You bring up a good point, and I agree with you totally in principle. Boost lag sucks and we're not helping by adding plumbing for a FMIC.
However, from what I've seen - top mount intercoolers don't really work. Heat soak really kills them. I have not worked on many TMICs but I did watch a Mazdaspeed 6 get dynoed, and it lost 30HP with every consecutive run due to heat soak. It literally went from 265 to 230 to 205 in consecutive runs with 20 second breaks. This was with some dry ice on the intercooler to help with cooling on a cool day - ~15*C.
The only other car I've seen with a TMIC is the Subaru. Despite the huge scoop - most enthusiasts have found that a FMIC performs better.
I will admit - these cars do have a bit of turbo lag, but they have a good excuse. With boost ranging from a stock 14 to 28psi modified, they make 300-550 HP at the crank with torque to match.
Diesels rely on boost for power even more so than these cars do, so I think the tradeoff (boost lag for power) is worth it. Thats just a subjective opinion of course - the final call is for the owners to make.
Ram
Quote:
Originally Posted by abhik  I would'nt quite agree.
An FMIC set-up will use more plumbing than a top-mounted set-up. But you would of-course have to build an air-scoop for it. A Top-mounted set-up w.r.t the Swift 1.3 DDiS would make more sense as the distance from the IC to the turbo and headers would be shorter, unless the turbo is located closer to the mid of the block near the bumpers in which case FMIC works best. The point is shortest plumbing=less lag. And thats what you should be looking for,the boost will still be the same.
In-short it'll still do the same top-end maybe a little more but it'll get you there faster.
SMIC on the other hand does need dedicated air-vents to operate with optimum efficiency. Its not such in the Swift. Maybe a reason for that is Indian conditions where there is a lot of dust to deal with.
@rippergeo you could try to mount the stock IC in a FMIC set-up and see if it makes a difference, then go in for a bigger IC accordingly.
I would say since the Swift uses a FGT go in for a boost controller and up the boost to increase the performance. They probably cost the same as a tuning box. And you will see a good difference in performance across the rev range. |