Holley Commander 950 MPFI
Thread Starter
Race Director
Joined: May 2002
Posts: 14,376
Likes: 1
From: Check this riff........
Holley Commander 950 MPFI
Anyone used one of these? I have lots of experince with the 4di throttle body, but some guy near me is selling a MPFI for chevy big block and I was thinking about doing it to my 68. I already know about fuel lines and the wiring harness etc, I was specifiaclly curious about the MPFI and the 950 computer interface compared to the throttle body 4di.
thanks,
thanks,
Thread Starter
Race Director
Joined: May 2002
Posts: 14,376
Likes: 1
From: Check this riff........
Re: Holley Commander 950 MPFI (zwede)
JEEEZZZZ :eek: Great writeup!!! We choose the same spot for the electric fan relays. :yesnod: My heads are rectangle port, I wonder is holley makes a retangle port manifold? You hit a lot of the same issues I hit when I installed the 4di on my 76, but you sure did it alot more professional.
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
Re: Holley Commander 950 MPFI (BigBadOrange)
Thanks. :) Yes, Holley makes a rectangle port EFI manifold. You can find the PN on their website. Make sure you get the right size injectors (probably 42lbs, they're good for about 600hp), and the right style pump (they have in-tank and in-line).
Le Mans Master
Joined: Aug 2000
Posts: 6,362
Likes: 7
From: Brazos TX
Cruise-In IV Veteran
Cruise-In V Veteran
Re: Holley Commander 950 MPFI (BigBadOrange)
I have the system on my small block and I really like it. Tuning with the laptop is great. Overall I think it is a very good product.
Zwede, I haven't forgotten about sending you my maps. It's just that I haven't tweaked them very much because the engine is still out of the car. Once I get a couple thousand miles more on it I'll send them to you.
Zwede, I haven't forgotten about sending you my maps. It's just that I haven't tweaked them very much because the engine is still out of the car. Once I get a couple thousand miles more on it I'll send them to you.
Team Owner
Joined: May 2001
Posts: 29,745
Likes: 3
From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."
CI 6-7-8 Veteran
CI-VIII Burnout Champ
St. Jude Donor '06-'10, '13
Re: Holley Commander 950 MPFI (burners)
I am running the C950 with a throttle body system (damn emissions board would not let me switch out intakes and go with a MPFI).
The C950 system is awesome. Saturday I was driving, still getting things mapped. The car started to puke and die, I looked over at the laptop and saw that it was waaaaay too lean. Added fuel with a few keystrokes and pulled back on the road.
The C950 system is awesome. Saturday I was driving, still getting things mapped. The car started to puke and die, I looked over at the laptop and saw that it was waaaaay too lean. Added fuel with a few keystrokes and pulled back on the road.
Instructor
Joined: Dec 2003
Posts: 127
Likes: 0
From: Austin TX
Re: Holley Commander 950 MPFI (BigBadOrange)
I'm about to buy a StealthRam kit for my '75. I'm hoping that it fits, though I need a new hood anyway. Dennis @ Fonse is hooking me up with 50lb injectors and I'm also buying an ATI Procharger P-1SC kit to go with it.
The price difference between the MPFI and StealthRam is negligible and everyone raves about the StealthRam.
600HP here I come!
:)
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Holley Commander 950 MPFI (phungus)
I'm about to buy a StealthRam kit for my '75. I'm hoping that it fits, though I need a new hood anyway. Dennis @ Fonse is hooking me up with 50lb injectors and I'm also buying an ATI Procharger P-1SC kit to go with it.
The price difference between the MPFI and StealthRam is negligible and everyone raves about the StealthRam.
600HP here I come!
:)
The price difference between the MPFI and StealthRam is negligible and everyone raves about the StealthRam.
600HP here I come!
:)
Def document your build since that is exactly what I have in mind. I have a forged 383 crank earmarked for the project but it is going to be a couple of years until I am ready. The supercharger set is the only thing I am unsure of.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Instructor
Joined: Dec 2003
Posts: 127
Likes: 0
From: Austin TX
Re: Holley Commander 950 MPFI (Fevre)
You stole my idea! :mad :jester
Def document your build since that is exactly what I have in mind. I have a forged 383 crank earmarked for the project but it is going to be a couple of years until I am ready. The supercharger set is the only thing I am unsure of.
My block is a fresh 355 build with a GM 442 crank, 5.7 rods and KB Hyper 9:1 pistons. Comp 280H cam and 487X 76cc heads currently being ported and blended. I'm going with the P-1SC because it's self-contained and should be quieter. It's around $2100 for a base carb kit. I just have to adapt it to the LT-1 style intake.
I'll be sure and take some pictures.
Jeff
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Holley Commander 950 MPFI (phungus)
I might get a used s/c for my Formula and see how it sits in the vette eng bay. If it works I'll use it, if not I'll stick it in the Formula.
