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Username Post: A Dynamic EFI Computer on a 383 Stroker        (Topic#256998)
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-03-11 02:51 PM - Post#2041603    

Well Last year I had a 383 Stroker built locally. Its a roller engine and has ran flawlessly for the past year. It runs well with the Holley 670 CFM Tbi on it but only 14.5 PSI.

I am adding the Dynamic EFI Flash eprom set-up plus a New TPS and Fuel Pump that delivers 190 LPH to give me a consistent 22-24 PSI at the TBI. I just got a new laptop to interface with the computer. I will let you all know how it goes and if there are any suggestions I'm open.

http://www.dynamicefi.com/

Scott

Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


Edited by Skerlock on 02-03-11 02:55 PM. Reason for edit: No reason given.

 
Low priced Genuine GM Auto Parts
someotherguy 
Moderator
Posts: 25872
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-07-11 03:51 PM - Post#2043294    
    In response to Skerlock

Hey Scott, you might try the EFI forum here - the majority of the activity in there are guys using aftermarket EFI units.

I'm interested in the project but I'll bet it gets more attention in that section.

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-07-11 04:28 PM - Post#2043309    
    In response to someotherguy

Thanks, Im on day 3 and this is the coolest thing ive ever messed with....

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-10-11 06:34 AM - Post#2044622    
    In response to Skerlock

I Must say after messing with this system for 5 days now I had no Idea that engine would come to life like it has. I cant wait untill I get my fuel pressure up to 22 psi. Right now im producing 260HP at 13.5 PSI with 60 PPH

With the fuel pressure increase to 22 @ 88 PPH it will jump up too 350+ HP according to the BPC calculations. The builder told me the engine will definitely produce it as long as I feed it the fuel.

If anyone is considering tuning, the Dynamic EFI is a Great way to go.

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


Edited by Skerlock on 02-10-11 06:40 AM. Reason for edit: No reason given.

 
someotherguy 
Moderator
Posts: 25872
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-10-11 07:52 AM - Post#2044660    
    In response to Skerlock

You gonna bump up to a TPI pump, or a 1994-1995 TBI 7.4 pump? Either should be able to supply what you need.

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-10-11 10:14 AM - Post#2044742    
    In response to someotherguy

I could not find an In-tank GM direct replacement at 190 LPH all of the Gm pumps went to 255 LPH too much to get the 22 psi I need and would cause tuning headaches.

I found a Ford pump that is at 190LPH. So as son as the weather gets a little better im putting that in.

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


 
355Cheyenne 
Senior Member
Posts: 3765
355Cheyenne
Loc: Northern MN
Reg: 10-27-04
02-10-11 11:27 AM - Post#2044760    
    In response to Skerlock

  • Skerlock Said:

If anyone is considering tuning, the Dynamic EFI is a Great way to go.
Scott



I thought you may be happy with it. I personally never used them but was planning on it before I sold my 88. On paper their product looks very nice.

I have an old 1942 1.5 ton chevy with a strait 6 I want to restore and I am considering dropping a TBI 350/383 in it and running EBL. Some day...
98 Silverado k1500 4x4 350


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-10-11 11:35 AM - Post#2044764    
    In response to 355Cheyenne

Yes, I am very happy with it. It has so much control im only beginning to understand what its capable of. On the short term This engine is running better and better every time I flash the computer.

Ill post my VE tables once I run a few more Higher rpm tests.

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


 
someotherguy 
Moderator
Posts: 25872
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-10-11 12:01 PM - Post#2044774    
    In response to Skerlock

I'd be surprised if the 1994-1995 7.4 pump couldn't really give you the fuel you need - they power a 454 at a spec of 26~32 psi. The advertised numbers they say you need might be overkill, which is nice, but when it makes finding a direct swap-in pump difficult - I'd have to rethink the numbers.

Anyhow if you've found a pump, that's cool.

BTW, when adding a Whipple supercharger to the 5.7 TBI, I'm pretty sure the Whipple-suggested pump upgrade was a TPI pump.

Again, hard for me to imagine a naturally aspirated 383 @ 22 psi could use more fuel than a 454 @ 26~32 psi, or a supercharged 350 at whatever pressure spec Whipple has you use with that TPI pump. I'm not arguing it; I have zero experience with what you're doing, just offering my opinion.

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-10-11 12:07 PM - Post#2044781    
    In response to someotherguy

No its not needing more. The issue is stability in the fuel pressure I only need 22 psi 24 max. The issue is too much fuel pressure and turning it down at the Holley TBI The excess fuel has a chance of not flowing that volume back to the tank. Its a Volume issue on the return.

The 190 LPH is perfect The 255's are overkill for that. What is the flow on a 454 pump? LPH or GPH ?

