Which 60-65mm throttle body (TB) for easy upgrade on CA18?

[Vetal]

I was reading for a while but didn't come to conclusion. Some say we need KA24E, some say KA24DE. Which one fits better?
I want smth. 60-65mm throttle diameter as I'll try to achieve some 600HP.
Maybe some other good options? I don't mind doing minor work to get it fitted (like making adapter if necessary).
I'd like 65mm more, but if it's harder to fit I'd settle for ported 60mm

[tommey]

What about machining the stock throttlebody?

This one is 60mm, old throttle plate is for reference only.

[Vetal]

Seems too complicated - need to source new plate, and ensure perfect seal between plate and body... wouldn't want to try that

[themadscientist]

I'm using an S14 SR20DE one. It bolts right on and i just had to hog out the inlet on the manifold. I cut the ugly water heater bit off too with a hacksaw.

[Vetal]

I'm using an S14 SR20DE one. It bolts right on and i just had to hog out the inlet on the manifold. I cut the ugly water heater bit off too with a hacksaw.

I didn't even know there were non-turbo SR20 in S14...
I don't want to loose water ports, I presume I could leave them? I'm driving my car at as low as -20C/-4F...
What exactly needs to be done to SR20DE TB, and where could I find one?

[themadscientist]

Bolt it on.

[Vetal]

Any ideas where to source it?

[ska69]

ebay?

btw, what about ka24e TB?

TMS, what are those cool looking bungs on the outerside of the plenum? for additional injectors?

[themadscientist]

Yup

[Vetal]

Can't find it on ebay
Between KA24E and KA24DE, which one fits better?

[TheMAN]

both the KA24E and KA24DE throttles are the same size, but the DE one fits better... because installing the KA throttle on the CA means flipping the KA throttle 180 degrees from its original position, the water hose fitting on the KA24E throttle will be on the top side, which kinda interferes with the hood if you hooked up a water hose to it... the DE throttle will fit a little better.... I tried both, the DE is better, trust me

the down side is, you'll need to swap the throttle sensors from your CA or KA24E throttle to the DE throttle as they are different... setting it up is easy though and the instructions are all in the FSM.... basically check for electrical continuity between two pins when the throttle is closed.... once the throttle is opened, it will no longer have the continuity.... like I said... easy!

[Vetal]

Thanx, that is what I wanted to know! I wouldn't want water pipes on top of the manifold
And with KA24E you wouldn't have to swap sensors, right?

I was told that KA24DE can be either with neutral switch or without (depending on manual/auto transmission), but I presume, if I have to swap TPS from CA, this doesn't matter?
Pulley must be swapped too?

[mbmbmb23]

Do yourself a favor and use a KA throttle body WITHOUT cruise control, otherwise you have to remove the cruise pulley and space the main pulley away from the unit so the nut can tighten the pulley up at the outer end of the shaft. (hope that makes sense, I can send a pic if need be).

[TheMAN]

or you can make a custom cable bracket so that it will work... you'll also be able to have working cruise control too

[Vetal]

I don't have cruise control anyway. Do I need to swap CA18 pulley onto both E and DE?

[mbmbmb23]

Ideal part for you here:

http://www.ebay.com/itm/THROTTLE-BODY-N ... 48404c057a


90-92 stanza TB w/o cruise

The cooling ports are underneath which looks better and they are on the same horizontal plane, one is short and stubby and points towards the driver side wheel and the other toward the front bumper. Swap the TPS and pulley then portmatch to your intake manifold with a dremel and you're good to go. (You can even do what I did and knife edge the circular flapper door and replace the 2 screws with headless set screws with female hex pattern).

You could probably find one of these at a local junkyard for $20-$50 being that Stanzas aren't in demand. Also check http://www.car-part.com and call the cheapest places first and see if they ship.



-m

[Vetal]

I'm not in USA, that makes it somewhat harder

If I swap pulley anyway, does it still matter whether I get cruise/non-cruise DE throttle body? I guess it still does...

