FI Question about Race Gas
12-06-2010, 09:08 PM
#21
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i wasn't answering your question. I didn't even see your post. I was talking to the OP. He didn't say anything about different tunes. I can read.
anyway to you.. like stated basically its ok for you to run the 100 on your 93 map and not ok for 93 on your 100 map so i'd just get it low, put in a good bit of 100 and run it for a bit and go ahead and switch over.
ross
anyway to you.. like stated basically its ok for you to run the 100 on your 93 map and not ok for 93 on your 100 map so i'd just get it low, put in a good bit of 100 and run it for a bit and go ahead and switch over.
ross
12-07-2010, 05:45 AM
#22
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Too much timming may cause engine pinging(can damage engine) higher octane or retarding timming will help.
I don't want to touch my timing, because car is running almost to perfection. Just wanted to see if higher octane would help. My top H.P peak is long & flat. That keeps me longer at the h.p peak when shifting. Advacing my timming might give me a couple of more h.p. but at a higher rpm. & will change my H.P curve.
I don't want to touch my timing, because car is running almost to perfection. Just wanted to see if higher octane would help. My top H.P peak is long & flat. That keeps me longer at the h.p peak when shifting. Advacing my timming might give me a couple of more h.p. but at a higher rpm. & will change my H.P curve.
12-07-2010, 06:53 AM
#23
Thanks all for the input. As the post after yours sums up what I have heard, race gas is a wise choice for fuel under track conditions. Guess in the back of my mind, I am liking the idea of more power. Of course that addiction has cost alot of members in here dearly. So I will be alright with my current tune with the 100 octain. So with my second setting, would I be correct in saying that I can only have better runs with a tune dedicated to the 100? And for my primary tune staying the same with daily driving with pump?
I got a question about race gas as well...
I have a tuned map for 91 and also a tuned map for 100 race gas. Now, if my tank is full of 91 oct and I want to switch to 100 oct...and use the 100 oct map...do I just stay on the 91 oct map until my low fuel light comes on...then fill the car up...let's say 2 gallons of race gas. Then drive the car until the low fuel light comes on again, then switch to the race gas map and fill up the car with race gas and then I can put it down?
I have a tuned map for 91 and also a tuned map for 100 race gas. Now, if my tank is full of 91 oct and I want to switch to 100 oct...and use the 100 oct map...do I just stay on the 91 oct map until my low fuel light comes on...then fill the car up...let's say 2 gallons of race gas. Then drive the car until the low fuel light comes on again, then switch to the race gas map and fill up the car with race gas and then I can put it down?
dumping in race gas in won't make more power, theoretically it will make less power on the same tune/boost/ etc because there is less energy in it. So if you are going for power, leave the 93 in. For added safety under track conditions, 100 is a good idea. But i wouldnt recommend putting race gas in and turning up the boost without tuning.
Ross
Ross
You won't make more power with higher octane. Theoretically, without any other changes, you'd make slightly less power. Try a 93 vs 100 tune, then report back. Actually, try a 93, 100, and C16 or Q16 tune, then report back. The differences between them are astounding. . . when tuned correctly.
12-07-2010, 07:48 AM
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Since I have less mods than most, & just average H.P like most of us. My only advantage is understanding drag racing & perhaps driving.
When we shift to a higher gear, the rpm drops. The object of good drag times is to keep the car at the highest h.p level for the longest possible time. That's where the longer flat peak comes into play. Its better to have a 280hp at 6,500rpm to 7,500rpm, than to have 290hp@ 7,500rpm but only 260hp at 6,000rpm to 7,000rpm. That's why when I see a company advertize a 15hp increase by using their exhaust or headers @ 5,800rpm, I laugh. Long winded answer
When we shift to a higher gear, the rpm drops. The object of good drag times is to keep the car at the highest h.p level for the longest possible time. That's where the longer flat peak comes into play. Its better to have a 280hp at 6,500rpm to 7,500rpm, than to have 290hp@ 7,500rpm but only 260hp at 6,000rpm to 7,000rpm. That's why when I see a company advertize a 15hp increase by using their exhaust or headers @ 5,800rpm, I laugh. Long winded answer
Last edited by andre12031948; 12-07-2010 at 06:39 PM.
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