Really needs extended off the throttle body 1/4” more
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Edelbrock Proflo 4
- Thread starter 6872xtc
- Start date
^^^^ yup! I agree.
And so I looked several times today and my IAC was usually at 0 after letting the idle stabilize in neutral. I can turn the screw less than a quarter turn and close the throttle blades and make it go up to 4&5%. I did check to make sure that the throttle was against the stop, ( remember that I don't have a return spring) and it was good. I did wonder if I am getting away with no return spring due to having the 700R4 TV cable helping out.
And so I looked several times today and my IAC was usually at 0 after letting the idle stabilize in neutral. I can turn the screw less than a quarter turn and close the throttle blades and make it go up to 4&5%. I did check to make sure that the throttle was against the stop, ( remember that I don't have a return spring) and it was good. I did wonder if I am getting away with no return spring due to having the 700R4 TV cable helping out.
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how is the pedal pull on these edelbrock kits ?
my holley sniper is a STIFF pile of
my holley sniper is a STIFF pile of
I like mine, I tried to mimic the geometry of the TBI unit and it seems nice, even offroad.how is the pedal pull on these edelbrock kits ?
my holley sniper is a STIFF pile of
Side note.... I hear that there is another unit running today!!!
Uh no I wouldn’t haveWHOOHOO!!!
You should have let me stab the dizzy... you would have been done sooner!
At startup it was at 6*, maintaining my ritual of being off 6*
I haven't even tried to look at mileage yet. I just passed 200 miles. I know that it was using too much fuel for a fair while, but I believe that has cut back a good bit. My long term fuel trim even shows that. It is smelling better, but no proof in numbers. The TBI was going through too much gas before I pulled it, so I figured that it can only improve.... I hope.10-4on pics when i am ready . ..
and for those running this system whats your mpg average ? i am doing around 6.25 or so on my sniper .
Wanted to revisit this a bit with others looking to use the system, and discussing the vacuum numbers and stuff with @sweetk30Small block.....
Didn't I tell the boring story already??
354 CID '72 block, Edelbrock 5089 heads with 2.02 /1.60 valves, compression is estimated at 9.7(?), not sure.. cam was originally intended for TBI, seem to recall 425/447 lift and 210/220 duration. Shorty headers.
The duration numbers are part of what Edelbrock makes the decision on to select base map.
So Dave's engine is .020" over 350:
cam
https://www.jegs.com/i/Edelbrock/350/2102/10002/-1
heads
https://www.jegs.com/i/Edelbrock/350/5089/10002/-1
my set up here:
https://www.jegs.com/i/Chevrolet-Performance/809/19417624/10002/-1
I'll verify the vacuum readings on mine
Started on MAP 5006
Swipped from the edelbrock forum page:
If you monitor your AFR and compare it to your AFR SP (set point aka AFR target) you'll see that the ECU is constantly trying to make the actual AFR match the AFR set point. The percentage change in fueling is shown as Short FT (fuel trim). The ECU will learn and update its fuel mapping by applying the Long FT trim values to the base fuel map so that next time through that section of the map, the fueling changes will already have been made thereby making your Short FT closer to zero.
The system is constantly using closed loop AFR feedback to keep AFRs on target. This means that environmental changes like elevation or ambient temp which will affect atmospheric air density won't affect your AFR because the system will automatically correct them to always be on target.
You can verify that the vacuum advance timing feature is working by first checking what your max timing is. Go into the Advanced Tuning menu and select Spark Control and see what your Total Spark value is. Say for example it's 35° and your Vacuum Advance setting is 10°. You'll get max vacuum advance in max engine vacuum so while cruising, expect to get about half of your max vacuum advance value. So with a base of 35°, adding in half of your max vacuum advance while cruising should get you about 40° of total timing. Watch the channel Spark Adv to see what your ignition timing is. If the timing value is higher than your Total Spark value, the vacuum advance is doing its job.
If you monitor your AFR and compare it to your AFR SP (set point aka AFR target) you'll see that the ECU is constantly trying to make the actual AFR match the AFR set point. The percentage change in fueling is shown as Short FT (fuel trim). The ECU will learn and update its fuel mapping by applying the Long FT trim values to the base fuel map so that next time through that section of the map, the fueling changes will already have been made thereby making your Short FT closer to zero.
The system is constantly using closed loop AFR feedback to keep AFRs on target. This means that environmental changes like elevation or ambient temp which will affect atmospheric air density won't affect your AFR because the system will automatically correct them to always be on target.
