Gain extra benefits by becoming a Supporting Member Click here find out how!
Classic Performance Products Classic Parts
Ciadella InteriorsAmerican Auto Wire Classic Industries
Chevs of the 40sDanchuk Catalog
Hellwig Products IncPerformance Rod & CustomEcklers AutoMotive
Octane LightingNu-Relics Power Windows
Impala Bob's Bob's Chevy Trucks Bob's Chevelle Parts Bob's Classic Chevy

Join the Community today







Username Post: Anyone using Holley HP EFI?        (Topic#347435)
czizza 
Forum Newbie
Posts: 3

Age: 49
Loc: NY
Reg: 09-09-17
10-01-17 06:53 AM - Post#2709358    

I have Edelbrock Proflo1 for about 20 years now, it is the original non sequential ported system with halleffect distributor and upgraded 36lbs injectors. I have it tuned to 540hp at the crank and it is working but showing its age.

I can upgrade to the ProFlo3 but that is a complete new purchase ... back in the day I could have done a Proflo1 to 2 upgrade with new harness and CPU; now they want you to drop down 3k+ for all new.

I see the Holley HP EFI universal kit; pretty much is an upgrade from the Proflo1 to something newer with Wideband a ton of features and if I want spark control I have to get an add on.

All for about 1/3 less; I think this is a good path ... does anybody have experience with the Holley HP? Does anyone have experience with Proflo and Holley to make the comparison?

-Melo



 




5Larry7 
"14th Year" Gold Supporting Member
Posts: 1903
5Larry7
Loc: Dallas, TX
Reg: 05-17-04
10-01-17 02:57 PM - Post#2709396    
    In response to czizza

I have experience with the Holley HP but none with the Pro Flo. I have been running the Holley HP system on my car for about 5 years, (SB 327 with a Lunati mild cam, headers and running through a 700R4). Actually I started out with a HP TBI system but about 2 years ago converted it to a MPFI system. I am very pleased with the results. The engine runs great, starts easily, no warmup needed, better fuel economy and great drivability. I used the Holley dual sync distributor which has both a cam and crank sensor to achieve full sequential operation of the injectors and timing control. The Holley HP ECU offers a great deal of adjustability for fine tuning. Overall I am very satisfied with it.

'57 210, 327 cid, Holley MPFI, 700R4, A/C & more.
'51 Studebaker Starlite coupe, 350, TH400, GV OD.
'96 Replica of a 1950's Teardrop Trailer.


 
czizza 
Forum Newbie
Posts: 3

Age: 49
Loc: NY
Reg: 09-09-17
10-02-17 09:16 AM - Post#2709492    
    In response to 5Larry7

  • 5Larry7 Said:
I have experience with the Holley HP but none with the Pro Flo. I have been running the Holley HP system on my car for about 5 years, (SB 327 with a Lunati mild cam, headers and running through a 700R4). Actually I started out with a HP TBI system but about 2 years ago converted it to a MPFI system. I am very pleased with the results. The engine runs great, starts easily, no warmup needed, better fuel economy and great drivability. I used the Holley dual sync distributor which has both a cam and crank sensor to achieve full sequential operation of the injectors and timing control. The Holley HP ECU offers a great deal of adjustability for fine tuning. Overall I am very satisfied with it.



Thank you for the update ... About the Dual Sync setup ... you mentioned it has a crank signal did you have to space out your accessories to make up for the difference?



 
5Larry7 
"14th Year" Gold Supporting Member
Posts: 1903
5Larry7
Loc: Dallas, TX
Reg: 05-17-04
10-03-17 01:47 PM - Post#2709653    
    In response to czizza

The dual sync distributor is a replacement for a regular distributor. It is not a crank trigger or like a GM Opti-spark. It is plug and play to the Holley EFI harness. I looked at crank triggers, but did not want to get involved with spacing out the pulleys and so on. Check the below link.
https://www.holley.com/products/ignition/dis tribut...

'57 210, 327 cid, Holley MPFI, 700R4, A/C & more.
'51 Studebaker Starlite coupe, 350, TH400, GV OD.
'96 Replica of a 1950's Teardrop Trailer.


 
Rick_L 
Honored Member
Posts: 27207
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
10-03-17 07:26 PM - Post#2709700    
    In response to 5Larry7

In real simple terms, a "dual synch" distributor provides a signal for when the #1 cylinder fires, plus a signal for all 8 to fire. Knowing which one is #1 allows sequential timing of the injectors as well as ignition.

Sequential injection is not necessary but does provide more control, which can result more importantly in control of low speed operation, and that makes it better for emissions and economy. But there may be some small power advantage throughout the all conditions.



 
czizza 
Forum Newbie
Posts: 3

Age: 49
Loc: NY
Reg: 09-09-17
10-04-17 05:15 AM - Post#2709715    
    In response to Rick_L

I did not know you can run dual sync in just cam mode, essentially a halleffect distributor and still get timing advance mode.

I have a Mallory Halleffect for computer control and I am guessing it will work.

I will call tech support and report back, thanks guys.




 




Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

469 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.376 seconds.   Total Queries: 17   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 01:09 AM
Top