Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > Engine Tech

Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


Reply
 
Thread Tools Display Modes
Old 11-10-2015, 08:42 PM   #1
Rocketbunny240sx
Leaky Injector
 
Join Date: Jan 2015
Location: British columbia
Posts: 77
Trader Rating: (0)
Rocketbunny240sx is an unknown quantity at this point
Feedback Score: 0 reviews
Sr20det throttle body for s13

Hey guys just wondering what you guys recommended for an sr20det throttle body upgrade. I want alittle more throttle response and would it increase alot of hp? Just wondering. Im pushing 400whp atm. Thanks!
Rocketbunny240sx is offline   Reply With Quote
Sponsored Links
Old 11-10-2015, 08:54 PM   #2
Rusker
Zilvia Junkie
 
Rusker's Avatar
 
Join Date: Feb 2004
Location: Washington
Posts: 351
Trader Rating: (0)
Rusker is on a distinguished road
Feedback Score: 0 reviews
Redtop? Blacktop?

For reference here are the specs on the different TB for SR's.

S13 SR20DET throttle bore = 60mm
S14 SR20DET throttle bore = 50mm
S15 SR20DET throttle bore = 50mm
__________________
1990 S13/SR20
Rusker is offline   Reply With Quote
Old 11-10-2015, 08:54 PM   #3
Rocketbunny240sx
Leaky Injector
 
Join Date: Jan 2015
Location: British columbia
Posts: 77
Trader Rating: (0)
Rocketbunny240sx is an unknown quantity at this point
Feedback Score: 0 reviews
Its a redtop.
Rocketbunny240sx is offline   Reply With Quote
Old 11-10-2015, 08:57 PM   #4
Rusker
Zilvia Junkie
 
Rusker's Avatar
 
Join Date: Feb 2004
Location: Washington
Posts: 351
Trader Rating: (0)
Rusker is on a distinguished road
Feedback Score: 0 reviews
Tomei sells a 70mm throttle body. If this isn't big enough you can use a Q45 with the right adapter. I believe they are between 80-90mm.
__________________
1990 S13/SR20
Rusker is offline   Reply With Quote
Old 11-10-2015, 08:58 PM   #5
Rocketbunny240sx
Leaky Injector
 
Join Date: Jan 2015
Location: British columbia
Posts: 77
Trader Rating: (0)
Rocketbunny240sx is an unknown quantity at this point
Feedback Score: 0 reviews
Would 10mm more really make a difference?
Rocketbunny240sx is offline   Reply With Quote
Old 11-10-2015, 09:14 PM   #6
Rusker
Zilvia Junkie
 
Rusker's Avatar
 
Join Date: Feb 2004
Location: Washington
Posts: 351
Trader Rating: (0)
Rusker is on a distinguished road
Feedback Score: 0 reviews
Are you putting down 400whp, or just assuming you're making this much? If so, I would imagine you'd seem some improvement but nothing mind blowing. IIRC the stock SR20 60mm TB is good for about 350-400hp.

Without listing what you've done with the motor, I don't think anyone can really give you a good idea wether or not it's worth upgrading the TB.
__________________
1990 S13/SR20
Rusker is offline   Reply With Quote
Old 11-10-2015, 09:22 PM   #7
Rocketbunny240sx
Leaky Injector
 
Join Date: Jan 2015
Location: British columbia
Posts: 77
Trader Rating: (0)
Rocketbunny240sx is an unknown quantity at this point
Feedback Score: 0 reviews
I guess. Im literally pushing 400 whp i can show you my setup
Rocketbunny240sx is offline   Reply With Quote
Old 11-10-2015, 10:16 PM   #8
Kingtal0n
Post Whore!
 
Kingtal0n's Avatar
 
Join Date: Jul 2005
Location: South Florida
Age: 36
Posts: 4,248
Trader Rating: (17)
Kingtal0n is just really niceKingtal0n is just really niceKingtal0n is just really niceKingtal0n is just really niceKingtal0n is just really niceKingtal0n is just really niceKingtal0n is just really niceKingtal0n is just really niceKingtal0n is just really nice
Feedback Score: 17 reviews
Send a message via AIM to Kingtal0n
Waste of money

We can make 500-700 horsepower maybe even more on the OEM throttle body.
Using a larger part there just makes the car more difficult to drive and reduces the resolution at the pedal, reduces fuel economy, etc... its all negative, there is very little positive benefit at 500 horsepower and less for sure.
Kingtal0n is offline   Reply With Quote
Old 11-10-2015, 10:19 PM   #9
Rocketbunny240sx
Leaky Injector
 
