i have looked into this on the roary resurection site, and i think i understand i just wana make sure. im almost positive you can mix and match s4 and s5 rear irons. but im not sure about na and turbo etc.. i have an s5 na block with a messed up rear iron. can i replace it with an s4 turbo ii iron? thanks

 

No.

 

^ Because TII is 4 port and n/a is 6 port.

 

but it will work mechanically correct. im getting rid of my 6 port anyways because im gonna be turboing the na block

 

Still no, the layout of the intake ports between 6-port n/a and 4-port turbo blocks is very different.

 

damn so there is no way at all what so ever...well that sucks

 

I have a spare rear 6 port iron you can have but I'll have to check it over once I get home on wednesday. Its from a series 4, just pay shipping

 

oh thankyou. ill pm you with my paypal account

 

well one more question. if i were to be using turbo ii intake manifolds lower and upper, wont i have to have all turbo irons. so does this mean i will have to buy tyrbo front, center and rear irons in order for the turbo manifolds to fit?

 

Front iron, yes.

 

but the center and rear dont have to be turbo, that makes no sense to me. does anyone have a pic showing the difference between a turbo block and an NA block so ican see how different the intake ports that the manifolds hook up to are? i thought that the turbo manifolds bolted up to an na block, besides a little dremmel work of course

 

there is an adapter plate for that, but yes teh proper way is to use the front center and rear iron of a turbo engine.

 

ok sounds good so if i just use all turbo irons i should be good correct. does it matter if i just use na rotor housings. i imagine its ok.

 

Here's an n/a gasket:



and a TII one:

 

You will need to swap the exhaust sleeves of the housings.

And I am pretty sure you will also need to drill out the freeze plug(s) for the turbo line.

 

thankyou that helps alot. but based of those gaskets it looks like you would have to change the front and the rear iron not just the front like someone earlier in the thred said.

 

wouldnt i be able to just pull out the difuser in the na housing? or should i replace it with a tii sleeve?

 

You could grind out the diffuser, but its a pita. Changing out the sleeves is a little less annoying and the correct way to do things.

 

ok wellll i dont like pita any more then the next guy so tii sleeves it is then