Drilling out the head for better fuel flow
04-27-2017, 07:22 AM
#1
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Thread Starter
Drilling out the head for better fuel flow
Has anyone done it? I'm making my own fuel system instead of buying a fass or airdog. I just upgraded my line from the fuel filter to IP with 1/2" hose and an8 fittings with m12x1.5 to an8 adapters. But the adapters are rather restricted. I was wondering if anyone drilled out the inlets on the head where the banjo bolts go. 3/8npt to an8 adapters seem like they would flow much better but I'd rather have input before drilling out the head. Thanks for the help everyone
04-27-2017, 04:38 PM
#3
Registered User
Thread Starter
yea I'm sticking with the VE I'm pushing 400 rwhp and 800 ftlbs right now with not fuel system no intercooler and no water meth on a single turbo. I'm not taking about drilling the banjo bolts. I'm talking about drilling and tapping the head where the banjo bolts mount to accept a 3/8 NPT instead of the m12x1.5 so that it will flow about as much as the AN8 fitting would
05-01-2017, 07:49 PM
#5
Registered User
I got what you are talking about. Do you have a fuel pressure gauge? If yes, is it tapped in after the filter? If not, I would recommend getting one.
If your fuel pressure never drops below 2 or 3 psi post filter and head, more flow isn't going to be of benefit to you.
If your fuel pressure never drops below 2 or 3 psi post filter and head, more flow isn't going to be of benefit to you.
05-01-2017, 08:04 PM
#6
Registered User
Thread Starter
I got what you are talking about. Do you have a fuel pressure gauge? If yes, is it tapped in after the filter? If not, I would recommend getting one.
If your fuel pressure never drops below 2 or 3 psi post filter and head, more flow isn't going to be of benefit to you.
If your fuel pressure never drops below 2 or 3 psi post filter and head, more flow isn't going to be of benefit to you.
05-02-2017, 01:40 PM
#7
Registered User
yea I have a fuel pressure gauge after the filter but its not run to the cab so I dont know what it is on the throttle but idle is 5-7 psi with the stock lift pump. I'm making my own fuel system with a walbro 392 cause I can build the system cheaper than but I ng a fass or airdog
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05-04-2017, 08:57 AM
#8
Registered User
More pressure will certainly benefit a VE.
More dynamic timing advance sooner, more injection pump cooling, and more volume as well if the lift pump bore/lines/sump supports it.
I run a steady 20psi at the head, and my fp never drops below 12-14psi at 3700rpm, even with sizable sticks & a large VE.
More dynamic timing advance sooner, more injection pump cooling, and more volume as well if the lift pump bore/lines/sump supports it.
I run a steady 20psi at the head, and my fp never drops below 12-14psi at 3700rpm, even with sizable sticks & a large VE.
I got what you are talking about. Do you have a fuel pressure gauge? If yes, is it tapped in after the filter? If not, I would recommend getting one.
If your fuel pressure never drops below 2 or 3 psi post filter and head, more flow isn't going to be of benefit to you.
If your fuel pressure never drops below 2 or 3 psi post filter and head, more flow isn't going to be of benefit to you.
05-04-2017, 11:09 AM
#9
Registered User
Thread Starter
More pressure will certainly benefit a VE.
More dynamic timing advance sooner, more injection pump cooling, and more volume as well if the lift pump bore/lines/sump supports it.
I run a steady 20psi at the head, and my fp never drops below 12-14psi at 3700rpm, even with sizable sticks & a large VE.
More dynamic timing advance sooner, more injection pump cooling, and more volume as well if the lift pump bore/lines/sump supports it.
I run a steady 20psi at the head, and my fp never drops below 12-14psi at 3700rpm, even with sizable sticks & a large VE.
05-04-2017, 11:43 AM
#10
OFELAS use a custom Canada built Pee pump style hard maple wood piston style pump, it holds pressure very well at WOT and what he suggested above has been achieved on his rig
VE will always benefit from cooler fuel and more flow/pressure to a point.
VE will always benefit from cooler fuel and more flow/pressure to a point.
05-04-2017, 01:30 PM
#11
Registered User
Gizmodo - My supply system consists of - A1000, billit dual filter housing, aeromotive boost referenced regulator, AN10 lines, fuel coolers on supply and return, 20 gallon aluminum cell with fuel resistant-anodized cooling coils in it.
Flatbed - I'm not sure where the reference to maple wood comes from. Are you inquiring about my previously used sub 420hp piston pump details or the new one?
Flatbed - I'm not sure where the reference to maple wood comes from. Are you inquiring about my previously used sub 420hp piston pump details or the new one?
what kinda fuel system setup are you running? I was gonna go with a walbro 392 bypass regulated to 12psi a prefilter before the pump 1/2" line and an8 fittings with the stock filter head with the fs1221 filter before the injection pump and a nodded fuel pickup in the tank.
05-04-2017, 01:50 PM
#13
Registered User
IDK about 420hp, that was at the front 33's running on 5 spark plugs.
New one has something like NASA quality machining for the cylinder, and the piston was a Wiseco built unit with ring lands lowered. Dual custom springs that are rpm controlled. NO COIL bind possible.
It's a large bore piston pump I got from "nascar" Mark Wilson at Dieseltuff with a few different stout psi springs - gave me 1465 at the rear wheels with a tuning fork.
New one has something like NASA quality machining for the cylinder, and the piston was a Wiseco built unit with ring lands lowered. Dual custom springs that are rpm controlled. NO COIL bind possible.
It's a large bore piston pump I got from "nascar" Mark Wilson at Dieseltuff with a few different stout psi springs - gave me 1465 at the rear wheels with a tuning fork.
05-05-2017, 11:01 PM
#14
Registered User
More pressure will certainly benefit a VE.
More dynamic timing advance sooner, more injection pump cooling, and more volume as well if the lift pump bore/lines/sump supports it.
I run a steady 20psi at the head, and my fp never drops below 12-14psi at 3700rpm, even with sizable sticks & a large VE.
More dynamic timing advance sooner, more injection pump cooling, and more volume as well if the lift pump bore/lines/sump supports it.
I run a steady 20psi at the head, and my fp never drops below 12-14psi at 3700rpm, even with sizable sticks & a large VE.
As for the dynamic timing, simply pull a shim or two from behind the KSB if you want it to advance sooner.
As for your "large" VE, it is the same size as the rest of ours.
05-06-2017, 08:42 AM
#15
So in your example you would want a worn out oil pump to keep your oil pressure down to make less heat inside your engine?
As far as you comparing your 12mm home tweaked ve to OFELAS Giles built pumps you must be smoking the devils lettuce.
As far as you comparing your 12mm home tweaked ve to OFELAS Giles built pumps you must be smoking the devils lettuce.
Better cooling? How? If no more fuel is moving through the pump, how is stacking more pressure at theinlet making anything cooler? If anything, the extra pressure is creating more heat.
As for the dynamic timing, simply pull a shim or two from behind the KSB if you want it to advance sooner.
As for your "large" VE, it is the same size as the rest of ours.
As for the dynamic timing, simply pull a shim or two from behind the KSB if you want it to advance sooner.
As for your "large" VE, it is the same size as the rest of ours.