meth + vortech
My understanding is that the power gain with boost by raising compression is nominal. What is the justification for building a motor that runs closer to the detonation threshold for a given fuel? Is a few percentage points on peak horsepower gain worth the risk of running near the detonation threshold and lack of flexibility to run a lower octane fuel?
I don't have a specific reference, but some images from texts have been posted on the net:
I don't have a specific reference, but some images from texts have been posted on the net:
Ok... another newb question (and I realize this is all likely hypothetical)
Let's assume you do a mild bottom end build for a blower (in my case, ProCharger rather than Vortech, 9psi) Bearings, forged rods/pistons, L19 studs etc. w/ stock heads/valve train.
BUT: you didn't have access to E85 every time (like if you were traveling)
Could you do 11:1, and still run one map for 93 that would be safe and another more aggressive map for E85? Or would you be setting yourself in a position to where you would have to run E85 / meth mixture only?
Oh - and second on the needing new rods/pistons. The rods especially are a weak point on the VQ for higher tq.
Let's assume you do a mild bottom end build for a blower (in my case, ProCharger rather than Vortech, 9psi) Bearings, forged rods/pistons, L19 studs etc. w/ stock heads/valve train.
BUT: you didn't have access to E85 every time (like if you were traveling)
Could you do 11:1, and still run one map for 93 that would be safe and another more aggressive map for E85? Or would you be setting yourself in a position to where you would have to run E85 / meth mixture only?
Oh - and second on the needing new rods/pistons. The rods especially are a weak point on the VQ for higher tq.
in your case i would run 10.1 or stock compression and do 93 which would be safer on pump gas then switch to an e85 map just for fun
the biggest unknown is not so much power, but off boost response. you dont need much change in power to have a nice gain in the vacuum side of pedal response.
My understanding is that the power gain with boost by raising compression is nominal. What is the justification for building a motor that runs closer to the detonation threshold for a given fuel? Is a few percentage points on peak horsepower gain worth the risk of running near the detonation threshold and lack of flexibility to run a lower octane fuel?
My understanding is that the power gain with boost by raising compression is nominal. What is the justification for building a motor that runs closer to the detonation threshold for a given fuel? Is a few percentage points on peak horsepower gain worth the risk of running near the detonation threshold and lack of flexibility to run a lower octane fuel?
I don't have a specific reference, but some images from texts have been posted on the net:
I don't have a specific reference, but some images from texts have been posted on the net:
Compression is subjective to the application, raising compression NA with these engines you networth maybe 20 rwhp on average at the most? vs a turbo or sc application where compression creates a huge difference.
+ this
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