3400 TB

[OldsmoBeast]

Hey... I've seen this mentioned a few times here, but I need detail... the yard I go to has a Chevy Venture with the 3400, and I'm going to have all the coolant out of my car fairly soon to replace my water pump, so I've been considering swapping my 52mm TB for the 56mm out of the minivan. does anyone know if it'll bolt right up and fit? or will I need additional mods? is there anything else I should get from that van too?

 

Thanks everyone!

 

YK

[Brian P]

Yes, I am living proof. Direct swap, but you'll need to swap over your throttle linkage. If you have a '96-97 (forgot offhand) grab the lower and upper intake manifolds and they will directly replace yours, if you want to get in that deep!

[no1kicker]

The 3400 TB wouldn't happen to fit on a 3.1 would it? Doubt it, but if it did that would be cool.

[Canada]

My car is living proof too...

[Brian P]

The 3400 TB wouldn't happen to fit on a 3.1 would it? Doubt it, but if it did that would be cool.

 

linkage is different, bolt locations are opposite of each other unfortunately.

[OldsmoBeast]

okay, thats wicked...Now I just have to wait until tomorrow (Monday) so I can go dig that stuff up out of the j/y...can't be too hard to pull!

[94CutlassSLCoupe]

Does the throttle body have to be from a van?? Or will an alero one work?

 

Also, I thought that the ports in the heads might be different between the 160hp 3100 and the 175hp 3100/3400.

[slick]

The alero one will work fine too. You will just have to change the linkage like stated above. The manifolds should bolt up. *I think* you may have to do something with the EGR, but I'm not totally positive on that.

[Brian P]

from what Ive seen, the Alero TB isnt as big as the van's. But you're more than welcome to measure them.

[Canada]

They are both 56 mm. I have measured one from a van (my 3400) and one on a 2000 GA.

[no1kicker]

Ok, 56mm vs. 52mm. What kind of gains are we talking here? 5hp? Wonder if it'd be worth the effort. How much would a throttle linkage run?

[Brian P]

thats about right. Just swap your linkage onto it. The gain I noticed was from 4k up. It was noticeable but not more than 5hp.

[no1kicker]

Ok. So I can use my linkage, I just have to bolt it to the other side? That sounds good, meaning nothing else to buy. If there is some noticable gain I might keep an eye out for one. Thanks.

 

Always cool to find out about another mod you can do.

[Brian P]

are you bolting it onto a 3100? It wont work on a 3.1/gen 2 plenum. The TB won't line up, unless you possibly go with an adapter plate, even then you might have to change out the throttle cable.

[OldsmoBeast]

are you bolting it onto a 3100? It wont work on a 3.1/gen 2 plenum. The TB won't line up, unless you possibly go with an adapter plate, even then you might have to change out the throttle cable.

 

I know this wasn't directed at me, but yes I am.

 

haha

 

thanks

YK

[GutlessSupreme]

are you bolting it onto a 3100? It wont work on a 3.1/gen 2 plenum. The TB won't line up, unless you possibly go with an adapter plate, even then you might have to change out the throttle cable.

 

no, he wants to bolt it onto his TGP.. 3.1 plenum

[no1kicker]

Hmm...must have read wrong. :oops: Oh well.

[THe_DeTAiL3R]

So there is a noticeable gain from a 3400 TB and just that alone? I'll have to add that to my mod list. I've taken off the TB before (today actually, to get at the damn t-stat) and it was very easy. I'd like to do runs at the track with the stock TB and then go again with the 3400 to see if there is any noticable difference..

 

I wish we had a group buy or something on the larger TBs for 3100s.....

[slick]

Like stated above, the gain won't be noticable unless your getting on your car. Personally, I wouldn't waste the money on the TB, unless you swap the heads and manifolds too.

[maybe2fast]

I wish that shit would work on the 3.1MPFI, you guys had me all excited

[slick]

It'll work if you swap the heads and manifolds.

[manitcor]

5hp from a 3400 TB, most likely not...

 

there will be some gain, you will notice gain mostly in your top end however I would reccomend taking your plenum and port matching it to the new TB. A simple die grinder or even a dremel works well on the soft alumium.

 

The 3400 upper and lower intake runner diameters are much larger than the 3100 (excpet on the new style 3100 UIM and LIM which is the same as the 3400). The heads also sport larger valves.

 

For a quick easy mod go for the TB and port match the UIM to the new TB. While your at it go ahead and kinfe edge the throttle plate as well.

 

The gains will be small but noticable and certainly worth it for as easy a mod it is.

[maybe2fast]

How big is the 3.1 MPFI's TB 52mm?

[Brian P]

For a quick easy mod go for the TB and port match the UIM to the new TB. While your at it go ahead and kinfe edge the throttle plate as well.

 

The gains will be small but noticable and certainly worth it for as easy a mod it is.

 

we're not talking about putting on a 65mm throttle body or anything, you DONT NEED TO PORT MATCH a 56mm throttle body even on the Vin M style manifolds. Unless someone did it for me without telling

[manitcor]

For a quick easy mod go for the TB and port match the UIM to the new TB. While your at it go ahead and kinfe edge the throttle plate as well.

 

The gains will be small but noticable and certainly worth it for as easy a mod it is.

 

we're not talking about putting on a 65mm throttle body or anything, you DONT NEED TO PORT MATCH a 56mm throttle body even on the Vin M style manifolds. Unless someone did it for me without telling

 

really?

 

hehe, see what I get for assuming shit, I havent done it and just went by glancing at a couple parts laying around. I replaced my 3100 a while ago. :oops: