73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: Da67goatman on November 09, 2010, 07:14:53 pm
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How do I alter the ECM for more efficiency and mileage with my nonstock engine? Since its OBD-1, it seems there is nothing out there as far as a plug and play power tuner. I am terrible with technology, so the simpler, the better. Thanks guys.
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This should answer all questions.......
http://www.tbichips.com/ (http://www.tbichips.com/)
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Alright that helps, but I won't buy a chip from him, because his requires 91 octane fuel, not very economical, since efficiency and mileage are my goals. Thanks for the link, I did get the Data program, so it wasn't a total dud. It seems as though, its a one shot deal though, I get 1 tune and that's it. I would love to have 3 different tunes, one for economy, one for towing, and one that gives it a real rough idle, for car shows ;) I'll keep looking and post what I find.
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A chip can only change fuel delivery and spark timing right? So If you want to advance the timing you're going to need a higher octane fuel regardless.
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Wouldn't one of these work?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200539455547&viewitem=&sspagename=STRK%3AMEWAX%3AIT
I would really like this one, but only if it will work with my ecm.
I would have no problem with my truck thinking it was a camaro ;D
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=150517227022&viewitem=&sspagename=STRK%3AMEWAX%3AIT
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First, you need to realize these ECM's are ancient....They are the firs real attempt at fuel injection from GM. There is no way to program them, program them on the fly or manage them from an external source.
They use a PROM chip which can only be coded and then inserted.
With that said.....
Neither one offers the support you get from TBIChips.com.
The first one is a pre-coded chip. No changing the tune. TBIChips offers tweaks as needed.
Have you looked at Moates?
They have a build your own ECM that replaces/plugs in to the currrent ECM and allows you to program your own ECM.
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ALL performance chips require the highest grade fuel available. If you don't want to put 91 in it, don't get a chip as it will be pointless. Take my last car for instance. If I had access to 93 octane, I would have got an easy 15HP and 20FTLBS torque gain. With crappy CA 91 octane, my car never made the numbers it should.
Buy one from TBI chips. The guy is a TBI/TPI genius. You won't get that, or support from cheap chinese eBay chips. Spend a little more upfront for a better product. You will save in the long run.
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If you are nonstock now, how do you know you don't need 91 octane. TBI chips has a good rep and you only other option is to learn to burn chips yourself. There are several options on doing this, they do have ways to view info on the fly with them. the 747 is the most hacked ECM out there.
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I built this engine to run on 87 octane, efficiently. It has 9.5:1 compression, and a very small RV cam. Remember, this is my only vehicle, so any way I can make it perform better, without sacrificing Efficiency, I am looking into. Right now, I feel the factory tune, is not delivering enough power or efficiency since it is not designed to work with my modifications. I saw that Camaro chip with multiple configurations and thought it would be ideal for the versatility of my rig. I have a hard time with technology, so I ask and research as much as I can, but I can't decipher whats legit and whats a scam. I know some of you guys have played with TBI for longer than I've been around and those are the people I want advise from. The problem I run into is when I want the opposite of what is already out there and there is very little support when you go against the norm. I do appreciate the help, Thanks.
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TBIChips can give you EXACTLY what you want....
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9.5:1, small RV cam and I'm guessing iron heads? That's REALLY pushing it for 87 octane. I think around 9:1 is on the ragged edge and that's with like a 268h cam.
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TBIChips can give you EXACTLY what you want....
Yep, and I'm thinking of getting a custom chip for the citation. Here is something to consider. 91 is 20cents more than regular, right? Give or take. If you get 2 or 3 more mgs, you'll be doing about the same costwise. Factor in that you're running more efficiently and making more power it's still a benefit. Just a thought....
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I talked to Harris Performance (TBI Chips) and he just gave me a hard time when I told him what I planned on doing. I am sure if I just wanted a standard performance chip he would have shipped it today, but since my order requires effort, he would not cooperate. He mocked me about my plans instead of helping me. He refused to answer my last email. This is exactly what I get all the time, so I am used to it, but every time I go against the norm, no body is there to help. What happened to "the customer is always right"? So... anyone have another suggestion? Thanks.
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I am betting he gave you a hard time( in your opinion) because you want to run things that will not work well together, Such as 9.5:1 compression on 87 octane, with an RV cam for starters...
I would not want to "jump to put my name" on a package that is gonna run crappy, so why should they....
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9.5:1 compression and iron heads aren't a good combo when working with 87 octane.
