Max Power Side Mount And Factory Fuel Pump Can Handle!?!?!?

[jordanlisa69]

right ive been told by some performance shops to upgrade my fuel pump and get a front mount. i think they are just trying to sell me stuff my car doesnt need right now.

the mods so far are only free flow exhaust, big poddie, turbo tech boost T at 7psi.

im about to get a mines so i can run over 10psi because of r&r.

i live in Christchurch, New Zealand where it barely reaches double figures.

so with hot air not being an issue how much power or psi could the side mount handle?

also whats the max power the standard fuel pump can handle?

sorry couldnt find anything about the pumps in search.

[Moodles2]

The stock pump is what, 12-15 years old by now? I would change it anyway, no guarantee it will take the extra power your asking from it. A new (I stress brandnew) stock GTR pump can handle about 260-280kw max, GTS-t's I would imagine the figure is abit lower.

Don't get a Mine's ECU, they are tuned for 100 RON jap fuel. All Skyline sidemounts heatsoak up badly, I wouldn't put more than 200kw through a R33 one.

It's not a matter of how much power the side mount can handle, it's how much your stock turbo can handle, which is not more than 10psi.

I hope this answers your questions.

[Black_CSR]

Replace the sidemount with a R34 Sidemount!!! direct bolt on and is good combo with the stock turbo if ur boosting it up.

[KiwiRS4T]

The issue with the fuel pump is not how much it can pump but that it is old. Just get a new Walbro and wire it to full battery voltage. Then upgrade your smic to an R34 one - you can get them for $100 and its a job you can do yourself - and spend your money on a rechipped ecu tuned on your car from EFI ( or ask them if they can retune your Mines ecu - if not ...ditch it).

I have made 220kw with a sidemount - your next limitation is the stock turbo which you should limit to 10 -12psi so no need for a fmic until you upgrade the turbo.

[jordanlisa69]

i will probly upgrade the fuel pump at some stage then. i heard that the walbro isnt a very good pump? my mate with the 20det bema has one and it starts to cut out even with the mines when it gets to quarter of a tank left. so we put 30bucks in and shes all good. so whats up with that? i got told walbros can do that sort of thing.

but im going to stick to the mines because my mate got one for his rb20det 525 BMW and holy crap! that thing is insanely quick now. did a straight warm up with standard ecu, boosted alot, then put the mines in, reset it, and noticed a huge amount of difference. it felt like a totally different car. so im goin to try the mines out for my car because its the only thing a can afford atm..

but anyway i thought that 14psi is max to put through a standard turbo and 12psi is safe?

this is all im looking to do, turn the boost from 7psi to 12psi. and i will be happy.

i can feel when the side mount gets heat soak because on hot summer days here i took my car out on the track and on the trip there i was having a we spike now and again but when it was fully heated up and started doing some laps there was no spike and car was slower. but now its winter i wont be getting near heat soak as it starts to freeze at 7oclock at night haha.

and i always use 98octane so in temps like these shouldnt have an effect compared to 100ron over in jap. should it?

[mad082]

the problem your mate is getting with the fuel surge is due to how the pump is mounted, not due to the pump itself. it obviously isn't mounted low enough and then once the fuel gets low and you start going over bumps and round corners the fuel is sloshing away from the pump and it can't pump any fuel.

as for the side mount, in winter it will be ok as the colder temps will limit heat soak, but going to a fmic would be better.

about the mines ecu, they are just a genericly tuned ecu with things like air flow cut and speed cut removed. while you will get a bit more power, it isn't always safe power. it may be running too much timing and you might be getting a bit of pinging. just be sure to put it on a dyno after you put it on to get the AFR's checked.

[BezerkR32]

ive seen the liitle plastic dowl on the bottom of the pump break off where the sock mounts creating an air leak causing similar issue.

as for the intercooler, the 34 side mount is the best option. cheap front mount kits with the long piping are worse than the standard one.

the problem your mate is getting with the fuel surge is due to how the pump is mounted, not due to the pump itself. it obviously isn't mounted low enough and then once the fuel gets low and you start going over bumps and round corners the fuel is sloshing away from the pump and it can't pump any fuel.

as for the side mount, in winter it will be ok as the colder temps will limit heat soak, but going to a fmic would be better.

about the mines ecu, they are just a genericly tuned ecu with things like air flow cut and speed cut removed. while you will get a bit more power, it isn't always safe power. it may be running too much timing and you might be getting a bit of pinging. just be sure to put it on a dyno after you put it on to get the AFR's checked.

[waxracing]

Nissan felt the need to go for a front mount on the gtr at 206kw

[wolverine]

No, they felt the urge for much higher levels of power.

