Nissan 370Z Forum

Nissan 370Z Forum (http://www.the370z.com/)
-   Forced Induction (http://www.the370z.com/forced-induction/)
-   -   Pistons, Rods, and head studs. (http://www.the370z.com/forced-induction/36405-pistons-rods-head-studs.html)

Vinny 05-14-2011 08:41 AM

Pistons, Rods, and head studs.
 
Hey everyone! I bought a stage 2 TT kit for my Z a few months ago, and I'm looking into upgrading some of the internals. Does anyone have an idea of the labor time would be for new pistons-rods and head studs? I'm assuming I'd have to replace my fuel pump/injectors along with that, correct?

SPOHN 05-14-2011 09:06 AM

Why would you buy a TT setup and not really have a clue of what's needed or what has to be done? If you have to ask, maybe you you need to rethink some things and do so searching. Not trying to be an a$$. Just doesn't add up.

:werd:

Nixlimited 05-14-2011 09:13 AM

Quote:

Originally Posted by SPOHN (Post 1110285)
Why would you buy a TT setup and not really have a clue of what's needed or what has to be done? If you have to ask, maybe you you need to rethink some things and do so searching. Not trying to be an a$$. Just doesn't add up.

:werd:

A lot of people are running stage 2 setups without upgrading their internals first so I think you're a bit off base.


As to the OP, I would suggest you call GTM or another local shop where you may get your work done. Not many people on this board seem to have that kind of work done yet.

Vinny 05-14-2011 09:19 AM

Hey spohn, why would you waist your time posting something completely useless? You're implying everyone out there that wants to enjoy the fun of a forced induction car should go get a mechanics license first? Stop being a douche and try doing something helpful next time, or don't post.
:gtfo2:

SPOHN 05-14-2011 09:29 AM

Quote:

Originally Posted by Vinny (Post 1110295)
Hey spohn, why would you waist your time posting something completely useless? You're implying everyone out there that wants to enjoy the fun of a forced induction car should go get a mechanics license first? Stop being a douche and try doing something helpful next time, or don't post.
:gtfo2:

Not wasting. Just doesn't seem like you have clue to what your getting into. You already have purchased a TT kit and your asking if you need a fuel pump. Just seems you need to learn some more things about these setups and what your in for. It's called constructive criticism. I know alot of people can't take that these days.

So on a side note, it would cost you 5K plus for a shortblock and labor. That's a rough estimate

Vinny 05-14-2011 09:30 AM

Thanks nixlimited, I'll do that. I spoke to GTM about 3 weeks ago, And I was supposed to get a package/estimate, but haven't gotten an answer yet. I wanted to get an opinion from members on here before talking with the shop I usually deal with, because they tend to overcharge.

Vinny 05-14-2011 09:32 AM

I have a fuel pump.. I was asking if I needed to upgrade it. I bought the turn-key kit from GTM. Now please don't clutter the rest of my post with your "constructive criticism", I'd like to get some useful advice.

Lemers 05-14-2011 09:33 AM

He doesn't really need to know anything about turbo set ups if he has the money to do anything needed.

SPOHN 05-14-2011 09:34 AM

What fuel pump to you have now? What HP do you plan to run? This answer will determine what type of fuel system you'll need to run.

Vinny 05-14-2011 09:37 AM

Walbro 255lph, shooting for 600whp.

SPOHN 05-14-2011 09:42 AM

Quote:

Originally Posted by Vinny (Post 1110315)
Walbro 255lph, shooting for 600whp.

In that case (this is MO) I'd run complete return fuel system. GTM stage two kit seen here.

GTM Motorsports*::*FUEL SYSTEM*::*GTM STAGE 2 FUEL SYSTEM

You also could go to this type of fuel pump which is a step up.

http://www.forgedperformance.com/sto...e=0&featured=Y

jnaut 05-14-2011 08:59 PM

Quote:

Originally Posted by Vinny (Post 1110259)
Hey everyone! I bought a stage 2 TT kit for my Z a few months ago, and I'm looking into upgrading some of the internals. Does anyone have an idea of the labor time would be for new pistons-rods and head studs? I'm assuming I'd have to replace my fuel pump/injectors along with that, correct?


Labor time i would assume around 40 hrs. pulling the engine , about 16 hrs to r & r engine plus another 24 (ish) to rebuild engine plus machine shop for balancing. as for fuel pump no and if your keep the boost levels at a reasonable level then no injectors either.

Are you replacing rods/pistions for "piece of mind"? or to turn boost levels up?

Vinny 05-14-2011 09:37 PM

Would be to turn up the boost. Not by much, but reaching for 600whp. I'm assuming im right around 530whp at 10-11 psi, so it wouldnt be too big of a jump I don't think, correct me if I'm wrong.

toner123 05-14-2011 10:38 PM

GTM got 611 WHP out of the fuel pump you currently got installed. If you look in the thread I made about building the block there is some good info in there. I have been waiting for a package price also from sam but no need to rush since this will be done the earliest in winter.

Vinny 05-15-2011 10:04 AM

So in that case, I could potentially keep the same fuel system, and just replace pistons/connecting rods? I was told by another member that head studs were also required, can someone shed some light on this?
Assuming I'm not way off on this, I would think around 15psi would suffice to hit 600whp or darn close, too much for the injectors?

