Questions about building up my NT

[Ozzmosis]

My 93 Talon 2.0NT has been giving me some issues lately so I decided to park it and attempt to build it up over the course of the summer. I have a spare car in the meantime, so time is really not an issue. Here is what I have planned so far:

New timing belt, balance shaft beft and tensioners, and accessory belts
New water pump
Rebuilt head (possibly port and polish since I will be removing it anyway)
Turbo camshafts
Higher compression pistons
Total seal piston rings

I already have a few mods done to my car. What other things can I add to this list that would give me a few more horsepower while I'm in there doing all this work?

What are the highest compression pistons I can "Safely" run in my NT? Also, would I benefit at all from installing stronger, lighter connecting rods?

I was thinking of getting a rebuilt head from Taboo Speed Shop. Would I benefit at all from anything higher than a stage 0 rebuild? Would a stage 1 head flow way to much for a NT?

I am not interested in doing a turbo conversion. I'm not doing a complete engine rebuild just fixing what needs to be fixed and adding in some stuff along the way. My goal for this project is a reliable NT that has just a little bit of kick. If anyone could offer any advice or suggestions it will be greatly appreciated.

[cap9qd]

Crank pulley while you have it all taken apart. It frees up some HP.

[Ozzmosis]

That was another thing I wanted to add to the list. Both the crank pulley and accessory pullies.

I was also thinking about replacing the motor mounts with some polyurethane (sp?) ones.

[Taboo]

Originally posted by Ozzmosis
I was thinking of getting a rebuilt head from Taboo Speed Shop. Would I benefit at all from anything higher than a stage 0 rebuild? Would a stage 1 head flow way to much for a NT?

The size of the ports of the stock 4G63 head is an overkill for the N/T engine as they are and any enlargement would more than likely lead to loss of low end torque. The ports of the Stage 1 head are not physically reshaped or enlarged, but the airflow is being enhanced by smoothing any casting imperfections, cleaning up the bowls and namely blending the seats (that are always slightly oversized on our heads) with the throats of the bowls which improves the airflow and reduces turbulence at any RPM. You should see an improvent across the entire RPM band, although one shouldn't expect some 30HP gains due to the highly efficient ports that were already established in the factory.
You would also benefit from removal of the balance shafts, lightened crankshaft, aluminum flywheel and tuned headers. If you use the turbo cams, adjustable cam sprockets might help you extract a few more HP as well.

[Lex_Dog]

i am basically doin the same thing...
everything is at the ahop now... im gettin high compression pistons that are .020 over...
port and polish head..
port match all the manifolds..
new header...
full exhaust..
turbo cams are a definante and the adjustible cam gears will help a lil bit more..
im thinkin about opening up the throttle body a bit and cleaning up the intake manifold alot..
can you get the intakr manifold ported and polished or is that overkill??

i dunno what else to say that hasn't already been said... i should be getting the block and head back by the end of the week.. but it wont be together and back in the car for a while so i wont be able to tell you any results of all that work till mid-end if summer...


alex

[Ozzmosis]

Anyone know where i can find a set of higher compression pistons? Do I have to have them custom made?

[Lex_Dog]

im pretty sure while you have the engine at the shop just your head shaved a little bit and that should raise the compression.. i am not sure if you need high compression pistons or not... i have them.. but i got them costum made so i dont know where you can get a set..

alex

[Ozzmosis]

How much were your custom pistons? I forgot about getting the head shaved, i'll look into that.

Also, would I benefit from total seal piston rings?

[Taboo]

Originally posted by Lex_Dog
im pretty sure while you have the engine at the shop just your head shaved a little bit and that should raise the compression..

Do not shave the head in order to raise the static compression of the engine - unless you want to throw the cam timing off and bend your valves. The 4G63 is a little bit different than a motor in an average lawnmower.

[Lex_Dog]

why does shaving the head cause so many problems... is there anyway to get around that?

[Ozzmosis]

I found this engine rebuild kit at MachV.com (http://www.machv.com/comenrebkit.html). I am now toying with the idea of just pulling out the whole motor and doing a complete rebuild. Does $500 sound resonable for this complete kit?

Also, I have never rebuilt an engine before but I have plenty of friends that could help and work in automotive shops. Like I said before, I have another car for now so time is not an issue. Having never rebuilt an engine before, but having a lot of experience with engines and how they work, should I attempt this project?

[Lex_Dog]

i have never rebuilt an engine either but i decided to do it since i have 2 cars.. but a quick word of advice.. i mentioned that kit and the brand (topline) and said the kit is a good kit but top line is below OEM quality.. i went through basically the same things you are.. i just got most of my gaskets and things from www.partznet.com .. good luck with your project..

alex

[Ozzmosis]

I will probably end up getting this kit anyway just because it's all there. I assume the pistons included are stock comp ratio.

[GSXkid]

i am building a n/t 4g63 at the shop i work.i am using a 4g64 crank w/a 7 bolt block,2mm over 11.5:1 pistons,we have a web coustom grind cam set and a coustom sheet metal intake manifold.the intake was made just for the coustom head work done.taboo is right dont do to much porting to the head the already flow pleanty for a n/t. just clean up the mess. we are tring to make 250+ whp n/a

[Ozzmosis]

Originally posted by GSXkid
we are tring to make 250+ whp n/a

Sounds like a beast. I'm guessing the 11.5:1 pistons are custom made?