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-   -   76mm blowthrough MAF housings (https://www.scoobynet.com/group-buys-356/836828-76mm-blowthrough-maf-housings.html)

Jay m A 10 June 2010 01:20 PM

76mm blowthrough MAF housings
 
Anyone interested in using one?

These are aimed at people using a large turbo, FMIC and running a MAF based system, the main benefit is virtual elimination of the lift of 'judder' you get, especially on part throttle. The housing is designed to accept the OE MAF used on newage cars. Using this will require a remap to rescale the MAF. These also can be used on classics with mappable ECU's (Apexi PFC for example).

I have been running a newage MAF blowthrough on my phase 1 impreza for over a year now with no issues using an Apexi PFC.

It came from a cold air kit which had a 67mm tube (65mm ID) which according to Surrey Rolling Road was very close to maxxing the MAF at 380HP.

Now that I am aiming for higher power I am having a custom pipe made that will house the MAF and have a 19mm take off post MAF for the ISCV. This will sit just before the throttle body, requiring a 76>70 silicone reducing 90 degree elbow TB side (if using a 70mm throttle body), then a 76>63 silicone reducer to mate with your chopped FMIC pipe. The prototype will not have a dump valve take off, but one could be designed in if required.

My calculations suggest that this setup will flow 500HP.

If this proves successful who would be interested in purchasing them?

If I can get 5 interested people I will supply them at cost for the 1st 5 only, the only benefit to me would be the original proving one will be spread across 6 items, rather than the one!

Timeline (once prototype tested and proved) is 2 weeks once 5 people confirmed.

Costs TBA once protoype made

TimH 10 June 2010 02:19 PM

Definitely interested, depending on cost of course. I would need to check the '05 STi throttle body diameter I guess, to make it will fit...and then needs to mate to APS FMIC tubing which is 76mm I believe.

Not sure what the 19mm takeoff is for the ICSV - is that something a classic has that the newage doesnt? There's no take off on my setup as far as I know.

But...

I have been looking in to this myself recently, and looked at some old threads on here and on 22B and nasioc, I think. IIRC, the MAF needs to be well away from the throttle flap to avoid the MAF being in turbulent air?

The recommended position (on an APS FMIC setup at least) was in the middle of the length of hard pipe near the wing...and needs to be before the DV takeoff as well.

Hmmm - sounds like I'm trying to redesign your project here lol.

Jay m A 10 June 2010 02:30 PM

Its all in hand Tim, but I have realised some newage FMIC kits have completely different pipework routes (HDi vs APS), I must say the prototype will be based on a classic, but if successful the same design can be tweaked for the differing FMIC pipes etc.

ISCV = idle control valve (not sure about the S) and needs to be post MAF wrt flow. OE the feed to the ISCV is pre turbo, just like the MAF. DV location needs to be before MAF and post FMIC when running blowthrough, and no need to recirc anymore.

TimH 10 June 2010 03:16 PM

My mistake - yes, of course DV is pre MAF...my bad.

I'll have to look where the feed to the ICS is on mine.

But, anyway, I'm still interested if it will work on mine. Picture here so you can visualise whether your design might be OK for me...and, if so, count me as one of your 5 :)

http://i197.photobucket.com/albums/a...8012010200.jpg

TimH 10 June 2010 03:19 PM

oh...and I'm also going to lose the samco turbo inlet pipe and go for hard pipe I think...so if you have any ideas let me know...or if want to make up a prototype of one of those too, count me in :)

Jay m A 13 July 2010 04:44 PM

Update on this

Have got the prototype made and sourced all tubing, heres what it looks like

I'm concentrating on classic GC8 at the moment, but fitment for Newage with FMICs can be done but I will need to do more research so that it can fit with both APS and hybrid kits (any others please let me know).

http://i9.photobucket.com/albums/a80...072010_001.jpg

http://i9.photobucket.com/albums/a80...u/13072010.jpg

Will be fitted and mapped soon

TimH 13 July 2010 05:15 PM

Looking good :thumb:

Hammer man 13 July 2010 08:46 PM


Originally Posted by Jay m A (Post 9441390)
Anyone interested in using one?
If this proves successful who would be interested in purchasing them?
If I can get 5 interested people I will supply them at cost for the 1st 5 only, the only benefit to me would be the original proving one will be spread across 6 items, rather than the one!
Timeline (once prototype tested and proved) is 2 weeks once 5 people confirmed.
Costs TBA once protoype made

Looking nice. Any rough guide on a price?:thumb:

Jay m A 13 July 2010 10:32 PM

If I can get 5 people then I should get the MAF tube (no silcone) to under £100, hopefully £80

STI_Baly 14 July 2010 04:34 PM

Looking good i must say, any pictures of the quality of welding?

Jay m A 14 July 2010 05:24 PM

1st pic show the welding and it is top notch.

I'll take some more once its fitted and mapped

STI_Baly 14 July 2010 05:49 PM


Originally Posted by Jay m A (Post 9494882)
1st pic show the welding and it is top notch.

I'll take some more once its fitted and mapped

I couldnt agree more it looks very tasty indeed hence why i wanted to have a look Jay, look forward to the pics when you get the chance :thumb:

Jay m A 14 July 2010 08:26 PM

You'll see it in the flesh so to speak at TOTB if its successful :)

STI_Baly 14 July 2010 08:43 PM


Originally Posted by Jay m A (Post 9495322)
You'll see it in the flesh so to speak at TOTB if its successful :)

Will see you there on Sunday then buddy, i'm sure everything will be fine bud...:thumb:


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