Im looking to build a custom turbo kit for my Gen4 and curious on what the safe number is for the motor to hold up to is? Has anyone on here ever turbo their Gen4?
:biggrin: Some make a little more, some make a little less... but it's a pretty good rule of thumb. These high VE motors freakin' love boost, so long as you size & match your components properly.Your psi math is pretty accurate Spaz, 7psi netted me roughly half again of what the n/a whp should be...14psi is netting roughly 110-115% of stock whp on my first gen's stock rotating assembly. I'm probably pretty close to the safe limit on mine.
Those prices are converted from sterling pounds to USD. These are the kits that Holeshot Racing offers. My friend Cecil rode their stage II bike at the Worlds Fastest Wheelie competition last year. He said it was frickin' gnar...Similar price point to the Muzzy kits for the first gen, except those didn't include internals and the s1 and s3 kits weren't very similar. :lol:
If you could get 9 or so other people to do the same I know a few people who would/could put that together. Sadly, for every 20 people that say they'll do it at the drop of the hat, 1 or 2 may actually show up with money. It's damn frustrating.I would totally spend 6k on a 250whp turbo kit if somebody make a 100% no welding or crazy shit bolt on deal.
:biggrin: Some make a little more, some make a little less... but it's a pretty good rule of thumb. These high VE motors freakin' love boost, so long as you size & match your components properly.
As far as how much power is safe? Once you're past that initial 5ish it's a tricky question. With water/meth injection I ran 10-11psi on a bone stock 2nd Gen motor at nearly stock timing levels (pulling about .15-.2 degrees per psi) with no other charge cooling, and it hauled ass & stayed together.... even the stock clutch. I wouldn't try that with an arm and drag racing though... I fear the clutch basket would be unhappy about that; For a streetbike it was fine. Run it out of water/meth or get it a little lean on a big pull and it will go boom when it's wound that tight. I don't know if I'd try 11psi on a 2 mile pull on a hot Arizona day on pump gas either.... it's all about application, ya know?
The rotating assemblies can take a lot more stress than most people realize... people blow a lot of stuff up on tuning mistakes and call it a hardware failure at the end of the day. I reality, the stock parts with stronger head fasteners, stronger rod bolts, and a better clutch package will do outright amazing shit. But I certainly agree there is a limit... most people just prefer to overbuild rather than find out where that is the hard way.