06-23-2009, 04:56 PM
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#11 (permalink)
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Track Member
Join Date: May 2009
Location: San Diego
Posts: 645
Drives: a car
Rep Power: 645
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Your assumption on the compression ratio is not accurate. HRs run 10.6 compared to the 11.0 in the VHR and they (HRs) have been boosted successfully for over a year with 10+psi. For the record I only know of 1 failure reported (my 350z .com forums) since the HR turbo kits came out. The VHR, despite the 11.0:1 compression with boost just fine and VHR have stronger rods than HR too.
Quote:
Originally Posted by kannibul
The thing that gets me is that people are strapping on a turbo (or any other forced induction) to an engine that has 11:1 compression. That's just asking for it to blow up...
I remember the rule of thumb is 8:1 for blowers. I can't imagine he amount of octane boost one would need to run for 11:1 to prevent detonation / pre-ignition, if it'd even run correctly on 91...(since the car already takes 91...)
I dunno, I guess I'm not THAT into power. This car will break loose with an automatic transmission up into 3rd gear...that's plenty of power. After that, it's a matter of getting it to the pavement and stay there...
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