Alright guys, I have a 94 Z28 M6, over the winter (2010-2011) I put in a 355 that has a GM-847 cam and stock heads/intake that were just cleaned up. no p&p at all. The car runs and drives great, it is untuned on 3:42's. Breathing through BBK shorties and a stock y-pipe with the cat removed. I know a jumbled mess of crap(flame suit on). But the motor is coming back out, the oil pan gasket had a defect when it was made(idk how the **** I missed it) so I'm pulling the motor once again to fix that, but while it's out I'm doing LT's and some sort of true duals, I should've done it the first time I just got in a hurry. But while I'm gonna have the motor out I wanna have the heads/intake done up. Ported and polished. So I was wondering who does it best/cheapest? I'd rather not ship them but I'm sure I'll have to. I'm in Kansas City, Missouri and drive to Lake Ozark and St. Louis a lot so anywhere around there would be nice, if not oh well I'll ship it. I'd just like to meet the person doing the work and be able to check on things.
Btw, I don't see how people say this cam is not good on the street. I get 26mpg hwy and 17-19 city. and can shift under 2k and be fine with the a/c running. I'm on 3:42's still..

 

You're pulling the motor to change the oil pan gasket when it can be done in an hour in the car?

 

You don't need to check on the pro working on the heads if you ship them to elliot portworks.com. Lloyd elliot is the **** when it comes to lt1 ls1 heads and affordable.

 

Well, it's a combination of that and wanting to do the heads and intake lol. Plus, I was in a rush to put it all back together since my DD (99 Camaro) spun a rod bearing. So I wanna pull it out again and do the exhaust, heads, intake and paint the engine bay and some wire tucking. Just to clean it up.

I've heard nothing but positive things from him lol. I think I know where I'm going..

 

So it is untuned with 3.42s with an M6, you have MUCH more important things to worry about than head and intake work.

 

Why would I worry about a tune when the motor is coming back apart for pretty big changes? And I'm keeping 3:42's. I drive a lot on the highway and enjoy my 26mpg.

 

We went through this in detail within the last two weeks, you are wrong about the 3.42s being responsible for your fuel economy. They keep you from effectively using 6th at reasonable speeds. Lugging an engine is NOT good for it.

Use a gear ratio calculator to EDUCATE yourself on just what the .50 D does for cruise rpm.

Beyond that people mistake higher rpm for causing mileage losses at high speeds when in reality it is aerodynamics.

With a 93 T56 I could see an argument for 3.73s since it has less OD.

 

I can use 6th at 40 with as much throttle pressure as I would at 80 in 6th. Lol, I don't ever have to "lug" it. Anything under 40 and it starts to.

 

I love how off topic this is now lol. but anyway anymore places for heads?

 

Tell you what, if you think 3.42s and an 847 cam are an appropriate match, you should not be modding the car.

Now go ahead and cry about that being off topic but that will just prove you want blind confirmation of your ideas rather than useful advise.

 

Indeed. I had 3.73's with an 847 and 6th gear was rendered useless. Couldn't imagine what it would be like with 3.42's.

 

Not sure why your being ignorant, I asked for help on heads/intake. NOT gear selection. I know how my car drives, and I can pull up any hill in 6th at 40mph with no "lugging" it does fine.

How? Read my previous posts. My 6th pulls fine, as if it did stock.

 

Just last night
i got a PM from someone with a shorter duration cam than yours that said 3.73s to 4.10s made a huge difference.

Meaning you are just looking for blind praise not help.

 

I think I may have 4:10's already..
I'm not the original owner. It had just a cat-back. And the stock intake was mangled meaning it could have been on..off a numerous amount of times, thus making car very driveable.. What rpm should I be at in various gears?

 

Jack the car up and put a piece of tape on the drive shaft. Count how many times the DS makes a complete circle when you turn a tire one full rotation.

That will be your rear end ratio.

 

Thank you sir.