Need the wiring schematic to install Apexi Neo in my GS4
#1
Need the wiring schematic to install Apexi Neo in my GS4
Guys,
I need to get this damn thing installed already so I can do some before and after dyno runs for my fellow CL pals. Please help if you know where I can find one for a 2000 GS400. I don't want to just use the instructions that came with it. I'm going to a shop that has NEVER installed one of these on a GS. I'm scared...I heard a new ECU wiring harness is over $1000 from Lexus so I don't want any screw ups!
I need to get this damn thing installed already so I can do some before and after dyno runs for my fellow CL pals. Please help if you know where I can find one for a 2000 GS400. I don't want to just use the instructions that came with it. I'm going to a shop that has NEVER installed one of these on a GS. I'm scared...I heard a new ECU wiring harness is over $1000 from Lexus so I don't want any screw ups!
#2
Lexus Fanatic
Nick I installed the NEO into my GS myself. It's not that hard. If you don't want to splice or t-tap the harness you can get a PnP from Boomslang.
http://www.boomslang.us/neo.htm
Call them because the GS4 isn't listed but they can make any harness you want. I've spoken with them in the past. Their very helpful and quick with their CS.
If you want I can help you do it just let me know.
http://www.boomslang.us/neo.htm
Call them because the GS4 isn't listed but they can make any harness you want. I've spoken with them in the past. Their very helpful and quick with their CS.
If you want I can help you do it just let me know.
#3
Nick I installed the NEO into my GS myself. It's not that hard. If you don't want to splice or t-tap the harness you can get a PnP from Boomslang.
http://www.boomslang.us/neo.htm
Call them because the GS4 isn't listed but they can make any harness you want. I've spoken with them in the past. Their very helpful and quick with their CS.
If you want I can help you do it just let me know.
http://www.boomslang.us/neo.htm
Call them because the GS4 isn't listed but they can make any harness you want. I've spoken with them in the past. Their very helpful and quick with their CS.
If you want I can help you do it just let me know.
#4
Just ordered a custom Plug 'n' play harness from Boomslang for my Neo! It will be finished sometime next week then shipped out! I got it for $219 + $10 for shipping. Neo cost me $300 (w/tax and shipping) so I am in this for around $529. Once I get this harness I will install myself (probably mount it in the ashtray) and then off to the dyno shop to do some baseline runs and then post-tune runs. Hopefully I can squeeze out some more power. Place your bets people place your bets...260whp? 270whp? 280whp? Whatever it is I am going to add the S&S headers soon after! I think these things will bring the V8 alive especially with my newly acquired PI TC and Supra TT 3.76 LSD! I need to get this thang movin'...lol. What do you guys think I will pull?
#5
Lexus Test Driver
iTrader: (2)
I think with your current mods you'll probably pull around 239 to 242rwhp if your TM are pretty recent. I think once you install and tune your NEO, you'll be looking at 249 to 254rwhp.
I plan on getting something similar too. I like that pnp devise.
I plan on getting something similar too. I like that pnp devise.
Last edited by Lexizm; 11-01-07 at 06:41 PM.
#6
I don't understand I thought I read on here..actually I know I read on here that a member with a GS400 and just an exhaust (not even an intake, not even a drop-in filter and no TM plugs) had a baseline of 244.58 whp and 241.39 tq. After the install and a professional tune on a dynojet of the SAFC II he was at 260.57 whp and 283.74 tq! +19whp and +42tq!!! Now your telling me that I won't even be able to crack 255whp??? No way, I also have a custom ram air K & N FIPK (in the wheel well; not current setup but I am going to revert back to this when I get the Neo installed) and TM plugs on top of my exhaust. I would think (and hope) I should do the same if not better than this guy. Also, I have read MANY post of baseline (BONE STOCK) GS400's running 240whp and some even up to 245whp...bone stock! I guess we'll have to see but my money is on a higher whp than what you stated...
