fmic with a t25

[peter535]

i just wanted to know if its bad to put a big fmic on a t25?

 

[mygsx2120]

It is not bad necessarily, but it is pointless. The stock sidemount is plenty efficient on the t-25. Plus if you put on a big front mount, the stock turbo is too small to pressurize the pipes and it will be very laggy. Laymens terms, it makes your turbo spool slow as hell, which is bad because t-25's have no top end, so you are killing your power band.

 

[peter535]

what about the 14b?

 

[mygsx2120]

It is important to size your intercooler and piping to the appropriate turbo. A 14b will be better since it flows more air, but you can still go too big. May I ask what size of intercooler we talking here. I have 12x24x3.5 on my car. I installed it with the t25, as I was waiting on my 16g. It was way too big, and the turbo was very laggy. Once I put my 16g on it was better, but the intercooler is still oversized. I have plans on upgrading to a 50 trim or 60-1 later so I went big on my fmic so I wouldn't have to upgrade it later. Let me know what size fmic you are talking about and your plans for the car, and I will be able to give more clear advice.

 

[CanadianTSi]

If a FMIC adds more than 200 rpms spool with your T-25 then you have a boost leak plain and simple.

To answer your question, no it is not a bad thing, the car will make more power than on the stock sidemount.

 

[delta448]

^X2

I use a 31x12x3 with a 14b and noticed absolutely no difference in spool rpms over the dented and dinged POS stocker it replaced. I did however notice a little increase in engine temps, so sheet metal ducting is next on my to-do list.

 

[peter535]

It is important to size your intercooler and piping to the appropriate turbo. A 14b will be better since it flows more air, but you can still go too big. May I ask what size of intercooler we talking here. I have 12x24x3.5 on my car. I installed it with the t25, as I was waiting on my 16g. It was way too big, and the turbo was very laggy. Once I put my 16g on it was better, but the intercooler is still oversized. I have plans on upgrading to a 50 trim or 60-1 later so I went big on my fmic so I wouldn't have to upgrade it later. Let me know what size fmic you are talking about and your plans for the car, and I will be able to give more clear advice.

its the greddy 24r and i plan on getting a 50 trim down the road but money is a little tight right now so im gonna install a 14b till i can afford a 50 trip aslo i have 2 3/4 catback exhaust 3'' downpipe injen intake mbc uicp boost gauge hks bov and i think thats all

 

[MrBoxx]

I think this question gets asked about once a week. The answer is ALWAYS the same.

For the amount of volume a FMIC + piping adds to the intake tract, it will take about a tenth of a second or less to fill it with pressurized air, meaning little to no noticeable increase in spool time.

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