in puerto rico most of the machine shops do a half-a** job and you have to be on their back so they can do it otherwise your block will be there siting around for a year... there's only like 2 reputable machine shops round here but i wanted to keep it stock bore. i don't want that much power... fwd s*cks = wheelspin hehe

1 Last Question (Sorry About All The Questions Im 16 So Im Kinda Noob On This) Wouldn't I Be Able To Kill Some Detonation By Using Water/Meth Injection?

Again Thank You For Your Help It's Greatly Appreciated
Thanks
Brian

 

[98GSt_4life]

im running eagle rod/ wiseco 9:1 combo and have had no problems running 20-23psi on a evo 3 16g with 93 octane. im on a very basic tune with dsmlink and stock timing. this is in the florida heat too and at the most i only see 1-2 counts of knock at the top of a 4th gear pull and i still get alittle over 300 miles to a tank. although every car is different and may just be lucky