JB-370z 05-15-2011 10:22 AM

Quote:

Originally Posted by Vinny (Post 1111917)
So in that case, I could potentially keep the same fuel system, and just replace pistons/connecting rods? I was told by another member that head studs were also required, can someone shed some light on this?
Assuming I'm not way off on this, I would think around 15psi would suffice to hit 600whp or darn close, too much for the injectors?


No because the fuel system that comes with the stage 2, is maxed out around 580-600. You need larger injectors at the least to hit 15psi. And even if you do hit 15psi, your then maxing out the stage 2 turbos. Best practices would be not to max out any of your components.

Vinny 05-15-2011 11:15 AM

hmmm.. So basically hitting 600whp isnt realistic unless I change my turbos?

JB-370z 05-15-2011 11:52 AM

Quote:

Originally Posted by Vinny (Post 1112018)
hmmm.. So basically hitting 600whp isnt realistic unless I change my turbos?

Not true. You can get in the 6oo's but your starting to max out the turbos at this point. When you are hitting 600whp on stage 2 you are basically starting to max them out.

Here is a G37 with stage 2 turbos, 3" down pipes with external WG's and 3" exhaust. Check out the link below. He is making 611whp on 100 oct fuel. My bet would be that you could get 650whp out of the stage 2 turbos, you would really be working the turbos hard at this point though.

http://www.the370z.com/forced-induct...p-474rwtq.html



http://i313.photobucket.com/albums/l...SI-100-OCT.jpg

Vinny 05-15-2011 12:23 PM

Sorry for all the questions, just a bit confused. Since I shouldn't max out any of the components, and both the turbos and fuel system max out at around 600, they should both be changed before reaching for 600, correct?

jnaut 05-15-2011 12:41 PM

Quote:

Originally Posted by Vinny (Post 1112137)
Sorry for all the questions, just a bit confused. Since I shouldn't max out any of the components, and both the turbos and fuel system max out at around 600, they should both be changed before reaching for 600, correct?

I dont think you need to change any of those items for 600hp (depending of the brand of dyno , ofcourse), but to keep things reliable, you cant keep maxing out the potential of the turbos. But for sure the stock pistons cant take that cylinder pressure @ 12+ psi.

Vinny 05-15-2011 01:13 PM

That's great news. Maybe what I'll do then is change the pistons/rods, and set a high boost to aim for 600whp, and a low boost somewhere around 550-560.

JB-370z 05-15-2011 03:26 PM

Quote:

Originally Posted by Vinny (Post 1112221)
That's great news. Maybe what I'll do then is change the pistons/rods, and set a high boost to aim for 600whp, and a low boost somewhere around 550-560.

BINGO!
:tup:

Vinny 05-15-2011 03:29 PM

So once the pistons/rods are changed, i can up the boost to 13-14 psi to reach for 600whp on my high boost setting, correct?
Also, would it be a good idea to change my head gaskets while I'm at it?

jnaut 05-15-2011 06:20 PM

Quote:

Originally Posted by Vinny (Post 1112394)
So once the pistons/rods are changed, i can up the boost to 13-14 psi to reach for 600whp on my high boost setting, correct?
Also, would it be a good idea to change my head gaskets while I'm at it?

You have to change them to replace the piston/rod but i would use factory nissan head gasket. They MLS which can take quite a beating.

Vinny 05-15-2011 06:33 PM

Thanks for the info! I think what I'll end up doing is ordering the stage 1 GTM shortblock and see what my local shop suggests as far as injectors/fuel pump.

jnaut 05-15-2011 06:38 PM

Quote:

Originally Posted by Vinny (Post 1112619)
Thanks for the info! I think what I'll end up doing is ordering the stage 1 GTM shortblock and see what my local shop suggests as far as injectors/fuel pump.

If you haven't bought anything yet , the walbro 255 should be fine, but most go with deutsche works 600cc, but i would get a little bigger than those just tuning become a little difficult .

Vinny 05-15-2011 06:45 PM

Yeah as of now I have the walbro 255 and denso 600cc injectors. What would you recommend? Keep the walbro 255 and get maybe 800cc Injectors?

jnaut 05-15-2011 06:52 PM

Quote:

Originally Posted by Vinny (Post 1112646)
Yeah as of now I have the walbro 255 and denso 600cc injectors. What would you recommend? Keep the walbro 255 and get maybe 800cc Injectors?

speak with sam, when you go to order your short block. I do think you need more injector with what your trying to do.

esfourteen 05-15-2011 08:15 PM

Quote:

Originally Posted by jnaut (Post 1112667)
speak with sam, when you go to order your short block. I do think you need more injector with what your trying to do.

I agree, 600cc at that power level is probably close to maxing the duty cycle. go with 800's.

SAM@GTM 05-16-2011 12:30 AM

This is becoming a very popular question, I'm putting a list together that will benefit a lot of guys that are twin turbod and looking to take it to the next level.

I will put some info together and post it here .

Sam

Vinny 05-16-2011 11:23 AM

Thanks, Sam!!

Brazilbro 05-16-2011 01:51 PM

Quote:

Originally Posted by SAM@GTM (Post 1113232)
This is becoming a very popular question, I'm putting a list together that will benefit a lot of guys that are twin turbod and looking to take it to the next level.

I will put some info together and post it here .

Sam

:tiphat:
Can't wait :yum:

JB-370z 05-17-2011 05:07 PM

I think even if it is not 100% necessary to to build the block. The peace of mind it gives you makes it well worth every penny. Sam I think you will have a ton of engine internals orders after you post your thoughts, I will for sure be one of them, thanks.


All times are GMT -5. The time now is 06:39 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2