What FI is BesT??????????
Thread Starter
Instructor
Joined: May 2008
Posts: 171
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From: Newportville PA
What FI is BesT??????????
I really need to know what FI system is best and will look the nicest in my 1973 vert. I really like that Holloy FI it really is a work of art!! Will this fit under a factory hood?
What FI system will fit under my factory hood?
Did anyone install the Holloy in their c3? I was thinking about going with a mass flow FI system.
So which FI is the best for this zz383???
http://massfloefi.com/
Edelbrock Performer RPM Pro-Flo2
http://store.summitracing.com/partde...5&autoview=sku
ACCEL DFI Street-Ram Fuel Injection Systems for Small Block Chevy
http://store.summitracing.com/partde...5&autoview=sku
Holley Commander 950
http://store.summitracing.com/partde...5&autoview=sku
Holley Stealth Ram MPFI
http://store.summitracing.com/partde...5&autoview=sku
Thanks!
What FI system will fit under my factory hood?
Did anyone install the Holloy in their c3? I was thinking about going with a mass flow FI system.
So which FI is the best for this zz383???
http://massfloefi.com/
Edelbrock Performer RPM Pro-Flo2
http://store.summitracing.com/partde...5&autoview=sku
ACCEL DFI Street-Ram Fuel Injection Systems for Small Block Chevy
http://store.summitracing.com/partde...5&autoview=sku
Holley Commander 950
http://store.summitracing.com/partde...5&autoview=sku
Holley Stealth Ram MPFI
http://store.summitracing.com/partde...5&autoview=sku
Thanks!
Melting Slicks
Joined: Mar 2007
Posts: 2,100
Likes: 12
From: Frederick Maryland
I have the Edelbrock Pro-Flow RPM installed in one of my cars (not a Vette...an Avanti). It's excellent...smooth and powerful system. The only negative I can say is the electric fuel pump is on the loud side, but I've been told most similar systems all have the same characteristic.
Whether it will clear a stock Corvette hood I don't know, but I did have to have my chosen air cleaner modified for clearance under the sloping hood. I had other options for an air cleaner system, but I was able to have what I wanted.
I have no experience with the other brand EFI's you mentioned, but I'm sure they're all fine systems. Each likely has strong points over the others. Since you have a stroker, I guessing it probably has a pretty healthy camshaft. You should get the cam specs and make sure each EFI is compatible...not all are compatible with extreme cam profiles.
Whether it will clear a stock Corvette hood I don't know, but I did have to have my chosen air cleaner modified for clearance under the sloping hood. I had other options for an air cleaner system, but I was able to have what I wanted.
I have no experience with the other brand EFI's you mentioned, but I'm sure they're all fine systems. Each likely has strong points over the others. Since you have a stroker, I guessing it probably has a pretty healthy camshaft. You should get the cam specs and make sure each EFI is compatible...not all are compatible with extreme cam profiles.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
This is a post that is a little old but has some good info on FI. I like the Mass Flo system.
http://forums.corvetteforum.com/show...fuel+injection
http://forums.corvetteforum.com/show...fuel+injection
Burning Brakes
Joined: Mar 2005
Posts: 1,139
Likes: 0
From: Salina Kansas
I had the Edelbrock proflo efi setup fitting under my '76 L82 hood with a drop base moroso air cleaner (the older Proflo setups). The new ones look to be the same intake. Intake was 5.75" front and rear, TB was 2.25", and I had a .5" aircleaner spacer on it. Air cleaner barely cleared the bottom of the hood on the front.
FAST also makes a complete kit now and it looks like they use the Edelbrock 'EFI' intake from what I can see. Not sure how much it is though.
I currently have the FAST xfi computer with a solid roller 427sb and a ridiculous amount of money messing with intake setups, finally went with a custom Motown. Most setups will probably work fine on your 383, but I would read the below article.
Her is a great link comparing intake setups for efi.
http://www.compcams.com/Community/Ar...?ID=1737510521
Attached is a pic of my new intake setup that should be done next week.
FAST also makes a complete kit now and it looks like they use the Edelbrock 'EFI' intake from what I can see. Not sure how much it is though.
I currently have the FAST xfi computer with a solid roller 427sb and a ridiculous amount of money messing with intake setups, finally went with a custom Motown. Most setups will probably work fine on your 383, but I would read the below article.
Her is a great link comparing intake setups for efi.
http://www.compcams.com/Community/Ar...?ID=1737510521
Attached is a pic of my new intake setup that should be done next week.
Burning Brakes
Joined: Mar 2005
Posts: 1,139
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From: Salina Kansas
Burning Brakes
Joined: Feb 2006
Posts: 1,173
Likes: 5
From: Paducah Ky
I am not sure which Holley system you are asking about anyone installing but I have a modified stealth ram intake with an Accel computer. It definately will not fit under a stock hood. It barely fits under a L88 hood 
The link Dave posted above shows this setup supporting a healthy 383 in thier test. Mine has been opened up through the entire runner, port matched to felpro 1206 intake gaskets, and knife edged at the dividers. I wish that I had flow numbers to see what improvement this made.
