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Old 04-06-2009, 12:14 PM   #1
Rei_Akira
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Default couple questions....EJ20K

ok, sooooo.....is the factory turbo on a v4 sti an IHI turbo?
also, for the spark plug wires (missing them from the motor when i got it but didnt think anything about it), there's a bolt hole in the valve cover for them to bolt to, or am i missing something? right now its just open down to the plugs...

stupid questions i know, but just trying to get everything in order so i can finish my swap this summer...
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Old 04-06-2009, 01:32 PM   #2
Cbgrandtheftauto
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should be a TD05.

they are a tear drop with a nipple that is at the tip of the tear drop...is that what your talking about???

http://www.magnecor.com/magnecor1/files/catalog.pdf

bottom of page 15 under other models

I had the same problem trying to find plug wires...this is ur best bet 45339

Last edited by Cbgrandtheftauto; 04-06-2009 at 01:37 PM.
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Old 04-06-2009, 02:58 PM   #3
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I think its VF22/23 (unless wagon or auto)and the plug wires from NA 2.5 L should work. You'd need two sets of plug wires though. Kinda vague...
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Old 04-06-2009, 05:35 PM   #4
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Quote:
Originally Posted by ckcadavona View Post
I think its VF22/23 (unless wagon or auto)and the plug wires from NA 2.5 L should work. You'd need two sets of plug wires though. Kinda vague...
they dont I have already tried..the longest one is a tad shorter than the 20k's shortest wire
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Old 04-06-2009, 05:39 PM   #5
Matt Monson
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Quote:
Originally Posted by Rei_Akira View Post
ok, sooooo.....is the factory turbo on a v4 sti an IHI turbo?
Yes. It's a VF23. The VF22 was found on the non-STi Ej20K 5MT sedans
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Old 04-06-2009, 05:42 PM   #6
linsavy
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It's a VF24 on the STi. V3 was a VF23.
The plug wires are 22451AA793, 22452AA682 x 2, 22451AA822, but SOA doesn't sell them, you can get them from Canada, UK or Japan. There is an NGK set that fits pretty good for about 1/3 the price of the OEMs. You should have a couple of wire clips on both sides to guide the wires.
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Old 04-06-2009, 06:00 PM   #7
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heh ok, just making sure on both accounts. when i did my SR20 swap in my 240 i was lucky and got an S15 turbo already on the motor, and wasnt sure if the factory turbo on the V4 was a IHI.
and i'll have to order the wires then, im just glad im not missing anything major.
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Old 04-06-2009, 07:50 PM   #8
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NGK wires part is FX54 for the center coilpack manifold EJ20K
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Old 04-06-2009, 08:32 PM   #9
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Quote:
Originally Posted by kingsubi View Post
NGK wires part is FX54 for the center coilpack manifold EJ20K
wicked, thanks mate, reallly appreciate it.

another question really fast, the shaft on the turbo doesnt *seem* to have play, but there *looks* small groove/scratch in the compressor housing around the intake turbine, im wondering if its worth my time to take the turbo off and have it inspected, better safe than sorry...

Last edited by Rei_Akira; 04-06-2009 at 09:05 PM.
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Old 04-06-2009, 09:04 PM   #10
Matt Monson
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Quote:
Originally Posted by linsavy View Post
It's a VF24 on the STi. V3 was a VF23.
I don't know why I always forget that. I've probably been corrected on that point more times than I have fingers.
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Old 04-07-2009, 12:31 AM   #11
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- i have a v3 sti from a gf8 (wagon), which has a vf23 on it.

- zach at jhot in texas says the v3 wagons have vf23 and sedans are vf22.
- my friend sean swears up and down that the v3 wagons are vf24 and sedans are vf23.
- as far as i knew, the v3 wagons and sedans had vf23s and the wrxs were td05s. or a wrx wagon was a td04 and a wrx sedan was td05
^^all that is speculation. ive heard too many things from different people and it all seems to conflict. or just when i think i get it figured out then i hear about someone else with something different that conflicts what i hear. so basically somewhere in the v3-4 range they used vf22,23,24 and perhaps td05. some things might have been factory options/upgrades, or who knows what else caused all this weird conflicting information
ignore all that. What Jaxx says below IS correct

also about the coil stuff. there are bolt holes in the valve cover for plugs but you dont use them because the coil wires just stick onto the plugs pretty well and kinda suction themselves in. theyre all rubber so you cant/wont/dont/wouldnt screw anything down. the coil pack and the coil wires are the same for a 1998 2.5RS only. also cam gears are the same for 98 rs

