Hay guys ......
just got a Edlebrock intake and runners .... also a ZZ4 cam. What my question is ........

I can't do the prom tuneing ( way over my head ) and nobody is willing to slow down the lingo for a newbie so ....... by putting in this cam ........ will I need to increase my fuel delivery ? The way I would do this is to relocate to MAT sensor and Fuel pressure. Also with this setup ( other than headers and getting heads ) what else can I do to make this more driveable than I know it will be when I put all this stuff in the 305, IE more spark advance , MSD?

TIA

 

Stop Making excuses for yourself and learn to do it right.

 

I think that keeping your idle nice and steady will be the biggest challenge.
There are many ways to work on the idle while not messing with the computer programming.
One way is to take some control away from the ECM and IAC. To do this you can drill an idle hole in your throttle blades like the LS1 guys do when they add a large camshaft. This will steady the airflow at idle. Then you use the minimum air-rate screw to set your idle speed. Remember that you will have to readjust your TPS when you do this.

Another way is to go with an aftermarket adjustable vacuum advance distributor that is not computer controlled. This will keep the advance much more steady at idle and allow you to add more advance til it smooths out some.

 

Excuses !?! hmmmm at any rate


305sbc ...i apreciate all your input ....... nice to get a positve comment !

....Bort , I am afraid I am a " concrete " learner .... meaning I have to see it in front of me to learn it. I have contacted a friend on doing this but ...... It is just nice to know that some members feal the need to point out one's short comeings " Stop Making excuses for yourself and learn to do it right."

I would love to ...... I am trying but the lingo is a litlle tall for now


.... do you have anything to add other than #$%(* all

..... you know about this stuff .... yet contributed nothing

How the heck am I supposed to learn then

again 305sbc thanx for the advice :rockon:

 

D's89IROCZ: Why dont you look into it? I have started to burn my own proms and it isnt really as difficult as I thought.

I'm NO computer hacker and if you need help there is a alot of guys here that can assist you. I waited over 2 years before I got the PROM burning equipment and now I wonder why I didnt get it before..... Look at www.tunercat.com is a really nice software.

Here in Sweden its VERY difficult/impossible to get help I have to rely on the Web when I run into trouble......

 

I appreciate the comment. I will give it a try !

Off to prom burning school

I just got an encouraging PM that says I wouldn't have to learn as much of that deap theory as I thought. It was just discourageing ' cause this will be my daily driver ......I can't afford to be without it for a while . But now it doesn't seem too bad

Thanx all

 

hey man if ya really wanna learn about it go to www.iroczone.com there is some really good stuff there, and the members arent *******s about helping you like they are here sometimes, guess these guys with the knowledge are better than everyone since they know it and a newbie doesnt.

if ya arent gonna reply and help the guy, why reply just to chew his ***

 

Don't be intimidated by tuning. It's really not that difficult. Basically, it's like tuning a carb, but WAY more precise.

The basic values you'll be playing with are the VE tables and the spark tables.

The spark tables are the most straight forward. Basically, the ignition timing in the ECM varies with engine load (measured in manifold air pressure) and RPM. For any given operating condition (i.e. Load and RPM) there is a value for ignition timing that the computer goes for. For example, if you're running at 2000 RPM and you're at about half throttle (which is about 50 Kilopascals of manifold air pressure) the computer will go to the table and look up the timing value that is associated with those two engine values.

The fuel tables operate in much the same way. They very with manifold pressure and RPM just like the spark tables. However, the value for fuel that is displayed is measured by the volumetric efficiency. Basically, you estimate the volumetric efficiency of your engine at any RPM and MAP and enter that value in to that spot in the table. For example, for a TPI engine at full throttle and 3200 rpm, everyone knows that the torque is incredible (it's been said that the torque curve and VE curves follow eachother pretty closely) so you can reasonably assume that the VE at that condition is pretty close to 100%.

If you're not that familiar with VE, it's basically a measure of how much air an engine is able to take in; when you compare the air pressure at the end of the intake stroke vs the air pressure of the outside air. The closer you get to 100% VE, the better the engine is breathing.

Other tables in the ECM are very easy, like idle speed vs coolant temperature, spark timing at WOT; while others are a little more difficult. But once you get into it, make small changes and always save your previous calibration in case you make a mistake.

Hope this helps.

 

10 years ago, I spend several years trying to figure out mechanical answers to software problems. Very few worked. In a way it was a tremendous waste of time. that's when I got into Prom Burning, and there is just no comparision.

snag a copy of tuning tips from Incoming at the DIY-EFI.org site and see if that doesn't help.

If you can 1/2 way operate a PC, you can handle prom burning, just takes some learning.

 

If the terms people here use are beyond you, then ask some ?? and tell them to "dumb it down" a little (not saying you're dumb, just an expression) If no one ever speaks up to say they don't understand what is being said, then everyone assumes you do understand....understand?

 

I can understand what hes saying tho about the initial intimidation involved in starting your own prom burning...

I am lazy - I am in a similar boat except noone can say I'm making excuses, cause I am not. Like I said: I'm lazy.

So, if you're like me and you are lazy, then talk to Ed Wright at Fastchip.com and see if what he thinks. Surely it is always desirable/ideal to have the car THERE by the Dyno. However, he can still net significantly more driveability/power useage than say your stock Prom...

 

Hay that totally made sense Pro-Tour71

I have to reasearch more about where my cam is going to make power ( ie datalogging) before I state where 100 % VE is hapening in my RPM range <-------- does it sound like I get it ( a little)

Grumpy , I didn't know you tried the same route ( fooling the ECM) I figured it was a quick and easy fix for a cam and intake swap. But I know know the tuneing involved for maximum performance faaaarrrrr outdoes any sensor relocation or disrtibutor twisting I can do ...... ps thanx for the link

90iroc 5 speed , I already am a member there . Same nick too
thanx for the advice.

Morley thanx for the advice , I will not hesitate to ask for the "easy explination"

thanx again all for all the help ....hopefully I can pass the same valuble help along sometime