The link Dave posted above shows this setup supporting a healthy 383 in thier test. Mine has been opened up through the entire runner, port matched to felpro 1206 intake gaskets, and knife edged at the dividers. I wish that I had flow numbers to see what improvement this made.
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Drifting
Joined: Sep 2006
Posts: 1,986
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From: Columbus MN
Pro
Joined: Oct 2002
Posts: 733
Likes: 15
From: Clarksburg NJ
My Stealth Ram fits under the factory hood on my '76. (Without the insulation, and removed one insulation "post". It's tight, but it clears. The more I look at that setup though, appears to be an 80-82, based on the hood latches, which would be a smaller hood. Very nice though!
Last edited by TPIShark; Jun 20, 2008 at 08:10 AM.
Burning Brakes
Joined: Feb 2006
Posts: 1,173
Likes: 5
From: Paducah Ky
Actually, this is a 77. I don't know what is different but I don't see how this would fit under the stock hood. I only have about a half inch of clearance above the throttle body and it sits under the raised part of the hood.
Team Owner
Joined: Apr 2002
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From: All humans are vermin in the eyes of Guru VA
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Drifting
Joined: Jul 2007
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From: Tampa FL
Last edited by Ron R; Jun 20, 2008 at 10:24 AM.
Thread Starter
Instructor
Joined: May 2008
Posts: 171
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From: Newportville PA
Well I guess the Holly Stealth Ram is out because I do not want to change the hood.
Will the ACCEL FI system fit under a stock hood?
I really want a pretty FI system but is these above 2 wont fit under the stock hood I will go with the massflo to be on the safe side.
What do you guys think?
I am about to start ordering parts next Thursday!!!
Thanks
Julius
Will the ACCEL FI system fit under a stock hood?
I really want a pretty FI system but is these above 2 wont fit under the stock hood I will go with the massflo to be on the safe side.
What do you guys think?
I am about to start ordering parts next Thursday!!!
Thanks
Julius
Burning Brakes
Joined: Mar 2005
Posts: 1,139
Likes: 0
From: Salina Kansas
I haven't heard much about the massflo other than it isn't as perfect as they say it is in adjusting to any motor and you do have to do some programing with it. Do they sell a kit? I would really look at any kit's intake manifold, throttle body and injector configuration before you buy it as those can be seriously limiting factors if you ever upgrade. Also, how versitile is the ecu that comes with the kit, can it use low impedance injectors for example? High impedance injectors stop at about 44-48 lb I think and then you are stuck. Does the kit have an adjustable fp regulator?
If your going with a 383 that Holley stealth ram seems like a good setup if you can get it to fit, I think they look cool as heck too. Ported, they are supposed to flow enough for 600 hp (300 cfm+) so that would be good for a future upgrade motor more than likely.
The only limiting factor to the Edelbrock proflo setup (old one) that I had was that you couldn't program it with a computer to adjust for major engine upgrades, but the new one can.
If your going with a 383 that Holley stealth ram seems like a good setup if you can get it to fit, I think they look cool as heck too. Ported, they are supposed to flow enough for 600 hp (300 cfm+) so that would be good for a future upgrade motor more than likely.
The only limiting factor to the Edelbrock proflo setup (old one) that I had was that you couldn't program it with a computer to adjust for major engine upgrades, but the new one can.
Drifting
Joined: Sep 2006
Posts: 1,986
Likes: 21
From: Columbus MN
Interesting ... are there jets available for motors that make over 540 HP? No matter what I do with the floaters in the Holley I still shut down on a hard turn every once in a while. Never had that problem with the Quadrajet on the stock motor, but I'm not going to get the same HP if I put the Qjet on my 383. I'd like to do more autocross but the possibility of the carb causing me to shut down is preventing it. I've adjusted the thing like a million times, seems like its either too much or not enough. For the 950 I saw some injectors that said 450 HP, but the only higher ones I found were for 650 HP 540's. I'm already running an electric fuel pump, I'd love an EFI setup where I could just pull the carb, drop it in, and start her up.
Burning Brakes
Joined: Mar 2005
Posts: 1,139
Likes: 0
From: Salina Kansas
Let me say from my recent experience that the preprogrammed maps are almost worthless unless your motor is nearly identical in every way to the motor the map was programmed for. Cubic inches, compressoin, cam, injectors, intake, heads, everything. One change and it starts throwing things off, I am guessing.
For example, there were two different 427 ci maps with my FAST setup and I tried both and neither one did anything but sputter, barely run at 2500 rpm, foul the plugs and foul the O2 sensor. I'm sure someone experienced in tuning could start from such a map, but me...no way. I trailored it to a guy that spent a couple hours getting it running right.
Now that I keep changing things, I keep going back and spending more and more money. I really need to start learning to tune this thing...
For example, there were two different 427 ci maps with my FAST setup and I tried both and neither one did anything but sputter, barely run at 2500 rpm, foul the plugs and foul the O2 sensor. I'm sure someone experienced in tuning could start from such a map, but me...no way. I trailored it to a guy that spent a couple hours getting it running right.
Now that I keep changing things, I keep going back and spending more and more money. I really need to start learning to tune this thing...