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Search: Posts Made By: Grumpy
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Forum: DIY PROM
03-18-2007, 11:02 AM
Replies: 11
Views: 1,279
Posted By Grumpy

Your already at 160, you need to look at the min...

Your already at 160, you need to look at the min idle setting, or other possible problems I mentioned in your other thread.
Forum: DIY PROM
03-18-2007, 10:59 AM
Replies: 17
Views: 1,447
Posted By Grumpy

The first thing to do when tuning your car is...

The first thing to do when tuning your car is gathering info.. Yes, reading up on what others are doing is grande, BUT, often people fall into the mind trap if *A little is good more is better, and...
Forum: DIY PROM
03-18-2007, 10:48 AM
Replies: 6
Views: 912
Posted By Grumpy

Upon start-up the IAC should be at the park...

Upon start-up the IAC should be at the park position count.
Upon, RUN, that should stay the same, or slightly ramp to a lower number.

If 160 ain't enough, then you have a poor combo of IAC...
Forum: DIY PROM
03-14-2007, 04:48 PM
Replies: 9
Views: 696
Posted By Grumpy

There's no sense in trying to put together a temp...

There's no sense in trying to put together a temp tune. All it does is mislead your thinking, and sending you off on tangents.
Plus, none of your intial notes will mean a thing.
Forum: DIY PROM
03-13-2007, 09:02 PM
Replies: 16
Views: 1,374
Posted By Grumpy

You gotta problem. Your relying on the ecm do...

You gotta problem.
Your relying on the ecm do to ALL your idle control, and using a simple hammer/ bang, closed loop system to then try and fudge the AFRs, towards, AVERAGING a Stoich AFR. (you...
Forum: DIY PROM
03-12-2007, 07:23 PM
Replies: 16
Views: 1,374
Posted By Grumpy

First off, EGTs drop from being rich of lean of...

First off, EGTs drop from being rich of lean of Stoic..

If you want an well balanced engine, then you want 8 ecms, with an IR intake system, all running closed looped.

Getting 8 cylinders to...
Forum: DIY PROM
03-12-2007, 07:12 PM
Replies: 5
Views: 570
Posted By Grumpy

Only if you want to be somewhat serious, nothing...

Only if you want to be somewhat serious, nothing beats datalogging for seeing where you are, and where you've been like datalogging.
It'll be cost effective in engine life, and fuel savings.
Forum: DIY PROM
03-12-2007, 07:09 PM
Replies: 1
Views: 515
Posted By Grumpy

There's no need to reinvent the wheel, or play...

There's no need to reinvent the wheel, or play games hoping things will work, when you have sources like:

http://www.moates.net

Excellent support, and numberous guys using his products.
Forum: DIY PROM
03-07-2007, 05:53 PM
Replies: 24
Views: 907
Posted By Grumpy

Start immediately..... Gather the bits and...

Start immediately.....
Gather the bits and pieces, and start *tuning* on the stocker. It's MUCH easier to learn on a stocker, then try to get up to speed on unknown.

Get in get your feet wet,...
Forum: DIY PROM
03-02-2007, 09:05 PM
Replies: 3
Views: 662
Posted By Grumpy

Died from lack of anyone wanting to work on it. ...

Died from lack of anyone wanting to work on it. I thought it would make a nice joint effort project, but alias, no one really wanted to do any work.

If you want to do a boosted engine, IMO, the...
Forum: DIY PROM
02-28-2007, 08:40 PM
Replies: 4
Views: 717
Posted By Grumpy

When in doubt, replace it with a good GM sensor. ...

When in doubt, replace it with a good GM sensor.
The risks far outweight any advantage of trying to use a questionable O2 sensor.
Forum: DIY PROM
02-28-2007, 08:37 PM
Replies: 12
Views: 1,556
Posted By Grumpy

Forget the 730, and 749, go with the EBL. ...

Forget the 730, and 749,
go with the EBL.
It's got the proper coding for what you want to do, as is.
Forum: DIY PROM
02-28-2007, 08:35 PM
Replies: 3
Views: 795
Posted By Grumpy

Where you'd normally have the coil connected,...

