[auto99gt]

Recently new member. I have a 99 gt w/ automatic trans. Just made it to 164,000 miles. My plans are to build a badass n/a engine, and eventually forced induction. Along with upgrades to suspension, brakes,etc.

I've learned thro other threads that i need to upgrade the internals and if I do internals, ill do cams and heads to match. It's starting to burn oil, so im wondering if now is the time I should rebuild, before it g9es to far?

I also would appreciate some insight on my trans. Rebuild, upgrade( if any)? not sure what to do here.

[brharris777]

how is it burning oil, are you getting blue smoke and when and under what conditions, or are you frequently checking your oil and its disappearing faster than it should.

[BlkGt03]

with that many miles shouldnt you just lean towards getting new shortblock that can hold more power? and you would need to build the bottom end for the power. i would also say work on the rear end and getting a stall

[red02gt]

upgrading your internals has to do with building an enginge with forged steel parts because they are stronger. Forged crank and forged rods and so on

[DPower58]

Yeah, sounds like it is time to step into the performance spotlight... I would look into getting a racing block that will hold the ponies. Start from scratch and do it right, or if your on a budget... tear down your block and take it to a good machine shop and have it inspected so you can possibly bore it or something. as for the tranny, what I did is, went to a well known tranny shop and secretly asked a technician if he wanted to rebuild my tranny and put a shift kit in it at his house on the side for cash... he said he would as long as I drain and drop it out of the car and took it to him. Since he worked at the tranny shop he got a discount on parts. He was well knowledgeable and only charged me $250.00 to rebuild my C6 Trans... Clutches, bands, and all, including shift kit. It’s backed by a 302 with 351 heads pushing 350hp. I put a 2500 stall on it and have never had a problem with it... by the way I picked up the tyranny from a junkyard for $100.00 about 12 years ago...

[kyle2002stang!]

what kind of power are you looking for and whats your budget?

[auto99gt]

I've been told there's visible smoke when leaving a stop light. Just changed the oil yesterday, and it was low.

[auto99gt]

I'm lookin to break into 300hp range. Should stroke and compression be changed or not.

Already have 3.73s, want to upgrade diff and axles to 31 spline.

[auto99gt]

I'm lookin to break into 300hp range. Should stroke and compression be changed or not.

Already have 3.73s, want to upgrade diff and axles to 31 spline.

[nileppezdel77!]

Look into MMR, get a shortblock built. I'm in the same boat as you right now, so I started a savings account to put my extra pennies into; I'm looking at getting an MMR 900 stroker with a Boss mod block. My car has been sweating oil out the back of the engine for a while now, so I'm hoping that by the summer I can be replacing it. Good luck to you, though.

164k is a lot, good to know these things hold up fairly well.

[auto99gt]

I've looked into MMR short blocks and long bl9cks. they tell you how much horesepower they can handle, but i have not found where it says how much they produce.

[nileppezdel77!]

It's variable depending on you're options. A basic 900 shortblock is simply a regular 4.6 with forged parts, it won't make any extra power (it may make less due to excess weight of forged parts in the rotating assembly, but it'd be negligable). It's all about being strong enough for later stuff. A stroker is usually good for about 30 more hp though. Other than that, if you go for the long block you can get ported heads (or the trickflow heads) which would give you more power and a freer breathing car and cams which can be custom ground to your needs which will also give you an increase in power. Building a shortblock typically only nets you insurance that your car won't fall apart when you put more power into it.

[T-Lee. 30]

Originally Posted by auto99gt I've looked into MMR short blocks and long bl9cks. they tell you how much horesepower they can handle, but i have not found where it says how much they produce.

thats because they are built to Handle power blower, nitrous, cams etc. they are built to handle power alot better than the stock motor. Its not an out of the box high hp race motor its and out of the box built motor for you to upgrade with less risk of blowing something like your rods and pistons.

[auto99gt]

That's what I was thinking. Same engine, just can handle more power.

I'm gonna look into an mmr block to fit my needs and budget. Check out some trans kits and from there.

I read on one thread that you need lower compression for forced induction, but if I were to stay n/a, would higher compression be worth it?

[mrbigjeep]

if all your lookin for is numbers in the 3xx range then you can def. stay n/a and accomplish that. if you want 4xx then its forced induction time.

[nileppezdel77!]

If you want to be N/A, you basically need higher compression to make it worth it. You certainly will be able to break 300whp with stock compression, though. If you go 11:1 or something, don't think you can put a blower on later. It's monster N/A car or monster boost car, you can't really have both.

[auto99gt]

Thanks for the info

[roybrown45]

just find a lincoln mark viii and get the 4 valve out of it. they came with 300 crank hp, so it should be easier to get to 300rwhp than the 2 valve build. they can be found pretty cheap too.

[auto99gt]

Is that swap involve a lot of changes or fab work?

[XectriK]

Originally Posted by auto99gt Is that swap involve a lot of changes or fab work?

It's pretty close to a direct swap as you can get. There is a thread on here called something along the lines of "Infamous Mark VIII 4V swap" that has all the information you need for the swap.