1.8 isn't good enough You should try around 6000 with a slight slip into drop and that should carry you past a bog. I don't look at my tach, I kind of just feel it, but that's about where I launch I think. You should be looking for 1.75 or better...

 

I'm not questioning your shifting as you obviously know what you are doing, but if you shift earlier, doesn't that effect the power band of the next gear? Not by much I'm sure, but still, you make more power at 5.5K than 5K. In other words, if you shift at 7,800, in the next gear won't you already be more in the power band than you would be if you shifted at 7,200? Another way of putting it: if you shift lower, aren't you losing out of some power in the next gear? I really don't know much about drag racing so I'm just curious as to which is the better strategy.

 

One more: Warrtalon gave what I consider the best advice - Ignore the other car. If you think about the other guy, most "track rookies" get too excited and blow the launch until you've got it down automatic. If your car is faster, you'll win anyway. My first times at the track, we were only running one side. It sucked to not be able to race someone, but it gave me lots of practice to get my technique down.

 

I don't think it's as much as what RMP's to be in but where your boosting, When I launch my car I rev release rev release and then feather my clutch. I'll see how well that method works at the shootout tomorrow

 

it feels like the car is still pulling hard up to 7800 but i dont have a dyno graph to prove the *** dyno correct or not ,but if it felt like it fell off i wouldnt rev it thru it ,

 

Thegame, you're right on the money, but let me clarify. The explanation you gave is EXACTLY what I say to people who claim that it's best to shift at 6800-7000 (i.e., Mr. Banned Plokivos). If you shift too early, you put yourself in a non-optimum spot in the next gear. If you shift too late, then you waste too much time blowing hot air at decreased power levels. Yeah, you hit the next gear right in the sweet spot, but you have already lost precious time trying to rev it out to 7800 or whatever. So, the key is finding the perfect shift point at which you are still making good power, but that also allows you to hit the sweet spot of the next gear. I've found that to be higher than 7000, but lower than 7500, so I normally just advise 7200-7300. I HONESTLY don't know _exactly_ when I shift, because I don't have time to watch the tach. My 1st and 2nd gears run out so fast, I don't even have time to look at my boost gauge. Even 3rd goes by so fast that if I try to focus on the boost gauge, I sometimes end up hitting the rev limiter before I shift. I did this on my one run at MIR when I hit 89.52mph in the 1/8th (best ever by a full mph), but I didn't get a chance to make a 2nd attempt...

Steelcity, your car probably does pull to 7800, but if you put it on a dyno, you'd see how it starts to sharply lose hp AND tq, because you don't have cams, and your turbo is not efficient above 7000rpm (nor is mine). Until you get cams, go back and learn to launch (5500-6000rpm with a feather/slip) and shift at 7200-7300. With a 1.7x 60' and good shifting, I expect 12.8s.

 

Great advice. I know some people like to get on you, but I know many other people (including myself) apprectiate your advice.

 

good advice wartalon i will try the lower rpm shifting next time and see where im at and also try about a 6000 rpm launch i already do the slip thing so im on that, quick ? a little off topic but how much more boost can i run mixing in 4gallons of 100 octane and a 1/4 tank of 94, i am peaking boost at 1.68 bar and dropping slightly???

 

Whoa, you did these runs with a mix of race gas while running nearly 25psi? If so, then we need to start over, because I thought this was just a straight 93oct run. On a race gas mix, I was hitting 111mph with a cat-back, but I wasn't using that as a reference, since I thought you were on pump.

When I ran a 50/50 mix of 104/93, I was peaking and holding at 22psi (~1.5bar) in 4th with a natural taper in the higher rpms. I won't be running 1.6-1.7 bar until tomorrow when I throw in 116oct now that I have a full, catless exhaust. I wouldn't run anymore boost than what you already said, because that's quite high...it's at the max efficiency of this turbo, AND you aren't tuned for it. I would not run race gas with increased boost on a regular pump gas custom tune unless I had an S-AFC (or other similar advice) to fine-tune...

 

Thanks. My inbox has been filling up with requests for advice on all sorts of things ranging from mods to racing to launching technique, so I guess some people are able to look past the clutter. Eventually, I hope to learn to be somewhat personable while also being somewhat knowledgeable similar to MalibuJack, but to a lesser degree. Until then, people can suck it up and listen or ignore me.

 

no wartalon my runs were on 94 octane and just peak boost hitting 1.68 and falling on taper after that, i was just wonderin how much boost i could run with a 100 and 94 octane mix

 

You know, they are making doctors take bedside manners courses.

Excellent knowledge and advice! I think I'm jumping on the Warrtalon fan bandwagon.

 

Whoa, nellie, well that opens up a new can of worms.

1) You should not peak any higher than 22psi on a daily basis on pump gas, so turn that crap down. Did you get custom tuned with the boost turned up this high? When I had my boost peaking at 22psi on pump gas at the track, my timing was being pulled like a ***** in 4th gear above 6000rpm. I had almost no power down the back side. You made 21.5mph on the backside, which isn't bad, but you shouldn't have your boost turned up to 25psi by any means.

2) If and when you mix in some 100oct, then would not only NOT go higher than you are currently, but I would recommend going lower. I would shoot for somewhere between 1.5-1.6 bar on the race gas mix. If you run 1.6bar, that will still be more than I ran when I hit 12.2 at 110-111.

 

by the way my car is setup the same as it was for my street tune by dynoflash, al set the car up boost , fuel , everything , no detonation knock nothing , it spikes to 1.68 im not saying that it stays there i do believe it is more like 1.5 after and thru out

 

Then I will defer to Al. I know my car can't run more than 21psi in this heat without knock, but everyone always claims "no detonation or knocking" while running insane boost on pump gas without anything to show for it at the track. Al knows what he's doing. I don't see how in the world you could be set up for a 25psi spike on pump gas when I only spike to 22 without knock, but if that's what he did, then I digress...