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whats the best fuel pump setup for 400-450 rwhp supercharged

10K views 33 replies 14 participants last post by  LaserRed  
#1 ·
hi my buddy has a 01 gt and is having a vortech intercooled blower put on and is looking for ideas on fuel pumps to support 400-450 rwhp . ive searched but havent realy got a straight answer on which pump or pumps. i know theres steeda pumps,dual focus pumps,cobra pumps,walbro pumps,etc whats the easiest set up and can stock sending unit and tank be used. thanks
 
#34 ·
#33 ·
i know this is might or might not have t do with the fuel pump, but i have the cobra pump in a gt tank, recently the car will not pull over 5000-5200 rpms. it hits there fast and then after that just sitts theres and pull ever so slow. im not sure if the pump is going bad, theres about 7k miles one the puimp any helpp would be great
 
#30 ·
well since this thread is over i want to know what everybody on here thinks i should do because i have a 97GT that i dont want to convert to returnless fuel system on , right now i have a 255 intank and a BAP and about 10psi
so what setup should i go with ?????

i am also assuming that 03 cobras are returnless like 99+ GTs
i dont have $1000+ for an all out setup so are there any other options?
 
#28 ·
interesting read. I have an 02 gt w/ vortech and i have the focus pump. It pulled 426/385 on the dyno with a decent a/f ratio, but will detonate on the street under wot or over 5lb boost (which i obvuiosly dont do since i discovered it). Wonder if the tank design has anything to do with it? I am still waiting on an iat relocation kit, so i dont have one now. With the heat here in vegas, i am careful. so wonder if it is that or just a crappy tune?
 
#26 ·
I had the same fuel setup (BAP & stock pump) on a 2000 GT, but still had only 30 lb injectors. It made 373 rwhp with the Vortech supplied chip (also had 3.33" pulley and exhaust). I sold it & the buyer had it tuned at the dyno and they got 397 rwhp. But with the small injectors and stock MAF, it was on the ragged edge.

Hiwaystar said:
...I have never heard of anyone else with the kind of set-up I'm using.
For about 20-25K miles I've been using the stock GT fuel system w/BAP and 47lbs injectors. But, my bottom end IS forged, and only putting down 393rwhp.
I never mention it to stay out of any flaming, but since it was already mentioned here, there you go.

P.S. I had a really good tuner also.
 
#25 ·
99SaleenS281 said:
I'm not rich by any stretch of the imagination. Sorry if I came off as rude, but for years I always read posts like this where people spend all this money on good gear and then skimp out on a few hundred dollars at the end. If he can save up 1800 for the blower, then he can save up a few hundred for a decent fuel set up is all.
yes i understand for sure that you shouldnt cheap out on fuel system but the tank is not necassary. he should get it. the power can still be made safely without it as long as he watches the fuel level thats all i was getting at
 
#23 ·
I'm not rich by any stretch of the imagination. Sorry if I came off as rude, but for years I always read posts like this where people spend all this money on good gear and then skimp out on a few hundred dollars at the end. If he can save up 1800 for the blower, then he can save up a few hundred for a decent fuel set up is all.
 
#22 ·
jivepepper said:
The title is what is the best, and the best for that setup would be the 03-04
Cobra setup. I used an Aviator for a while.
yes i understand that but 99SaleenS281 didnt need to be rude about it because you can use the cobra pumps without tank as long as you watch the gas level which hes ok with thats all
 
#21 ·
saleen556 said:
A cobra tank and pump would be the ideal setup.He could go with a KB boosta pump and the stock gt pump.There are many guys running it just fine up to 450rwhp.
I'm probably hijacking this a bit, but just on a side note, I have never heard of anyone else with the kind of set-up I'm using.
For about 20-25K miles I've been using the stock GT fuel system w/BAP and 47lbs injectors. But, my bottom end IS forged, and only putting down 393rwhp.
I never mention it to stay out of any flaming, but since it was already mentioned here, there you go.

P.S. I had a really good tuner also.
 
#20 ·
virgil said:
dude we all aint rich like you .you dont know his financial situation . he bought the blower new for 1800. a sweet deal . hes not looking to cheap out but there are other alternatives than the complete cobra swap and thats what hes looking for. there are many 400hp guys not running cobra swap and doing it for a long time. thanks for input he bought cobra pumps and will mod his stock tank. it doesnt get driven that much so he will keep at least a half tank of gas and get a custom tune

The title is what is the best, and the best for that setup would be the 03-04
Cobra setup. I used an Aviator for a while.
 
#19 ·
99SaleenS281 said:
I'm sick of people using this cop-out. He has money to buy the car, money to buy the supercharger, and money for the intercooler. He can find the freakin' money for a simple fuel pump and tank. Do things right the first time. Tell him not to be a cheap-ass and stop trying to cut corners. $100 now will save $1000 in the future.
dude we all aint rich like you .you dont know his financial situation . he bought the blower new for 1800. a sweet deal . hes not looking to cheap out but there are other alternatives than the complete cobra swap and thats what hes looking for. there are many 400hp guys not running cobra swap and doing it for a long time. thanks for input he bought cobra pumps and will mod his stock tank. it doesnt get driven that much so he will keep at least a half tank of gas and get a custom tune
 
#18 ·
99SaleenS281 said:
I'm sick of people using this cop-out. He has money to buy the car, money to buy the supercharger, and money for the intercooler. He can find the freakin' money for a simple fuel pump and tank. Do things right the first time. Tell him not to be a cheap-ass and stop trying to cut corners. $100 now will save $1000 in the future.


what kind of fuel system should he go with then???
 