#7
Lexus Fanatic
Just ordered a custom Plug 'n' play harness from Boomslang for my Neo! It will be finished sometime next week then shipped out! I got it for $219 + $10 for shipping. Neo cost me $300 (w/tax and shipping) so I am in this for around $529. Once I get this harness I will install myself (probably mount it in the ashtray) and then off to the dyno shop to do some baseline runs and then post-tune runs. Hopefully I can squeeze out some more power. Place your bets people place your bets...260whp? 270whp? 280whp? Whatever it is I am going to add the S&S headers soon after! I think these things will bring the V8 alive especially with my newly acquired PI TC and Supra TT 3.76 LSD! I need to get this thang movin'...lol. What do you guys think I will pull?
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#9
Lexus Test Driver
iTrader: (2)
I don't understand I thought I read on here..actually I know I read on here that a member with a GS400 and just an exhaust (not even an intake, not even a drop-in filter and no TM plugs) had a baseline of 244.58 whp and 241.39 tq. After the install and a professional tune on a dynojet of the SAFC II he was at 260.57 whp and 283.74 tq! +19whp and +42tq!!! Now your telling me that I won't even be able to crack 255whp??? No way, I also have a custom ram air K & N FIPK (in the wheel well; not current setup but I am going to revert back to this when I get the Neo installed) and TM plugs on top of my exhaust. I would think (and hope) I should do the same if not better than this guy. Also, I have read MANY post of baseline (BONE STOCK) GS400's running 240whp and some even up to 245whp...bone stock! I guess we'll have to see but my money is on a higher whp than what you stated...
If you add the headers with your NEO (tuned) you may get to 280 rwhp, but bone stock GS400's hitting 245, I don't think so! I don't know and I forget off hand what Kevins GS4 ran on the dyno and his was stock/stock. He place a post up in Performance. I do know and read on here that GS400's with the 'famous' SRT intake were getting 239/240. So with that said don't be surprised when you dyno your car 'post' NEO and tuning, if you see you numbers in the low to mid 240's. I'm presently at 266 hp or something close to that and I don't have AFC or an intake, but I do have a drop-in which is what, good for 2-4 hp's?! So with the addition of an intake and a tuning I would have to get 35+ with no real engine upgrades is alittle unrealistic to me. Hey I'm not a mechanic, and I can be wrong. Truely I hope I am because I would love to get my N/A GS430 just close to 300 rwhp and by close I mean 288 - 293 not to mention hitting it and breaking it. But if you can, go for it and a whole lot of GS4xx will follow I'm sure.
#10
Explain how something like this happens then...
https://www.clublexus.com/forums/sho...d.php?t=263646
Your right it's better to low-ball than get your hopes up but just by looking into different results from members with the V8's here is how I came up with my assesment.
Stock GS4XX
240whp
Headers alone (documented on CL)
17whp
Intake & Exhaust
5whp
TM Plugs
3whp
Apexi SAFC II / Neo (w/proper tuning)
15-20whp (as per the above link)
Grand total (drum roll please...280-285whp) also, my intake has a kind of ram air effect in the lower air dam not just the basic K & N FIPK setup. I'm taking in more air than before (I know it because I was getting a CEL because of too much air; MAF couldn't read properly)...so that might help too... Not trying to argue here but I think I should see around 265 whp (subtracted out the header results of +/- 17whp.
https://www.clublexus.com/forums/sho...d.php?t=263646
Your right it's better to low-ball than get your hopes up but just by looking into different results from members with the V8's here is how I came up with my assesment.
Stock GS4XX
240whp
Headers alone (documented on CL)
17whp
Intake & Exhaust
5whp
TM Plugs
3whp
Apexi SAFC II / Neo (w/proper tuning)
15-20whp (as per the above link)
Grand total (drum roll please...280-285whp) also, my intake has a kind of ram air effect in the lower air dam not just the basic K & N FIPK setup. I'm taking in more air than before (I know it because I was getting a CEL because of too much air; MAF couldn't read properly)...so that might help too... Not trying to argue here but I think I should see around 265 whp (subtracted out the header results of +/- 17whp.
Last edited by Rock-a-Lex; 11-02-07 at 07:59 AM.
#11
Lexus Fanatic
https://www.clublexus.com/forums/sho...d.php?t=309735