Originally posted by GNVenom
I have the plumbing ready to tig, two massive waste gates, and a custom made front mount intercooler. Now my question:
What do I need to know about twin turbos, anything in particular about trying to balance them, control the boost, etc.?
Comments?
Suggentions?
<ear to the rail>
Regards,
John Spina
Looks like a cool project, engine and wiring work look extra clean and body looks good in the works, reminds me of painting several cobra kit cars ( Contemporary mfg. and West coast mfg.), do you know if Contemporary ever made a Shelby Daytona coupe ( they were talking about it)? and has Shelby or whoever owns the name, no longer allows the kit industry to use the Cobra name? I am going down a similar path with a twin turbo Buick into a scratch built custom, don't want to use the name ( have to come up with my own) but looks very similar to the Ferrari F50. Though my car and set up are different, mid engine using TH325-4L transmission, but general twin turbo set up similar to yours at least in plumbing configuration, that is L/R heads have a header to turbo each, turbos Y into intercooler( the best I can tell from your pictures), and intercooler to TB.
As long as both turbos are working the same, in this configuration balance is already handled, unlike plumbing one turbo to opposite bank and visa versa with a crossover tube. The exhaust/ downpipes would be just getting to fit chassis, I am not sure of primarily the electronics part of things. First the MAF , seems that connecting to one common MAF would be easiest electronically but adds to the plumbing clutter as opposed to two separate air cleaners. Second would be hook up of O2 sensor or sensors, not sure about that one. Third is how each turbo is performing in lag, boost, etc. vs. a larger single. Because we are building cars that will also see corners, that for me at least seems to be the big advantage of twins, the driving conditions need fast spool , up and down shifting, etc. My set up is a lot easier to put together only because I have the room and wierd trans to do so, using stock passenger header,turbo, bracket on left bank as in the GN, and just duplicating on the right bank, re clock rear turbo as needed for plumbing etc. looks stock beacause it kind of is!
Looks like your project is going to move along alot faster than mine though I hope to complete in a year, the engine will not be ready to fire up till early spring, I can watch your posts and see your solutions, though I plan to keep looking also, the o2 thing is my biggest concern and would like to clean up the air cleaner MAF plumbing a bit. If anyone has any experience/ working twin turbo combo advice (electronic hookup, cam used, etc.)let us know
