Need more HP, water/methanol injection - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

moses · 06-22-2009, 02:01 AM

Hey guys I got a sr with a gt2871r w/ 64 trim with all supporting mods and jwt j3 cams. I dynoed at 356hp and I need a little more power to beat a friend. I got the intake and exaust done so all I have left to do is build the engine but I dont really want to yet. I was thinking of doing a water methanol injection but I dont know much about it. I know it will cool the combustion chamber which means I can up the boost but I dont know how to tune for it and what my air/fuel ratios to be safe would be. I guess what I am asking is how much power could I get out of it and how would I tune for it since I have a afc neo and a wideband o2 sensor? Can anyone help me out?

whereda40at · 06-22-2009, 02:49 AM

its not just about power. you also have to do something with your suspension, trans, rear, and tires. get your power to the ground first.

*fliprayzin240sx* · 06-22-2009, 07:08 AM

You want a lil bit more? Get rid of the SAFC and get a PFC or a standalone and you'll squeeze more power out of the setup...

Blacksilvy · 06-22-2009, 07:38 AM

Here is my reply to a question such as this when this turbo and cams are involved for more power

400 whp Stock block Redtop - GT2871r .64 power!: SR20DET Forum (rear-drive): Nissan Forums / Infiniti Forums - NICOclub
PM the member for more info, enjoy

moses · 06-22-2009, 04:29 PM

I forgot to mention that I have a JWT tuned ecu that was close to perfect and the afc neo is just to adjust it a little. I have 275 azenis on back with a non turbo z32 rear end. I plant for the most part but I really just wanted the power for freeway runs. I turn the boost down everywhere else. I dont normally run from a dig on the streets because I just don’t feel safe and I plan on getting drag radials for the track. I am building the car for the track so the coilovers are hurting my traction but I don’t mind. I basically have the same setup as codyace on that website (its where i got the idea) except i dont have an upgraded exaust manifold. I wonder how much that will help? I read somewhere that engines that run with water/ethanol injection had cleaner motors too. That is one of the reasons I thought it would be a good idea. Thanks for the responses.

BlazedGlory · 06-22-2009, 04:49 PM

I'm assuming you are tuned for pump gas?

s13silvia123 · 06-22-2009, 04:57 PM

get a standalone like a PFC and get rid of your SAFC

jr_ss · 06-22-2009, 07:17 PM

PFC or bigger turbo...

moses · 06-23-2009, 12:53 AM

It is tuned for pump gas. So I take it people either dont like the water/ethanol injection idea for a little more hp or people dont know how to tune for it. Alright ill see what else i can do. I guess I will try it when I get back and ill let you guys know how it goes.

VQMaxFan · 06-23-2009, 01:10 AM

You need a standalone to really reap the benefits of water/meth. You can run allot more timing w/ it. Which is where you make the power. Atleast thats what ive read about so far about the subject. Of course you could turn up the boost and try to monitor knock. I was looking into methanol injection but im in the same boat as you. Rom tuned ecu w/ piggyback. Im just going to use nitrous and race gas lol.

BlazedGlory · 06-23-2009, 04:20 PM

Yeah I pretty much agree with everyone here, and I have water/methanol injection on my SR. Get a standalone first. With a good tuner you will probably gain a fair amount of power even on pump gas. If you only want a little more power for a random race maybe get a race gas tune also on your standalone. Even if you go water/meth for more power all the time, a standalone will be the best idea to tune with.

moses · 06-23-2009, 05:51 PM

Ok I understand. I guess I will start saving up. Thanks guys

06-22-2009, 02:01 AM	#1
moses Zilvia Junkie Join Date: Mar 2005 Location: Jacksonville, ar Age: 38 Posts: 555 Trader Rating: (2) Rides Gallery: moses Feedback Score: 2 reviews	Need more HP, water/methanol injection Hey guys I got a sr with a gt2871r w/ 64 trim with all supporting mods and jwt j3 cams. I dynoed at 356hp and I need a little more power to beat a friend. I got the intake and exaust done so all I have left to do is build the engine but I dont really want to yet. I was thinking of doing a water methanol injection but I dont know much about it. I know it will cool the combustion chamber which means I can up the boost but I dont know how to tune for it and what my air/fuel ratios to be safe would be. I guess what I am asking is how much power could I get out of it and how would I tune for it since I have a afc neo and a wideband o2 sensor? Can anyone help me out? __________________ Thats what I said