Where you'd normally have the coil connected, instead use a 1K resistor and LED. Feed the ~1.5v from across the LED into the GM ignition module, ie where the reluctor would attack. With no other...
Forum: DIY PROM
02-26-2007, 07:57 PM
Replies: 42
Views: 9,124
Posted By Grumpy

Is there some on line pics of the 2 TB's (with...

Is there some on line pics of the 2 TB's (with the different IAC channels) you talk of?.

I *think* on of the things your seeing, with the warmer it gets problem, is due to the fuel being more...
Forum: DIY PROM
02-23-2007, 06:17 PM
Replies: 42
Views: 9,124
Posted By Grumpy

So the IAC just feeds through this external...

So the IAC just feeds through this external plumbing?.
What do you set the min idle speed at, using the butterfly?.

It's interesting......
Forum: DIY PROM
02-18-2007, 04:56 PM
Replies: 52
Views: 4,633
Posted By Grumpy

Got tables?. Some of us don't have the eyes of...

Got tables?.
Some of us don't have the eyes of the younguns. <G>
Forum: DIY PROM
02-18-2007, 04:54 PM
Replies: 14
Views: 1,003
Posted By Grumpy

Not bad. But, it's all so relative. NOX is...

Not bad.
But, it's all so relative.
NOX is also a real good combustion indicator.

Having the numbers stay so stable for light load to no load, looks good, IMO.
Forum: DIY PROM
02-17-2007, 06:38 PM
Replies: 52
Views: 4,633
Posted By Grumpy

How does it run?. Wavy is a human term, the...

How does it run?.
Wavy is a human term, the engine just knows what makes it happy or not.
If it runs correcty, that's what matters.
Forum: DIY PROM
02-17-2007, 06:36 PM
Replies: 9
Views: 953
Posted By Grumpy

If you were going to run 2-5 PSi you might get...

If you were going to run 2-5 PSi you might get away with pulling that off.
HOWEVER, timing is related to load, and the best place to sense what's going into the cylinder is as close to the intake...
Forum: DIY PROM
02-12-2007, 11:29 PM
Replies: 4
Views: 564
Posted By Grumpy

All the injectors in that era tie into just one...

All the injectors in that era tie into just one injector driver in the ecm. So it's all or nothing, with an ocassional nothing.

What can happen is low resistance injector overheats the driver,...
Forum: DIY PROM
02-12-2007, 11:22 PM
Replies: 7
Views: 799
Posted By Grumpy

Ya, keep the MAF system on the shelf in the...

Ya, keep the MAF system on the shelf in the garage, and go with a SD setup....

Or figure out the R/C on the input section of the 165, and then run a later model MAF. Prolly will need to do some...
Forum: DIY PROM
02-06-2007, 11:53 AM
Replies: 6
Views: 1,412
Posted By Grumpy

The 730, was an engineering exercise at GM. It...

The 730, was an engineering exercise at GM. It was an attempt to have the most universal ecm (within practical limits) possible. At the time of it's design it was ward winning.
The 165 was just...
Forum: DIY PROM
02-01-2007, 05:28 PM
Replies: 3
Views: 647
Posted By Grumpy

Obviously MAF, the give away is the movable...

Obviously MAF, the give away is the movable spikes in the intakes.

SD's would have screens there.....
Forum: DIY PROM
01-31-2007, 08:49 PM
Replies: 21
Views: 2,215
Posted By Grumpy

Your welcome, but please let's stick to using the...

Your welcome, but please let's stick to using the accepted terms, ie saturated.
----------


Yaaaa.....

But, I was addressing the folks here, and I'd venture a guess, that not too many guys...
Forum: DIY PROM
01-30-2007, 08:58 PM
Replies: 21
Views: 2,215
Posted By Grumpy

And without Ohm's Law you'd not have been able to...

And without Ohm's Law you'd not have been able to figure that out!.
Thanks, for proving my point.
----------


Put an ohm meter on one, or just do some research.

ALL SATURATED ARE 12-18 OHMS....
Forum: DIY PROM
01-29-2007, 07:12 PM
Replies: 99
Views: 4,406
Posted By Grumpy

Maybe if I repeat myself, some one will catch on....

