Externally gated gt2871r tial 44mm tune - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

slide2unlock · 03-10-2013, 10:58 PM

So, I have an sr tuned on a gt2871r on 16psi making 300 Ish hp, I wanna go externally gated and now have a modded manifold and tial 44mm external waste gate. I haven't installed it yet, but I was wondering if I installed my external wastegate if it would screw with the tune, I just don't want it to lean out and explode, my tuner won't be back in the country for another 2 weeks and I have a drift event I wanna hit. Should I be alright? Cause my stock manifold is cracked and not holding boost, which is why I'm switching to the new manifold. Help would be greatly appreciated.

ryandh · 03-10-2013, 11:03 PM

you would need a new tune. What size spring in that 44mm?

oni jake · 03-11-2013, 01:23 AM

Quote:

Originally Posted by slide2unlock

So, I have an sr tuned on a gt2871r on 16psi making 300 Ish hp, I wanna go externally gated and now have a modded manifold and tial 44mm external waste gate. I haven't installed it yet, but I was wondering if I installed my external wastegate if it would screw with the tune, I just don't want it to lean out and explode, my tuner won't be back in the country for another 2 weeks and I have a drift event I wanna hit. Should I be alright? Cause my stock manifold is cracked and not holding boost, which is why I'm switching to the new manifold. Help would be greatly appreciated.

You'll most likely be fine. Do you have a wideband?

An ECB with adjustable gain is going to help you the most.

slide2unlock · 03-14-2013, 03:15 PM

So I traded the 44mm setup for a 38mm setup, it has a 10 pound spring in it. This manifold is all ceramic coated and whatnot, and I got cash ontop. I have a wideband, and an e-boost street e40, I just don't know if I should swap the manifold off for this modded one.

derass · 03-14-2013, 10:59 PM

you will be fine. the external will flow more exhaust, limiting the boost pressure quicker than with an internal. if the car was spiking before and the tune could handle it, it wont be a problem now.

Def · 03-15-2013, 08:56 AM

Not a problem. If anything you'll flow some more air, maf will take care of it, and timing will go down at the same boost pressure.

rwtf · 03-15-2013, 09:33 AM

Shouldnt you be making more than 300ish?

slide2unlock · 03-25-2013, 09:24 AM

I'm making 317, but my boost pressure always drops from 16 to 14 lol, which is why I'm going externally gated. I made a block off plate for the internal wastegate, so we will see what happens tomorrow

Croustibat · 03-26-2013, 03:06 AM

you got another problem if your 2871 cant maintain 16psi ... it should be able to push 22psi at least at redline.

slide2unlock · 03-26-2013, 09:50 AM

I think it's my wastegate a fault, I fixed it, it can hold 16 psi happily.

03-10-2013, 10:58 PM	#1
slide2unlock Leaky Injector Join Date: Sep 2012 Location: orlando Age: 31 Posts: 99 Trader Rating: (-1) Feedback Score: -1 reviews	Externally gated gt2871r tial 44mm tune So, I have an sr tuned on a gt2871r on 16psi making 300 Ish hp, I wanna go externally gated and now have a modded manifold and tial 44mm external waste gate. I haven't installed it yet, but I was wondering if I installed my external wastegate if it would screw with the tune, I just don't want it to lean out and explode, my tuner won't be back in the country for another 2 weeks and I have a drift event I wanna hit. Should I be alright? Cause my stock manifold is cracked and not holding boost, which is why I'm switching to the new manifold. Help would be greatly appreciated.

03-10-2013, 11:03 PM	#2
ryandh Zilvia Junkie Join Date: Nov 2011 Location: So cal Posts: 431 Trader Rating: (5) Feedback Score: 5 reviews	you would need a new tune. What size spring in that 44mm? __________________

03-15-2013, 08:56 AM	#6
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	Not a problem. If anything you'll flow some more air, maf will take care of it, and timing will go down at the same boost pressure. __________________ S13 Hatch - Goes around tracks quickly DEFSPORT

03-15-2013, 09:33 AM	#7
rwtf Zilvia Addict Join Date: Jun 2011 Location: Maryville, TN Age: 33 Posts: 830 Trader Rating: (3) Feedback Score: 3 reviews	Shouldnt you be making more than 300ish? __________________

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03-14-2013, 03:15 PM	#4
slide2unlock Leaky Injector Join Date: Sep 2012 Location: orlando Age: 31 Posts: 99 Trader Rating: (-1) Feedback Score: -1 reviews	So I traded the 44mm setup for a 38mm setup, it has a 10 pound spring in it. This manifold is all ceramic coated and whatnot, and I got cash ontop. I have a wideband, and an e-boost street e40, I just don't know if I should swap the manifold off for this modded one.

03-14-2013, 10:59 PM	#5
derass Zilvia FREAK! Join Date: Jun 2010 Location: Toronto, ON Age: 37 Posts: 1,182 Trader Rating: (0) Feedback Score: 0 reviews	you will be fine. the external will flow more exhaust, limiting the boost pressure quicker than with an internal. if the car was spiking before and the tune could handle it, it wont be a problem now.

03-25-2013, 09:24 AM	#8
slide2unlock Leaky Injector Join Date: Sep 2012 Location: orlando Age: 31 Posts: 99 Trader Rating: (-1) Feedback Score: -1 reviews	I'm making 317, but my boost pressure always drops from 16 to 14 lol, which is why I'm going externally gated. I made a block off plate for the internal wastegate, so we will see what happens tomorrow

03-26-2013, 03:06 AM	#9
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 44 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	you got another problem if your 2871 cant maintain 16psi ... it should be able to push 22psi at least at redline.

03-26-2013, 09:50 AM	#10
slide2unlock Leaky Injector Join Date: Sep 2012 Location: orlando Age: 31 Posts: 99 Trader Rating: (-1) Feedback Score: -1 reviews	I think it's my wastegate a fault, I fixed it, it can hold 16 psi happily.