Talk to me people. Whats the difference? Application - to increase the FP in my mk2 to reach the power application of the turbo. Currently maxed out FP. As far as i can see, swirl pot and surge tank do basically the same thing for fuelling - only the swirl pot = external pump/external filter. Surge tank = internal pump/filter. Both have 4 lines - 1 x Output to Engine, 1 x Return from Engine 1 x Return to tank and 1 x out from tank. Can't see any other differences, am i missing something? I can get a surge tank, have an internal 400litre pump already. Hook that up inside. Then 4 AN lines and go from there. Run it to the fuel rail via a FPR and set my pressure rate for flow (3-4 bar) and i can map the car to the point i need. Vs setting up a swirl pot which needs external pump/filter/bracket. But pretty much then the same set up. Does that sound about right OR am i way off the mark? Crazy that you need this set up in a small hatch to just run over 300hp?! KTec and RS Tuning are asking over a grand to fit one. That seems crazy to me. So will give it a go myself, Or at least the tank/pump and lines, running them i may leave to the professionals for a tidy/safe job. Cheers Steve
Hi Steve Unless your wanting to run 500hp plus, in my opinion you are wasting your money. Need to know a bit more on what has been done to your engine really. If your running a hybrid turbo, 630cc injectors, not forged, then a DW65c in tank pump is more than enough for your needs. My R26 is forged, Borg Warner 6758 turbo, mk3 fuel rail, 5 bar in tank regulator and a DW65c in tank fuel pump, ran this same setup on my 265 without any issues at all @400hp. Swirl pots with the extra pumps are quite noisy. BTW
Hey Ian Thanks for the response. Appreciated. It's a mk3 engine that's fully forged running 630cc injectors on billet rail, hybrid stage 2 turbo. It's got a mk3 pump assembly running a DW pump (think it's 365lph or 400). Standard regulator though. Aiming for 360/370 bhp. Ktec got it on the dyno in November to make some map adjustments. They limited it at 330 as they didn't have the fuel pressure. It made 346 previously but the injectors were running 99% and lean up top. We had been hoping for more. Hence the map tweak. I was told that i need to increase the fuel pressure and would need a fpr and swirl pot/surge tank to do so. So just exploring the options as the current quote is over £1300. Hoping to do it myself to save the money. Any advice would be welcome. Cheers.
No, you don't need to waste time and money on a swirl pot. All you need is a modified fuel pressure regulator for the tank unit, i have done a few of these now, if you need one i can help you out. With this setup your turbo will be the limiting factor, you will need a bigger turbo after that. I have spoken to Chris at EFI and with mine (with 182 cams) he said i should be looking around the 440hp mark, we will see
If you can help me out that would be great? The turbo is a stage 2 hybrid 20t - so i think good for about 380 i think. Beyond that it would likely be a bigger blower and tubular manifold as the stock cast one is also limiting. I would love to see over 400 but as its built to be almost a very fast daily and not a track car i'm not sure if i'd be crazy going for that 440hp sounds very nice though!
I've got one, but not fitted as yet, I'd need that to limit the pressure from the higher regulator in tank right?
As Ian said above 5bar intank and rising rate 250 fuel rail will be more than ample. Mine had plenty of fuel with that setup, 630cc injectors and dw65c fuel pump @ 378hp. Ian modified a 5bar reg for me and it works excellent. Only need a fuel system when its a dedicated track car really. Road use wouldnt bother. Id also personally take the trip to Efi for mapping myself.
Hi Jon i think the setup that i suggested is capable of close to 500hp with the flow and pressure from the DW65c. This setup is what i have in my car and thats a track only car, although i drive it to and home (mostly)from a track.
Appreciate the input and help. The 380hp mark is about where I'd like to be. Tbh as long as I'm seeing over 350 I'm happy. I was disappointed initially with a fully forged engine and hybrid stage 2. Given I'd see MK3's make only a few horsepower less with a stock engine and turbo. So yeah thanks Ian. Appreciate the help.
I get fuel surge, but it only really happens at Spa, keep it above 1/3rd of a tank and all is good, not had any problems at UK tracks, but normally i don't let it go under 1/4
