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Drag Racing Discuss Drag Racing here be it dirt or tarmac. Sponsored by Sydney Dragway. |
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#1 | ||
Donating Member
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Posts: 5,304
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Hi Guys,
Very disappointed last night to run only a 14.100 at best last night. I just could not get traction off the line. I guess running 20's werent the best idea! Anyway, what do you guys think of the following modifications to allow for a better time? (I want to try again next Wednesday and dont think I can put in more in a week). SS Induction Kit (currently have a pod, nothing else) 3.7 diff 16" wheels Would these 3 simple mods help? I'm not gonna hunt for more HP till I figure out how to launch what I have. I have a 250hp NOS kit, but its all useless till I get off the line better. 2.4 60' is hopeless. This was the first time with the car. I've always run the bike, which is good for a 10.8, but I want to get this car up and going. Also, launching it at 3400 rpm. Do you think it too high? (I'm a little clueless here, so please be gentle. I've only circuit raced before) Any suggestions? Or should I just bite the bullet and strap on a Kenne Bell? Thanks guys. kypez.
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#2 | ||
Racing improves the breed
Join Date: Apr 2006
Location: SE Melbourne
Posts: 3,981
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Those 20's are definitely killing your 60' foot time, 3,400rpm might be a little too much off the line for a manual, was it wheelspinning much? If you get your 60' time down there is a better ET there for sure!
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#3 | |||
Back to Le Frenchy
Join Date: Feb 2005
Location: Back home.....
Posts: 13,346
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Don't get an SS intake, go straight for a BPR airbox.
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#4 | |||
Racing improves the breed
Join Date: Apr 2006
Location: SE Melbourne
Posts: 3,981
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Quote:
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#5 | ||
N/A all the way
Join Date: Apr 2008
Location: Melbourne
Posts: 3,459
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3500 is fine, but dont dump the clutch.
I rev to 4500 on street tyres, 5500 on MT's and release half clutch, then as revs and speed equalise let the rest out. 1.7 60ft on streets and 1.6 on Mickey Thompsons. If you are after a quicker strip time - 275 17 inch MT streets are the best bang for buck. I am with the others on the cold air, go with BPR, a bigger air cleaner and great flow.
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BA GT 5.88 litres of Modular Boss Powered Muscle 300++ RWKW N/A on 98 octane on any dyno, happy or sad, on any day, with any operator you choose - 12.39@115.5 full weight |
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#6 | |||
N/A BOSS 390+
Join Date: Jan 2005
Posts: 3,648
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![]() ![]() FPV GT 03 /341 RWKW OF N/A POWER. XB GT 73 /OLD FORD MUSCLE ALL AUSSIE MUSCLE |
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#7 | ||
OzEcruisers PRESIDENT
![]() Join Date: Mar 2005
Location: Melbz
Posts: 15,761
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Yes you have 20"s but what type of tyre, is it a cheapy or a name brand?
Did you drop the tyre pressure? Did you smoke them up big time for the burn out? The hotter the tyre, the stickier it is ![]() Your 60 foot is really really bad, my lowest is 2.23 and that's still bad. I would only be looking at tyres as your car is obviously good for 13's - you just got to get some grip ![]()
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1994 Ford Fairmont EF NA 6cyl Man 3.9 diff Sedan PROEF 13.46 @ 105.78mph Tuned by DYNOMOTIVE 200BUX - AFF Drag Nats 2019 EF Wagon
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#8 | |||
3..2..1..
Join Date: Nov 2009
Location: Bellbird park
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#9 | |||
Starter Motor
Join Date: Jul 2008
Location: Sydney
Posts: 18
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Quote:
Dropping the pressures of a 20' tyre aint gonna achieve anything coz its got a 35 profile (virtually solid sidewall) as opposed to a 60 series tyre. The bigger the burnout on a street tyre (drag radials excluded) the slipperier they will get. It just sounds like all you need is a bit more time practicing your launch. |
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#10 | |||
Donating Member
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Quote:
I'll check out this BPR box. I've redone my front end so if I can get a box at the right angle, there is plenty of Air coming in. I have 275 20's, maybe a smaller Rim will help. Thanks guys. I'm going to see what MT's I can get, though I'll have to fit a tail shaft loop to run slicks. Tweeked, thats massive 5500 for the launch. Those MT's must be really sticky!!
