stock rod strength? - Miata Turbo Forum -Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 09-18-2006, 05:59 AM   #1
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Default stock rod strength?

Im looking to boost my 1.6L miata. I have looked around net the and found forged pistons for a reasonable price, but rods seem to be on the expensive side. So the real question is....How much boost/hp can stock miata rods take? Would 14lbs be possible with shotpeened/reconditioned rods? Thanks guys!
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Old 09-26-2006, 09:32 AM   #2
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I ran 16 psi on the BBB on my stock rods and made 280 whp. The 1.6 rods are OK. I eventually snapped a rod but that was at 16 psi and a 50 shot of nitrous with some detonation. Not a good combo.

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Old 09-26-2006, 09:34 AM   #3
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14lbs of boost from what? A T25 or a T66?

Instead of thinking boost, think torque/cylinder pressure. As long as you have a good tune, you'll likely be fine up to ~250-275hp/lb-ft. Plenty of people have done more than that on stock bottom-ends, but you're probably not going to get a long life out of it.
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