stock sr 370cc max? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

iamwesley · 11-01-2004, 02:40 AM

What do the stock 370cc injectors max out at HP wise?

orion::S14 · 11-01-2004, 06:07 AM

~250rwhp (safely).

- - - - -

370/10.5 = 35.2lbs/min (assume 100% duty cycle, .55 BSFC)

(35.2*4*1)/.55 = ~256rwhp as a MAX.

- Brian

iamwesley · 11-01-2004, 06:39 AM

would 7lbs on a t3/to4e 50 trim be okay on 370cc?

mastaflash05 · 11-01-2004, 07:15 AM

/\ im runing 10 pounds on a t3t4 61 trim stock injectors, walbro, and safc set to richest. hasnt blown up yet.

qvester · 11-01-2004, 07:42 AM

i dynoed at 240rwhp with stock turbo stock mafs at 13.5 psi hit 89% on injector pulse reading so ya

s14 blacktop · 11-01-2004, 08:32 AM

I asked my friend the same question and he said their good up to 300HP at the crank.

tErbo b00st · 11-01-2004, 01:17 PM

Quote:

Originally Posted by orion::S14

~250rwhp (safely).

- - - - -

370/10.5 = 35.2lbs/min (assume 100% duty cycle, .55 BSFC)

(35.2*4*1)/.55 = ~256rwhp as a MAX.

- Brian

can you please explain where those numbers come from. thanks.

and s14 blacktop, your friends an idiot then.

mellojoe · 11-01-2004, 05:14 PM

A good estimate of injector flow:

injector flow in cc / 1.5 = approximate horsepower

370cc / 1.5 = 246 horsepower.

To convert lbs/min --> cc use a factor of 10.5. 370cc / 10.5 = 35lb injectors
50lb injectors * 10.5 = 525cc
72lb = 756cc

approximates

orion::S14 · 11-01-2004, 06:28 PM

Quote:

Originally Posted by tErbo b00st

can you please explain where those numbers come from...

Google - search for "injector flow horsepower fuel pressure" and you'll get a bunch of sites...

www.holley.com has a good page...but there are tons of others with similar info.

TurboSaturns.net has some great info on this stuff as well, check it out.

- Brian

orion::S14 · 11-01-2004, 06:29 PM

By the way, a good "BSFC" to use for a turbo KA or SR is (.55)...

11-01-2004, 02:40 AM	#1
iamwesley Zilvia Member Join Date: May 2003 Location: socal Posts: 150 Trader Rating: (0) Feedback Score: 0 reviews	stock sr 370cc max? What do the stock 370cc injectors max out at HP wise?

11-01-2004, 06:07 AM	#2
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	~250rwhp (safely). - - - - - 370/10.5 = 35.2lbs/min (assume 100% duty cycle, .55 BSFC) (35.241)/.55 = ~256rwhp as a MAX. - Brian __________________ www.KA24DEvelopment.com

11-01-2004, 07:15 AM	#4
mastaflash05 Zilvia Addict Join Date: Dec 2002 Location: Cincinnati OHIO Age: 38 Posts: 769 Trader Rating: (7) Feedback Score: 7 reviews	/\ im runing 10 pounds on a t3t4 61 trim stock injectors, walbro, and safc set to richest. hasnt blown up yet. __________________ GT3582R SR20 Powered S13

11-01-2004, 05:14 PM	#8
mellojoe Zilvia Junkie Join Date: Jan 2004 Location: ARKANSAS Posts: 518 Trader Rating: (0) Feedback Score: 0 reviews	A good estimate of injector flow: injector flow in cc / 1.5 = approximate horsepower 370cc / 1.5 = 246 horsepower. To convert lbs/min --> cc use a factor of 10.5. 370cc / 10.5 = 35lb injectors 50lb injectors * 10.5 = 525cc 72lb = 756cc approximates __________________

11-01-2004, 06:29 PM	#10
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	By the way, a good "BSFC" to use for a turbo KA or SR is (.55)... __________________ www.KA24DEvelopment.com

11-01-2004, 06:39 AM	#3
iamwesley Zilvia Member Join Date: May 2003 Location: socal Posts: 150 Trader Rating: (0) Feedback Score: 0 reviews	would 7lbs on a t3/to4e 50 trim be okay on 370cc?

11-01-2004, 07:42 AM	#5
qvester Leaky Injector Join Date: Dec 2003 Location: Indiana Age: 42 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	i dynoed at 240rwhp with stock turbo stock mafs at 13.5 psi hit 89% on injector pulse reading so ya

11-01-2004, 08:32 AM	#6
s14 blacktop Zilvia Member Join Date: Oct 2004 Location: down south, deep south Age: 44 Posts: 274 Trader Rating: (0) Rides Gallery: s14 blacktop Feedback Score: 0 reviews	I asked my friend the same question and he said their good up to 300HP at the crank.