1G-GE Blacktop ITBS?

[tedmunds]

Right, I know its been asked before but thought there might aswell be a thead with a proven method in. All the other ones I found fizzled out and died before anyone built a runner. 

 

Got a 1G-GE in my Z10. I don't want a turbo, I have a JZX71 for that. Don't wanna change the engine, looking to put ITBs on it. From what I've gathered the best bet is Blacktop ITBs off a 4AGE or GTR ones off an RB26. 

 

How do I make this all work, what parts do I need, what do I need to make? 

 

Chuuuurs

[d.p.n.s]

As an option just in case you having thought of it.

Motorbike throttle bodies would work as well just need 2sets.

.just make a manifold with pipes welded in the right place and angel for each ports.and silicon the TBS on.

The TBS already have the injectors in them and the standard injectors will be pleanty for a 2.0 ( mate has a set on his 2.0 escort ).

Some sets break into 2 sets of 2 but other break in to 4 individual TBS

Just have to make the spacers ( I think my mate just got threaded rod from bunnings and cut to size)

And seeing as the TBS are individual units you just have to match 6 out of the 8 that will work together and 1 with the tb sensor.

Might just have to extend the tabs that touch each other to open and close at the same time.

[Mitch.W]

gtr itb's cheaper than 4age, same size as blacktop but they are round and not the weird triangle shape that would be hard to make a manifold for,  and a much better looking unit than the 4age ones. I have a set on their way to me for my sr20de, all you really need is to make a manifold up, injectors of your choice, and a link. one of the struggles of itb's is getting enough vaccume to make your brake booster work properly so you may just have to run unboosted brakes, you might have to do this anyway if the itb/velocity stack is going to hit the brake master

[beachlander]

For vacuum you just run a vacuum block. Easy peasy

[Spencer]

You realise you will have to go to an aftermarket ECU right?

 

I think I'd just use some silvertop throttles, these things have same size ports as a big port 4age so you won't be choking it with silver top throttles. Next step is get a flange cut for the head, steel is easy for DIY at home if you have a welder and some skills. Or go aluminium for weight and bling, but then if you are asking how to do this I doubt you have a tig to weld alloy. You also need to sort flanges for the throttle bodies (whatever ones you decide on), then because you will have a roundish throttle body and a shitty oval port on the head you need to make some tubes to connect these two flanges. If you go steel its pretty easy to squish some tube to do this or cut and shut some tube (I think steelies did something cool like this on his 4age starlet if you want to go hunting, use google search) . Then you have two flanges and 6 tubes you weld it all up and make sure the flanges are still flat (weld on a jig and machine after if needed). Then you need to add injector bosses, custom fuel rail probably. I think if you get that far you will start to figure out what you need to make this work.

 

Then get a link/megasquirt whatever and that is a separate mission altogether. 

[tedmunds]

gtr itb's cheaper than 4age, same size as blacktop but they are round and not the weird triangle shape that would be hard to make a manifold for,  and a much better looking unit than the 4age ones. I have a set on their way to me for my sr20de, all you really need is to make a manifold up, injectors of your choice, and a link. one of the struggles of itb's is getting enough vaccume to make your brake booster work properly so you may just have to run unboosted brakes, you might have to do this anyway if the itb/velocity stack is going to hit the brake master

 

I seen RB ones, couldnt find much on anyone using them though. Might be worth a look. 

 

 

Bike ITBS were an option aswell, Just finding 2 of the same sets. 

 

I was planning on running a piggyback ecu of some sort. That doable?

[Spencer]

I think ITB choice is the least of your worries, basically get 20v ones as they are readily available. Only real downside is they look like shit. There are some really cool bike ones around but there are lots of different configurations some wont be able to be split. Look on ebay USA as there is usually shit loads on there for not bad money.

 

I don't think there is any actual piggyback available that will do this, you will be deleting the AFM (i assume its a AFM 1g) and now tuning from the TPS. Look into a micro squirt as it is the nicest balance of cheap/easy to get you going. 

 

That's pretty much it man, who cares what ITB's you use that is trivial shit. By the sounds of your questions what ECU and how are you going to make the manifold are the hard questions you need to figure out.

[kpr]

This ^  

 

1)Fabricate manifold

2)Install aftermarket ecu,

3)Tune  in tps vs rpm

 

If you can all 3 of above, sweet.  But if you have to start paying someone to do stuff, it will get pretty expensive for what you get out of it.   other than the 3 points above, the rest isn't much drama.