Hi guys,

quick question - is my Walbro and current ID setup good for 500WHP? I'm aiming for 16-18PSI of boost on my Novi1200. I also have the stock FRP.

Currently have 14psi on my Novi1000 and 420whp with 60% duty.

I don't really want to start rewiring things or anything so will an uprated FPR suffice? Any recommendations?

 

Depends on what fuel. For 500whp you will be fine if you use race gas like 100 octane/ 110ocrane/c16/q16. Id1000s and a walbro 255 typical support about 600whp on race gas not e85. But no one really runs race gas now days with the low cost and avalibity of e85. But since e85 requires 30% more fuel Id 1000 and a walbro 255 will only support 450-500whp on stock fuel pressure. You may reach you 500whp goal on e85 if you get a bigger fuel pump and an adjustable fuel pressure regulator and just up the base fuel pressure so the injectors can flow more.

 

I don't have easy access to E85 here in New Zealand so I'd be running 98 octane which I believe is the equivalent to your 93.

So can I get away with another fuel pressure regulator? Or maybe an inline fuel pump of some sort? I've done a search but there seems to be a lot of contradictory opinions.

 

Well with 93 octane you won't have the issue of running out of fuel but you will be octane limited. It's not realistic to be able to make over 500whp on low octane fuel because of engine knock and detonation. The issue with you goal of 500whp is not fuel flow from the injectors or fuel pump but the issue is the low quality if fuel your useing which will not support high boost pressure which in turn will not hit your goal of 500whp.

 

You should make about 450 depending on turbo size. Stock fpr Walbro 255 and id1000. I run a s363 and made 450 with that fuel setup on a dnyo dynamics dyno. If you run a smaller turbo it wont peak as high on power.

 

stock 310 are 90% for 210-220 whp, so say 500whp @ 80 duty one would need ~830cc inj,
830cc inj @ 80% duty is 252 lph.
that is for 93oct.
i dont see why everyone is matching walbro 255 to 1000cc, it can only service 800cc realistically.
all numbers *1.3 for meth

 

thanks - it will be a Novi 1200 supercharger not a turbo.

So my Walbro is the weak link - will it be less capable though with the additional pressure in the fuel rail?

I'm going to lower my rev limit to 8700 too.

 

the weak link is your fuel. You will not come close to maxing out 1000cc injectors and a walbro 255 on normal 91/92/93 octane pump fuel.

expect to make between 400-450whp. You will not be able to boost higher or make more power not because of the flow of the fuel system but because of the low octane fuel.

 

OEM injectors are 360cc. At least the 00-05 are. Not 100% positive on DBW.

 

Thanks - My car will be boosing 16+ regardless though, can this safely be controlled with ignition timing as I won't have a wastegate or anything?