an update: I had it on the dyno today for about 20 min. Found that the rebuilt trans goes through all the gears and set the TV cable position lenght.
The dyno was not set to simulate load, just to allow the wheels to spin. So was not for hp output, that will be done at Carlisle in the spring. We just wanted to burn off alot of chemicals and oils from the new exhaust and wrap. Which really smells up the shop.
Checked out the block learn cells for fuel management, and reported to Rockcrawl on the findings.
The physical work is mainly done other than "cleaning it up" with water injection at/above 4 psi. As far as tuning, I suspect we are about 5% done-it runs
Could you please drop me a line at tdaniely@yahoo.com
I am very interesed in knowing more about this setup, as I just finished the 4.9L X-11 (http://home.attbi.com/~tdaniely/new_page_2.htm) and would like to try a turbo setup on my vehicle as well. I am good friends with Rockcrawl, so hopefully he's work with me on another chip
Also, check out my 3800SC Citation (http://home.attbi.com/~tmccload)
What I'd like to know is do you have all the photos you've shown in a higher resolution format ? If so, I can provide you with my FTP server's IP address so that you can upload the images. I'd like to keep a photo record of the turbo 4.9L
THANKS
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12:49 AM
Dec 30th, 2002
FieroGTT Member
Posts: 489 From: Hard Hittin' New Britain, CT Registered: Oct 2002
I'm getting anxious now. I leave for Canada on Wed morning. A 10 hour drive in the Cadero should be quite a trip! I still need to pack up all my programming gear and lots of extra EPROMs I can't wait to see what this car can do.
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09:17 PM
Dec 31st, 2002
westtexas Member
Posts: 404 From: Zephyr, Texas Registered: Mar 2001
Pete and Becky, you have my admiration. Some said this couldn't be done, good luck!
Robert
Thank you for the comment. I will get lots of pics once Jon gets here. And people make fun of how much I use my new digital camera . . .but at least it gives those who can't be here a visual of the project and and inside look at what is involved to do a 4.9 Turbo.
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01:03 PM
Her86GT Member
Posts: 1173 From: Ontario, Canada Registered: May 2001
Well, they got it home today. The gauge read just over 5 lbs boost and they said there was a difference in the torque off the line and all the way through. I'm not getting too exicted yet but I'm told it WILL work 100% come spring.
[This message has been edited by Her86GT (edited 01-04-2003).]
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02:43 PM
Jan 5th, 2003
PBJ Member
Posts: 4167 From: London, On., Canada Registered: Jan 2001
Well, we had a lot of hurdles to jump in not very many days. But we ended with some very good sucesses.
We drove a Turbo 4.9 MPI Fiero with just over 5psi boost on Saturday. The engine pulled great right from a stop like always. The biggest area of difference I felt was the latteral accelleration after especially higher rpm. Anyone who has driven a 4.9 Fiero has noticed that the engine has a huge jump from a stop and as the rpm goes up above high 3000 rpm its pull starts dropping. Well, not any more on Her86GT's Fiero. It pulls hard all the way until it shifts and when it shifts, it does it all over again smooth as can be.
Whats next? The ecm we have gone with to run the 4.9 is the faithful 730, with the use of a knock sensor and the abilites Rockcrawl has in adjusting acceleration and other fuel management tables. He has the vehicle set up preliminarily. Likely, he/we will have some fine tuning to do later when the weather is more suited for driving. As for spark retard, he has the attack rate of the ecm aggressive because with the 730 ecm, I will have to install a MSD timing boost controler to cut timing under boost before we have to rely on the ecm to attack detination.
The water injection system was hooked up for a couple of boosted acceleration, but it's too soon to tell if there will be any benefits at 5 psi.
Over all, "we did good". Mechanically it's done and needs "cleaning up" in appearance. Electrically, we can continue tuning when we have installed the MSD timing controler and when we can drive the vehicle in the warmer weather.
Thanks again Jon!!!
Pete
Ps. as for wiring harness, its all made from scratch using the factory connector ends.