Maybe if I repeat myself, some one will catch on.

Try looking at the code of say a, 95 S/C Pontiac 3800.
Forum: DIY PROM
01-29-2007, 07:02 PM
Replies: 21
Views: 2,215
Posted By Grumpy

If a stock TBI will run 2 TBI injectors that...

If a stock TBI will run 2 TBI injectors that would be the same electrical load, as 4 port type PnH (2.4 vs 1.2 ohms).
If you want to run more then 4 Port PnH you need additonal injector drivers.
If...
Forum: DIY PROM
01-29-2007, 02:30 AM
Replies: 10
Views: 892
Posted By Grumpy

Never overlook the obvious, are you absolutely...

Never overlook the obvious, are you absolutely sure everything mechanically is right?.

Might double check you IAC/ min idle setting.
Forum: DIY PROM
01-29-2007, 02:27 AM
Replies: 21
Views: 2,215
Posted By Grumpy

TBI, Peak and Hold Injectors are 1.2 ohms. ...

TBI, Peak and Hold Injectors are 1.2 ohms.

Port, Peak and Hold Injectors are 2.4 ohms.

Saturated in either variety are 12-18 ohms.

Just a FWIW
Forum: DIY PROM
01-15-2007, 12:59 PM
Replies: 2
Views: 579
Posted By Grumpy

Try adding a lil fuel. As the chambers get...

Try adding a lil fuel.
As the chambers get hotter, they *need* more fuel.
Too much timing can do it, thou usually, it's a matter of just being a lil lean.
Forum: DIY PROM
01-15-2007, 12:56 PM
Replies: 19
Views: 2,262
Posted By Grumpy

Seems like this thread is about everything OTHER...

Seems like this thread is about everything OTHER then tuning. If you want to tune and are using the old MAF stuff, well, good luck. Keep trying to tune with a pegged MAF, and fudging things around...
Forum: DIY PROM
01-15-2007, 12:47 PM
Replies: 3
Views: 698
Posted By Grumpy

It's not just a memcal change, according to some...

It's not just a memcal change, according to some notes I have.

If you go to www.tunercat.com you can see which ecms/ pcms what code will run in. Some of the late model trucks can use different...
Forum: DIY PROM
01-12-2007, 04:41 PM
Replies: 8
Views: 656
Posted By Grumpy

The stickies here, and there's a couple papers by...

The stickies here, and there's a couple papers by BobR, at the DIY-EFI FTP.
Forum: DIY PROM
01-12-2007, 02:30 PM
Replies: 19
Views: 2,262
Posted By Grumpy

You're biggest issue is going to be that MAF...

You're biggest issue is going to be that MAF based early system. There's a hundred threads where I've explained it's inherit problems.

Oh and a miniram has it's own set of issues.

Asking what...
Forum: DIY PROM
01-12-2007, 02:23 PM
Replies: 20
Views: 1,607
Posted By Grumpy

Given a big enough throttle body, any car would...

Given a big enough throttle body, any car would have an off idle *sag*.

Opening the throttle ~30%, gives you 60% of the cross sectional area of the TB. So air flow changes dramatically with a...
Forum: DIY PROM
01-11-2007, 06:03 PM
Replies: 3
Views: 836
Posted By Grumpy

Leaner is not always better!. One item often...

Leaner is not always better!.

One item often forgotten, is that it takes a given amount of energy to push a car/ truck down the road. So while you might change the amount of TPS for a given...
Forum: DIY PROM
01-10-2007, 08:39 AM
Replies: 20
Views: 1,577
Posted By Grumpy

Try looking under the driver's knees. There's...

Try looking under the driver's knees.
There's no real need to get too fancy, since your just going to be datalogging for set-ups, and not while racing. IMO, you don't want to preoccupy the driver...
Forum: DIY PROM
01-09-2007, 10:20 PM
Replies: 20
Views: 1,577
Posted By Grumpy

How much so you want to spend?. One answer...

How much so you want to spend?.

