Analyze this timeslip
02-08-03, 01:01 AM
#26
The Spirit of FLUFF!
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See, I'm not throwing crazy **** out there, but it can even be done with a stock cluth.....I wouldn't recomend doing it more than once. But getting a stage 2 or higher clutch, with light mods a stage 2 will do just fine, is one of the best launch improvements you can make, along with getting a better LSD.
02-10-03, 12:06 PM
#29
Originally posted by HeatTreated
And everyone is shifting at 7k rpms?
since power drops off at that time.
And did I read that TurboJeff is getting 2ndary boost in first gear? I sure dont.
And everyone is shifting at 7k rpms?
since power drops off at that time.
And did I read that TurboJeff is getting 2ndary boost in first gear? I sure dont.
Jeff
02-10-03, 05:23 PM
#33
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thats crazy. I always figured it was supposed to be Primary Turbo only in 1st gear with stock ECU, cuz I have hard enough time with traction in 1st anyways. Can anyone else touch on this 1-2 thing to check out?
02-10-03, 06:30 PM
#34
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I don't really get much boost in 1st gear either. Every other gear I do, but not 1st. Maybe because it goes by so fast, but I never really see more than a few PSI in 1st. Like, 2-5psi max.
02-10-03, 07:04 PM
#35
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Here just so heat treated may read my previous post if he hasn't read this. In order to get rid of your traction problems in 1st gear and improving your launch, read up! 
If you get a stage 2 or 3 clutch and a upgraded LSD you'll definately improve your launch by doing what is written below.....happy boostin
If you get a stage 2 or 3 clutch and a upgraded LSD you'll definately improve your launch by doing what is written below.....happy boostin
Originally posted by RX7SpiritR
Wanna know the best way to launch? Rev it up to about 5k RPM's and then let the clutch out but your only half peddling it when you let it out, once you start going floor it! Now if you do this right you wont burn out at all and you wont get wheel hop and you'll be well on your way to having extremely fast runs along with launch improvements of your own.
EDIT:I was just looking over everything else and noticed EVERYONE is only launching at about 3k RPM's........ why? You should be launching at around 5k RPM's like I said. You have to get the turbo's spoolin really good so when you take off you really take off, that's what the LSD was made for. It takes a lot of practice to get it just right at those RPM's, but it's very worth it when you look at your times afterwards. You may not get it just right every single time, but you'll have other runs you can do. At least try it out some before you start yelling at me for some reason, not sure why you would but thses are just my suggestions to you as I'm trying to help you on your launch, you don't have to take my advice. Have fun practicing and good luck on improving your times.
Wanna know the best way to launch? Rev it up to about 5k RPM's and then let the clutch out but your only half peddling it when you let it out, once you start going floor it! Now if you do this right you wont burn out at all and you wont get wheel hop and you'll be well on your way to having extremely fast runs along with launch improvements of your own.
EDIT:I was just looking over everything else and noticed EVERYONE is only launching at about 3k RPM's........ why? You should be launching at around 5k RPM's like I said. You have to get the turbo's spoolin really good so when you take off you really take off, that's what the LSD was made for. It takes a lot of practice to get it just right at those RPM's, but it's very worth it when you look at your times afterwards. You may not get it just right every single time, but you'll have other runs you can do. At least try it out some before you start yelling at me for some reason, not sure why you would but thses are just my suggestions to you as I'm trying to help you on your launch, you don't have to take my advice. Have fun practicing and good luck on improving your times.
02-10-03, 07:07 PM
#36
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There is something wrong then cause you should be getting 10 psi.....here's how the pattern should be on stock twins and stock boost: 1k to 3k rpms should be 10 psi 3k to 4500 rpms should be 8psi for cross over and then from 4500 to redline should be 10 psi. So if I were you I would check into this and see if maybe there is a problem, boost leak maybe or somthing. Good luck.
Originally posted by mr_ouija
I don't really get much boost in 1st gear either. Every other gear I do, but not 1st. Maybe because it goes by so fast, but I never really see more than a few PSI in 1st. Like, 2-5psi max.
I don't really get much boost in 1st gear either. Every other gear I do, but not 1st. Maybe because it goes by so fast, but I never really see more than a few PSI in 1st. Like, 2-5psi max.
02-10-03, 07:45 PM
#37
thanks for rephrasing what I said
I bet it helped him a lot since you explained it nicely
there is a problem for sure if you aren't getting boost in first gear. How can you have problems with just a few psi in first gear a lot of people run 15 psi at the track on street tires?
I bet it helped him a lot since you explained it nicely
there is a problem for sure if you aren't getting boost in first gear. How can you have problems with just a few psi in first gear a lot of people run 15 psi at the track on street tires?
02-10-03, 07:58 PM
#38
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oops, sorry snook.....I didn't read your posts carefully my bad.
my bad.
Originally posted by Snook
thanks for rephrasing what I said
I bet it helped him a lot since you explained it nicely
there is a problem for sure if you aren't getting boost in first gear. How can you have problems with just a few psi in first gear a lot of people run 15 psi at the track on street tires?
thanks for rephrasing what I said
I bet it helped him a lot since you explained it nicely
there is a problem for sure if you aren't getting boost in first gear. How can you have problems with just a few psi in first gear a lot of people run 15 psi at the track on street tires?
02-10-03, 09:03 PM
#39
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I get boost in 1st gear, just not 10psi...
Also, my boost pattern (when my car was last running) was 10-5-7. I didn't really get a good reading since the last time I really checked it out was at the track. I pulled a 14.11 @ 99.5 with the 10-5-7 pattern.