Join Date: Jan 2015
Location: British columbia
Posts: 77
Trader Rating: (0)
Rocketbunny240sx is an unknown quantity at this point
Feedback Score: 0 reviews
Thanks for that!
Rocketbunny240sx is offline   Reply With Quote
Old 12-23-2015, 06:13 PM   #10
240knockout
Zilvia Addict
 
240knockout's Avatar
 
Join Date: Oct 2008
Location: Fort Lauderdale, Fl
Age: 31
Posts: 602
Trader Rating: (9)
240knockout is an unknown quantity at this point
Feedback Score: 9 reviews
would performance/drivability improve on a redtop by reducing the size from 60mm to 50mm? Has anyone tried that?
240knockout is offline   Reply With Quote
Old 01-21-2016, 12:05 PM   #11
vipergtsr1000hp
Zilvia Junkie
 
Join Date: Apr 2010
Location: dirty south
Posts: 307
Trader Rating: (2)
vipergtsr1000hp is an unknown quantity at this point
Feedback Score: 2 reviews
Quote:
Originally Posted by Kingtal0n View Post
Waste of money

We can make 500-700 horsepower maybe even more on the OEM throttle body.
Using a larger part there just makes the car more difficult to drive and reduces the resolution at the pedal, reduces fuel economy, etc... its all negative, there is very little positive benefit at 500 horsepower and less for sure.
How sure are you of this? I am currently building a S14 SR20 with a GTX3582R. Planning to make 600 whp+ I was debating whether to get a Greddy IM for the stock throttle (50mm) will most likely use KA TB (60mm) instead of the 70mm N1 TB which are rare and expensive. Would the 10mm make the difference i.e. more hp at upper RPMs, broader peak power at upper RPMs, etc??? This is what is causing me not to get a Greddy IM because of the TB sizes. I am currently looking at Velocity Elements IM which they will custom in Q45 TB flange. I just don't want the TB to be a limiting factor in making power.
vipergtsr1000hp is offline   Reply With Quote
Old 10-09-2018, 09:50 PM   #12
tunermt
Zilvia Member
 
tunermt's Avatar
 
Join Date: Aug 2008
Location: MT, AZ, Seoul, Bangkok
Posts: 294
Trader Rating: (0)
tunermt is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by vipergtsr1000hp View Post
How sure are you of this? I am currently building a S14 SR20 with a GTX3582R. Planning to make 600 whp+ I was debating whether to get a Greddy IM for the stock throttle (50mm) will most likely use KA TB (60mm) instead of the 70mm N1 TB which are rare and expensive. Would the 10mm make the difference i.e. more hp at upper RPMs, broader peak power at upper RPMs, etc??? This is what is causing me not to get a Greddy IM because of the TB sizes. I am currently looking at Velocity Elements IM which they will custom in Q45 TB flange. I just don't want the TB to be a limiting factor in making power.
Love those VE manifolds


__________________
Anti Lag Systems IG @Brewedmotors
tunermt is offline   Reply With Quote
Old 11-06-2018, 08:18 PM   #13
RomulanS13
 
Join Date: Oct 2017
Location: near salty oceans
Posts: 30
Trader Rating: (0)
RomulanS13 is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by vipergtsr1000hp View Post
How sure are you of this? I am currently building a S14 SR20 with a GTX3582R. Planning to make 600 whp+ I was debating whether to get a Greddy IM for the stock throttle (50mm) will most likely use KA TB (60mm) instead of the 70mm N1 TB which are rare and expensive. Would the 10mm make the difference i.e. more hp at upper RPMs, broader peak power at upper RPMs, etc??? This is what is causing me not to get a Greddy IM because of the TB sizes. I am currently looking at Velocity Elements IM which they will custom in Q45 TB flange. I just don't want the TB to be a limiting factor in making power.

With the aspect of forced induction you can only do so much. pretty simple all you can do is smooth things out porting/polishing cause you are forcing air in. CFM in duration will play a big part but to an extent there is always a capacity or limit to where it become less efficient IE to small of an IC or displacement.
RomulanS13 is offline   Reply With Quote
Reply

Bookmarks

Tags
240sx, s13, sr20det, throttle body


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 12:36 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™