Max boost on stock internals
#2
A friend of mine has been running 15psi on his 95 with a Link and AVO turbo kit for 5 years now. He's got a very good tune IMO. Runs numerous track events and drives it on regular basis. I think the reality is - the more boost you run, the sooner the demise of your engine. BUT there are so many other variables in there that can lengthen or shorten that "deadline". I'd run 15 since I know somebody doing it with the same setup. And the fact that a 1.8 salvage engine is relatively cheap and simple to replace, makes it hard not to do.
#10
I did run 18psi on my 1.6L for 2 1/2 years and it lived through it all. Ran a 8.2 @ 88mph in the 1/8 mile with it too. It was a T3 S60 setup with a similar fuel system to what I have now. Was most likely around 260-270whp. It blew up when I spiked to 25psi ( MBC failure ) on the interstate @ 6500rpm in 4th gear.
#16
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,100
Isn't that why it's funny?
90 Turbo, all Miata motors (90-05) will withstand around 250whp and 225wtq. Above that, reliability begins to suffer. You cannot use a boost level to describe engine reliability.
90 Turbo, all Miata motors (90-05) will withstand around 250whp and 225wtq. Above that, reliability begins to suffer. You cannot use a boost level to describe engine reliability.
#18
Its normally the rods that gives these stock engines trouble isnt it? And those are normally busted by the torque right?
Would pushing the power band higher (through a intake manifold with shorter runners) lower the peak torque slightly, allowing more high end power while reducing stress on the rods?
Would pushing the power band higher (through a intake manifold with shorter runners) lower the peak torque slightly, allowing more high end power while reducing stress on the rods?