Spot the difference (snail-net beware)

Woo · Postby **Woo** » Sat Jan 19, 2008 12:42 pm

The stock throttle body (55 mm) is only good for 300 HP, so it had to go. The only problem is that as everything in the MX5 is such a tight squeeze. The only replacements available were too long and my intercooler bend is tight enough as it is ....

Alternative,

I'm happy with the result, gives me ~30% more area (75 mm). The Phosphour bronze for the butterfly is coming on Monday, so should be ready to fit next week 'bout time too

btw the stock TB is on the right
Woo

neil d · Postby **neil d** » Sat Jan 19, 2008 2:02 pm

Did you buy this item or get it machined?

I'm keen to find out more details.

Neil

mr_rotary · Postby **mr_rotary** » Sat Jan 19, 2008 2:39 pm

Very nice and well made. Any performance gains from one of these on an N/A engine?

Woo · Postby **Woo** » Sat Jan 19, 2008 4:12 pm

neil d wrote:Did you buy this item or get it machined?

I'm keen to find out more details.

Neil

Brought the billet of T4610, machined it on a FANUC lathe and OKI 5 axis mill (both CNC via Mastercam), Neil. Really only built as a one of, I'm not trying to sell them.

Mr_rotary, upto 300 HP, the throttle body isn't a restriction, so it wouldn't help N/A (probably make the low revs worse). Generally the manifolds, valves and head will be the bottleneck before the TB.

FWIW, Skunk make a 70 mm (Skunk2 actually) that is good for 6-700 HP that with a bit of modification would fit, unfortunately the IC to TB pipework comes from below on my F/I, hence the lack of room to fit one of these.

Anyone contemplating the Falcon TB swap, imho it's more agro than it's worth (totally different configuration).

Cheers,
Woo

neil d · Postby **neil d** » Sun Jan 20, 2008 10:15 pm

I was looking at a similar job and just interested in if you fabricated it or purchased it over the counter.

Looks good.

Neil

OMY005 · Postby **OMY005** » Sun Jan 20, 2008 10:45 pm

Woo wrote: OKI 5 axis mill

Nice machine.

Good job as well.

Andrew.

Sean · Postby **Sean** » Wed Jan 23, 2008 10:16 pm

AVO used to rebuild standard one to (ithink 4mm) oversize, complete swap over item, can't remeber exact specs or price.

Hardest part is getting the new throttle plate to seal well.

Postby **Okibi** » Wed Jan 23, 2008 11:11 pm

Wow all sounds and looks very impressive :shock:

Woo · Postby **Woo** » Thu Jan 24, 2008 9:43 pm

Sean wrote:Hardest part is getting the new throttle plate to seal well.

With the CNC most of the hard work is done for you. Of course you could always put a smeer of latex on like Mazda did :idea:

Thanks
Woo

hamish71 · Postby **hamish71** » Tue Jan 29, 2008 7:16 am

Yes, have seen that thread....note that \"Woo\" did this himself, and is not a \"supplier\" as such. I have been chatting to him about the options.

I was hoping that someone could verify whther there was a melbourne business, such as efi hardware, had done this sort of work for mx5s before.