Quad throttlebodies

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

Why not just swap the whole head of a SSS Sentra/bluebird. (I think they both use the same version of the sr20de.
Then you get the right sized throttle bodies for the 2.0l, as well the cams and head porting to make the most use of them.

Of course if you have a 1.8l primera I wouldn't bother doing anything to the engine. Just stick with haveing the best looking Primera Iv seen (sorry p-man) and work towards a det swap. :D

It is a 2L , and we where planing on getting some cams ground up to match the new inlet, with maybe a air/feul control to finish it off.

I know i shouldn't of gone out to the drags becouse now i need
MORE POWER

Originally posted by Grunter
It is a 2L , and we where planing on getting some cams ground up to match the new inlet, with maybe a air/feul control to finish it off.

I know i shouldn't of gone out to the drags becouse now i need
MORE POWER Thought about fitting the SR20VE head? So far no-one has tried it but your freinds at Turbo Technology may be able to do it.

Originally posted by Grunter
I know i shouldn't of gone out to the drags becouse now i need
MORE POWER

hahaha! a comon problem!

Cams are a must if you want to actualy make any more useable power with the quads.
It might pay to check if they will flow enough air at the right velocity to feed the SR20. 200cc donst sound like much of a differnce, but it could be enough to mean you may lose power.
Find a good local shop with a flowbench and give them all the specs for your motor, I cant imagine it would cost much.
If your Auckland based then Leading Edge cylinder heads are the best, their based in East Tamiki, numbers in the book. They will also be able to flow the head and make any changes to the ports that may be required, as well as recomend a good cam profile. (aparently anything to wild upsets the valve train on the SR20s so be carefull here).

It may of course be possible that the quads will bolt up with no troubles, but I would find someone who has done it first and found out if it will work before trying it with out doing any hard resurch first.

And have you checked on the price? the GT-i motor is worthless with out the throttle bodies, so wreackers may not be prepared to seperate them.
e.g. going rate for quad throttle bodies from a 20valve 4age is $1,000, or the same as the cost of the motor.

The only prob about the VVT is the computer would be completly differnt,
I not a fan on v-tec and mivecs (my g/freind has a mirage cyborg, and i have a couple of freinds with v-tec) and i hate the dead spot down low

I know of a complete VVT engine for sale in NZ at the moment if you where keen ????????? It even has the tiptronic m6 trans on the end of it.

Cheers Grant

Originally posted by Grunter
The only prob about the VVT is the computer would be completly differnt,
I not a fan on v-tec and mivecs (my g/freind has a mirage cyborg, and i have a couple of freinds with v-tec) and i hate the dead spot down low


what dead spot down low? the early VTEC's, and less developed Mivacs have a flat spot in the middle where the cam changes over.

I take it the SR20Ve is the bigger brother to the SR16ve? with the variable cam profiles, and cam timing?
Where in NZ is the motor? and what model Primera did they come in? Iv only ever heard about this engine, but never seen one.

I can get the quad thottle body set up for $400
or a complete GTiR engine (minus intercooler) with stuffed bottom end for $1000, and off that i could sell the turbo for about $350 and keep the mainifold just i case (if you get my drift) and it still leaves me with a head to sell, plus lots of little bits and peices.

There are quite a few in NZ in station wagon fourm, some are tiptronic others are just cvt trans,
the place that i know have one is out of a s/wagon
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

The charts I have seen show the torque/power of the VE engine is superior right across the rev range. The stock VE (compared with the 110kW SR20DE) makes something like 20% more power at low revs, 10% more midrange and 20% more at high revs. This is all due to the higher and flatter torque curve throughout the range.

Just out of curiosity, whats that engine selling for? Not really interested in the CVT.

DOH! you posted while I was typing.:o

Originally posted by Grunter
There are quite a few in NZ in station wagon fourm, some are tiptronic others are just cvt trans,



ahhhhhhhh! yes Iv seen them. everyone raves on about Audi making a CVT that could handle a lot of torque, but dosnt know that Nissan did it first. (another japanese first that no one recognises).

Te awamututu is a little far from here but im heading to toupo in a few weeks, I might drop in on the way down and have a look at it. What sort of hp?


Thier still slower than my civic though!!! (and you thought I wasn't going to say anything!!!!!!!! :D :D )

They make 19hp around 7000 revs. That doesn't tell the whole story though - what really makes the engine is there is more power available earlier in the revs and the torque curve is flat from about 4.5k thru to redline. I'll see if I can dig up a chart ...

Here's the torque curve.

This should provide everyone with a great visual description.

Originally posted by Moppie
Thier still slower than my civic though!!! (and you thought I wasn't going to say anything!!!!!!!! :D :D ) :flipa: :D :D

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.

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.

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.

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

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. :D Oh, this was in the Sentra SE-R with the SR20DE. :D:D

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.

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 :eek: kinda worried..george, what's your take on that?

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 :eek: 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. :D

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

Grunter...what do you mean??

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.

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 :) ).

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?

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 !!!!!!!!!!!

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.

Originally posted by P10DET


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.

It would not be much in the way of quality, its about the cost of getting a 3L box welded up out of scrap stainless from any enginering shop that works with it. It would be a very simple air box, and might not work as well as it could.

Im sure if you design one you could one built in the states to a similar standard at a similar cost. :D

But if you really want one and are prepared to pay the rather expensive postage costs, then I do accept paypal! :D :D :D