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


Edited by Skerlock on 02-10-11 12:08 PM. Reason for edit: No reason given.

 
someotherguy 
Moderator
Posts: 25872
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-10-11 12:24 PM - Post#2044788    
    In response to Skerlock

Delphi FE0112 for 1994 7.4 - 27.6 gph, 30.4 psi
Delphi FE0115 for 1994 5.7 - 27 gph, 12 psi

I wish I could find more specific info. I don't know if that means 27.6 gph @ 30.4 psi, or...? I'd hate to assume. That would be what...104 lph?

I found some Delphi info online but it's all just generic crap touting how great they are, instead of actual spec sheets based on part #.

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-10-11 12:36 PM - Post#2044800    
    In response to someotherguy

This has been like pulling teeth trying to get spects for theses pumps. I got the Walbro Ford Mustang 190 LPH for 1985 - 97. Its Identicle size of the stock Chevy 88' pump Height same too. The difference is the Pickup is center on the ford pump and offset on the chevy.

Well see.....

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


Edited by Skerlock on 02-10-11 12:37 PM. Reason for edit: No reason given.

 
someotherguy 
Moderator
Posts: 25872
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-10-11 12:40 PM - Post#2044802    
    In response to Skerlock

I did find that Delphi has some brushless pumps coming out for 2012 that should be really impressive, are variable flow rate, based off a fuel controller. Talk about reinventing the wheel, but sounds like a smart way of doing things - at least OEM-wise. Would probably cost a fortune to retrofit something like that and give you a good number of gray hairs while you're at it.

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-10-11 12:53 PM - Post#2044806    
    In response to someotherguy

Yes probably so and I have too much grey hair as it is, The thing that spooks me is I have to drop my tank as you know to see if this will work. You know of an accurate photo of the Pickup assembly for a 1988 GMC Suburban Large rear tank.

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


 
someotherguy 
Moderator
Posts: 25872
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-10-11 01:29 PM - Post#2044815    
    In response to Skerlock

The sender/pump assembly isn't anything scary. Just a pain to drop the tank. Invest $7 in a cheap siphon bulb hose and drain the tank to make it lighter, then you can bring it down just letting it rest on your legs. They're far more easier to wrangle without fuel in them.

Don't forget to disconnect the lines as you bring it down, and unplug the sending unit, and detach the ground strap from the frame/body. Use a hammer and a brass drift (not a screwdriver) to knock the lock ring off the sender. Brass drift at the parts house or tool store = less than $10, and won't make sparks.

Looks pretty much like this, with the pump installed:


Pump just rests in that metal cradle in the bottom, and the outlet has a short rubber hose, clamps to the hard line on the sending unit. Hopefully this Ford pump you found has a similar bottom so you won't have to hack the cradle on your sender.

The OEM pump looks like this on the bottom (fuel pickup) side:


Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
02-10-11 01:56 PM - Post#2044827    
    In response to someotherguy

Thank you...I got a New ring and o-Ring seal. Looks like hooking up will be workable.

Thanks for your expertise, I am building up my inventory of parts pics.

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


 
someotherguy 
Moderator
Posts: 25872
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-10-11 02:45 PM - Post#2044846    
    In response to Skerlock

No problem; believe me it's often a learning experience for me!

NAPA's website is pretty good for parts pics, on most things - not often using "stock" photos but photos of the actual item.

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
EricU 
Member
Posts: 143

Loc: Nor Cal
Reg: 11-04-02
12-28-12 08:34 PM - Post#2301980    
    In response to Skerlock

  • Skerlock Said:
Well Last year I had a 383 Stroker built locally. Its a roller engine and has ran flawlessly for the past year. It runs well with the Holley 670 CFM Tbi on it but only 14.5 PSI.

I am adding the Dynamic EFI Flash eprom set-up plus a New TPS and Fuel Pump that delivers 190 LPH to give me a consistent 22-24 PSI...

Scott





I just ran across this thread;

Did you ever finish your install?

I picked up a '90 4wd Suburban earlier this year (super clean!) and love the truck, but it is very weak in the torque department and I plan on stroking the stock 350 to a 383, and want to keep the TBI (I live in Ca). I was just told about Dynamic and want to contact them next week when I get back.

Of course the truck would be "off-road" only

I would love to know how yours turned out and what you ended up with

Thanks, Eric


 
Skerlock 
Contributor
Posts: 259

Reg: 03-06-10
12-29-12 04:51 PM - Post#2302261    
    In response to EricU

Yes it all worked out very well. I did the fuel pum change and am running 23 psi. 670 cfm Holley. The torque is a blast especially when pulling my boat up hill. I dont slow unless i decide too. As far as off road lets just say im on my second rear end. I tore up my first but had a smile on my face when I did it. So, I would do it over and over again, I love the set up.

Scott
Scott

1988 1/2 Ton 4 W/D Suburban
383 Stroker (Roller)
Performer Edelbrock Manifold
670 CFM Holley TBI
3" Exhaust No Cat(shhhh), Flow Master 40
190 LPH In-tank Fuel Pump 21 PSI
EBL (Dynamic EFI) Computer


 
Low priced Genuine GM Auto Parts
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