so i think ive pretty much made my mind up and im going to be getting the extreme kit.

right now i have a built motor with no head work. and the normal aps kit.

my question is this. at about how much boost would i start to see problems with headlift or any issues? does everyone who has this kit have some sort of a head job?

and also if a headjob should be standard when trying to run this kit which package should i go with? i have a revup motor so i think only the sw1 cams work?

thanks for the help.. i would like to have it set at a 600rwhp daily and then an all out map also. ill be using the utec with the aps extreme fuel system.



ps. my aps twin turbo kit is for sale along with forge boost actuators and rc 650cc injectors. ill be puting it in the for sale section very soon with more details..

 

Headwork wont keep you from lifting heads as far as i know. What studs/gasket are you running? I think you could hit 600bhp with the stock heads but it would not be very efficient.

 

sorry i should of said this is more of a two part question. with what are the limits of the stock heads and when are people seeing headlift.

i guess i just assumed with the amout of airflow the bigger gt turbo's will be putting out it would happen sooner.

im using the arp studs and oem gasket.. if i get headwork done ill def get the L19 and the hks gasket...

 

Stock head gaskets, and the standard ARP studs are a recipe for disaster @ 600whp. 1/2" head studs or at least L19's would be the minimum. The only head gasket I would use is the HKS. SVRT makes a head reinforcement bolt that threads into the heads and adds extra support.

JET

 

^ +1, but it looks like you've got that covered with the L19 and HKS hg's.

OT - with the GT30R's, you're good for the 600whp you looking to make on stock heads. Big headwork is really only necessary when you're looking to rev past stock. Since you're running the RevUp engine, then your redline is already at 7000. You could drop springs, retainers, and JWT S7 cams in if you wanted piece of mind in reving to 7200. But honestly, it's not worth it. If you look at all of the dyno's that people are posting, you'll see that most power bands start to drop at about 6500rpm. Big headwork is great for those pushing past those limits, but we have yet to see it except for a few die hard builds.

Although many will argue that headwork is necessary to flow the boost through the heads, with the levels you're looking at, stock RevUp heads and cams are fine.

As always, just my

 

BTW, nice looking G

 

APS Extreme is a very nice kit, You could do 600whp on the standard APS kit but the external waste gates are great, and you have a lot more potential. I would recommend our stage 3 or 4 heads with our GTM Spec REV up cams. What type of engine management do you have/plan on using for this beast?

-George
GT Motorsports

 

I have the aps ext kit with stock revup cams and am at 534rwhp at 16 pounds. this was on sharifs dyno. to get to 600rwhp you are going to need some headwork.

 

GTM Built engine, FCon VPro, and cams. No headwork. 600whp, here is the link to the thread:
https://my350z.com/forum/forced-induction/227245-i-got-my-baby-back.html

This was done with 100 octane fuel, just showing what you can do with the current kit. But the APS Extreme is the way to go (I switched out my standard APS kit for the Extreme as well) Also with some headwork your engine will run much more efficiently and be able to maximize the gains we will get.

-George
GT Motorsports

 

lol, you change your mind like i do. i thought you were selling the car, now youre keeping it and swapping kits?

 

yeah im keeping it...

 

i hear the aps extreme fuel system only comes with 650cc injectors, or its marked wrong or something....

 

i read somewhere that it comes with 880cc injectors. Does anyone know of anyone who has the kit in stock, i'm looking to buy one soon

 

Think the injectors included are claimed as 880cc, but this is only due to the higher fuel pressure that the kit runs.

Like the original kit, think they advertise 500cc, when really they are 440CC, but with higher fuel pressure.

 

love the wheels. DPE's?

 

I bet you could hit 600 by just adding race gas.

 

They are probably like the 440's in the single kit. they are really 380's or something but because they use a higher fuel pressure, it looks like a 440. i'll be getting the aps extreme fuel system in my new setup and will post the results. most tt's with built motors are using the cjm setup which is limited to about 550whp. they have a new setup thats out or is coming out which will be for cars going past that mark. correct me if i'm wrong but the two kits out there that i know of that flow reliably past 600whp is the AAM external pump setup(too racey for me and too loud) and the APS extreme kit. my car is a G35 and a daily driver so i dont want to hear the fuel pump all the time so i went with the APS kit. Car Version 2 in DE dynoed their 350z at 620whp with no headwork and no cams partly IMO due to the fact they had adequate fueling. http://www.carv2.com/site/content.cfm?id=247 i got the same setup but i have cams, so we will see if i can best their number on the dyno.

 

Probably not on our dyno....

And the concept of "hitting" a number is somewhat tricky. We can hit numbers all we want...but we want our customers safely, consistently, and reliably tuned for the fuels they plan on running. On our personal or shop cars, we go a little more aggressive.

 

I want to come try.

 

yeah they are dpe wheels. thanks


hey so what brand injectors does the aps kit use?