You can verify that the vacuum advance timing feature is working by first checking what your max timing is. Go into the Advanced Tuning menu and select Spark Control and see what your Total Spark value is. Say for example it's 35° and your Vacuum Advance setting is 10°. You'll get max vacuum advance in max engine vacuum so while cruising, expect to get about half of your max vacuum advance value. So with a base of 35°, adding in half of your max vacuum advance while cruising should get you about 40° of total timing. Watch the channel Spark Adv to see what your ignition timing is. If the timing value is higher than your Total Spark value, the vacuum advance is doing its job.
o.k. i think i am close to pulling the trigger on a pro flo 4 system for my brand new L31 vortec engine in the truck .
knowing all my problems with the sniper and now removing the unit its time to turn the page .
will i be happier with the edelbrock kit for those who have had both ?
does it tune good with less input and changes from you unlike the sniper ?
have you noticed a better throttle pedal feel as close to stock as possible ?
are you glad you picked it or its o.k. or its not what everyone says it is ?
my plan is the unit with tablet and fuel pressure regulator kit from them for return system as my truck is plumbed this way already .
throttle bracket kit 8041 https://www.summitracing.com/parts/edl-8041
fuel pressure regulator kit 17400 https://www.summitracing.com/parts/edl-17400
pro flo 4 kit 35780 https://www.summitracing.com/parts/edl-35780
any other parts ? pointers ? tips ? cautions ?
thanks for your input and don't hold back . @Bent77 @6872xtc @Shawn @pomai @pma4x4
knowing all my problems with the sniper and now removing the unit its time to turn the page .
will i be happier with the edelbrock kit for those who have had both ?
does it tune good with less input and changes from you unlike the sniper ?
have you noticed a better throttle pedal feel as close to stock as possible ?
are you glad you picked it or its o.k. or its not what everyone says it is ?
my plan is the unit with tablet and fuel pressure regulator kit from them for return system as my truck is plumbed this way already .
throttle bracket kit 8041 https://www.summitracing.com/parts/edl-8041
fuel pressure regulator kit 17400 https://www.summitracing.com/parts/edl-17400
pro flo 4 kit 35780 https://www.summitracing.com/parts/edl-35780
any other parts ? pointers ? tips ? cautions ?
thanks for your input and don't hold back . @Bent77 @6872xtc @Shawn @pomai @pma4x4
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I used the top throttle blade spot, right at the tip. It's a bit soft without the return spring
Mind you I welded a short plate onto the holley to get the throw right, which was fine
I Like the tablet over the handheld on the Sniper because the screen is easier for old eyes and fat fingers
Also a lot easier to navigate
@Babaganoosh has the sniper now and hasn't had much trouble
Biggest thing I appreciated from the PF4 is its a kit. I wanted all those parts
Great thing about the FiTech/Sniper base kit, is if you have the intake and dizzy, you don't have to buy unnecessary parts. That's a deal breaker for some, or if you don't like parts included with the PF4, you build your own kit with the others.
reading threw the pro flo 4 install direction i had a question . . . well they answered it in BOLD
NOTE:
Auxiliary Outputs are rated at 1.5 AMP max and must be configured to activate with a relay (not included). DO NOT connect ECU fan
outputs directly to the fans.
couldn't get a straight answer from the other brand of stand alone efi and i asked a few different tech people .
knowing this will help me when i am ready for electric fans and use my big bosch 75 amp spec relays i already have over the 30/40 amp cheepy units out there .
NOTE:
Auxiliary Outputs are rated at 1.5 AMP max and must be configured to activate with a relay (not included). DO NOT connect ECU fan
outputs directly to the fans.
couldn't get a straight answer from the other brand of stand alone efi and i asked a few different tech people .
knowing this will help me when i am ready for electric fans and use my big bosch 75 amp spec relays i already have over the 30/40 amp cheepy units out there .
I have dual intake pattern on the heads, so I reverted back to the Gen1 style intake and used the Edelbrock supplied ones
I don't care much for the Vortec pattern. There is a gasket made by Fel Pro that has a metal support between the ports. Haven't used it, but I'd probably go that route. Not sure what Edelbrock supplies for the Vortec style
and the fuel pressure sender -6m to -6f with 1/8" pipe thread to hold the sensor . is it just 1 port or 2 with 1 plugged off ? i want to add in my gauge i have on the dash now so when i am not doing tablet i still can watch and verify .
trying to lay out my fuel stuff in my head to order yet hook up to my original lines i made for the old efi toilet .
trying to lay out my fuel stuff in my head to order yet hook up to my original lines i made for the old efi toilet .
I you zoom in, I have added an inline gage setup. It is a -6 F swivel and a -6 M that has a NPT port. The fitting on the fuel rail is -6 F swivel.
I'll come across the picture of the part here in a bit and update this
https://ck5.com/forums/threads/the-bent77-k10-winter-upgrades.322474/page-288#post-3950330
