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Discussion Starter · #1 ·
I was contemplating getting an inline MSD fuel pump for my nosd up tibby.. but i was told by my performance shop it would be a waste of money becasue my fuel system is a fuel return delivery system?? i dunno... can someone explain.. he said it would be a waste of money for the small 55 shot im runnin, especially that its a dry kit... explain please someone.... anyway.. what do ya think?


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2001 Red Hyundai Tibby owner
:Weapon*R Dragon CAI w/ Ram Air
:SR Clear corners
:SR Altezzas
:Indiglo Gauges
:55 shot ZEX Nitrous Kit
:Hayame Cat-Back Exhaust
:Intrax 1.5" Lowering Springs
:Full JL Audio System
 

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they were sorta right, the system uses a fuel return line and the regulator is a reverse pressure type, ie more vaccum in the manifold it pulls up on the valve in the regulator letting less fuel return. The msd pump can also not compensate for the stock pump since all it's doing is pushing the fuel the stock pump gives it. A 95-97 talon turbo pump can be had for $120 and will be all the pump you ever need.


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Discussion Starter · #3 ·
thats cool, but the MSD fuel pump is only 90 bucks, and i can set it up as a "booster". So, when im bottle feeding, it will kick in at WOT... and its only gonna cost 60 for the install... i dunno... zex has the same kit, but 191 bucks!!


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2001 Red Hyundai Tibby owner
:Weapon*R Dragon CAI w/ Ram Air
:SR Clear corners
:SR Altezzas
:Indiglo Gauges
:55 shot ZEX Nitrous Kit
:Hayame Cat-Back Exhaust
:Intrax 1.5" Lowering Springs
:Full JL Audio System
 

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hey brendan, is that a drop-in replacement for our stock?


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QUOTE "The msd pump can also not compensate for the stock pump since all it's doing is pushing the fuel the stock pump gives it."


i must disagree with your opinion...

using two pumps inline WILL in fact boost your fuel flow capacity.

this is something that has been used through the years in drag racing of all levels.

its been used by vortech supercharger systems on mustangs for years and years.. it does in fact support the rated horsepower level it claims....

i STRONGLY recommend using an inline fuel pump in addition to your stock pump.. this will keep your nitrous breathing engine alive for years and years. :)

remember, the key to a turbo/supercharged/nitrous engine is the fuel flow capacity. an inline pump will cover all the bases when it comes to fuel requirements.

see the pics of how an inline pump should be installed on a hyundai beta engines bay...

http://www.pcrepairworld.com/nitrousworld




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Fordfaster....
I think your theory on the inline is a little fuzzy. Yes an inline fuel pump is good if it's installed as a compensator to the stock fuel pump. You never want to put a fuel pump after another fuel pump because one is gonna dry out the other or they might malfunction all together, in the long run. As far as the NOS is concerned a 50-60 shot of NOS is relatively small and a stock fuel pump is capable of handling this. Coupled with the regulator provided by the NOS kit it will be ok. I ran a 14.9 at the track with a sixty shot of NOS and a stock fuel pump but I had an adjustable fuel regulator to compensate along with the NOS regulator. Now if you want to upgrade to a bigger fuel pump yes that is the best idea. It will give you constant fuel pressure.
I think vortech also works with limitations to the stock fuel pump and mostly with V-8 what about 10 psi and that also depends on your injector flow.<img src=/images/forums/snitz/finger.gif width=33 height=15 border=0><img src=/images/forums/snitz/moon.gif width=15 height=15 border=0>


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A mitsu talon pump is a direct drop in for ours, 95-97 model year. Venom, walbro and a few others make these pumps as replacements. Actually I have the walbro super hi flow $120 usd and I'm running super rich, I can't even use a RFPR to trim it I need to get a SAFC to remap the fuel. Ford Faster remember I had my car on a dyno testing it and an inline pump will out flow the stock unit, tho it will keep the pressure up once it gets past what the stock unit can do you can get a dry line, which is very bad. Also FasterFord your using a wet system, not a dry one.


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Discussion Starter · #8 ·
Hey Brendan, i ahve an 01 tiby, 2.0 5sp. will the talon turbo 95 - 97 fuel pump be more than sufficiant. i am running 55 shot ZEX dry, and want to run the 65 shot.. will the direct drop in be good... please help?