I'll be getting her back on the road, and probably buying a mityvac & compression tester to start troubleshooting the boost (mityvac) and to settle my worries (Compression tester)
Also, my boost pattern (when my car was last running) was 10-5-7. I didn't really get a good reading since the last time I really checked it out was at the track. I pulled a 14.11 @ 99.5 with the 10-5-7 pattern.
I'll be getting her back on the road, and probably buying a mityvac & compression tester to start troubleshooting the boost (mityvac) and to settle my worries (Compression tester)
02-10-03, 11:01 PM
#40
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Originally posted by turbojeff
It's all in the launch. I ran a 13.954@99.45 mph on my very first pass ever with my FD with a passenger, outside temps were in the 75-85F range (don't really remember).
The next two runs without the passenger were 14.2 and 14.1.
A year later I took my now DP, Efini y-pipe and cat-back wearing FD to the same strip. First pass was a 13.97@100mph
. A few runs later I slipped the clutch just slightly more out of the hole and turned a 13.58@102.85mph.
What I'm trying to point out is not what the fastest time someone ever turned with XXX mods, but what a difference just slight changes in launching made.
Jeff
It's all in the launch. I ran a 13.954@99.45 mph on my very first pass ever with my FD with a passenger, outside temps were in the 75-85F range (don't really remember).
The next two runs without the passenger were 14.2 and 14.1.
A year later I took my now DP, Efini y-pipe and cat-back wearing FD to the same strip. First pass was a 13.97@100mph
. A few runs later I slipped the clutch just slightly more out of the hole and turned a 13.58@102.85mph.What I'm trying to point out is not what the fastest time someone ever turned with XXX mods, but what a difference just slight changes in launching made.
Jeff
Sequential turbo launhes are a bit strange. You don't want too much rpm, because you will go into the secondary mode, but you also don't want too little rpm or you will simply bog.
I believe the best rpm is just under 4200 rpm. If you let out the clutch slowly and floor it at the same time, you can pretty much slip the engine just enough to pull hard, but stay in primary mode until you gain traction.
02-10-03, 11:43 PM
#41
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Only problem with this is you'll still lose traction. Like I said what you want to do is half peddle it or give it enough gas just to keep the RPM range between 4 and 5k RPM's and then when the last amber light hits let the clutch out all the way while you are still half peddling it then once your going floor it right away and again, if you do this right you will have a damn near perfect launch with little or no traction loss depending on your tires, LSD, and clutch. a kaaz LSD, slicks, and a stage 2 or 3 clutch will get you extremely fast launches using this technique!
Originally posted by spooledUP7
You hit the nail square on the head. Launching is critical to ET. Anyone can MPH what you did, but low 60' will get you the golded numbers.
Sequential turbo launhes are a bit strange. You don't want too much rpm, because you will go into the secondary mode, but you also don't want too little rpm or you will simply bog.
I believe the best rpm is just under 4200 rpm. If you let out the clutch slowly and floor it at the same time, you can pretty much slip the engine just enough to pull hard, but stay in primary mode until you gain traction.
You hit the nail square on the head. Launching is critical to ET. Anyone can MPH what you did, but low 60' will get you the golded numbers.
Sequential turbo launhes are a bit strange. You don't want too much rpm, because you will go into the secondary mode, but you also don't want too little rpm or you will simply bog.
I believe the best rpm is just under 4200 rpm. If you let out the clutch slowly and floor it at the same time, you can pretty much slip the engine just enough to pull hard, but stay in primary mode until you gain traction.
02-17-03, 07:04 PM
#42
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my best time was a 13.5 @ 101mph shufting at 7500 rpm so i can stay in the max power range of the engine in the next gear! my 60' on that run was a 1.9 on street tires!
02-17-03, 08:32 PM
#43
My only time out in my fd before it got into an accident was 13.2 @ 108 60ft was 2.3. I just bought the car a few weeks ago and i only had one run. I had full exhaust intake and pfc running 12 psi i think. My friend with a bone stock fd with just a dp ran 13.8 at 100 mph. You have to slip the clutch to get a good 60ft, but you have to punch it at the right time, too soon and you spin your tires, too late and you burn something out.i've never realy perfected the technique, my 60ft is usually 2.0. The act street disc holds up pretty well to this type of abuse.
02-18-03, 09:12 AM
#44
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my 93 rx ran a 13.6 at 109 mph. and that was rolling on a set of 18 inch adr wheels. other modifications at the time were apexi intake system, and the racing beat cat-back exhaust. i was launching at just over 4 grand. since than other modifications consist of sr motorsports intercooler, lowered suspension by 2 inches. apexi blow-offs, apexi digital fuel controller and boost controler. i also picked up a set of 8.5 m/t drag slicks. hopefully at moderate boost levels i will be hitting low 12's.
02-18-03, 09:31 AM
#45
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Well, I checked my 1-2 tranny clip. Everything looks ok there.
And do clarify somethings. My boost pattern in every gear but first is the 10-8-10. but in 1st gear, I only get 10psi Primary boost and then it drops off to like 3psi. Only in this gear.
Im gonna take you guys advise and try a launch of about 4500rpms and slip the clutch a bit more off the line. Thanks alot for the advice.
And do clarify somethings. My boost pattern in every gear but first is the 10-8-10. but in 1st gear, I only get 10psi Primary boost and then it drops off to like 3psi. Only in this gear.
Im gonna take you guys advise and try a launch of about 4500rpms and slip the clutch a bit more off the line. Thanks alot for the advice.
04-06-06, 12:39 PM
#48
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Originally Posted by the_glass_man
Damn Eric, bring out the dead why don't ya? lol
You're really pushing for the drag queen specific section aren't you?
You're really pushing for the drag queen specific section aren't you?
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