Cut T25, What Size Coupler?

[Brock96gst]

i recently installed xspower fmic, what size coupler is being used to bite onto the t25. my 2inch that came with the kit keeps blowing off no matter how tight i get the clamps after about 2-3 mins of driving under wot. i've seen a 1.5" to 2.0" coupler. what did you guys use?????

 

[kenamond]

i recently installed xspower fmic, what size coupler is being used to bite onto the t25. my 2inch that came with the kit keeps blowing off no matter how tight i get the clamps after about 2-3 mins of driving under wot. i've seen a 1.5" to 2.0" coupler. what did you guys use?????

The compressor inlet (and maybe the outlet) is 2.125" on the T25. I've been able to get a 2.5" coupler to seal to my FPB28 which has the same inlet/outlet sizes as the stock T25. If your LICP or intake pipe are a different size, get a reducer from that size to 2.5" (again, I'm not possitive about the compressor outlet diameter). My Dejon intake pipe has a 3" outlet and a 3" coupler, but it included a 1.5"-long piece of 2.5" ID hose that you could insert into the 3" coupler on the compressor end. I could then seal it up with the worm clamps. They do sell reducer couplers if you want to go that route.

Also, you might try using t-bolt clamps if the worm-drive hose clamps won't cut the mustard.

 

[shiner6n]

this may sound stupid but when you put the coupler on make sure you clamp on to the turbo not just the coupler

 

[Brock96gst]

i used the supplied t bolt clamps, again i cut the turbo to make it downward firing to connect to the lower piping going to the driver side. the 2" coupler will hold fine as long as i'm driving normal. only when i'm at max boost or wot does the interccoler piping blow from the turbo. it blew off the car completely and before i left i triple checked all clamps for tightness. i just ordered a 1.5" to 2.0" coupling hoping that will do the job. i was going to go to a hardware store and pick up a 1.5 to 2.0 rubber coupling to get me by until the silicone comes in. i just hope a 1.5 will work. if not i'll just break down and get the 16g like i should have in the first place.

 

[twicks69]

the butyl rubber one won't last -- with the pressures and with the temperatures next to the manifold. You will need a silicone coupler.

Why don't you measure the outlet diameter and the IC pipe diameter, then purchase the correct part for the job? It seems easier than asking us, because you will have difficulty fitting a 1.5" coupler onto a 2" pipe.

Here are a couple links to a quality shop that has good 3-ply reinforced silicone reducers in stock: (PEGASUS AUTO RACING, New Berlin, WI)

2"-1.5" http://www.pegasusautoracing.com/productdetails.asp?RecId=2825

2-1.75" http://www.pegasusautoracing.com/productdetails.asp?RecId=2826

2"-2 1/8" http://www.pegasusautoracing.com/productdetails.asp?RecId=4691

2"-2 1/2" http://www.pegasusautoracing.com/productdetails.asp?RecId=2827