Club G40 Forum

Technical => Engine and Transmission => Topic started by: dani1326 on January 13, 2011, 09:53:43 pm

Title: What size injectors :/
Post by: dani1326 on January 13, 2011, 09:53:43 pm: Ok so I have an eaton powered g40 and need some bigger injectore but havent a clue what size, here are my mods;

Eaton charger running 19psi
17% smaller charger pulley
Front mout intercooler
4 branch manifold ( full exhaust )
Piper 252* 272* camshaft
Ajustible cam pulley

will be having a custom map once iv got the injectors but can any one point me in the right direction please??
Title: Re: What size injectors :/
Post by: youngprodigys on January 14, 2011, 09:52:24 am: i think red 310cc injectors would be the right size for that. g60 greens which are 250/260 i believe are at 100% duty cycle at high revs on an eaton G.
Title: Re: What size injectors :/
Post by: hayesey on January 14, 2011, 09:55:49 am: I would say if you are aiming for the right side of 200bhp then yeah you definitely want 310cc. But you should speak to whoever is going to remap it before buying anything.
Title: Re: What size injectors :/
Post by: dani1326 on January 14, 2011, 11:10:13 am: Quote from: hayesey on January 14, 2011, 09:55:49 am
I would say if you are aiming for the right side of 200bhp then yeah you definitely want 310cc. But you should speak to whoever is going to remap it before buying anything.

I was going to get PPP to as I was going to buy one of there cam pulleys and map sensor too but iv not been able to get much advice out of them, mostlikly due to the holidays
Title: Re: What size injectors :/
Post by: dani1326 on January 14, 2011, 01:22:29 pm: Off topic but how Many tappets do I need??
Title: Re: What size injectors :/
Post by: hayesey on January 14, 2011, 01:38:21 pm: 8
Title: Re: What size injectors :/
Post by: dani1326 on January 14, 2011, 02:06:32 pm: Quote from: hayesey on January 14, 2011, 01:38:21 pm
8

Fantastic thanks
Title: Re: What size injectors :/
Post by: Andy on January 14, 2011, 06:36:29 pm: With that cam you'd probably get away with 250cc injectors, but I'd recommend 310cc to give you some wiggle room!

If you've been emailing/PM-ing Yoof he's away on holiday at the moment - back in the next couple of days.
Title: Re: What size injectors :/
Post by: dani1326 on January 14, 2011, 07:48:44 pm: Quote from: Andy on January 14, 2011, 06:36:29 pm
With that cam you'd probably get away with 250cc injectors, but I'd recommend 310cc to give you some wiggle room!

If you've been emailing/PM-ing Yoof he's away on holiday at the moment - back in the next couple of days.

310cc it is then, will I need an ajustible pressure regulator?? Any one got a link for the injectors?
Title: Re: What size injectors :/
Post by: Nick_S on January 14, 2011, 08:50:58 pm: I have 250cc and mine is 190hp. When it was mapped, the injectors were not maxing out so I would agree wth above that for 200+ bhp then get the red tops in.
Title: Re: What size injectors :/
Post by: dani1326 on January 14, 2011, 09:27:42 pm: Quote from: Nick_S on January 14, 2011, 08:50:58 pm
I have 250cc and mine is 190hp. When it was mapped, the injectors were not maxing out so I would agree wth above that for 200+ bhp then get the red tops in.

Nice one, any clue where I can get them?? So do we think I'll be running over 200bhp+ with me mods??
Title: Re: What size injectors :/
Post by: Andy on January 14, 2011, 11:08:38 pm: Injector size isn't completely proportional to power output - it very much depends on your hardware too. A low compression motor with a filthy cam will need much more fuel to make the power compared to something higher compression.

The Eatons I've seen in the past have needed fairly large injectors for their power output (e.g. maxxing out 250cc units at 180-190bhp) - but they were running dirty cams.

You might make 200bhp - it'll depend how that cam works with the Eaton. If it makes peak power close to (or over) 7000rpm, then the power numbers will be fairly high. I don't think the Shrick is that lairy a cam though.
Title: Re: What size injectors :/
Post by: Andy on January 14, 2011, 11:09:32 pm: Oh, and use the stock fuel pressure regulator.
Title: Re: What size injectors :/
Post by: dani1326 on January 14, 2011, 11:14:04 pm: Quote from: Andy on January 14, 2011, 11:08:38 pm
Injector size isn't completely proportional to power output - it very much depends on your hardware too. A low compression motor with a filthy cam will need much more fuel to make the power compared to something higher compression.

The Eatons I've seen in the past have needed fairly large injectors for their power output (e.g. maxxing out 250cc units at 180-190bhp) - but they were running dirty cams.

You might make 200bhp - it'll depend how that cam works with the Eaton. If it makes peak power close to (or over) 7000rpm, then the power numbers will be fairly high. I don't think the Shrick is that lairy a cam though.

The camshaft powerband is 1500-6500

http://www.jabbasport.com/store/index.php?app=gbu0&ns=prodshow&ref=BFI-30 are these the ones I need??
Title: Re: What size injectors :/
Post by: dani1326 on January 15, 2011, 03:27:10 pm: Quote from: Andy on January 14, 2011, 11:09:32 pm
Oh, and use the stock fuel pressure regulator.

Thanks man, your all legends!!! Are those the injectors I need above??
Title: Re: What size injectors :/
Post by: Andy on January 15, 2011, 07:42:03 pm: £50 an injector - ouch!
Title: Re: What size injectors :/
Post by: Jezza-7 on January 15, 2011, 08:58:47 pm: Quote from: Andy on January 15, 2011, 07:42:03 pm
£50 an injector - ouch!

Ditto
Title: Re: What size injectors :/
Post by: dani1326 on January 15, 2011, 10:34:12 pm: Quote from: Andy on January 15, 2011, 07:42:03 pm
£50 an injector - ouch!

Well iv found some 330cc injectors but dunno if they will be too much

If they are, well are the ones on the Jabba sport website the ones I need??
Title: Re: What size injectors :/
Post by: Andy on January 16, 2011, 08:35:18 am: If you're not in a hurry we could supply some 310cc injectors fully cleaned and tested for much less than the Jabba price.
Title: Re: What size injectors :/
Post by: dani1326 on January 16, 2011, 10:29:34 am: Quote from: Andy on January 16, 2011, 08:35:18 am
If you're not in a hurry we could supply some 310cc injectors fully cleaned and tested for much less than the Jabba price.

That sounds good to me, how much we talking and how long of a wait??