Am i in the right direction to hit 450 HP

[juan jz]

Hey everyone my goal is to hit 450HP and I need suggestions of what I might need to get there. Let me know what I might need in my combo so I can achieve my goal. I know a single turbo will put me up there but I want to see how far my twins will go. I'm running a 1JZ, with MK4 water pump/fan clutch, Koyo aluminum radiator, DM front mount intercooler, DM down pipe, 3'exhaust no Cat, HKS TI carbon fiber exhaust, This week I purchased a apexi SAFC II black, Aeromotive fuel pressure regulator kit with hard lines from DM, and AEM boost gauge/type controller.
My next purchase is going to be a set of 550, but doing research to find a set that I will not have to sauder in, (looking for direct fit I don't want to burst into flames),

 

[foreverpsycotic]

Yeah, looks about right. Toss in a walbro or denso and you will be all set.

 

[juan jz]

Yup I forgot about that but yeah I have a walbro fuel pump installed already, how much more can I boost up safely

 

[umran9]

how much boost pressure you running? has the downpipe raised boost pressure? looking to do similar mods to mine...

 

[juan jz]

Its still stock boost, my autometer reads at 11 pounds. Hopefully I have time this weekend to install the AEM boost gauge type controller for more acuracy. Then I'm going to go up to 12 or 14 I just have to do more research and find out if that's safe

 

[becauseican]

Stock twins wont get you 450...you might hit 350, thats the highest I have seen on stock twins. A 60 trim t3/t4 or 61 mm turbo will get you there with good spool. I made 440 whp on my 7m with a 60trim/ P trim turbo at 16 psi. I am currently making 423hp with a DBB T61 at 18 psi on pump gas.

 

[86_sports_1jz]

sounds like you are on the right track, you just need to figure out which turbo you want.

 

[tsuper92]

your going to need to get past the ecu's fuel cut,to have any chance at 450whp

 

[apexi287]

Stock twins wont get you 450...you might hit 350, thats the highest I have seen on stock twins. A 60 trim t3/t4 or 61 mm turbo will get you there with good spool. I made 440 whp on my 7m with a 60trim/ P trim turbo at 16 psi. I am currently making 423hp with a DBB T61 at 18 psi on pump gas.

I made 370hp on my stock twins at 16psi, and at 18psi and 440cc injectors with a slight tune im around 400hp although no dyno chart of the 400. I agree though stock twins won't get 450 a good 61mm would do the trick.

 

[86_sports_1jz]

and you might need to get rid of speed cut to beable to dyno the car

 

[juan jz]

So your saying I'm going to need a Fuel cut defensor soo the ecu works with the set up, and a speed cut defensor to be able to dyno. I think the speed cut is been tapered with I don't think it works, because at around 105 all that happens is the check engine light comes on. I would be happy with 400, thank u guys

 

[foreverpsycotic]

FCD and cut the wire for the speed sensor (IIRC its pink w/ baby blue)

 

[juan jz]

I'm on the search for the FCD then... , I know there's also the option of cams do u guys have any suggetions, I don't want anything too agressive, I was looking at the cheap way, having a set of 2J cams machined for the 1J.