Hi Ian
I dont know where you are on your intake set up but if you are looking for some nice big throttle bodies for that nice manifold of yours you got for your chevy, have you thought of getting 4 of these, http://cgi.ebay.co.uk/VAUXHALL-OPEL-OME ... 587e16ec75
a sight cheeper than jenvey or stripping out 4 webbers, with an adaptor stub on the manifold and some silicoln pipe job done (for less than £150 for 4 bodies )
Best regards
Mike
couldn't you just use one of these 8 times on the bonnet? http://www.amazon.com/Milwaukee-49-56-0173-3-Inch-Hardened-Hole/dp/B0017WS1CY/ref=sr_1_19?ie=UTF8&s=hi&qid=1262964838&sr=1-19
Best regards
Mike
Regretfully Injection Perfection want about £1200 squid + carriage + tax and VAT at this end.
Moving on it's a toss up between GSXR TB's or make my own. I don't want to use the Golf or Vauxhall ones you told me about as the inevitable manifold mods will increase the height. It ether needs to be early GSXR seperable TB's or I use the ideas from GC&O and Extrudabody http://extrudabody.com/ to make my own.
Anyone know where I can get butterflies and shafts?
Hi Ian
For throttle plates, you could get 2" su plates and machine your own shafts ( I presume they will be in pairs or fours) as the body itself doesn't need a venturi then a piece (or pieces) of 2" bore thick wall ally tube will do you add a boss on either side made of ally, mount them between two plates and line bore themfor the shafts as a unit.
Or you could make up a jig to make the butterflys with from a piece of bar by cutting it at the correct angle, having first drilled the holes in position where the mounting holes will be, sandwitch the butterfly blanks in place using the mounting holes and bolts through the bar and turn them down between centres on a lathe (I have made 1 1/2 su ones this way).
Or use Hilborn ones (I think they do them as a spare.
Or buy the Vauxhall omega TBs and strip them of the butterflys and shafts and use them, or infact any TB of the size you want.
Mike
I've got quite a few rover 65mm brass throttle plates left over from my 72mm conversions.
I make the 72mm throttle plates by rough cutting 2.5mm ally plate and then making it round on the lathe.
Although its probably easier to identify a part number for a throttle plate from a common OEM setup and order them.
)