[mbmbmb23]

Ah, non USA then I would stick to Ebay USA for a KA TB. You need to swap pulleys regardless of cruise control on the KA TB or not. You cant keep the KA cruise pulley because it wont fit with the CA throttle pulley (they stack), so if you get a KA TB with cruise you need to put something in the spot where the KA cruise pulley was to allow the nut to hold tension on the end, I used the extra spring retainer cup from the CA TB shaft. If you get a KA TB with cruise let me know your email address and I'll send pics of what I did.



-m

[Vetal]

Matt, got your pics, thanks! Nothing criminal to modify if I get TB with cruise, I guess.

[TheMAN]

I think the stanza throttles are smaller than the 240SX KA throttles... I think I remember noticing this difference at the junk yards years ago

the KA throttles I was referring to earlier are the 240SX ones

[Vetal]

Guys what do you think of this? Looked tempting BUT!!!
I'm not sure about idea to remove half of the shaft completely... What do you think?
http://www.ebay.com/itm/170790704967?it ... _500wt_950

[TheMAN]

will be hard to make it work... the U13 altima throttle has the cable pulley located at a different location... not at the throttle body like pretty much every throttle out there
you see that rod with the white plastic ends? it hooks on to the pulley

[Vetal]

I presumed that rod still turns some pulley so it can be swapped... thanks for the hint

I still want 65 or even 70mm more. What about aftermarket throttle bodies? There's plenty of them on Ebay for cheap

[TheMAN]

60mm is plenty for the CA... you're already losing port velocity for low rpm/off boost... anything larger is going to hurt performance with no improvement while on boost... your restriction then will be the intake manifold

[mbmbmb23]

I think the stanza throttles are smaller than the 240SX KA throttles... I think I remember noticing this difference at the junk yards years ago

the KA throttles I was referring to earlier are the 240SX ones

How big are the 240sx KA TB's? 90-92 Stanza KA TB's are 2 3/8 inches, 60.32 mm, I have one in front of me that I just measured. 87-89 are way different and not even an option: http://www.ebay.com/itm/OEM-87-88-89-NI ... 230b41f6af






m

[Vetal]

60mm is plenty for the CA... you're already losing port velocity for low rpm/off boost... anything larger is going to hurt performance with no improvement while on boost... your restriction then will be the intake manifold

Tests are hard to come by, but from what I found even Evos at stock power benefit from uprading TB from 60 to 65mm. And I'm not planing to run 300 HP
edit: restrictions are not like that - now it is one part, you change it, and then it's suddenly another part. No, every single part (even straight pipe) imposes some restriction which add up. Improving any part will improve total output (unless we go to extremes where some part (or few of them) are completely maxed out.
Anyway, I'd like to get smth. at least 65mm size since I dived into all this TB stuff

[mbmbmb23]

From some internet numbers I dug up the N15 pulsars (SR16VE N1) had 70mm (ID) TB (Nissan Part# 16119-1N510). The N15 units are hard to come by and expensive and I'm pretty sure the N15 euro Almera GTi (SR20DE) has the 60mm, so unless you're willing to step up to the Q45 which had 83mm (ID), you have a choice to make. 60mm for cheap, 70mm for not cheap, 83mm for cheap but they may cost a bit to fit (not sure if they bolt up without a custom flange welded on). I would go with the easy 60mm unit then upgrade later, it's not a hard part to get to when it comes time to swap out for an upgrade.

-m

[Vetal]

I think Almera SR20 had this one
http://www.200sx.lv/forum/download.php?id=11284
would it fit at all?

[TheMAN]

probably will fit from the looks of it.... the pulley is a progressive one instead of linear too

[mbmbmb23]

Ever thought of using the Hayabusa throttle bodies and making a custom setup? You have the Euro 4 port head yes?

http://www.ebay.com/itm/99-07-2006-06-S ... 73&vxp=mtr