Anyone use the 950 for speed density TPI.
Will it plug directly into a painless TPI harness?
Is the 950 windows based and user freindly?
Im installing this setup into a carbed non
emission vehicle

 

No the commander has its own harness and sensors that Holley makes. They do make a TPI kit that accepts GM sensors but it still has its own harness. Call summit I think the part number is 950-101...the universal setup I think is 950-109.

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Matt
87 GTA LB9
Spohn LCA's and relocation brackets
WS-6 suspension
Spohn Adj. Panhard
Spohn Adj. Torque arms 1 deg. preload
Spohn Subframe connectors
Edelbrock Strut tower brace
Eibach springs lowered 1"
KYB all 4 corners
Energy suspension bushings in rear and PST front end kit
Currie 9" 3.70 posi rear
automatic
no times yet

 

i need help tunning my comander 950. i read something on here a little while back about auto tune? any help would be great. its the only thing keeping me from driving her again. its been to long. please help. lol.

 

RGS have you purchased the 950 yet?

Speed Freak, try this
http://www.efi101.com/forum/viewtopic.php?t=3857

But it doesn't work like the newer versions and the 950 isn't the best driving system depending on engine mods. It's a total batch fire like the original TPI and has it's limitations.

Hope this helps.
Mark

 

thanks mark. i have had the 950 since it came out. it was one of the first made.

 

You're welcome Speedfreak.

Althought there are many here that I'm sure have run the 950 successfully, without knowing the extent of your engine mods please keep 1 thing in mind.
Being a total batch system it's ability to fine tune is limited.
Case in point, I have sold and tuned numerous Accel systems to the U. of No Carolinas engineering dept.
Holley donated a 950 along with the Stealth ram intake. After hours on their very sophisticated dyno they dialed it in as good as possible. The motor was a mild 350 making about 300hp.
Then they switched the electrics to an Accel Thruster. As expected peak hp was similar with the Accel besting the Holley by only about 4-5hp.
However the midrange was another story. As with anyones progammable sequential system, the Accel showed marked increases throughout in hp/tq to the tune of close to 30lbft and 25hp, all while using less fuel.
What they found with a total batch system was that 4 of the cylinders would remain close in air/fuels. However they always had 2 that ran leaner than the rest and 2 that ran richer. Not hard to figure out that that was due to those injectors being fired at exactly the wrong time in relation the rest.

For an average hp'd application it'll be fine, certainly better than a carb. But for anything else, the further up the hp scale you go the further behind a total batch fire will be.

 

why not just get a used SD harness from on here and then repin it for the holley.

I havent used the 950c (have one sitting here on the shelf in my garage im running $59 code instead) but I do know people who are and like it. Marty from the here has been running one for years with a twin trbo355 http://www.youtube.com/watch?v=TMTBhM0vV3w and been deep into the 9's along with being very streetable. https://www.thirdgen.org/forums/powe...bo-88-gta.html

Id agree if your loooking to really squeese EVERY single hp/tq $ you can then seq. would be the way to go. Swap to the LSx ecm and harness.

 

The 950 is a great all around EFI unit. Lossing HP because it is batchfire is complete misinformation. I have tuned some extremely wild combination and never been limited by the fact of having individual fuel trims or not.

My GTA and corvette both run the 950. THe vette 12.0 at 118 miles an hour on All Season Radials. The bird has never been on a dyno or the track, but it has no problem running things down.





This is not my first time to the EFI rodeo. What have found makes a good EFI unit is the ability to have adjustemets that are easily understood for adjustment, and I think the C950 and the newer Holley stuff has that in spades. You can usually find a tabled named right after the adjustment you want to make. And to make it better the system works on the fly and loads fast and easy.

Try using Edlebrock Pr Flo and then use the Holley You'll understand what I mean. On Eddy's setup if you wanna run boost you have to calibrate your own map sensor in Eddy's units which is positve inches of Mercury????

