I'm currently getting my parts together to run around the 420 mark with a md321t and 650 injectors. Plus other mods!! Question is will a fpr be needed or am I ok at this level???
Dont want it to hold me back on power
Thanks


Craig

 

i'm not running one, but i will add one in the future.

You can get the power you are after without one. If you want some extra safety, then yes get one.

Although i don't see much point of adding a FPR if you are not adding parallel fuel rails.

 

Not needed but I put one on to be on the safe side. Especially if running parallel fuel rails as said above.

 

So what do parallel fuel rails do?? Are they needed for my build???? I'm on standard internals on a 05 sti uk

 

Again its up to you if you want to play safe. (looking at the engine from the front of the car)Normally fuel gets to the cylinders in this order:

back right
front right
front left
back left

and then back to the tank. When fuel reaches the last cylinder, it has lost some pressure. By upgrading to parallel fuel rails, you are ensuring that all cylinders get fuel equally.

 

Thanks for that... They cost much???
And do I use the top feed injectors still

 

Yes, you still use top feed injectors.
They are £175 from lateral performance. Up to you if you want to fit them, you could just wait for a second hand set to pop up.

HTH

 

Bet it will need remap though???

 

make em yourself, quite easy tbh

you will need a a pipe flarer, 2 3 way splitters and good petrol hose. havent done it on a newage did it on my classic when it was rebuilt, trouble is you need to take the inlet off really

it will need to be checked rather than a remap and the fpr will have to be set-up, if your set-up is running ok , i wouldnt bother

 

yep, just a tweak. Probably worth doing a few other mods at the same time so the tweak is worth it.

 

I might not bother then. Will it hold me back or just run lean?

 

Neither mate. It is only a safety precaution. Mine is making over 430bhp guesstimated at 1.6 bar on standard rails and regulator and not running lean. figures are a bit low as heads not working. faulty NPS.

 

What injectors you running Tazz.

 

740cc mark. denso re-flowed.

 

Would like a trip out in your motor bud.

 

Definately mate, can't make this months meet, but will hopefully be there on the big feb one H is planning.

 

Goodo o, you know more than me then about Feb.