#17 ·
virgil said:
ya he doesnt realy have that kind of money to do the cobra tank and pumps set up thats why i was loking for other alternatives
I'm sick of people using this cop-out. He has money to buy the car, money to buy the supercharger, and money for the intercooler. He can find the freakin' money for a simple fuel pump and tank. Do things right the first time. Tell him not to be a cheap-ass and stop trying to cut corners. $100 now will save $1000 in the future.
 
#15 ·
LaserRed is correct - I'm talking about the way the internal components in the GT tank are designed vs. the way the '03 Cobra tank is designed. The BAP works really good when fuel is available for the pump to suck.

Nice Pics 2000AtlanticGT! Illustrates the point very well!!
 
#14 ·
saleen556 said:
I am not sure I am following you Don.Are you talking about not having enough fuel in the tank for the pump?I have the cobra setup with a boosta pump and understand I am good for 550-600rwhp other than bigger injectors.Are you saying the boost pump is not a good way to go?
I think he's talking about the basket in the GT tank getting sucked dry. Correct me if I'm wrong Don.
 
#13 ·
Don 95Vert said:
I've seen a lot of 450 RWHP GTs with stock tanks and BAPs too - but I also have lots of aborted datalogs showing pressure drop across the injectors for cars with that setup (and after the tank and pumps were swapped) and in each case you can see it dropping dangerously low - sometimes the pulsewidth is increased by the processor to compensate, sometimes it doesn't cut it and it goes very lean, very fast. Because no matter the pump capacity, if the fuel can is too small, it'll get sucked dry. There are a number of really lucky people who may use a stock GT setup with a BAP, but looking at the data, it's just plain scary. BAPs work great, but if the fuel isn't there to pump - it can't do anything. The other thing is there will be more load on the car on the street/strip vs. the dyno, so it'll be worse when driving it. Considering you are already past the HP limit of the stock low end at 450 RWHP, going lean like this makes it a lot worse. If you spend the $$ on a blower, you need to include the cost of a fuel system upgrade or don't do the blower. Band-aids are not good when it comes to this. It'd really suck to get your new blower on and fry a piston because you run out of fuel.

Don
I am not sure I am following you Don.Are you talking about not having enough fuel in the tank for the pump?I have the cobra setup with a boosta pump and understand I am good for 550-600rwhp other than bigger injectors.Are you saying the boost pump is not a good way to go?
 
#12 · (Edited)
montystang said:
if i buy a brand new one do i need anything else besides the tank or do u have to get a basket for it, im not sure thats why im asking
There is no basket in the 03/04 Cobra tank like the GT tank, but the 03/04 Cobra fuel pump assembly (not just the pumps) comes with the filter sock, wiring, fuel lines from pumps to lid, and the fuel tank lid that bolts the pumps into the tank. 03/04 Cobra pump assembly look like this (on the left). The other pump is a '99 Cobra but the basket that we are talking about in the GT looks like the one shown for the '99 Cobra.

Image


The tank will come complete, but you will need to remove the two vacuum canisters (blue) and attached lines that are on your GT tank and transfer them over to the Cobra tank. Here is a pic of my Cobra tank that might help you see what I am talking about. I was lucky enough to find a completed tank/pump set-up ready to install in the car. On some years the GT plug is different than the Cobra plug for the fuel pumps so you have to do some minor wiring at the plug but you need to talk to someone else about this. I am not sure of the details.

Image


For reference, here is a pic of the GT tank that came out of my car. You can see the basket in the tank that we are all talking about in this picture, too.

Image
 
#11 ·
I've seen a lot of 450 RWHP GTs with stock tanks and BAPs too - but I also have lots of aborted datalogs showing pressure drop across the injectors for cars with that setup (and after the tank and pumps were swapped) and in each case you can see it dropping dangerously low - sometimes the pulsewidth is increased by the processor to compensate, sometimes it doesn't cut it and it goes very lean, very fast. Because no matter the pump capacity, if the fuel can is too small, it'll get sucked dry. There are a number of really lucky people who may use a stock GT setup with a BAP, but looking at the data, it's just plain scary. BAPs work great, but if the fuel isn't there to pump - it can't do anything. The other thing is there will be more load on the car on the street/strip vs. the dyno, so it'll be worse when driving it. Considering you are already past the HP limit of the stock low end at 450 RWHP, going lean like this makes it a lot worse. If you spend the $$ on a blower, you need to include the cost of a fuel system upgrade or don't do the blower. Band-aids are not good when it comes to this. It'd really suck to get your new blower on and fry a piston because you run out of fuel.

Don