will tii exhaust manifold fit a non tii

[TTyMiller]

and if so are there any advantages to having a tii manifold, I recall reding once that there was.

[winstontj]

search the archives.....

+10hp gain

yes it is direct fit

tii manifold has bigger internal ports

[Paul7002]

(nt)

[TTyMiller]

I thought it sounded a bit much , but I don't know thats why I asked. Would you say 5hp perhaps. Most headers give 5 - 10 if I'm not mistaken. Thus a tii exhaust manifold is like having a header?

[Guest Anonymous]

search the archives.....

+10hp gain

yes it is direct fit

tii manifold has bigger internal ports

Not true, the tii is the same as stock carbed models (measure the ports and see for yourself) minus the emissions fittings.

As long as it does'nt have the tubes inside or the thermal reactor as on the 75 models its the same.

NO hp gain, just aesthetics/cosmetics

[winstontj]

(nt)

[Guest Anonymous]

search the archives.....

+10hp gain

yes it is direct fit

tii manifold has bigger internal ports

Not true, the tii is the same as stock carbed models (measure the ports and see for yourself) minus the emissions fittings.

As long as it does'nt have the tubes inside or the thermal reactor as on the 75 models its the same.

NO hp gain, just aesthetics/cosmetics

OK Sparky... No idea who you are but I'll give you this - 10hp gain is a little much. Realistic on a car with a 292 or better cam with 10:1+ compression ratio and maybe only 3-5HP gain on stock cars...

BUT there IS a gain. It's in the archives, on many many many websites... and you can feel it in the seat of your pants. Do a little research before you say no gain. You just allowed this thread to be another tii manifold info thread. There is a clearly a difference. The ports are larger for the #1 and #2 cyl. and it flows better. Just because a manifold does not have smog fittings or air injection ports does not mean it's a tii manifold. I don't need to say anymore - there IS a difference and it DOES yield a performance boost, period and I'll take that to the bank.

OK then... not that it matters who I am, but post your dyno readings with and without a tii manifold vs stock with no smog tubes and we shall see.

FYI just because it says so on some website or several, don't believe everything you hear. The seat of the pants test is subjective to who is in the seat no??? Again, I suggest getting out the vernier caliper and measuring the port sizes if you doubt the truth. Actually a 10hp gain is considerable, so please dont minimize too much. What most people "think" is 10hp is more like 2 or 3 if any----- just like when you wax your car and it looks all shiny so it feels like it drives better. ?? know what I mean?

nuff said

[Napes]

Someone has a link to the photos that show the difference between the non-tii and the tii manifold. The tubes are difinitely larger on the tii. Hope someone posts the link, though I think you could find it forum search. Enter: tii and manifold. Just like that, w/ the "and" in the middle.

Bob Napier

[winstontj]

EDIT: TTyMiller - there is no difference between the manifold's stud patterns. Both tii and regular are completely interchangable. I would reccomend using the later E21 exhaust manifold gasket with the built in heat shield because it's better on your plug wires. Other than that it's all the same just one costs more and gives you more power... the other is on Sparky's ride.....

There you go: Posted twice just incase you miss one Sparky....

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,277384/highlight,tii+manifold/

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,277384/highlight,tii+manifold/

Check out this thread and look at the photos carefully... it's pretty clearly visible that there is a difference. Maybe you are confused, maybe something... but if you don't agree with this, or still think that tii manifolds had air pump injector holes then I'd encourage you to do some more BMW research before putting up posts as bold as yours....

Have a wonderful evening.

TJW

[TMK-001]

RHD cars are no different at all... we cant fit the Tii manifold as it wont fit past the steering box. :-)

Todd

[Guest Anonymous]

EDIT: TTyMiller - there is no difference between the manifold's stud patterns. Both tii and regular are completely interchangable. I would reccomend using the later E21 exhaust manifold gasket with the built in heat shield because it's better on your plug wires. Other than that it's all the same just one costs more and gives you more power... the other is on Sparky's ride.....

There you go: Posted twice just incase you miss one Sparky....

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,277384/highlight,tii+manifold/

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,277384/highlight,tii+manifold/

Check out this thread and look at the photos carefully... it's pretty clearly visible that there is a difference. Maybe you are confused, maybe something... but if you don't agree with this, or still think that tii manifolds had air pump injector holes then I'd encourage you to do some more BMW research before putting up posts as bold as yours....

Have a wonderful evening.

TJW

Maybe it would be a good idea to look at the angle of the manifold in the lower portion of the photo from the distorted "mytii site", it clearly is tilted to show more of the passage than the upper manifold. Smoke and mirrors? no ---- its the same as the bottom one.

Like I said, before getting too carried away, measure the ports to KNOW the difference, there isn't any.

Measure measure measure ---- are we done yet?

(with a caliper to see the actual port size and passage size! internally)

hello

Dyno results with a tii manifold vs a stock one???

or is it all based on internet "reading" misconceptions?

go ahead prove me wrong I welcome it----- problem solved

[Guest Anonymous]

EDIT: TTyMiller - there is no difference between the manifold's stud patterns. Both tii and regular are completely interchangable. I would reccomend using the later E21 exhaust manifold gasket with the built in heat shield because it's better on your plug wires. Other than that it's all the same just one costs more and gives you more power... the other is on Sparky's ride.....

There you go: Posted twice just incase you miss one Sparky....

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,277384/highlight,tii+manifold/

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,277384/highlight,tii+manifold/

Check out this thread and look at the photos carefully... it's pretty clearly visible that there is a difference. Maybe you are confused, maybe something... but if you don't agree with this, or still think that tii manifolds had air pump injector holes then I'd encourage you to do some more BMW research before putting up posts as bold as yours....

Have a wonderful evening.

TJW

I have a header which is where the real power comes from if everything else is in order. Flow in, burn it up, and flow out baby.

[Paul7002]

(nt)

[winstontj]

I agree... Dyno would be best way to tell. Too bad I've only got a stock manifold and will be putting in a header shortly... I'll never really know will I???

[Paul7002]

and comparing. You'd think the tii manifold would have significantly greater volume, ie hold more water.

Anybody got one of each lying around?