One answer is just piggy backing a later ecm, and sharing inputs (other then temp senders).
Tech trivia, temp sensors change pull-up resistor values, to expand...
Forum: DIY PROM
01-06-2007, 05:56 PM
Replies: 20
Views: 1,577
Posted By Grumpy

Might try the folks at KalMaker. They're an...

Might try the folks at KalMaker. They're an Aussie company.

The 165, and 808 are the same ecm, for all practical purposes. I beleive there is a one chip difference internally.
Forum: DIY PROM
01-03-2007, 07:27 PM
Replies: 5
Views: 1,365
Posted By Grumpy

Yes. There are voids of lean gases (between the...

Yes.
There are voids of lean gases (between the slugs of exhaust gases from cylinders having fired), and the ecm is toggling the injector pulse widths, to AVERAGE an AFR of 14.7:1.

A BLM of 108,...
Forum: DIY PROM
01-03-2007, 07:24 PM
Replies: 5
Views: 717
Posted By Grumpy

There are alot of variables, so without knowing...

There are alot of variables, so without knowing all of them, it's hard to say.

Closed Loop tries to maintain a 14.7:1 AFR.
As long as your running closed loop, and have resonable BL's, then there...
Forum: DIY PROM
01-02-2007, 05:30 PM
Replies: 43
Views: 2,150
Posted By Grumpy

Yes, an FMU is one answer, but if you attend any...

Yes, an FMU is one answer, but if you attend any meet where there's some serious turbo cars, you might see one or two per hundred cars.

As far as street manners with big injectors go, I've been...
Forum: DIY PROM
01-02-2007, 05:25 PM
Replies: 2
Views: 515
Posted By Grumpy

The trick is just getting it to sputter to life. ...

The trick is just getting it to sputter to life.
Sitting there just idling, ie under 2< or so, isn't going to instantly hurt anything is something is kinda lean or a lil too much timing. As soon as...
Forum: DIY PROM
12-31-2006, 02:48 PM
Replies: 39
Views: 2,578
Posted By Grumpy

Only because so many *experts* have posted...

Only because so many *experts* have posted *opinions* as opposed to Obert, and Heywood, who did the research, designed tests to prove their ideas, and documented what they did in a scientific manner....
Forum: DIY PROM
12-31-2006, 09:01 AM
Replies: 39
Views: 2,578
Posted By Grumpy

Being an acoustic devise, it's going to lick up...

Being an acoustic devise, it's going to lick up every noise, and if it's the right frequency, then the ecm is going to use that input as being knock.

You can fne tune the K/S by using different...
Forum: DIY PROM
12-31-2006, 08:55 AM
Replies: 39
Views: 2,578
Posted By Grumpy

Dinkin with these probably will get you what you...

Dinkin with these probably will get you what you want.
I say probably cause they can be a real exercise in patience to work with.
If you come up with a quick answer, 50/50 chance you went too far,...
Forum: DIY PROM
12-31-2006, 08:44 AM
Replies: 8
Views: 738
Posted By Grumpy

There should be a table with IAC Park Position vs...

There should be a table with IAC Park Position vs temp., try adding some IAC counts in the cold temp areas where you're having the problem. That should help with how far you have to press the pedal....
Forum: DIY PROM
12-30-2006, 01:48 PM
Replies: 3
Views: 522
Posted By Grumpy

The newer the ecm/pcm, and with few to little...

The newer the ecm/pcm, and with few to little mods., there's not going to be any huge amount of HP to be found. Generally, with the truck stuff thou, you can inprove drivibility a lil.

Without a...
Forum: DIY PROM
12-28-2006, 04:25 PM
Replies: 5
Views: 736
Posted By Grumpy

You have done well Grasshopper. Thou you double...

You have done well Grasshopper.
Thou you double posted the one URL?????
Forum: DIY PROM
12-28-2006, 04:22 PM
Replies: 19
Views: 980
Posted By Grumpy

If I could tell ya that, I'd be rich from winning...

If I could tell ya that, I'd be rich from winning so many lotteries.
Some people have a knack for tuning, and for others it's alot of work. I fell into the second group, I had to really struggle...
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