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#11 | ||
Solution Was Boost 4?, 6 & 8
Join Date: Dec 2004
Location: Melbourne
Posts: 23,624
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For the mods you have and being a manual 2003 Boss 260 your time isn't to bad, at our last meet I seen FG XR8 and a FG GS both running 14.2's and they were auto's..
Best time I had with all bolt-ons 2003 xr8 ute with unichip was 13.5.
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#12 | ||
spoolin!
Join Date: Jul 2006
Location: on Boost!
Posts: 1,620
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I did a 13.51 in my ute.
4.11 diff gears tune 18" race slicks [265/35] (not drag slicks) and a standard are box. I launched at 3500rpm and slipped the clutch away from the line. I was doing 2.0 60' times, but crossed the line at 106mph. Trying to get a 2 tonne ute off the line is hard for me. I did a 13.863 on 19" 275/30 street tyres at 99mph with a 2.2 60' and then another 13.863 @102mph with a 60' of 1.9 with 18" 245/40 streets. One thing i am good at is being consistantly inconsistant.
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#13 | ||
spoolin!
Join Date: Jul 2006
Location: on Boost!
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to run full slicks you'll need front runners too. which you wont fit over the brembos.
just try some ET street radials and make sure you get some heat into them. otherwise they'll just spin off the line.
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#14 | |||
Donating Member
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Quote:
I think its the wheels. Have you done anything more to your car mate? I see you have it tuned by intune. They did my XR8 as well, (ie, exhaust and clutch and tune). But you're a good .6 of a second quicker.
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#15 | |||
spoolin!
Join Date: Jul 2006
Location: on Boost!
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Quote:
Underdriven 25% 4.11 Mal Wood Clutch 2.5" exhaust with cats and headers BMC air filter with standard induction set up Runs approx. 240-245rwkw Lightened (removed hardlid and spare wheel) it a bit to get the time down but am still pushing the scales at around 1900kg.
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#16 | ||
N/A all the way
Join Date: Apr 2008
Location: Melbourne
Posts: 3,459
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Mickey Thompson streets with a good burnout can hold most launches at 250rwkw, as long as you dont dump the clutch.
http://www.youtube.com/watch?v=A3nYAmrmIF0
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BA GT 5.88 litres of Modular Boss Powered Muscle 300++ RWKW N/A on 98 octane on any dyno, happy or sad, on any day, with any operator you choose - 12.39@115.5 full weight Last edited by tweeked; 22-07-2010 at 04:38 PM. |
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#17 | ||
FF.Com.Au Hardcore
Join Date: Sep 2006
Location: w.a
Posts: 1,128
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not too bad a time
but i would expect mid thirteens from a manual with your mods and a good launch.. my ba xr8 with cai 4.10 gears headers only & tune (245rwkw) went 13.006 and consistent 13 flats on street tyres with a 2.1-2.2 60' 4sp autos are much easier though your mph is a little low also those 20' wheels dont help even the weight of them slows you down a heap let alone getting the power to the ground
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#18 | |||
FF.Com.Au Hardcore
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Quote:
What was your trap speed? |
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#19 | |||
Donating Member
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Quote:
164.77kms/hr
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#20 | |||
GT
Join Date: Apr 2005
Location: SYDNEY
Posts: 9,205
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Quote:
to put this in perspective . 14.1 sec over 400m is faster than A GTHO PH3 @14.4 . THE AU 220 MKIII MATCHED IT AT 14.4 . SO THE BA BEING THE NEXT MODEL DOING 14.1 . IS PRETTY GOOD CONSIDERING YOU" HAD TRACTION PROBLEMS . |
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#21 | |||
Lucky, lucky bastard!
