Stage_3
Well-Known Member
I agree.That 138 mph trap speed is much higher than any run on a Roush cal that I have seen.
But, he was using a race gas too, I believe.
I agree.That 138 mph trap speed is much higher than any run on a Roush cal that I have seen.
Catless headers are good for about 60whp. That trap speed is pretty incredible though.I wonder how much the headers helped Brenspeed, considering they kept the Roush cal. The headers and losing the cats must have helped considering that 138 mph trap speed. That is pretty incredible.
I know headers are worth some HP but I thought you had to tune for them.Catless headers are good for about 60whp. That trap speed is pretty incredible though.
You definitely don't have to tune for them although a tune would help maximize that setup. I personally was at a dyno with the same guy who picked up almost 90whp from catless headers and a full catback system. Same dyno but different days I'm sure the weather played a role in it but I was there for both days. It was about a month apart and in the summer last year. Still running on the roush tune with no issues.I know headers are worth some HP but I thought you had to tune for them.
500, or 5000 posts ago, Or another thread ago, it was revealed that the Roush tune does NOT compensate for octane like the stock ford tune.. It doesn't do much above 93 octane.. Ford tune goes up to 96 or something... Don't shoot me if I'm off by a few decimals but...I agree.
But, he was using a race gas too, I believe.
Yeah 97 according to Boostane. On stage 1 I asked Roush and they said no that it didn’t but I’m not sure they know what their own tune does.500, or 5000 posts ago, Or another thread ago, it was revealed that the Roush tune does NOT compensate for octane like the stock ford tune.. It doesn't do much above 93 octane.. Ford tune goes up to 96 or something... Don't shoot me if I'm off by a few decimals but...
I called it incredible.....but I was thinking unbelievable.I'm honestly calling BS on this one.. Not sure the angle that's being played but 138mph? No..
<puts on flame retardant suit>
What about with boostane mixed to say 103 (random) octane? Any benefit? Also what is your opinion on the catless headers with the Roush cal?The roush cal commands 18-19 deg spark at wot, depending on exact load. It will add up to 3 deg if no knock is sensed, but has a hard limit at 21.5. If you’ve ever logged a supercharged gen3 on 91-93, you know that pump gas won’t get you anywhere near 21.5 deg. Fwiw this limit is set much higher than whipples.
When my 2018 car was stock I was able to hit the timing max on just 93, so it wouldn’t benefit from more octane.
I wouldn’t get too hung up on OAR being active. OAR just gets the starting point closer to the knock limit when you change loads or speeds. It still advances until it sees knock, backs off, then advances again with oar on or off.
To get to 21.5 would require a pretty strong dose of Boostane. Ms109 would probably get it there. No way 93 alone is getting there. That’s e85 numbers.So, Mike, to boil it down, for the Roush cal to advance to 21.5, a mix of boostane or 109 is probably needed? Unlikely to advance that far on just high quality 93?
More octane will definitely benefit your roush phase 2, up to about 100. Beyond that, you’re just paying for safety.What about with boostane mixed to say 103 (random) octane? Any benefit? Also what is your opinion on the catless headers with the Roush cal?
I'm with you.I'm honestly calling BS on this one.. Not sure the angle that's being played but 138mph? No..
<puts on flame retardant suit>
138mph with just headers on the Roush tune is beating almost anything I have seen from PBD or VMP.I'm with you.
Is the Roush calibration compensating for the way higher octane?? I always thought it wouldn't.
Something seems fishy here.