Last edited by elislider; 03-15-2010 at 10:00 PM.
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Old 04-07-2009, 01:13 AM   #12
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ok, thanks, and ya, cleaned up the plate on the turbo and its a VF24
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Old 04-07-2009, 09:53 AM   #13
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close zach is right

wagon td04
sedan vf-22
v3 vf-23
v4 vf-24

no tdo5s after 9/96
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Old 04-07-2009, 12:00 PM   #14
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Quote:
Originally Posted by elislider View Post
the coil pack and the coil wires are the same for a 1998 2.5RS only. also cam gears are the same for 98 rs
The 2.5RS wires are not long enough to get around the coolant tank well. You have to stretch them. NGK or OEM are a better fit.
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Old 04-07-2009, 01:05 PM   #15
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Quote:
Originally Posted by linsavy View Post
The 2.5RS wires are not long enough to get around the coolant tank well. You have to stretch them. NGK or OEM are a better fit.
they worked for me... though i dont think i mounted them in the stock wire guides since a couple were broken anyways.
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Old 04-07-2009, 01:12 PM   #16
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did anyone who did this swap have to rebuild their turbo after they put the swap in and got it running (within a year or so due to corrosion on the bearings?). i had to do this on my nissan's SR20...would rather rebuild it now when its not running and apart rather than later when its together...
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Old 04-07-2009, 02:47 PM   #17
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nope .. and its a good thing as vf-22s are not rebuild able by your average shop
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Old 04-07-2009, 03:33 PM   #18
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are they a ball bearing center section, which would have to be replaced rather than rebuilt...? are the VF24's the same?
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Old 04-07-2009, 04:34 PM   #19
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My VF23 crapped out after about 25k km after the swap. Had a total of 115k on it Of course I had other issues that may not have helped, nor did the 20psi of boost. None of the 22-24 are ball bearing, so not rebuildable.
They last a good long time as long as the oiling is good and you don't overstress them.
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Old 04-07-2009, 04:56 PM   #20
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ok, right now the motor has about 36k km on it, so i should be good for a bit. do you know that the oem boost is for the VF24? ive heard its 18psi, but it sounds a bit suspicious to me...
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Old 04-07-2009, 07:47 PM   #21
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I think it is more like 15psi, but I don't know for sure.
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Old 04-07-2009, 10:35 PM   #22
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that sounds more reasonable, i think i found a site a while ago that gave specs for the motors, and i *think* i saw 14psi, but still not 100%.

also, for the people with the 20K running higher than factory boost, did you have your computer flashed (or Apexi FC) or are you just running a boost controller?
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Old 04-07-2009, 11:48 PM   #23
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Quote:
Originally Posted by Rei_Akira View Post
that sounds more reasonable, i think i found a site a while ago that gave specs for the motors, and i *think* i saw 14psi, but still not 100%.

also, for the people with the 20K running higher than factory boost, did you have your computer flashed (or Apexi FC) or are you just running a boost controller?

I have the PFC and stock boost is 1bar or 14.x psi either one...I never went to higher boost on mine until I swaped to the VF39 and tuned the PFC...now I have a map made for every occassion
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Old 04-07-2009, 11:58 PM   #24
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I am running 17 with an autronic. it needs better tune, after changing headgaskets, I haven't messed with it because of winter. headgasket has been the only issue after two years of running now.
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Old 04-08-2009, 12:16 AM   #25
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Quote:
Originally Posted by Rei_Akira View Post
that sounds more reasonable, i think i found a site a while ago that gave specs for the motors, and i *think* i saw 14psi, but still not 100%.

also, for the people with the 20K running higher than factory boost, did you have your computer flashed (or Apexi FC) or are you just running a boost controller?
I think stock boost depends how it came from the factory. My almost stock v4 STi RA would hit 21psi and taper off to about 19psi. The only power mods at the time was a cbe and a short-ram. But after a while it would pull timing and the most I'd see is 19psi. I'd reset the ecu and it would go back up to 21psi.

But now that I'm using a Hydra and it's tuned, it's waaaayyyy faster. Now the most I see is 19psi and it tapers very quickly to 17psi.

Maybe dig around on Scoobynet and see what's normal for them. You'll want to make sure it's Jap imports you're looking at though.
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