Join Date: May 2007
Location: Sydney, NSW
Posts: 1,321
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Quote:
What perspective are you referring to? GTHO PH3 was built in 1971 almost 40 years ago. 30 years later the AUIII only matches the GTHO and nearly 40 years later the BA just barely pips it at the post? No perspective to be gained there. Even then, his car isn't stock so the comparison is pointless. According to his sig and the thread he is running a Flash Tune, Herrod Lowering Springs and Chip, Full stainless exhaust and headers, ceramic hipo clutch and NOS (though the NOS wasnt used). Sorry, but i agree entirely with the OP. I would be pretty disappointed too with the result. But there is some good advice in this thread, and with a few small configuration changes and some technique changes, we should see the times come down. Hopefully we will get a good update if the OP goes down tomorrow night. Keep at it mate, practice makes perfect!
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#22 | |||
FF.Com.Au Hardcore
Join Date: Jun 2005
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#23 | ||
Hmmmmm Mulberry....
Join Date: May 2005
Location: Mornington Peninsula
Posts: 1,438
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Time sounds about right. Seen plenty of XR8's and GT's run 14.00's
These sort of cars are quick on the street, but on the track, 14.00 is about normal. Plenty of HSV's running 14.00 as well. Dont be to stressed about it. Smaller diam tyres will help in acceleration, but without the right tyres, it will all go up in wheel spin. |
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#24 | ||
FF.Com.Au Hardcore
Join Date: Jan 2005
Posts: 2,728
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14.1 thats a pretty good time with traction loss!
![]() I've seen B Series GTs run same time, but just with a improved 60 foot alone your looking at least a 13.9 which is fantastic for one of those chunky suckers. B Series Bosses, will be looking at owning one in the near future, i reckon theyre great! ![]()
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#25 | ||
FF.Com.Au Hardcore
Join Date: Sep 2006
Location: TAS
Posts: 2,551
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As with above - don't be upset with a 14.1 I usually run 14.0 flat in my standard BA GTP manual. You need a lot less revs on launch. Start with 2,000rpm then work your way up in 100rpm increments. I can usually only go 1,800 before wheelspin takes over with stocky tyres.
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#26 | ||
BOSS 5.4L Enthusiast
Join Date: Aug 2005
Posts: 21,904
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My XR8 with CAI & Exhaust went 14.0 on 18's i wouldn't stress too much it's always going to be a struggle with street tyres.
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#27 | ||
Donating Member
![]() Join Date: Jan 2005
Posts: 5,304
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Thanks for the replies guys. I'm running pretty crappy Nitto's on the rear. I was running 30.5 psi when I did the time. Its just annoying as I know if I can get it off the line right, it really opens up. I think I almost run out of third at 165 ish, maybe a shift to 4th might have pushed it back to the power band (another thought).
I did do a good burnout but as mentioned, I knew with street tyres, too much will increase the pressure too much and be a waste. Streety's are designed to heat quickly. dan b, I am in Sydney. I was going to come down next wednesday night and try again, with different tyres/wheels. 17's with some decent compound would do the trick I think. I have some old 16's around here, but I think that might end in wheel spin. I have a short throw shifter that worked a treat too. I might add that I didnt use the NOS kit in any of these runs. I was thinking of hooking it up, but I think I'm going to try tyres first!
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#28 | ||
spoolin!
Join Date: Jul 2006
Location: on Boost!
Posts: 1,620
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Save the giggle gas... go out and achieve a good time without it. But most of all have fun.
Practice makes perfect... the only person you should set out to beat is yourself. No one else. Everytime i go out, it is to beat my previous PB if I can. And have some fun battles during the process.
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#29 | |||
Donating Member
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Quote:
The NOS was a kit from my old car that I kept. I havent used it for the simple reason I want to get the most out of the car first. I just want to figure what to do to get it moving or to "make up" for the loss in first (ie, diff ratio)
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#30 | ||
You dig, we stick!
Join Date: Mar 2006
Posts: 7,461
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I personally wouldn't add more power until I figured out the best launch technique (if the aim of it all was to get a better time over the 1/4).
kypez, get a proper 60' time and a low 13 is yours. When I say proper I mean what the car is actually capable of, like 2.0, or 1.9. No more power required.
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