Question for the people with K24-7400 swaps

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Question for the people with K24-7400 swaps

Postby Noisy Cricket » Sun Dec 03, 2017 1:13 pm

Is the turbo ridiculously high-pitched compared to other units?

I thought I was hearing an electric air pump at first. Nope, that's the turbo spinning up. It sounds about an octave higher than the teeny tiny TD04 in my soon-to-be-ex-Volvo.
Pete, that rallycross guy

'06 Volvo S60 R (Swedish GTR)
'84 RX-7 (bridge ported, fuel injected, way modified dirt buggy)
'86 QSW (MC2 goes here. Eventually.)
'81 RX-7 (restoration project)
'73 RX-3 (poor man's Mk2 Escort)
Noisy Cricket
 
Posts: 191
Joined: Mar 25, 2013
Location: Cleveland, OH

Re: Question for the people with K24-7400 swaps

Postby Neacail » Fri Dec 08, 2017 10:32 pm

Mine only gives a quick whistle when it spools, and then is more of just a whoosh.
It has an 11 blade billet wheel though, so YMMV
Neacail
 
Posts: 4
Joined: Jul 23, 2016

Re: Question for the people with K24-7400 swaps

Postby Lucky » Sun Dec 10, 2017 12:36 pm

I know when I installed mine I had a really large whistle too, never thought much about it until I installed my 11 blade billet wheel. That's when I saw that one of the old Wastegate mounting holes is straight through into the compressor discharge and not a blind hole lol my bad. I think it was a m6 bolt, just cut one to fit and not restrict the airflow.
Something to look into anyways.
Lucky
 
Posts: 2
Joined: Jul 19, 2015

Re: Question for the people with K24-7400 swaps

Postby Noisy Cricket » Mon Dec 11, 2017 7:27 pm

It works fine (actually this car is stupid for me, it just GOES and feels like a video game) but the turbo is almost completely inaudible except on cold start, when it spins up because of the high idle and I think Volvo is doing some really wonky things with cam timing and ignition retard because it gets the worst fuel economy I have ever seen when it is cold, and one of my other cars literally throws half of its fuel down the exhaust pipe unburnt at low speed.
Pete, that rallycross guy

'06 Volvo S60 R (Swedish GTR)
'84 RX-7 (bridge ported, fuel injected, way modified dirt buggy)
'86 QSW (MC2 goes here. Eventually.)
'81 RX-7 (restoration project)
'73 RX-3 (poor man's Mk2 Escort)
Noisy Cricket
 
Posts: 191
Joined: Mar 25, 2013
Location: Cleveland, OH


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