Note-Edited and consolidated to make it fewer posts.
Photo:It was still pulling, as it tends to with FI, well past 6000, was the point of the picture.
Redline, thats a great topic/question Mine set to = 7400, after lots of testing past there and much discussion with Vortech, -Yes, it is err'ing conservatively by intent.
This is a valid debate topic, I had a higher redline when I was NA. I know folks are boosted running past OE rev limit doing "Just Fine" (ehm for now), but I couldnt justify it in terms of physics vs Dyno plot vs risk vs tapering off volumetric efficiency, tho extended beyond stock does make more power, its diminishing returns on most FI charts.
think twice about the kool aid being passed around about running extended rev limits into 8000+. Hey, I'm not here to tell you to not do it, just raising a caution flag.
There is such a thing as valve float and I am betting the hardness of stock metallurgy will give the high revving crowd lots to think of when those odometers roll over 75000 miles. We'll see how FA20 does.
I have done this before and had to remove a SC from my car due to excessive blow by and fuel contamination and such-that car had the redline raised, tuned, SC, etc etc also
so making more power above redline is indeed a reality, and so is the added wear. I pass, personally.
Quote:
Originally Posted by cf6mech
Not sure if he has seen it intimately up close and been side by side by a proffesional engine builder (who builds 500whp Subaru engines on a regular bases) like I have when we forged my FA20 build, I'm talking excepting a higher rpm long term,......absolutely wouldn't do it, even short term. BTW thats my FA20 completely torn down on the table.
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cf6mech and all have good points:
Fact: Car companies spend millions to certify and test a motor. No one is tuning my FI car to be used at 8500 rpms redline. vendors at this point all have limited experience.
Opinion: Look, I have no doubt that Visconti Tuning Inc can tune a car using Ecutek safely to make more power within the band. Why the need to try and make a dyno show VE at 8000+? We all have different goals, so lets just leave it as some prefer to exceed redline and thats fine.
e85 goals: I do sincerely respect this flex fuel technology, seriously, and its helped me put my alt. fuel goals in perspective(purely for fun and with very limited use intentions),also lets me look more objectively at my build goals overall.
Challenge: Putting whats good for the vendors vs whats good for my car in perspective. I dont fear e85, I do have some concern with the cavalier power first mentality myself.
You hit the nail in the head tho, I'm wary of anyone who tells me its good to go.
I was both relieved and happy that Vortechs engineers are in agreement with my conservatism, and focused on making power WITHIN the factory power band rather than try and show what can be done above 7400 so early on. They took explicit permission and told me we'd be testing past redline tho, so its not like it hasnt been tested out on my car.
Quote:
Originally Posted by cf6mech
All e85 here, all done without Visconti (nothing against Jon but there is a cadre of tuners out there less vocal and stay off of forums), staying below 7400 and nearing 400whp, I too am looking at reliability long term,.....hence forged pistons and rods,....so I'm more than out of the box, more so than 99% of the guys going fI on this engine and I doubt very few have seen the internals of these heads as my engine builder has, and I just happened to be there at the time. He likes safe, so do I. Anything above design limits was a no go with him , and he showed me why (as that was a goal of mine),...not anymore!....so choose your own poison.  |