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Old 02-15-2021, 01:05 PM   #1
CooperV
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Default How much boost can I run?

So I have a 1987 Volvo 760 turbo intercooler, and I know my car has the smaller rods. But Im wondering how much boost it is safe to run until I get a engine with the bigger rods? Is 12-13 psi still safe?
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Old 02-15-2021, 01:33 PM   #2
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In before how PSI a stock can support.

If your car is at a good stage zero state, running healthy and you run quality premium fuel, running 13 psi *should* be safe. I would invest in getting a second o2 sensor bung welded to the lower part of your downpipe and running a wideband gauge so you can monitor your AFRs.
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Old 02-15-2021, 02:20 PM   #3
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Originally Posted by CooperV View Post
So I have a 1987 Volvo 760 turbo intercooler, and I know my car has the smaller rods. But Im wondering how much boost it is safe to run until I get a engine with the bigger rods? Is 12-13 psi still safe?
if your car is filthy inside with a bunch of fastfood wrappers in it stock 6lbs of boost is too much. if your grandma drove it 69k miles, then died and gave it to you then you can run 25psi on stock internals until you blow it up.
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Old 02-15-2021, 02:23 PM   #4
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how psi stock cna support?


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Old 02-15-2021, 03:54 PM   #5
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So I have a 1987 Volvo 760 turbo intercooler, and I know my car has the smaller rods. But Im wondering how much boost it is safe to run until I get a engine with the bigger rods? Is 12-13 psi still safe?
plug the hose and run all the boost!
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Old 02-15-2021, 04:51 PM   #6
Jussi Alanko
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The rods will bend something about 250hp, which can be make at 13psi or a 24psi, so it is kinda hp thing, not boost thing.
It depends lot's of what head you had and what cam you had etc etc. But i say if it's totally original i won't run it above 15psi.
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Old 02-15-2021, 06:48 PM   #7
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Its a torque thing. HP is torque times speed. Boost spikes at low speed fo more damage, as well as hard detonating at low/mid speeds.
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Old 02-16-2021, 03:40 PM   #8
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In proper stage zero I wouldn't run a small rod engine over about 11-12psi. Those engines also have the worst pistons for wear and causing slap. As suggested above get a wideband O2 gauge to monitor the engine mixture.
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Old 02-16-2021, 04:36 PM   #9
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Originally Posted by Jussi Alanko View Post
The rods will bend something about 250hp, which can be make at 13psi or a 24psi, so it is kinda hp thing, not boost thing.
It depends lot's of what head you had and what cam you had etc etc. But i say if it's totally original i won't run it above 15psi.
I bet you I can bend a rod at 108hp
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Old 02-16-2021, 04:40 PM   #10
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I bet you I can bend a rod at 108hp
I tried but the 'M' rods wouldn't give.
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Old 02-16-2021, 06:30 PM   #11
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