injectors too big ? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

eklips3 · 01-31-2010, 02:18 PM

alright so this just came across my mind and i have to ask you guys.

I've been building my RB20 over time with a good plan but i ran out of funds, so now im not able to get a big turbo for it right now but i will eventually. Anyways i have a set of 750cc injectors and im wondering if they will be possibly too much to run with a stock turbo.

the only thing im thinking right now is that will run at a very low duty cycle which cant be bad. unless you guys have some input for me it would be greatly appreciated.

Thanks.

lok · 01-31-2010, 02:24 PM

if you cant afford the turbo.

you probable cant afford the tuning.

eklips3 · 01-31-2010, 02:37 PM

Quote:

Originally Posted by lok

if you cant afford the turbo.

you probable cant afford the tuning.

already have the tuning.
AEM EMS

KoukiMonsta · 01-31-2010, 02:42 PM

well with an fpr and tuning should be fine w/ those injectors

steve shadows · 01-31-2010, 02:44 PM

Sure but I would recommend a base map or something to get your started so you don't flood your poor engine with all that fuel.

Sounds like you have the right EMS, you just need some more air to throw at the motor. It's all in the tuning honestly. As long as the maps are setup to adjust fuel out so it runs like stock it should be fine. It will just be a bit richer on idle than stock, although there are some tricks I know through the AEM system to get the idle pretty dead on even with injectors as large at 1000 cc.

eh? · 01-31-2010, 04:00 PM

You should be okay but idle afr may suffer depending on the injector. Look into microsec/bit if you see large swings in afr when idle tuning.

eklips3 · 01-31-2010, 05:42 PM

sweeet thanks alot guys. that clears up pretty much everything

01-31-2010, 02:18 PM	#1
eklips3 Zilvia Addict Join Date: Apr 2008 Location: Calgary Canada Age: 35 Posts: 626 Trader Rating: (3) Feedback Score: 3 reviews	injectors too big ? alright so this just came across my mind and i have to ask you guys. I've been building my RB20 over time with a good plan but i ran out of funds, so now im not able to get a big turbo for it right now but i will eventually. Anyways i have a set of 750cc injectors and im wondering if they will be possibly too much to run with a stock turbo. the only thing im thinking right now is that will run at a very low duty cycle which cant be bad. unless you guys have some input for me it would be greatly appreciated. Thanks. __________________ 1992 240sx (RB20. 362whp@16psi)

01-31-2010, 02:42 PM	#4
KoukiMonsta Nissanaholic! Join Date: Mar 2009 Location: NC Posts: 1,969 Trader Rating: (23) Feedback Score: 23 reviews	well with an fpr and tuning should be fine w/ those injectors __________________ @UpshiftEngineering

01-31-2010, 02:44 PM	#5
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	Sure but I would recommend a base map or something to get your started so you don't flood your poor engine with all that fuel. Sounds like you have the right EMS, you just need some more air to throw at the motor. It's all in the tuning honestly. As long as the maps are setup to adjust fuel out so it runs like stock it should be fine. It will just be a bit richer on idle than stock, although there are some tricks I know through the AEM system to get the idle pretty dead on even with injectors as large at 1000 cc. __________________ Like Me on FaceBook !

01-31-2010, 05:42 PM	#7
eklips3 Zilvia Addict Join Date: Apr 2008 Location: Calgary Canada Age: 35 Posts: 626 Trader Rating: (3) Feedback Score: 3 reviews	sweeet thanks alot guys. that clears up pretty much everything __________________ 1992 240sx (RB20. 362whp@16psi)

01-31-2010, 02:24 PM	#2
lok Zilvia Addict Join Date: Jul 2003 Location: Oklahoma Posts: 816 Trader Rating: (10) Feedback Score: 10 reviews	if you cant afford the turbo. you probable cant afford the tuning.

01-31-2010, 04:00 PM	#6
eh? Zilvia Member Join Date: Apr 2005 Location: Orlando, FL Age: 44 Posts: 283 Trader Rating: (0) Feedback Score: 0 reviews	You should be okay but idle afr may suffer depending on the injector. Look into microsec/bit if you see large swings in afr when idle tuning.