240zip Posted January 5, 2012 Share Posted January 5, 2012 Has anyone tested their distributors on a Sun Distributor Testing Machine? We have a 504 and a 506 (similar machines but the 506 tests up to 12,000 engine RPM). I know the whole Ferrari and Fiat people live by these machines and we even have special adapters for their distributor models. The machine will allow you to create a very accurate graph of the advance curve and even has a vacuum pump to test and show the impact of the vacuum advance on top of the mechanical advance curves. You can also test and dial in distributors such as the Mallory Unite ones with those little counter weights. Quote Link to comment Share on other sites More sharing options...
johnc Posted January 5, 2012 Share Posted January 5, 2012 Yup. The Porsche engine builder across the alley has one and I've modified a few Hitachi distributors to get a faster ramp up on the timing curve for racing Datsun. Quote Link to comment Share on other sites More sharing options...
240zip Posted January 6, 2012 Author Share Posted January 6, 2012 If anyone in Colorado wants to play with the machine and test their distributor let me know ... Quote Link to comment Share on other sites More sharing options...
Genesis Posted January 8, 2012 Share Posted January 8, 2012 Where in colorado are you located Quote Link to comment Share on other sites More sharing options...
240zip Posted January 9, 2012 Author Share Posted January 9, 2012 North ... near Longmont ... unfortunately a haul from the Springs Quote Link to comment Share on other sites More sharing options...
Genesis Posted January 10, 2012 Share Posted January 10, 2012 Yes it is, I know this is off topic but do you know anywhere I can go for advice setting up my webers here in colorado. Thanks Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted January 10, 2012 Share Posted January 10, 2012 (edited) Check into Jeff Winter's shop, he's been running Zs for years at Second Creek and now High Plains. He knows Zs and carbs inside and out. His website.. http://www.rallye-sport.com/ He left his contact information over on Pelican parts... http://forums.pelicanparts.com/porsche-911-technical-forum/358719-technical-wizard-grady-clay.html Edited January 10, 2012 by SleeperZ Quote Link to comment Share on other sites More sharing options...
240zip Posted January 10, 2012 Author Share Posted January 10, 2012 (edited) Jeff helped with my 42DCOE's ... he has a complete jetting set-up. He doesn't have a dyno but will rent time and then just charge you by the hour for the tuning and dialing in. Expect perhaps $200 to $300 to really dial-in the carbs if you're starting with a decent rebuilt or new set. If you want to get your triples rebuilt, I recommend Rex Chalmers. He costs about $100 a carb and you can supply the rebuild kit or he'll do it. That's a complete tear down and rebuild to like-new. If you're running triple webers, you absolutely need a distributor with a mechanical advance. I use a Mallory, Pertronix, MSD 6A and that's in combination with a good low pressure high volume pump and secondary regulator. with what you spend on getting triples right, you can go with ITBs and MegaSquirt for less. Of course I absolutely love mine. Edited January 10, 2012 by 240zip Quote Link to comment Share on other sites More sharing options...
240zip Posted January 10, 2012 Author Share Posted January 10, 2012 btw ... I noticed my pictures show my old OEM vacuum advance distributor ... it had a serious 'bog' problem at around 2,000 RPM. I still drove the car at HPR, but it's now much more responsive from the start. Quote Link to comment Share on other sites More sharing options...
19762802+2 Posted January 10, 2012 Share Posted January 10, 2012 I think Lanier's Speed shop here in Colorado springs has a Sun Distributor machine, I've only seen a glimpse of it through the window though haven't been to the shop myself actually but its in downtown off Vermijo and Nevada. Seems like a pretty cool shop otherwise. Quote Link to comment Share on other sites More sharing options...
Genesis Posted January 11, 2012 Share Posted January 11, 2012 Thanks guys for all the info, this is what I was looking for, I have been driving from shop to shop looking for someone with experiance and kept getting the run around. Sorry for highjacking the thread Quote Link to comment Share on other sites More sharing options...
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