Quad throttlebodies

[T4 Primera]

Originally posted by Grunter
As some of you may have read in a differnt thread,
I am toying with the idea of swaping my inlet manifold to one off a GTiR Pulsar/Sunny, Has any one else done this or looked into it ???
Cheers Grant

Have you had a look on the se-r mailing list? Might be something there.

[Primal SMX]

The SR20Ve engine came in the Japanese model Hyper CVT Primera, thats all that i know of that moter as i was going to by one but i dont like the CVT, a glorified automatic in my opinion, but a couple of years back i seen one in readers rides in NZ Performance car magazine which was in Tauranga and have since seen the odd one in the Auto Trader.

I too breifly looked into a quad throttle upgrade but i was told it was too expensive as nobody had done it yet. I was going to do it with a link computer or something like that but thats about where it ended. I have seen SR20DE in japan race cars with quad throttle set up on them and new cams etc. Tommy Kaira perhaps? Hope this helps.

[G22DET]

i was thinking about swaping the GTiR individual TB to my DET motor from the blue bird, however, the head is different and it will not bolt on. most likely, it wont fit on the DE engine as well.

[Grunter]

it will not bolt on. most likely, it wont fit on the DE engine as well

Funny you should say that, we have just found that out....
G22DET, do you want to but a head and inlet set up $500 us
plus about $80us freight
Cheers Grant

[P10DET]

Originally posted by G22DET
i was thinking about swaping the GTiR individual TB to my DET motor from the blue bird, however, the head is different and it will not bolt on. most likely, it wont fit on the DE engine as well.

Luke is 100% correct.

I looked into this 2.5-3 years ago when I was building my killer NA engine. The ports are shaped very differently between the GTi-R engine and the other versions of the SR20. In fact, the manifold will not even bolt up.

As for quads, they only add some throttle response, but not power. The additional power comes from the short running intake manifold. If you want a short runner manifold, there are some custom-made ones available in The States, but I imagine you could have one made in NZ for less.

As for cams, the GTi-R head uses solid lifters. So, it doesn't respond quite the same as the other SR20 engines.

Sorry it took me so long to respond. I was racing this weekend. Dropped out of the 6 hour race just beyond the 2 hour maek and finally fixed it just as the race ended. We did really well with one of our other drivers in the sprint race the next day and ended up with a podium finish. Oh, this was in the Sentra SE-R with the SR20DE.

[T4 Primera]

Originally posted by Grunter
G & M Auto Spares, Bond Rd, Te Awamutu, ph 0-7-871 8575
Im not sure what sort of money they would want for it though

Just called them to enquire. The engine is out of a 1999 wagon that had only done 10 000 km and comes with computer, harness and MAF - basically everything needed for the swap. Asking price is NZ$1850 inc.GST ... hmmmm.

[G22DET]

i am 100% right cuz u told me last time..heh...
anyway, i'll be hitting the tracks too this weekend!!!! i hope my DET can handle it..still kinda afraid that i'll blow the thing since i dont have it tuned right and it's still running a stock ECU kinda worried..george, what's your take on that?

[P10DET]

Originally posted by G22DET
i am 100% right cuz u told me last time..heh...
anyway, i'll be hitting the tracks too this weekend!!!! i hope my DET can handle it..still kinda afraid that i'll blow the thing since i dont have it tuned right and it's still running a stock ECU kinda worried..george, what's your take on that?

When in doubt, run it rich. Check your plugs after every session since you have the little black boxes. If you don't have one already, I highly suggest a UR water pump pulley. The SR20 water pump is known to cavitate at high rpm. The UR pulley underdrives it enough to keep this from happening. If you don't run the UR pulley, you will run much greater risk of overheating it. Be sure to run water wetter.

If it were me, I'd short shift during my first session. Probably a good idea anyway so you can comfortably learn the track.

I think if you start slow and check things as you go, you'll be able to go full tilt boogie before long. I really think you should take it somewhat easy for your first session. You don't have to beat anyone so keep your ride under you and on the black stuff between the brown stuff.

[G22DET]

what do you mean by the little black boxes?
i dont have the pulleys and it's kinda late now to get them installed...i'll watch my engine temp to make sure i wont overheat..should be quite cold anyway...
i've been at Streets quite a few times so i know the track pretty well...definitely gonna take it ez the first few sessions though...man, that's means my friend with a geEK b16 will probably outrun me...heheh

[G22DET]

Grunter...what do you mean??

[Moppie]

Originally posted by P10DET


Luke is 100% correct.

I looked into this 2.5-3 years ago when I was building my killer NA engine. The ports are shaped very differently between the GTi-R engine and the other versions of the SR20. In fact, the manifold will not even bolt up.

What about building a custom mount plate? Just a flat piece of steel with 4 holes in it, and new hole drilled to match the differnt mounting studs and weld the quad TB on?
Then port the De head to match the Quad TB?

Or are the ports far to different for this? or the Quad TB not of an easily weldable metal?


Getting a custom manifold made here is pretty easy, and if you know exactly what you want will not be terriably expensive, provided you stick with the stock single TB. The biggest cost in a new inlet is converting to quad TB, or incorperating a differnt TB into it.

[P10DET]

Originally posted by Moppie
What about building a custom mount plate? Just a flat piece of steel with 4 holes in it, and new hole drilled to match the differnt mounting studs and weld the quad TB on?
Then port the De head to match the Quad TB?

Or are the ports far to different for this? or the Quad TB not of an easily weldable metal?

No, the port shape is quite different. I would require some heavy rework of the ports on the head.

Originally posted by Moppie
Getting a custom manifold made here is pretty easy, and if you know exactly what you want will not be terriably expensive, provided you stick with the stock single TB. The biggest cost in a new inlet is converting to quad TB, or incorperating a differnt TB into it.

I can get the specifics of a good starting point. Basically, hack off a stock manifold at about 8" and attach a 3 liter plenum. That should get you in the ballpark (Yankee expression ).

[Moppie]

And a good stainless plenum should only cost about $2-300 if you get it made by someone who knows what thier doing.

A really simple one might only cost $100.
Run a big CAI into it and your all set!

What do you think Grunter?

[Grunter]

I have come to the conclution its not worth the hassle,
I have just made an offer on a damaged GTiR in japan, if i get that i might do a repower !!!!!!!!!!!

[P10DET]

Originally posted by Moppie
And a good stainless plenum should only cost about $2-300 if you get it made by someone who knows what thier doing.

A really simple one might only cost $100.
Run a big CAI into it and your all set!

What do you think Grunter?

Well I was thinking aluminum, TIG welded. If you can get one for $100, I'll send you a manifold. It would be really cool if they could weld on a boss for the AAC valve.