06-22-2009, 02:49 AM	#2
whereda40at Zilvia FREAK! Join Date: Mar 2007 Location: where 240's are few and far between Age: 37 Posts: 1,039 Trader Rating: (3) Feedback Score: 3 reviews	its not just about power. you also have to do something with your suspension, trans, rear, and tires. get your power to the ground first. __________________ WORLDS FASTEST T-2 TURBO 240 ON 93 OCTANE! 10.79 @ 124 MPH WITH A 1.48 60'

06-22-2009, 07:08 AM	#3
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	You want a lil bit more? Get rid of the SAFC and get a PFC or a standalone and you'll squeeze more power out of the setup... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

06-22-2009, 04:29 PM	#5
moses Zilvia Junkie Join Date: Mar 2005 Location: Jacksonville, ar Age: 38 Posts: 555 Trader Rating: (2) Rides Gallery: moses Feedback Score: 2 reviews	I forgot to mention that I have a JWT tuned ecu that was close to perfect and the afc neo is just to adjust it a little. I have 275 azenis on back with a non turbo z32 rear end. I plant for the most part but I really just wanted the power for freeway runs. I turn the boost down everywhere else. I dont normally run from a dig on the streets because I just don’t feel safe and I plan on getting drag radials for the track. I am building the car for the track so the coilovers are hurting my traction but I don’t mind. I basically have the same setup as codyace on that website (its where i got the idea) except i dont have an upgraded exaust manifold. I wonder how much that will help? I read somewhere that engines that run with water/ethanol injection had cleaner motors too. That is one of the reasons I thought it would be a good idea. Thanks for the responses. __________________ Thats what I said

06-22-2009, 04:57 PM	#7
s13silvia123 Post Whore! Join Date: May 2006 Location: where waldo is Age: 43 Posts: 3,267 Trader Rating: (16) Feedback Score: 16 reviews	get a standalone like a PFC and get rid of your SAFC __________________ 18g and 20g turbo users click on me http://zilvia.net/f/tech-talk/261219-18g-20g-turbo-users.html

06-22-2009, 07:38 AM	#4
Blacksilvy Leaky Injector Join Date: Apr 2008 Location: Louisville, KY Age: 37 Posts: 61 Trader Rating: (1) Feedback Score: 1 reviews	Here is my reply to a question such as this when this turbo and cams are involved for more power 400 whp Stock block Redtop - GT2871r .64 power!: SR20DET Forum (rear-drive): Nissan Forums / Infiniti Forums - NICOclub PM the member for more info, enjoy

06-22-2009, 04:49 PM	#6
BlazedGlory Zilvia Junkie Join Date: Jan 2003 Location: Canton, GA Posts: 370 Trader Rating: (1) Feedback Score: 1 reviews	I'm assuming you are tuned for pump gas?

06-22-2009, 07:17 PM	#8
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,415 Trader Rating: (35) Feedback Score: 35 reviews	PFC or bigger turbo... __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.

06-23-2009, 12:53 AM	#9
moses Zilvia Junkie Join Date: Mar 2005 Location: Jacksonville, ar Age: 38 Posts: 555 Trader Rating: (2) Rides Gallery: moses Feedback Score: 2 reviews	It is tuned for pump gas. So I take it people either dont like the water/ethanol injection idea for a little more hp or people dont know how to tune for it. Alright ill see what else i can do. I guess I will try it when I get back and ill let you guys know how it goes. __________________ Thats what I said

06-23-2009, 01:10 AM	#10
VQMaxFan Zilvia Junkie Join Date: May 2008 Location: Mobile AL Age: 35 Posts: 464 Trader Rating: (3) Feedback Score: 3 reviews	You need a standalone to really reap the benefits of water/meth. You can run allot more timing w/ it. Which is where you make the power. Atleast thats what ive read about so far about the subject. Of course you could turn up the boost and try to monitor knock. I was looking into methanol injection but im in the same boat as you. Rom tuned ecu w/ piggyback. Im just going to use nitrous and race gas lol.

06-23-2009, 04:20 PM	#11
BlazedGlory Zilvia Junkie Join Date: Jan 2003 Location: Canton, GA Posts: 370 Trader Rating: (1) Feedback Score: 1 reviews	Yeah I pretty much agree with everyone here, and I have water/methanol injection on my SR. Get a standalone first. With a good tuner you will probably gain a fair amount of power even on pump gas. If you only want a little more power for a random race maybe get a race gas tune also on your standalone. Even if you go water/meth for more power all the time, a standalone will be the best idea to tune with.

06-23-2009, 05:51 PM	#12
moses Zilvia Junkie Join Date: Mar 2005 Location: Jacksonville, ar Age: 38 Posts: 555 Trader Rating: (2) Rides Gallery: moses Feedback Score: 2 reviews	Ok I understand. I guess I will start saving up. Thanks guys __________________ Thats what I said

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