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2001 Red Hyundai Tibby owner
:Weapon*R Dragon CAI w/ Ram Air
:SR Clear corners
:SR Altezzas
:Indiglo Gauges
:55 shot ZEX Nitrous Kit
:Hayame Cat-Back Exhaust
:Intrax 1.5" Lowering Springs
:Full JL Audio System
 

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If you convert that dry kit to a wet kit the extra fuel is added with the shot therefore you won't need to make any additional modifications to your current fuel system.. If your gonna spray spray wet...<img src=/images/forums/snitz/smile.gif width=15 height=15 border=0>


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brendan... i disagree with your comment about using two pumps inline.. the line will absolutely NOT dry out.

i dont care how much dyno time you've had.. its a simple concept to understand... you see. the stock pump will actually flow MORE when there is a second pump in front of it.. because the inline pump is acting as a puller.. it keeps the in-tank pump primed and it has less of a restriction therefore it continues to pump without any restriction.


thats MY opinion. and i've set up a few cars using this method. including my 11 sec stang (sold 6 months ago) and it worked BEAUTIFULLY with a 150 shot wet kit.

i'm not designing or testing a new theory here... huge companies like VORTEX and others like ZEX and NOS have been selling inline pumps for YEARS and they are PROVEN to support over 500 HP in most cases, with the stock fuel pump still in the tank.



<img src=/images/forums/snitz/guns.gif width=33 height=16 border=0>

:) hehehe dont get mad, get spray !!!!!


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Everyone is wrong on their reasoning of why an inline pump will work. Here's how it works: In your stock fuel system, your OEM pump works pretty hard. It has to pump the gas all the way up to your engine, pressurize the system to force fuel into your engine when you injectors open and then push all the extra fuel that is not used back to your tank. When you add an inline pump, your OEM pump is only responsible for getting the gas a few feet down the line to the inline pump. The inline pump then assumes responsibility for doing everything else. The inline pump will not "suck" the line leading to it dry because impeller style pumps don't "suck" very well, they push. This is why cars that don't have an "in-tank" fuel pump have their fuel pump mounted close to the tank and feed from the bottom of the tank. It uses gravity to get the fuel the 4 or 5 inches to the pump. An inline pump will not increase the volume of fuel that your stock pump can push, but it will prevent pressure drop-off when your engine starts demanding more fuel. With your OEM pump alone, the pressure in the fuel rail will drop as your engine get close to using all of the fuel available. The inline pump will prevent this. Long story short, an inline pump will work fine with a 55 shot.


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Aaron Britt
Events Coordinator, Las Vegas F-body Assoc.
'97 Trans-Am WS6
'96 Elantra GLS
"The shortest distance between two points is a straight line........but, it's not as much fun."
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thanks for the info.. it will work for a 55 shot, a 100 shot.. even a 300 shot.





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Discussion Starter · #13 ·
yea, thanks all, im gonna go with the MSD in-line.. its cheaper than the drop in, plus it will handle tons more hp, and its easy to install... i appreciate all the info.. but can't we all just get along? hehehe, well, fordfaster, if i wanna upgrade to the 65 shot the inline will be the best bet.. correct?


<hr width=60% noshade size=1 align=left>---
2001 Red Hyundai Tibby owner
:Weapon*R Dragon CAI w/ Ram Air
:SR Clear corners
:SR Altezzas
:Indiglo Gauges
:55 shot ZEX Nitrous Kit
:Hayame Cat-Back Exhaust
:Intrax 1.5" Lowering Springs
:Full JL Audio System
 

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the inline is good.

but you have to cut the metal pipes up in the engine bay, the pump will need to be installed IN the engine bay.. so it will be tricky to get it right.. also, you'll need GOOD fuel lines, and GOOD clamps to keep it from leaking..

i like the MSD, but its also a bit noisy.. .. i will be uprading to the walbro 255lph in-tank pump soon... maybe in a few months... but for now the dual pump setup is working great for me and it would be your best bet instead of changing out the in-tank pump.


:)


have fun with your juice.

i have mine set to 80 HP. and just tonight, i spanked myself two hondus.. one gsr integra with headers, intake/cat-back and suspension work... then, right after him, i raced his friend with a new accord v6 with headers and cat-back and intake too.. i smoke them both easily !!! i put 5 cars on the accord by 65 mph. :)


laterz.<img src=/images/forums/snitz/laugh.gif width=15 height=31 border=0>


<hr width=60% noshade size=1 align=left>1999 Hyundai Elantra Auto. 80HP Wet Nitrous System. http://www.pcrepairworld.com/nitrousworld
AIM SN: FordFasteR
 
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