throttle body
09-15-2005, 10:33 AM
#4
Head Muckraker
Join Date: Oct 2001
Location: Bay Area
Posts: 9,221
Originally Posted by efrain
So you recomendation is to upgrade to a 24osx throttle body. It's a better upgrade than the 60 mm? Will I need to make any modifications to install it?
And yes, you'll need a throttle body spacer and may need to modify the water lines and throttle linkage a bit depending on which one you get.
In order to get better performance, you will also need to bore out the input of your intake manifold to accept the volume of air.
Of course, you won't see very much improvement in power unless you also install the complimentary upgrades like headers, exhaust, cam and port matching your intake and exhaust ports on the head itself.
Then you'll get some nice power and torque. A lot of people don't realize that all the mods are necessary to achieve the full potential of even one upgrade.
If you're going to do it, it should be a small part of a bigger plan. A roadmap if you will, to your performance goal. Throttle body this month, Header next month, cold air intake the month after, new 2.5" mandrel bent exhaust the following month, cam/rockers/valve springs & port matching to finish it all off. By now, you'll probably need to upgrade to at least 280ZX Turbo injectors. While you're at it, get a nice Pallnet fuel rail and convert to O-Ring injectors instead of stock Nissan ones, might as well replace your 'head' hardware set too:
http://www.hammondsplains.com/z/zwor...lnet/index.htm
If you just want bragging rights, then all this isn't necessary, you can just bolt it right on and go about your merry way.
09-15-2005, 10:35 AM
#5
Originally Posted by efrain
So you recomendation is to upgrade to a 24osx throttle body. It's a better upgrade than the 60 mm? Will I need to make any modifications to install it?
09-25-2005, 08:51 PM
#10
Registered User
Join Date: Apr 2005
Location: Temecula, CA
Posts: 5,485
With a spacer you should be able to squeeze the boot over the KA TB. I did it without too much trouble to see if the boot would fit. I didn't have spacer though so I had to make my own piping anyways but the boot should fit. If you're having trouble you can use a little hairspray on the inside of the boot. That'll make it easier to slide on and it helps it to not slip off in the future. A little trick I learned from my BMX days that works on cars 
09-25-2005, 11:22 PM
#11
Registered User
Join Date: Aug 2005
Location: St. Petersburg & Orlando Florida
Posts: 126
has anyone completely deleted the water/coolant lines from the TB? It never made sense to me to have hot coolant flowing where cold air should be. (even after the lecture from an engine builder, and automotive teacher, i still think its better without it! Only seems like it would cool with the stock airbox, if you have a custom cone filter sucking up cold air from outside the engine bay, you don't need it right?!).
09-25-2005, 11:54 PM
#12
Originally Posted by RubberBerner
has anyone completely deleted the water/coolant lines from the TB? It never made sense to me to have hot coolant flowing where cold air should be. (even after the lecture from an engine builder, and automotive teacher, i still think its better without it! Only seems like it would cool with the stock airbox, if you have a custom cone filter sucking up cold air from outside the engine bay, you don't need it right?!).
09-26-2005, 07:42 AM
#13
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
I re-routed the coolant on mine too. That heater is to keep the throttle body from freezing in cold weather. The air sucking through the throttle body can cool the throttle itself much colder than the air outside. If the throttle plate freezes, it can stick open. I haven't had any trouble this summer but I'll see how it goes through this coming winter, if I can even drive a car after gas hits $5 a gallon.
09-28-2005, 09:35 PM
#14
Registered User
Thread Starter
Join Date: Jun 2005
Posts: 61
I went to a junk yard that specialize in nissan 
amd I asked for a 60 mm TB from 240sx 
. But then the guy working there came with too many info for me 
. He told me that he has a couple of TB"s , but all of them were different #'s but nissan 60mm . He first showed me the TB of a 1995 infinitti 60 mm; then came one with a # like this SR20DET. At this moment I was a little bit worried of my lack of knowledge. 
And the he brings one with # KA24E and a Ka24DE. Please can you tell me which one of them I can use in my 81 N/A?
amd I asked for a 60 mm TB from 240sx . But then the guy working there came with too many info for me . He told me that he has a couple of TB"s , but all of them were different #'s but nissan 60mm . He first showed me the TB of a 1995 infinitti 60 mm; then came one with a # like this SR20DET. At this moment I was a little bit worried of my lack of knowledge. And the he brings one with # KA24E and a Ka24DE. Please can you tell me which one of them I can use in my 81 N/A?
09-29-2005, 08:24 AM
#18
linkage diff... the 60mm throttle body will most likely be cable operated... the Z has a ball / rod linkage. Some 60mm throttle bodies have the same diameter butterfly shaft, and you can just swap over the z one. Might have to use ya imagination a lil.
09-29-2005, 01:11 PM
#21
Originally Posted by efrain
Is there any difference between the sr20det and the sr20de TB's?
09-29-2005, 09:53 PM
#22
Registered User
Join Date: Apr 2005
Location: Temecula, CA
Posts: 5,485
Originally Posted by s/cL3.0
All you really need is the spacer and swap the linkage andit will bolt right in for the most part.. I got lazy and just swaped out half of the 240 linkage and grinded the intake manifold a little for clearance..
