Thread: Intercooler and fuel efficiency

Originally Posted by steveG

Just be warned, that once its up and running you'll likely never intercool it
I've even got a WTA sitting on the shelf, but its just so reliable and trouble free I can't bring myself to start pulling it apart and messing around with it.

I've been meaning to throw a thermocouple in the inlet to see how hot the air is from the turbo, but haven't got around to it.
If yours has a working wastegate it will be interesting to compare EGT's etc as mine has the w/g wired shut - I didn't have a suitable actuator at the time I fitted it, and its never made it far enough up the priority list since!

Next build will be a better turbo and an intercooler, but thats a wee way off yet. The T25G still does a pretty reasonable job.

PS: I need to do some work to improve inlet restriction as my setup easily trips the filter indicator even with a brand new filter. Try and keep everything as big and smooth as possible on the inlet side of the compressor (air filter, snorkel, ducting etc) and stay away from corrugated hose to connect your snorkel up with.

Steve

I was going to follow your lead with the wastegate but now you've got me thinking.
Mine seems to work but have to fab a bracket.

From my experience after fitting a wta intercooler it was a noticable increase in performance ,lower egt . It basicly was a gear differance . What i mean is that if you normally go up a hill in a particular gear on the highway ,you would find you could stay in a higher gear and not have to change down. Therefor the inter cooler is lowering the temp of the air entering the engine thus producing more power . I did the same to a Nissan patrol 4.2 turbo . We dynoed the vehicle on the Friday and re did it on the same dyno on the Monday -6hp increase at the rear wheels.Hope this helped

Graeme