[jordanlisa69]

the problem your mate is getting with the fuel surge is due to how the pump is mounted, not due to the pump itself. it obviously isn't mounted low enough and then once the fuel gets low and you start going over bumps and round corners the fuel is sloshing away from the pump and it can't pump any fuel.

as for the side mount, in winter it will be ok as the colder temps will limit heat soak, but going to a fmic would be better.

about the mines ecu, they are just a genericly tuned ecu with things like air flow cut and speed cut removed. while you will get a bit more power, it isn't always safe power. it may be running too much timing and you might be getting a bit of pinging. just be sure to put it on a dyno after you put it on to get the AFR's checked.

yea its mounted in the boot and you can see it in the boot so thanks for that we will have to move it around a bit.

and i will definitely be going for a power run to check those afr's and want to see how much power it puts out too.

[jordanlisa69]

and as for the front mount, why is it that subarus dont come factory with them? they come with 206kw and they dont need a front mount. one of my mates would be putting out around 300hp without a front mount at all fours. are their top mounts alot better then the skyline side mounts?

[mad082]

yea its mounted in the boot and you can see it in the boot so thanks for that we will have to move it around a bit.

and i will definitely be going for a power run to check those afr's and want to see how much power it puts out too.

how is it mounted in the boot? does it just have a hose running off it into the bottom of the tank or does it have the stock pump working as a lift pump? if it has the lift pump setup, that may be the cause of the problems.

and as for the front mount, why is it that subarus dont come factory with them? they come with 206kw and they dont need a front mount. one of my mates would be putting out around 300hp without a front mount at all fours. are their top mounts alot better then the skyline side mounts?

the stock top mount intercooler on a subaru is a fair bit bigger than a stock skyline side mount cooler. it is bigger in area (i'd say nearly twice the size), plus it is thicker than the skyline one. even despite the fact that it is in an area that suffers from heatsoak when there is little airflow, the cooler itself is a well designed bit of gear, and it is actually open to much higher airflow than the skyline cooler.

the issue with the stock skyline cooler is due to its size, rather than its flow. it is only a small unit, so in hotter weather, or higher boost levels it will heat up quickly when driven hard and won't be that effective at cooling the intake air. in winter it isn't so much of an issue, especially in new zealand where it is pretty cold. that said, you would still notice a bit of a difference between the stock cooler and a fmic because the fmic is always going to be more effecient at cooling the intake air, and this results in more power.

also the design of the stock cooler is pretty ordinary. in a fmic the air can pretty much flow through the core with minimal direction change, where as the side mount cooler the air comes screaming in, hits a wall and has to go to the side through the core, hits another wall and the has to make another 90 degree turn to get out. while it wouldn't slow it down much, i'd say it would make a bit of a difference.

[waxracing]

oh so you think they put a bigger intercooler in the skyline because it wasnt holding them back or pushing there engine close to the point of detonation.

Edited June 10, 2010 by waxracing

[wolverine]

It is pretty obvious the "206kw" figure was at best a gentlemans agreement.

The R34GT-t comes with a sidemount intercooler, if you have time to do a little research, let me know what the quoted factory output is?

The GTR FMIC was fitted for several reasons including motor racing homologation.

It wasn't required for factory quoted outputs.

[waxracing]

My point is they didn't believe that the side mounted inter-cooler was enough for the engine to survive at the hp figure it came out with and still allow a safety margin that would allow them to not have warranty issues.

So I woyuld say that about 200kw is about the limit I would be happy to run with a side mounted inter-cooler

[jordanlisa69]

My point is they didn't believe that the side mounted inter-cooler was enough for the engine to survive at the hp figure it came out with and still allow a safety margin that would allow them to not have warranty issues.

So I woyuld say that about 200kw is about the limit I would be happy to run with a side mounted inter-cooler

ok thank you for that.

because all im putting through it is going to be 12psi so how much kw power would you expect from a pretty much standard car? besides the mods i mentioned i already have.

[jordanlisa69]

ive checked out the dyno thread for 25dets and i cant really compare them to here because when is it ever 1 degree outside in oz? haha

and with mods like mine im only expecting about 180kw? surely i should be expecting more with the coldness.

[mad082]

My point is they didn't believe that the side mounted inter-cooler was enough for the engine to survive at the hp figure it came out with and still allow a safety margin that would allow them to not have warranty issues.

So I woyuld say that about 200kw is about the limit I would be happy to run with a side mounted inter-cooler

nissan put the front mount on the gtr because it needed to be there from factory for them to be able to run it on the cars once they were built for racing in some classes. this has nothing to do with whether it could handle the 206kw or higher that they were actually putting out. this is so they could handle the 400 or 500kw that they would be putting out once turned into race cars.

ive checked out the dyno thread for 25dets and i cant really compare them to here because when is it ever 1 degree outside in oz? haha

and with mods like mine im only expecting about 180kw? surely i should be expecting more with the coldness.

since it is cold over there, you should easily see 190 to 200kw

[waxracing]

Thats awesome

Where is the paper you read that said that or are you just figuring they did it for that reason

I know they built the skyline to win the group A class, was it part of the class they were not allowed to move the intercooler

I haven't read the rules but I am sure they were allowed to relocate the inter cooler for group A

[mad082]

i don't think they were allowed to move it. pretty sure that's why the aussie gtr's also got an oil coiler. had to be fitted from stock to be able run it in racing.