Fuel System Upgrade Discussion
#1
03-30-2010, 10:26 PM
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Fuel System Upgrade Discussion
I'd be very interested in a discussion as to what people's experience, opinions and theories with with upgraded fuel systems they are running, recommend or like for whatever reason.
Question #1: what's the generally accepted HP capacity of the stock fuel system?
Some background: As you can see in my Sig, my car has 60lb injectors. Garrett Lim (the "G" in GIAC) seems generally concerned about the stock fuel system's ability to safely support too much more power especially on 91 octane.
Question #1: what's the generally accepted HP capacity of the stock fuel system?
Some background: As you can see in my Sig, my car has 60lb injectors. Garrett Lim (the "G" in GIAC) seems generally concerned about the stock fuel system's ability to safely support too much more power especially on 91 octane.
When I was getting more info about a high octane file, GIAC voiced concerns about running too much more fuel because at some point the stock fuel system will start running out of capacity. It seems the fuel pump is the weak link at that point. Garrett is not big fan of the 5 bar FPR because he feels that the overall fueling capacity isn't greatly improved especially when you're already running bigger injectors .
It's obvious by some of the other tuner's fuel setups IE TONY@EPL routinely sets up customer by 72?lb injectors AND a 5 bar.
There is obviously a difference of opinion between tuners as to what works best and frankly I find that totally acceptable. I'm not trying to start a tuner war here, definitely not trying to pit EPL against GIAC as I feel that everyone is entitled to not only their opinion but the technical theories with which they tune. For the record I think that evoms, protomotive, UMW also turn out great product.
I will say that GIAC is conservative in many ways. Conservative tunes (that are still exceptionally powerful), Conservative dyno. I have been very happy with their product I have never seen a GIAC engine blow after visiting this site almost daily for the last 4-5 years. Anyways I'm getting off topic. My questions are above
It's obvious by some of the other tuner's fuel setups IE TONY@EPL routinely sets up customer by 72?lb injectors AND a 5 bar.
There is obviously a difference of opinion between tuners as to what works best and frankly I find that totally acceptable. I'm not trying to start a tuner war here, definitely not trying to pit EPL against GIAC as I feel that everyone is entitled to not only their opinion but the technical theories with which they tune. For the record I think that evoms, protomotive, UMW also turn out great product.
I will say that GIAC is conservative in many ways. Conservative tunes (that are still exceptionally powerful), Conservative dyno. I have been very happy with their product I have never seen a GIAC engine blow after visiting this site almost daily for the last 4-5 years. Anyways I'm getting off topic. My questions are above
#2
03-30-2010, 10:34 PM
A larger injector will leave you more room to grow in the future. That's as good as any reason to go bigger. I'm not one to push injectors past the limits they were designed for though. To each their own, but I'd listen to Tony seeing as he seems to know what he is talking about.
Cheers,
_Zac
Cheers,
_Zac
#3
03-30-2010, 11:32 PM
Ari, I remember this thread and it had a good info:
https://www.6speedonline.com/forums/...-upgraded.html
https://www.6speedonline.com/forums/...-upgraded.html
#4
03-31-2010, 12:44 AM
Basic Sponsor
Dual pumps in series with at least a -6 line for the connection with 60 lbs injectors yields safely mid 700s to the wheels at 3.8 bar stock pressure ... add 750cc or 850 cc and you get a tad more..
This is just my experience... simple, effective, and cheap.
Below is an example...
mark
This is just my experience... simple, effective, and cheap.
Below is an example...
mark
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
#6
03-31-2010, 11:36 AM
Basic Sponsor
+1 on Price
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997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#7
03-31-2010, 12:19 PM
great discussion. in past cars (jap) modded, generally speaking; a larger walbaro or equiv intank pump/adjustable FPR was enough for most light mods. after that larger injectors, rails, lines, secondary pump in swirl tank. I'd also like to understand more about fueling... with the P, seems a lot of what i did with prior cars, don't apply.
On a softronics tune and when asked about using both 5barFPR and 60lb injectors, answer was that it wasn't recommended as this would flood the cylinder walls. 996tt's engines currently out for some mods including a k2418g/60lbinj/stock fuel pump combo. 1.3bar boost, no EVC. 97oct
can a stock pump be run together with an inline 044?
where would this pump inline 044 be located and does the kit shown in this thread include all necessary fittings/hoses to do so?
thanks!
On a softronics tune and when asked about using both 5barFPR and 60lb injectors, answer was that it wasn't recommended as this would flood the cylinder walls. 996tt's engines currently out for some mods including a k2418g/60lbinj/stock fuel pump combo. 1.3bar boost, no EVC. 97oct
can a stock pump be run together with an inline 044?
where would this pump inline 044 be located and does the kit shown in this thread include all necessary fittings/hoses to do so?
thanks!
Last edited by Mad Ness; 03-31-2010 at 12:28 PM.
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#8
03-31-2010, 12:28 PM
Basic Sponsor
great discussion. My engines currently out for some mods including a k2418g/60lbinj/stock fuel pump combo.
On a softronics tune and when asked about using both 5barFPR and 60lb injectors, answer was that it wasn't recommended as this would flood the cylinder walls.
can a stock pump be run together with an inline 044?
where would this pump inline 044 be located and does the kit shown in this thread include all necessary fittings/hoses to do so?
thanks!
On a softronics tune and when asked about using both 5barFPR and 60lb injectors, answer was that it wasn't recommended as this would flood the cylinder walls.
can a stock pump be run together with an inline 044?
where would this pump inline 044 be located and does the kit shown in this thread include all necessary fittings/hoses to do so?
thanks!
we run 3.8 bar stock pressure... all you do it stick it in and your done... all the wires and custom cnc fittings are included...
this set up does 750rwhp on 60lbs... assuming you have the correct tuning/maf etc... Y pipe and intake...
here is a pic your looking for:
custom CnC machined fitting for direct connection- no welding required.
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Last edited by markski@markskituning; 03-31-2010 at 02:46 PM.
#9
03-31-2010, 02:43 PM
From reading back on the build thread for the Evoms GT610, it was said that this is the limit of the stock fuel system (3.8 bar and stock injectors). In order to jump into the 660 or 700 kit, the injectors would need to be changed out.
#12
03-31-2010, 04:39 PM
Basic Sponsor
mark
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
#13
03-31-2010, 04:40 PM
I assume these pumps pull from the in tank fuel pump system. This stock in tank fuel pump is the limiting factor. So does anyone know what the maximum fuel flow of the intank pump is? Can the extra inline pump run the in tank fuel pump dry?
#14
03-31-2010, 06:54 PM
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