Boring and honing is the same.. I would get 95.5 pistons and hone it a little bit for .045 Piston to wall clearance

As for pins.. yes Wiseco already offer upgraded pins for turbo cars, if I remember correctly it was $10 for upgrade per piece.. here the link. Automotive Accessories For Drag Racing, Sport Compacts & More. - Wiseco Piston Inc.
as you can see. there are different kind of pins.. :tiphat:

This is my 2nd boosted VQ. First g35 I had a gt35r and was about the max torque the stock block could handle. 8lbs at 420/400 on mustang dyno and I drove her hard everyday. The g37 is a stronger motor and the rods r beefier. This set-up I'm at 534/500 and it's an absolute blast to drive. She sees full boost almost every day. I guess I love te power, I feel like I got a little understanding how these cars like boost. With a good solid tune n install the 37 should be able to hold power well. So far no problems! But if I do blow my motor then I get to do my engine build sooner than later. I honestly feel like where I'm at now this motor will hold for awhile. Only time will tell but I sure didnt spend all this money to play it "safe". Up to a certain amount yes but you only live once and I wanna enjoy the hell outta this ride. Lots of street fun with buncha other boosted rides. Evo, GTR, Subbies, big turbo Hondas n Tegs, Genesis turbo, even ran with a Bugatti on the highway which was fun as hell. Yea, this car sees A LOT of boost. If there's anything I can confirm with the 37 is that it loves boost and the engine has held up so far with no problems at all.

Okay 95.5 mm pistons for this build with upgraded wrist pins.

What do you guys think about GTM's valve train upgrade kit? It's around $1500. So far that covers Viton seals.

Just to throw another option out there: Anyone considering stroker kits? I plan on doing an engine build in the future as well and figured if I am in there and buying all the parts, why not go big? Would there be any additional upgrades needed, other than the additional work at the machine shop?

Both GTM and Brian Crower offer some pretty attractive kits.

Sheesh! Hopefully u can get that or maybe a bit more. That's how it always is, get one thing done and two more pop up.

Sent from my Samsung Galaxy Note 2 via tapatalk

I like the idea of a striker kit also. Haven't seen one on the 37 yet, maybe 1 car that had numerous sponsors. White 370 I think had stroker.

just to recap for my build not to include the lame stillen kit i am using

wiseco 96mm 15.5cc forged piston (just under 9:1cr because of a thicker head gasket)

eagle rods with bearings(using the stock bearings new)

arp headstuds

fuel were using automotive 340lph fuel pump w/upgraded wiring and 900cc injectors
may not need to go return just yet

so for right now fuel and a shade motor is not a problem i just need to get the correct power adder to really love driving this thing

:pics:

I believe that the blue and orange 370 for sale in the classifieds with the Stillen SC kit has a stroker motor. I however don't think he has any information on gains.

No stroker for my build, although it is tempting. IIRC, just more heat. I'm sure responsive tuning is more than adequate.

I think there have been a few GTM customer vehicles with the stroker motors as well. I am mostly interested in how that would affect torque and turbo spool. I am guessing I might need to upgrade the GT28s to something larger to really utilize the increased displacement. Any thoughts?

DIGItonium - I think you could manage heat well with an upgraded radiator, which for reliability reasons, I would probably want to do if building the motor.

Might have to upgrade turbos or push more boost to reach desired hp level but you can only turn it up so much before it becomes inefficient. Think the Gtm strokers I've seen have been on the 350 platform. Some TT stage 3 or big singles. The torque should definitely go up with the stroker, most likely more torque than hp.

Im so glad this thread came up if I could rep you a bunch in one day I would. Im going to give Z1 a call and get a price list going and possibly start ordering parts. Then I can leave the car with them on the way home from ZdayZ next year :driving:

I would love to be able to get price lists in the thread to help compare/contrast options by desired RWHP goals. Built internals, strokers, head work, etc. That would be a GREAT resource! I am happy to help out.

i dont think the stroker kit is necessary. unless your going for bottom end power and no top end. It most likely will kick in the spooling time for tiny turbos, but going with a bigger turbo i dont think you will ever reach full boost in it.

But i take the over kill as a compliment g37hks dood. im doing it right one time. im not going to take apart the engine just to get to the block again. building it from bottom up. might as well. but ive also thought isnt this what building a motor is?

oh well just my input.

My view on it being overkill is that you are nearing 20k + build. I own two 370z now both with expensive visual mods, and one with TT.

Im not putting another 20k into one of these cars I will just sell both and get a GTR if I even think of spending that much more.

A larger displacement motor will spool any turbo quicker. As far as it being for low end power and no top end, that's up for debate. I would think that cam profiles, any head work, and turbo sizing would be more of a factor in determining the shape of the curve. You'll definitely make more power down low, but I don't think we've seen enough stroked VQ37s to determine if they die off up top.

Especially if using a big single turbo. Single turbo on a stroker kit would be siiiiick! R some big twins like Squeeze has.. With e85 n meth the power would be great. We just have to wait til someone can go down this path. It's been done on the 350/35 platform already. Built motor + corn fed = big numbers

pretty awesome information! noob here, i was wondering if there are any info or parts from the gtr engine perhaps that would help with building this motor? i understand that the two engines are substantial different, but i am assuming there are more GTR built engines out there.

i came across this during going around the web, Nissan GT-R VR38 Engine Build - YouTube

it would be awesome if someone does this for our motor.

