After this I wanted to run a z32 maf and bought a greddy skyline single turbo adpater from Japan which came with 2 z32 mafs and 2 blitz filters.I sold the adapter itself and one of the mafs and filters and used the other myself with a 3" inlet I bought off Billy187 and then adapted to how I wanted it, including having a bit welded on so I could recirc the hks sqv.
I thought the blitz looked a bit lost in the engine bay as I've cleared so much stuff out of the way and also thought it might be a bit small for my ultimate goal of around 450bhp/400lbft so again went the way of finding something to suit my needs and settled on a large K&N filter.For it to fit though I had to chop the end of the z32 maf off though, losing the screen and the car didn't like this one bit.I think it was because the mesh is there to straighten out the air before it hits the maf and after removing it, the car would want to stall at junctions.It was fine for normal driving though but not ideal.
I started reading up on blow through maf's and I liked the benefits of them-better tickover and throttle response.Plus if you bow off a boost pipe it will still drive.So I started gathering the bits I'd need to run it and thought I'd make a better job of the inlet too, swapping 2x 3" 90 degree bends for 2x 3" 45 degree ones and was able to put the k&n back on exactly where I wanted it as there was no maf in the way anymore.I put the z32 maf on the straightest bit of the forge intercooler piperun I could find and fitted 2x 76mm>63mm reducers.I posted a few pics on the gtiroc and it was pointed out that this would still probably cause running issues.
So I thought feck it, and rerouted the intercooler piperun coming up in front of the radiator, using one of the reducers here to allow a 3" pipe to be in place.The reason being I could then have a much longer length of straight 3" pipe going into the maf to try and eliminate any problems.
This is where I am up to now.I just had a new z32 maf delivered to swap over the one I cut the mesh off and upon starting up the car was very hesitant to rev at tickover with any throttle.I switched the MAF for a none OE z32 i have and it ran better on that for some reason.Anyway, switched back the genuine z32 in and took it for a gentle test drive.The car wanted to stall once at a junction but didn't as i blipped throttle.It doesn't pull anything like it should and the power comes in what I can only describe as pulses with it pulling better at higher revs than lower.
I didn't give it any stick as the car is obviously in need of a remap to suit the new configuration.When I got back home though and the egine was warmed up, the tickover was sitting nicely at 950rpm whereas in the past its always been 1k+.It also reved more freely at tickover once warmed up.