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12:00 PM
Howard_Sacks Member
Posts: 1871 From: Cherry Hill, NJ Registered: Apr 2001
Hope everything works out good,your car is looking nice
------------------ 1986 Fiero SE www.2m6performance.tk Let me tell you what Melba Toast is packin' right here, alright. We got 411 Positrac outback, 750 double pumper Edelbrock intakes, bored over 30, 11 to 1 pop-up pistons, turbo-jet 390 horsepower. We're talkin' some fu*kin' muscle!
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03:19 PM
PBJ Member
Posts: 4167 From: London, On., Canada Registered: Jan 2001
Yes, the 730 uses the 1-bar map sensor but the add-on boost timing controller has its own built in map sensor. Fuel enrichment on the 730 was done with acceleration mode rather than map pressure.
Very happy to hear that you got a 5psi boost going on that engine. Much better then NAAWWWZZZ if you ask me. I think you'd probably get better gas mileage and emissions from this upgrade
What numbers do you estamate at the wheeles now? Just ball parked
What numbers do you estamate at the wheeles now? Just ball parked
~Steve-O~
The forum is not usually an estimate happy environment. I can only tell you that the pull does not drop off at all. So I don't want to even guess what the "numbers" are going to be at this time. I'm hoping to see over 200 at the rear wheels in Carlisle.
What made you choose the GM4? Did you have one laying around or do you think it was the best suited to the engine? It thought it was kinda big for the 4.9. So I guess now that the mechanical part is done, that means "The List" of parts and cars that went into this project will be released....right?
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01:27 AM
PBJ Member
Posts: 4167 From: London, On., Canada Registered: Jan 2001
I did have the turbo available, I also made some phone calls to find if this turbo was ever used on some gas engines. It has been used with good results on a 5.0L mustangs. Also the 6.5L engine is approx 400ci and redlines at 3500 rpm, the 4.9 is approx 300 ci and redlines at 4800 rpm, at wide open throttle at redline both engines are using the same amount of air-so I thought, lets try it.
As it turns out at maximum boost we were able to get is over 5psi, The boost came up and maxed out around 3000 rpm. We still need a better gasket on top of throttle plate-is blowing through. I suspect we will see 7 psi once ignition timing is finalized under boost and leak sealed. As for waste gate and control, is built in to 6.5 turbo housing and will have to be controled mechanically if I stick with the 730 ecm. So I will have to install a waste gate control actuator from a turbo dodge 2.2.
SO what I am saying, if you are trying to build a 4.9 turbo before this summer and you want more than 5 psi boost you will need to pick a different turbo or see if the 6.5 turbo has different head/turbines avail.
The deville crossover pipe was cut and custom turbo flange was adapted in. The turbo oil feed line is the stock 6.5 oil feed line. The oil return line is bulk high temp 3/4 inch hose to oil pan. Exhaust out is crazy custom-best of luck.
What made you choose the GM4? Did you have one laying around or do you think it was the best suited to the engine? It thought it was kinda big for the 4.9. So I guess now that the mechanical part is done, that means "The List" of parts and cars that went into this project will be released....right?
I could be wrong but...
The last thing a 4.9 "torque Monster" needs is a turbo that is suited better to low end performance. If he had went with a small turbo you would get a package that would merely aplify the low end grunt characteristics of the 4.9. If you read through his posts he says that power starts falling off the higher the RPM's get. The larger turbo will probably be able to offset this occurence.
Larger turbo's are more efficient than a small turbo that would spool quick and simply blow hot air. There's no real worry about lag , the engine makes more than enough power until the turbo comes online.
Just my 2 cents
JM
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09:38 AM
PBJ Member
Posts: 4167 From: London, On., Canada Registered: Jan 2001
Is the crossover pipe the only thing holding the turbo up? 5-7 PSI is really all I would go for anyway on a stock 4.9. I was thinking mainly of space constraints as well as price. The GM4 is a pricey unit. Does anyone know of a similar flowing yet less expensive or smaller unit? Are you using a compressor bypass valve?
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07:49 PM
PBJ Member
Posts: 4167 From: London, On., Canada Registered: Jan 2001
The turbo is held up by a 90 Deg bracket with the crossover triangulating for support and alowing movement of exhaust for expansion/contraction with heat. I am going to install/fabricate an adjustable pressure relief valve between the turbo and throttle plate.
The turbo companies I was talking with recommended a T4.