I currently have a boosted d16z6 and i'm running the 18G on 10psi making 220-230whp, the only upgrades i've done to the engine are the fuel system. This winter i plan on pulling out the motor and building everything from the ground up..full valvetrain with pistons and rods, i want to make about 350-400whp..will the 18G get this done for me? or is a new turbo what i'm going to need?

 

bump?

 

Barely. But its pushed outside of its arena if you don't make about $200 in changes at least for just getting the 350whp. Forget about the 400whp. won't happen. Time to upgrade to a GT3071R or GT3076R that have internally gated T25 flanging. it is available.

 

what $200 in changes do you suggest? I talked to you about the greddy kit on aim a few days ago

 

Upgraded actuator, Reworked and modified gate opening and flapper door, and porting of the turbine inlet. so about $200 est. But that's for the 350whp mark at over 15psi or so. So you'll need some sort of boost controller as well.

 

christ.

 

Since we're on the topic of changes made with the 18g to make more power ...

What about an external wg, with different elbow/downpipe thats 3"?

 

and the good LORD loveth you too!!

 

yeah. that's fine and has been done. the OP wanted to know ways of improving HP without going external. the issue of cost wasn't relative to his inquiry.

 

Its not his fault

 

this turbo will do that power as long as the other material are OK enough powerful.

 

^what he said lol...

 

win

 

i think with a built motor its possible but u need to go external wg and you will have to get a ramhorn manifold and a t3 to t25 adapter...i made 295 hp with my stock b16 with my internal wg 18g at about 16psi, then i went external wg and thats all i changed and made 350hp on the same stock b16 at 15lbs, now i have a fully built 84mm b16 and didnt change the turbo setup and have made 430hp at 15lbs with the 18g and still have to finish tuning out to 23-24psi, so it is possible with this turbo to make some good numbers, i bought my turbo for $300 so not bad lol...good luck

 

^^ i like this success story, how do i go about changing from internal to external? is there a write up anywhere?

 

Who do recommend or know of that can do everything you mentioned??
I have the same kit and wouldn't mind crankin' up the boost

 

I've performed those services, but 430hp by 16psi on a 41lbs/min isn't possible.

 

I'm not lookin' for that much power. But to just get the max hp outta the street legal kit.
Would i be able to send my maniforld assy to you to perform these necessary mods??

We can keep this to pm's if you'd like

 

I'd like to see a dyno graph from 90 JDM EF8

 

aright here's a better question then...what kind of horsepower can i expect to make if i leave everything as is, upgrade my injectors, build my block/head, and then max out the 18G with the actuator and everything the way it is now??

 

id say with the greddy 18g, 350 is right around the sweet spot. atleast what ive seen

 

Without those changes to the turbo, doing what you plan won't help as the turbo will be very restricted. PM me.