Injectors 800cc?

[S3Zek]

I'm trying to find out what injectors i need and the best place & price to get them, What size and make do you guys run for 400-500hp? Would I be right in thinking 800cc? Many Thanks

 

[Andrew@A.L.D]

870's for me at 440bhp so far but still have loads more to go, i would like to see near 600

what spec of engine will it be

welly is on 630's

 

[S3Zek]

Rods pistons, arp stud and nut arp mains, large port head, superteck valve gear, large front mount, in line fuel pump, top mount mani with poss a gt3071r or there abouts so 400+ is what I would like if it is poss from that

 

[Andrew@A.L.D]

arp's main and head studs are a bit over kill but you might want to get some uprated valve springs

Welly is running standard gear on a 440 bhp with 630 cc also, his is a good example of what the standard stuff can cope with

 

[BuuBBa]

870's for me at 440bhp so far but still have loads more to go, i would like to see near 600

870's with 100% duty cycle can take You around 540hp..

 

[Andrew@A.L.D]

That's at 3 bar they will do that

I do have a 4 bar fpr and a adjustable one that goes upto 5 bar so I still have more

 

[BuuBBa]

Yep.. With 4bar those flow about 920cc. What pumps You are running?

 

[badger5]

870's with 100% duty cycle can take You around 540hp..

hmmmm
mine was max'd out a little less than that in practice on 870cc @ 3bar
bsfc calc a little skewed

 

[Andrew@A.L.D]

Yep.. With 4bar those flow about 920cc. What pumps You are running?

standard in tank pump and performance inline one also

 

[jamieA3]

Rods pistons, arp stud and nut arp mains, large port head, superteck valve gear, large front mount, in line fuel pump, top mount mani with poss a gt3071r

how do you enter that on confused.com quotes lol

 

[badger5]

stock S3 pump flows 3.3ltr/min no load
bare this in mind if not using a swirl pot as a buffer capacity

 

[badger5]

Rods pistons, arp stud and nut arp mains, large port head, superteck valve gear, large front mount, in line fuel pump, top mount mani with poss a gt3071r

how do you enter that on confused.com quotes lol

gt3071 620cc is adequate..

 

[Andrew@A.L.D]

stock S3 pump flows 3.3ltr/min no load
bare this in mind if not using a swirl pot as a buffer capacity

Do you recommend a swirl pot for my set up?

 

[BuuBBa]

hmmmm
mine was max'd out a little less than that in practice on 870cc @ 3bar
bsfc calc a little skewed

At which power in practice? Just curious..
I used bsfc .63 and meant crank hp.

 

[BuuBBa]

standard in tank pump and performance inline one also

Please specify this "performance inline pump".

 

[Andrew@A.L.D]

Please specify this "performance inline pump".

DA-31 Tuffty is also using one in his

 

[S3Zek]

gt3071 620cc is adequate..

should I go a little bigger just to be on the safe side?

 

[S3Zek]

Rods pistons, arp stud and nut arp mains, large port head, superteck valve gear, large front mount, in line fuel pump, top mount mani with poss a gt3071r

how do you enter that on confused.com quotes lol

Lol will soon find out in a few months must admit I'm not looking forward to the responses lol,
How much bhp in ur a3 sir!!!!!.......is it for the road?!!!!! Lol

 

[superkarl]

should I go a little bigger just to be on the safe side?

adequate probably means 10-15% headroom, which i think is what you should run at for egt protection and incase of any problems.
so im sure bill has taken that into account in sayng 620 is adequate. i suppose it depends whether you might get bored and want more. but even bigger injectors can upset driveability, or so i've read.

 

[S3Zek]

Ok, cool thanks for that.

 

[badger5]

Do you recommend a swirl pot for my set up?

you're on stock fuel rail I guess?
I would be checking fuel pressure @ rail when doing the max power runs on your 550+bhp aims
thats a lot of fuel demand through a 6mm ID fuel line