ShaZam508

I've been driving with my knockoff for about a month now and I have no complaints. The spring is pretty stiff but I can feel the throttle body get softer at very high vacuum like if you downshift and land at 5k-ish. These engines make some crazy vacuum.

soot

This might be a dumb question/threadjack, but in theory I could get one of these and just dremel out the bolt holes on my 1.6 intake manifold, right? I've been kinda upgrading everything around my 1.6 but only getting stuff that will swap over to the 1.8 once my 1.6 goes. I'm getting frustrated with the 1.6 IACV setup and if I'm going to change it I might as well go to the bigger TB at the same time if it will fit.

ShaZam508

Do you have Megasquirt? If not the TPS won't work since the 1.6 used an on/off tps while the 1.8 used a potentiometer.

germanmiata

That doesnt work. 1. and 1.6 TB has the top holes the same but the bottem ones are on different position. You need a adapter plate.

soot

Yes, I am running a standalone EMS, and yes I understand the bolt holes don't match up, that's why I mentioned a dremel. After some further review it looks like it would be a complete new set of holes.
It was more of a question on if there is enough 'meat' in the 1.6 intake manifold TB flange for me to drill the new holes and if the ports match up. I'd just check it myself, but I don't have a 1.8 TB kicking around to test fit with.
Regardless, I don't want to threadjack this any more than I have.

germanmiata

The 1.6 and 1.8 holes overlap. You have to JB weld the old ones and then drill and cut new threads. A lot of work for no real benefit but its possible.

soot

Awesome, this is what I was looking for. I know it seems silly, but I want to have the internally routed IACV from the newer 1.8L and if I'm going to put new stuff on, I might as well install an upgrade for 1.8 for when the 1.6L finally gives out. Thanks for the help.

whitrzac

iTrader: (1)

You would be a good candidate for the junk2 manifold.

1.6 mounting options, 1.8 throttle body too.,

aidandj

iTrader: (5)

What 1.6 mounting options? Different port spacing

soot

Exactly. This is why I'm getting the TB now, and drilling the stock 1.6 manifold. There's no aftermarket 1.6 manifold options because it would be dumb to buy one. I'm just buying parts that will fit on the 1.8 once the 1.6 gives out.

whitrzac

iTrader: (1)

I thought it fit the 1.6 too?

18psi

iTrader: (76)

this thread got real dumb real quick

ryansmoneypit

iTrader: (6)

wasted 5 minutes of my break.

add lightness

Well I decided to try one of these too. Just a few observations that haven't been noted yet, one major: The difference in the idle screw boss location shown back in post 31 is significant enough that it doesn't line up with the matching flange on the manifold, shown installed on a squaretop:




Doesn't match up with the OEM or supplied gasket:




It's close enough that it will work if you shove some RTV in this gap, but if you don't notice you'll have a nasty vacuum leak:






Also the bore on mine is nice and smooth, unlike some others'. Still has burrs around the holes though:




Haven't taken it apart yet but I'll post back if I find anything else interesting. Pretty sure the pulley on mine is nylon or plastic of some sort.

ridethecliche

iTrader: (2)

Do all the recent units that folks have received come with aluminum throttle cams?

germanmiata

Mine came with aluminum cam a week ago

ryansmoneypit

iTrader: (6)

three months old, aluminum cam.

bschonman

Just installed mine on my squaretop manifold. As lightness stated, there is a MASSIVE discrepancy with the gasket and idle screw location. Luckily I spotted it after my brake clean bath started leaking profusely.

Also, my TB has a very bad tendency to get stuck shut if I let it "snap" shut. Adjusting the screw rod to preload it a little bit helps, but I am afraid it will wear back into being a problem. Any thoughts on this?

ryansmoneypit

iTrader: (6)

Can also confirm the idle air port sucks. You can see where it was , the porosity in the arc shape was original location. I put a ball bearing in the hole, welded over the top of it, then removed the screw and took the ball out.

Overall, I think if you dont have a bunch of tools and fab skills, this thing sucks.

Mud_Duck

Looks like there is an update with a semi-round shaft? Any problems to report with the early versions?

Ali Express