Isayimandrew's Twin Turbo Build

Spooler

3in downpipes and exhaust will help. I doubt it drops any boost pressure. I have the CJ Motorsport Motec 5 Bar map sensor on my car. It's worth it. At 20psi it will last a while depending on what boost level you drive it around on everyday.

Spooler

I just looked at your Fast Intentions TT kit and turbo size. You have the old stage 2 or new stage 1. You are good for about 796whp at 21psi of boost. If you try to push the boost over that you won't make proper power. Your efficiency disappears. You should at least put on 25whp for every psi of boost. If not, then you have an issue that needs to be addressed.

isayimandrew

Thanks for the reassurance on my build! Even with the re-tune, we are still going to keep it at the same power level so I'll be well within the limits of my build. Sounds like my manifold should hold up for a while but hoping I find a long term solution if it does eventually start cracking.

Elmo370z

Guy just made 1100whp and power still climbing with a aam manifold.

isayimandrew

Is the AAM manifold good now? Saw a lot of quality issues but those were all dated a while back. Didn't know if it was still an issue or if that has been resolved.

Elmo370z

They are hit or miss. If you get one, port it out to make sure none of the poor casting materials break loose and get sucked into your motor.

Clippers_FTW

thank you for all of your information on this thread. stock block held up for 2 years at 618whp 12psi. decided to build the block etc. all this stuff about the head lifting doesn't give me the most confidence. but im still looking forward to my build. hopefully done sometime in February or March... with the amount of money i've dumped into my car i shoulda just bought a g80 lol ... but a fast vq37vhr is a lot cooler than a cut and paste g80. so. there's that.

isayimandrew

I had a lot of guys on this forum give some good info too. With the money I dropped on the Z, I could have gone a different route too lol As long as you're not trying to go for some crazy power and chase numbers, you should be fine with the head lift issue. Most of the experienced guys here like spooler say if you go for anything over 800whp is where you really need to have everything go right.

Clippers_FTW

Yeah... plan is 800-1000 range. Builder assures my motor will be able to take it. put a lot of money into it. taking their time and building it right. i'd be happy right around 800. more than enough for my local boosted vq's to give them some comp. Cant wait till this build is done. its gonna be a monster.

Spooler

Good luck. If you have any questions, just ask. Don't wait until you have a disaster on your hands.

Clippers_FTW

I have pretty much everything squared away... I just need to figure out how im going to get the power to the ground. my 9 1/2 inch wide enkei t6r's with advan 285's just arent going to cut it. Its built for roll racing but i'd still break loose on occasion at 618hp. i'll be adding an extra 200 now.. so I gotta figure that out. Every website i go to has different sizes etc. I know i just need to do even more research but its a daunting task. I'm still on stock suspension.. i just want something that will fill out the wheel well and not rub and allow me to put all the power to the ground. I'm not sure if i need beadlocks or not and if so which ones. All the welds I saw are 10 inches wide... do they make wider? I know im totally on the wrong site for those specs seeing as im a g37s and everyone here is 370z etc. becuase i know its def different between the two.. all the g37 websites are dead. this is the only active vq one that i could find. Anyways besides that i think im pretty much covered ... 40k later.

Clippers_FTW

ive been looking into the 17 x 10 because i want to retain the stock rear brakes... but.. are they worth getting rid of for the 15 x 10? are the 15 x 10 that much better?

Spooler

You don't need 15's. Weld sells 17x10 in wheels that fit the 370z. Not sure if they will fit a G37. Just call them up. Tires, Mickey Thompson Street R radials. I run 305/45/17. What turbo kit do you have and what turbo are your running. Intercooler size is next question. It needs to be large. 28x12x4.5 large. Suspension needs the works done. Rear diff upgrades are needed or else you may end up with a totaled car when it snap oversteers on you.

Clippers_FTW

I have the soho stage 2.5 (was the best/most expensive kit they sold at the time). it comes with the GARRETT dual ball bearing GTW6765R). The intercooler came with the kit but it was their largest at the time, more than likely will have to go larger. The g37s sport package should come with LSD no? i was told it did. Its not open diff like the base or journey. I've got mixed reviews on suspension. I was told the g37s sport models come with a good suspension for roll racing. if thats wrong i'll put a budget together for a good set of coilovers (Any suggestions?) also.. any suggestions on rear diff if mine with the LSD isnt enough?

Spooler

You are good for about 700-800whp with that kit. Your IAT's will be hot. The stock VLSD will kill you. It is unpredictable. You need a Wavetrac or OS Giken upgrade. If you are struggling with traction, concentrate on improving that. That is where the coil overs help along with a long list of SPL suspension parts. Take your time. It takes time to get these cars right and to hook. Lots of reading you can do on here.