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The only real way to tune an older OBD1 Vehicle is to get a pre-made Chip and just swap chips. you'll have to find a chip maker you think you trust and tell him as much about your truck as you can, leave out no details as far as the engine is concerned, and they'll take that and burn you a chip like you want. They used to sell "flip chips" that had a toggle you mount somewhere and had two tunes inside, you could switch between the two any time you wanted. My dad has one on his truck, on one setting its higher performance (you can feel it) and you have to run 91 octane in it. the other setting is basically stock. he has it like this so he's not stuck buying 91 octane when he doesnt want to.
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Well, I will tell you this, I am new to the Chevy world, but I have been around the euro VW/Audi BMW scenes for a LONG time. Working on and modding cars for a living, I would NEVER sell something under false pretenses, or sell my customers something I think would be problematic, or less then I would put on my own car. You should thank him. Seriously. He probably is frustrated, like most of us here, about a customer that wants his cake, and to eat it too. 87 octane and high good performance do not go together. If you are worried about economy, go get a Honda Civic. .20 cents on BOTH my 16 gallon tanks on my C10 is about the price of a burger from Carls Jr. Big deal.
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You can spend $350+ for custom tuning
Which consists of:
Burn a chip
datalog*
burn another chip
datalog
repeat till you get it right.....
Or you can do it youself with one of these
http://www.dynamicefi.com/
*datalog
http://winaldl.joby.se/aldlscreen.htm
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I have that program already, but have no idea how to use it. I know I am going to end up doing it myself, I always do, but I always ask first, just in case there actually is an easier way. I guess I'll take my truck and Laptop to the local college and get a group of students together and see if we college kids can figure out how to tune this old pig. Thanks guys.
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I really like this idea of doing it myself with this:
http://www.dynamicefi.com/EBL_Flash.php
Anyone ever used this before?
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I'm thinking about getting one for my 89 K1500 vs getting a over the counter chip from TBI Chips
I installed a fresh engine in it 6000 miles ago,
and just finished installing a new single exhaust on it.
Prior to the exhaust it will outrun my buddies 2007 F250 Powersmoke diesel from a 20 mph rolling start (1 truck length @ 70) and he's got the 60hp chip/tune whatever the heck they have for Fords. (it pulls better with the new exhaust)
I want to get all the engine mods in place before I attempt to tune it.
No use getting it tuned only to make changes to it, which would require re-tuning
The truck runs good now, but I know it could run better
At full throttle runs I'm getting steady 780mv at the O2 sensor with the new exhaust
with the true duals/glasspacks I was getting high 800's
All work is on hold till after the holidays
here's the build
TBI 5.7 2 bolt block
H345 +.030 pistons/ speed pro moly rings
ZZ4 balancer/ balanced stock rotating assembly
193 heads (ported) LT1 valves (new) Serdi valve job, decent valve springs, stock retainers and Felpre seals.
L98 roller cam/lifters/pushrods/ new Stamped 1.5 GM rocker arms
LT4 timing chain
Stock TBI intake
Ebay stainless shorty headers
Magnaflow Y pipe w/high flow cat
Thorley (Jardine) 3" single exhaust.
Stock (untouched) GM throttle body with unknown milage injectors
It idles so smooth you could stand a nickel on the air cleaner
I built for low end torque to pull my boat
After the holidays, I'll look into getting the Dynamic EFI unit
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Just go buy a carburetor. No chips, no technology, no problems. Once you learn how to tune them, they are cake.
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Just go buy a carburetor. No chips, no technology, no problems. Once you learn how to tune them, they are cake.
No problems? I know how to tune a carburetor but there are plenty of problems. A carburetor will never be able to outperform a computer for versatility and fuel economy. TBI is about as simple as EFI gets so if you understand carburetion you should have no problem with TBI.
Do me a favor - all of you guys who scrap your tbi systems for a carburetor, save them for me. I'll give you $50 bucks for them ;D
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Just go buy a carburetor. No chips, no technology, no problems. Once you learn how to tune them, they are cake.
No problems? I know how to tune a carburetor but there are plenty of problems. A carburetor will never be able to outperform a computer for versatility and fuel economy. TBI is about as simple as EFI gets so if you understand carburetion you should have no problem with TBI.
Do me a favor - all of you guys who scrap your tbi systems for a carburetor, save them for me. I'll give you $50 bucks for them ;D
I'll gladly hand them your way. I do not like TBI at all. I prefer Vortec spider injectors over the TBI units. Carbs are easily adjusted and maintainable. To each his own really. I do agree with the bold though.
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OK-
I'll take them ;D
CPI's were the most problematic GM ever mass produced
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What happened to "the customer is always right"?
As the owner of a small used car lot I have to tell you that in todays Lawsuite crazy world you cannot turn a proffit assuming the "customer is always right".