I'm a little up in the air about which kit I want to go with now.

My question I need some help with answering for you all is, I have to run hi-flow converters here in Canada no matter what, could the extreme kits 3.5" down pipes be replaced with 3" custom hi-flow converters? Is this worth it??

Built motor wanting 500-550rwhp

I like the fact that the extreme kit has a real good fuel kit and external WG.

 

Quite a difference in price there to compare them equally. Of course I would choose the extreme over the standard but the standard is more then capable to make 500 to 550 with a little help. You have a unichip tuner? You can buy a upgraded JWT less the fuel system and tuning hardware for less then either, pick up a utec and return fuel system with injectors and be ready to go.

 

If you only wanting 500-550whp, than why not go with the APS TT tuner kit and pick out your favorite ems and fuel system? It's at least $2600 less than the Extreme.

 

Ya, I think ur right,

 

I vote for the Extreme kit even though I'd rather have Phunk's new fuel system. It would be a tough choice between the tuner kit and the Extreme though.

 

Can the extreme kit be purchased without the fuel system??? I'm guessing no, but figured I'd throw it out there.

 

Buy the Extreme kit and I'm sure someone will take the Extreme fuel system off your hands for $1800 or less.

 

The fuel system it comes with is bad ***. I think you get the upgraded 750cc injectors also.

 

Go for the Extreme!!! I did and dont regret it. 500-550 is no big deal and you should get there easy with the extreme.
Edit: not sure about running it with the cats on though. I made the mistake of first putting a nismo exhaust on the car and it put too much back pressure on the car and couldnt boost past 12psi without problems

 

It actually comes with 880cc injectors.

 

Actually they are Siemens 60lb injectors (about 600cc) that (i assume) are over-rated by APS because they use higher fuel pressure. You could probably max them out with a single fuel pump if the flow of the rest of your system was optimized. Perhaps APS modifies them to flow more? Its possible, but I have heard reports of very high duty cycles just for mid 500's RWHP. Unfortunatly that kit does not allow you to upgrade your injectors either, because those fuel rails are too large to fit under the intake manifold with other aftermarket injectors (which are much taller compared to the Siemens 60lb'ers), its been tried.

As for the topic - with the Extreme kit all you need to buy is an EMS and all your HP problems are solved (assuming a built engine of course). Its definatly a bit of overkill, but its there.

The other option is the Greddy kit, because it has the external gates you are looking for at much less cost, and 500-550rwhp has been done countless times on those turbos now.

 

I didn't know that, I have the CJM S1 and I would rather use that anyway. I wouldn't want to be stuck with their injectors.

Charles were can I reach you Ive decided i want to get the stage 2 upgrade now before the install. PM and number to call you.
thanks

 

Maybe APS does modify them then. They state 880cc on their website, but I am not sure how they obtain that with the 60lb injectors. I hope the duty cycles aren't too high in the mid 500whp range, the rest of the kit would seem to be a bit overkill. I guess it'll be interesting as more of the Extreme kits start pushing for some bigger numbers.

 

I should restate that. When I got reports of high duty cycles at mid 500s, it was not said to me that they were at the limit, just that the duty cycles were very high considering what the size of the injector is supposed to be versus the HP. How high they were and how much more room to go I am not aware of, so I dont want to imply that they were maxed out or anything when that is not the truth.

 

Good point. I'd like to pair the APS Extreme with the CJ stage 2 + pump (3) when the new pump is available...

 

APS TT with Extreme Fuel system. Less lag, APS TT will do 500-550whp easily enough.

 

The Extreme turbos are quite a bit bigger...and full boost comes on around 5000rpms according to Sam@GTM, which is quite a bit higher than the standard APS TT kit. Although you may get more hp out of less boost with the extreme kit, the powerband at the same peak hp level for both kits may favor the standard kit.

 

thats a good point, thanks for the info. I think I'm just going to stick with the standard kit for my needs/goals and drving habits.

 

interesting..

would you guys put into factor that 500-550rwhp really has traction problems on the street.

so basicly the extreme kit would hit its full boost when it could be optimized most on the street? and when shifting going WOT you are already right at about 5000rpm so in essence that boost lag really dose not come into factor except when your coming off the line or in lower gears when you want traction the most?

could someone help me out on this?

maybe post two similar RWHP dyno's with the same power levels to compare the power bands?

sorry for bringing this back to light but im about a few weeks from my car going to GTmotorsports and if spending my money on a head package and just getting a different fuel system instead of opting for the extreme kit is the better option i would like to explore all possibilities.


i really like the idea of getting a fresh(brand new) kit put on with a great fuel system and bigger turbo's dosnt it also come with a bigger innercooler?

 

I already posted on another thread about this jimmy. i would stick with what you have. get the fuel setup, heads, fcon and i think you'll be happy. i don't think i need a street car that doesnt reach its boost till 5000rpms(aps tt extreme). reminds me a single turbo supra. its a nice kick in the pants for sure, but too short lived for me. i would have went with a set of heads this time but my bill was getting out of hand. if the car holds together for a year or two, i might do the heads, 20G wheels, and a twin pump setup and see if i can reach 650whp on the unsleeved block.