Here is a Contauch I did a while back with Electromotive. It had individual cylinder trim that did not amount to much as the the software was cryptic and lack the adjustments necessary to make the number of changes it takes to get one of these beasts street and idle friendly many comprimises and tricks had to be used to get it were we wanted it.







With all that said, were is the original poster located. If your near by I may be able to help you. In the mean time it is critical that your motor is mechanically set up right. Check the following:

-Does you initial timing match whats programmed into the 950
-Is your map sensor working properly? At idle it should be in the 30-50KPa range and when you rev it it should trend rapidly toward 100kpa
-It is best to start with one of the flashfiles they already have, that closelys matches your combo, but this can cause issues with the temp and warmup modifying tables. If that is the case these need to be zeroed out untill timing and VE is solid.
- A wide band gauge will save you a tone of time, and if you wire the wideband into the Holley it is extremely helpful as you can set the 950 to command AFRs at given load and RPM with set fuel correction.

The TPI connectors for the 730 ecm and the 950 are the same, you will need to repin them though. THe 950 is not that difficult to wire it has minimum sensors. The book tells you how to hook up each one.

 

And I agree with the rest of your reply, not an Edelbrock or Electromotive fan either.
But really, unless you're able to do back to back tests with no variables other than the ECM's, it's your word against whoever.

Have a great holiday weekend gentlemen.

Thanks
Mark

 

my main problem right now is finding a laptop that the programs can run on and hook up to the c950. i live in southern ky. looks like its about 12 hrs away. lol.

 

specs. - 1991 Trans Am GTA / WS6 .... .060 over 4 bolt main 350 with forged pistons ( short block was built by Speed-O-Motive ) with a slp camshaft ( 224/230 duration @ .050" - .502/.510 lift ), roller lifter's, comp roller rocker's, crane double roller timing set, edelbrock center bolt performer rpm aluminum heads ( .202/ .160 valves w/ 60cc chambers ), fully ported & polished holley stelth ram intake( ported by total engine airflow ),holley 52mm throttlebody,26# fuelinjectors(ford svo), hooker super comp LT headers, holley commander 950 computer,msd 6AL,nos plate system, Mad Dog 700r4 tranny with 38k stall,stock WS6 suspension

 

No disrespect taken. THese are good questions. Have I run back to back systems on these cars, and yes is the answer. The vette and firebird ran 730 ECMs at one time, Then the sequential 7427 Buick Grand national which is sequential then the vette ran a 411 LS series ECM. They all were within 5 % peak power. The fastes times at the strip with the vette have been with the 950. I attribute to the fact i have access to the changes I exactly need.

The accell is a decent system. The menus exist and are usefull. The gen 6 I used had a clunky interface with me and the car. I was just tuning a basic SBC TPI in a Grand sport clone 63 vette.

We used to test multiple units on our Formula SAE car. With 4 cylinder bike engines on restrictors batch versus sequential can make a difference. The smaller more high strung and engine is the more this comes into play. Over whelming a small displacement motor with fuel can slow it down. Once you get past 2.0L Mechanical momentum starts to be your friend and you are able to consume extra fuel here and there with out snuffing out performance.

Sequential can gain you viable returns on fuel economy.


As for the original poster
What laptop do you currently have? I have run the commander 950 on every thing from windows 95 to Windows 7. On the newer laptops what you need is a PCMIA card to serial. This will give you the correct hardware abstraction layer that the commander is looking for. That is the 950s downfall and upfall. I has a significant serial interface that is really robust. Unfortunately serial is getting dated. The new holley HP has a great USP interface as well.

Like I said if you get that card it will fix you right up, and if you wanna send me your tune I can take a look at it. My old man lives in Clarksville, So ther may be a chance we could meet. I will be there for Power TOur, but Iimagine my dad and all his buddies will have me tapping on the key board trying to eek out their last little performance gains for the tour.

 

Absolutely, wouldn't argue that for a minute, But that wasn't my claim, midrange torque and consequently drivability was what I was after. I still think/know the better/sequential systems are head and shoulders above a total batch fire in that respect.

Jmo.