Overkill or not, I could only hope that if you do ever build your motor you use it to its potential! That is a GREAT list you have and with all that 600 hp would prolly barely scratch the surface of what your build could truly handle.

When I build I'll aim for 700+ and I'll make sure I run it at that. To me personally it's only overkill in any scenario if u don't use it accordingly, anything less is a waste.

Cool more power to you. :tup:

If I'm remembering correctly the stroker kit from GTM shortens your revolutions. So if you bought a stroker kit, for example and my understanding, and managed to stuff a 71mm turbo down I think its going to need more time to spool up, right? So our cars are what 7300rpm? If its full boost at 6500 hundred and the stroker kit knocks out the revolutions to 7000 rpm, what exactly is the point of a stroker kit? The 71mm turbo will never be fully used. I don't know but thats my understanding of a stroker.

Boring out would increase the revolutions. I see that MORE beneficial. IF IM UNDERSTANDING THIS. Again, I could be talking about of my ***.

Spool isn't necessary a function of rpm. It's a function of exhaust gas volume and velocity. Higher rpm would provide more exhaust gas, as does greater displacement.

right.
so the revolutions are important. the more the higher volumes of gas and so forth as you stated.

but you going to tx2k13? see your from houston.

A larger displacement engine will spool up a large turbo at a lower rpm than a smaller one. All things being equal, you'd end up at a similar peak power, with the larger engine producing more area under the curve. Also, unless you've chosen a turbo way too large, it's not hitting full boost at redline. You're more likely to see full boost between 3500 and 4500 rpm depending on turbo size.

Being one of the stroker kit owners:

The larger displacement increases the exhaust gas flow. What you have to take into consideration is what turbo or SC'er is the correct size for the displacement. I am running two GTX35R turbos on the 4.5L and it has a similar spool response as the GT28's did on the stock motor. check the video below at 53 secs in you will see my low boost setting on the stock intake manifold. This should give you an idea of what a proper sized turbo to displacement should look like.


With the stroker kits if you go 4.2L you will not have to sleeve the block. However, with the 4.5L you do and this comes with the expense of much more HEAT!!! We had to go with a full race radiator to make it manageable. I still have to talk to Sam to see if there is a way to save my A/C on my build. I believe he removed the A/C compressor so I will need to find a way to squeeze that bugger back in between the cooling mods.

A 4.2L you could get away with the CSF radiator and I highly recommend it! Great Product and Great Customer Service!!!

Yea, part of the upgrade is the CSF radiator. I didn't list it since I'm primarily focused on the engine.

Those who built their motors, anyone got away with reusing the VVEL portion? I think I read it least one person did it without any issues. I was actually thinking about building the block and reusing/upgrading my heads.

@Mike, any word on the lower manifold adapter? My plenum is still boxed up in the garage.

What was the upside of goin 4.5? More low end torque and power?

Why does sleeveing the block create so much additional heat? Do you think it was worth it to add the additional .3L given the heat issues that come with it?

8000 miles on my built engine and I didn't replace VVEL .

I have a couple of things to add for now I'm down in Florida at the PRI show .

No need for nismo oil pump stock is fine .
There is a Haltec unit coming out for the 370 I just saw it
CP does not make pistons for the 370 it will have to be custom set .

What part of Florida r u in now, and more importantly are u here with that built monster?? Lol

Usually it's the combination of the thicker iron cylinder lining trapping more heat and the lining protruding further into the water jacket around the cylinder bore.

Call SAM... I know he has the production unit in hand... the first one is being installed as we speak.

Mike

Going to the 4.5L allowed me the displacement that I needed to reach my goals and beyond... Like they say there is no replacement for displacement! lol

Its not that sleeving the block alone adds more heat its a combination of factors that have attributed to the additional heat. Remember I am keeping the high RPM redline with alot more mass being rotated in my engine. The material that used to act as a heat sink behind the cylinder walls is no longer there... Larger moving parts with a greater surface area along with less material in the block will result in a hotter engine.

another good answer.:tiphat:

Lol I'm in Orlando Florida , and Bullet is home parked.


I had a very interesting conversation with Garret my turbo set up and power goals .

What's the mid boost high boost numbers and graphs ? I have a really hard time believing that 1000 whp can be made with T25 flange because of back pressure.

I would love to see this even though you have a 4.5 liter ,witch I think is the only way to get achieve or get close to 1000whp on these car's

i have only seen the gtm kit but i personally am saving up for the 4.5 stroker kit granted my build plans are all motor

iirc you will see about 490hp with just the kit, nothing else but im not sure

edit, just saw someone else posted about the stroker kit, looks like im going with the 4.2L cause i want AC

for an NA setup definitely go 4.2L!!! You will see 400hp with that crate motor :tiphat:

seriously? now im excited >_< lol

any other supporting mods you recommend(aside from oil cooler, trans cooler, radiator)

oh should i upgrade the brakes as well? i have a stock nismo 370z at the moment and so far i love the brakes on there but idk if it can handle that power and stop me safely