AL99

iTrader: (1)

If you read above, the blow through pipe that would be manufactured is for the Denso maf (newage). So i wouldnt be using the MY99 maf anyway..

I havnt tried the DV you mention, But i cant really see what difference it would make. I have used a greddy Type S and the original MY99 dv in all the following configurations to see which works best.

1. my99 recirc only ( terrible )
2. my99 recirc + greddy to atmosphere (hotside of fmic) (OK)
3. greddy only ( cold side) to atmos ( too many problems with Idle AFR )
4. Greddy (cold side as recirc) ( no difference to (1) )
5. no dump valve at all. ( best for reducing lift of judder )

for each variation with the greddy the spring tension was tried soft to hard also.

If i thought a My98 dv would make any difference and would cure it I would be doing it tonight, but in reality it will just be another variation of above. I think the blow through will be the answer for me this time. Its just finding someone to make it / buy from...

banny sti

iTrader: (68)

Frayz blow through is completely different to a suck through maf, some info for you here:

22B Bulletin Board: fun on the dyno

Banny

Ren77

iTrader: (4)

Cheers!

AndrewC

Probably around 4.6-4.7v on the MAF? I've seen nearly 4.9v on one but that car was closer to 450bhp.

I saw a for sale thread on here recently for an 70mm APS Cold Air Intake, stating that it would handle 500bhp+

frayz

iTrader: (7)

On the MAFs with a larger scale than mine it will have headroom for 500bhp

Mine wont.

simbo

anyone else

Pavlo

I've used 70mm maf on 01 sti with 470hp.

simbo

so even 75mm should be over 500 then ?

dynamix

iTrader: (3)

I am using a 70mm CAI on mine with 490 bhp.

It will go to over 500 (will be on dyno today to see whether this is the case) but there isnt a lot more room in it. Max MAF voltage 4.94 volts yesterday - 492 grams/sec.

I will be watching progress on these blow throughs.

frayz

iTrader: (7)

But my V7 only reads to 300

frayz

iTrader: (7)

Okay so we have established that i was wrong and wanted to overkill the size. Lets just keep em at 80mm ID then.

Everybody happy?

AL99

iTrader: (1)

we still need another 6 people..

1. Frayz
2. Simbo
3. Al99
4. REN
5.
6.
7.
8.
9.
10

CDF Racing

iTrader: (49)

Should be able to fit these in October some time but will try to program the machine before to work out the cost

simbo

anyone else

CDF Racing

iTrader: (49)

AL99

iTrader: (1)

err...

what's happening with this now?

i've kinda lost the plot with this one..

is it a no-goer unless we get 10 people? reading through the thread again - it is the full tapered maf tube that you were gonna make isnt it? not just some weld on flange thingy-majig?

if it doesnt go ahead, i might just order one of these and hack the ends off to make my own, expensive i know but not much else i can think of doing. very few, if any suppliers of anything like this (as in maf blow through tubes) in the uk.



or could you just make me/us something like this now?

al.

CDF Racing

iTrader: (49)

We are going to look at a price for the part frayz drew up this week

AL99

iTrader: (1)

KSTech

And I thought it was the Chinese I had to worry about knocking off our stuff. Just kidding, guys.

For reference, we've found the following MAF sizes and the corresponding whp limits (not bhp):
65mm - 350whp
70mm - 400whp
73mm - 450whp
83mm - 560whp

With blow-thru it can be less - significantly less when elbows, transitions, and such are too close in front of the MAF sensor.

CDF Racing

iTrader: (49)

Can someone please confirm the size's everyone is happy with?

Bore size
Diameter size
Length
Place for milled part to start .... i.e 150mm in??


Also, one of the main problems I am facing .... because of our machines, is the round threaded parts where it bolts onto ...... Could these be made seperate and threaded in, if they was air tight of course?

Thanks

STiFreak

iTrader: (4)

Cool thanks for the info ... so based on 20% transmission losses, that equates to:

65mm - 350whp - 420bhp
70mm - 400whp - 480bhp
73mm - 450whp - 540bhp
83mm - 560whp - 672bhp

i.e. Plenty for most of us.

KSTech

Those bosses with the threads are not absolutely necessary. They are a minor detail that maybe gives a part that last 1% quality-wise. I have seen intakes without them, and those just use longer screws into the main flat surface.

CDF Racing

iTrader: (49)

Cheers ! That is good to know!



Can someone confirm to me the size's everyone is happy with as I will try a make a sample up Early next week

frayz

iTrader: (7)

80mm mate

simbo

yeah think 80mm should work for most ppl

AL99

iTrader: (1)

any ideas on price yet?

Will you only make this accept the Denso maf or can you make one that will take a My99 maf or Q45 maf etc? - the only reason i ask is because i know the denso mafs are expensive and using my original or a Q45 would be much better cost wise for me - and other classic users too.

CDF Racing

iTrader: (49)

Guys,

I have been looking at this and the best price I can offer for only a 5off would be £85 each, if we can get 10 then it goes down to £65 each + delivery.

Should be able to make them for any maf i you have the size's or a sample for me to borrow.


Please let me know what you think

thanks

frayz

iTrader: (7)

Personally for me, £85 is too much when i can get the boss from KS Tech and weld it myself.

CDF Racing

iTrader: (49)

Yes I understand that ..

That was priced from solid bar as we talked about last night , I haven't had a chance to phone the suppliers to see if they do tube that size .
I not after ripping anyone off or anything, it's just material would cost £20-£25 a bar .... then there is a lot of work for me programming,milling etc after

I will deffo get a quote on tube tomorrow

frayz

iTrader: (7)

I understand that Chris and fully accept the work involved. It was by no means a dig at all.

Just a too expensive a solution to my issue.