Thread: D2 vs D2a TD5 intercoolers

What was the question??

Originally Posted by Jason789

What was the question??

There is no question in this thread. A while ago there was discussion on intercoolers and I asked Whether there was a difference between them. The answer to it is contained in my above post.

I've changed mine to the D2a update I/C. I believe it offers a 35% increase in cooling capacity. It does not offer massive gains in performance, but it is a noticeable difference and the car certainly pulls away better. All in I paid $100 for mine of Fleabay and I'm pretty happy with the result. I also fitted Terra Firma Silicone hoses whilst I had the I/C out. A Tombie remap and one of his I/C's is the ultimate enhancement but that will have to wait till finances improve.

Dave

The d2 I/c is write restrictive on air flow. I think you will find the air ducts to be much smaller

Originally Posted by iPom

It does not offer massive gains in performance

Bolting on an intercooler rarely makes any performance gains - a larger intercooler really just means you can change other things to make more power. Often people would find that fitting a larger intercooler would have negative effects on performance, the reason is that there is now a larger body of air to be compressed by the turbo, so the turbo has to work harder, but until you adjust the waste gate to suit you may find your boost pressures to be lower with the larger intercooler (but your potential maximum boost pressure levels are higher).

I am pretty sure the D2a also had slightly different ratings than the D2,increase in torque.It was not really noticeable.The intercooler would have helped,but there were also other changes as well.Power was the same.

Originally Posted by scarry

I am pretty sure the D2a also had slightly different ratings than the D2,increase in torque.It was not really noticeable.The intercooler would have helped,but there were also other changes as well.Power was the same.

I just thought it was a part of making the TD5 more emmisions friendly. thicker Intercooler, ECU mapping changes, higher injection pressures, more complex EGR and I'm not sure what else.

Originally Posted by twr7cx

Bolting on an intercooler rarely makes any performance gains - a larger intercooler really just means you can change other things to make more power. Often people would find that fitting a larger intercooler would have negative effects on performance, the reason is that there is now a larger body of air to be compressed by the turbo, so the turbo has to work harder, but until you adjust the waste gate to suit you may find your boost pressures to be lower with the larger intercooler (but your potential maximum boost pressure levels are higher).

Thats lag related due to volume, the thicker intercooler should produce less pressure drop across it and flow better volume and pressure to the motor. I know one that has fitted only a larger intercooler to a TD5 and noticed the gains straight away. I had mine chipped and a larger intercooler fitted on consecutive days and I found the intercooler and chip felt like (infamous but highly sensitive bum dyno!) gave about the same gains each.