Jump to content
SAU Community

9 Second Gtst In The Uk

ahapartridge
 Share

Recommended Posts

ahapartridge Explorer

ahapartridge

Posted
Posted

It may well have been posted on this forum already but if not I just wanted to share the news from the UK.

At Santa Pod yesterday (25/6) John Bradhaw in 'Project GTST' ran a 9.9 backed up by a 10.02

This car has undergone major work over the last few months by Gary Passingham at GT-Art and is still only in the shakedown stages at the moment

You can find lot more information about the car at www.projectgtst.com but the basics are that it is a R33 GTST using a bored/stroked RB25 and running a T51SPL

Still to come on the car is an Xtrac gearbox (standard box was used yesterday :D ) , the NOS has not been used yet either and the suspension still has a lot of development work to be done too

Link to comment
https://www.sau.com.au/forums/topic/123873-9-second-gtst-in-the-uk/
Share on other sites
2rismo Grand Master

2rismo

Posted
Posted

Just a couple of things.

First, AWESOME work by the projectgtst guys! Car looks and sounds sensational.

Second, Slicks on the back and radial fronts @ 140mph?!?!?!

Lastly, It's not yet the WORLD'S fastest gtst but its getting there quickly.

Well done.

Adrian

2rismo Grand Master

2rismo

Posted
Posted

From www.projectgtst.com

After much searching I finally managed to find the following information on Drag GTST's.

A) The best 1/4 mile time to date worldwide for the RB25 GTST was achieved by Ryan Quinn from Victoria, Australia. Ryan ran at Calder Park and managed a 1/4 mile of 10.12 secs @ 136.3 MPH !!!

B) The best time worldwide for a GTST regardless of engine spec was achieved by a fellow Australian, Brett Whitbread using a RB26/30. Brett ran at Willow Bank and got a 9.464 sec run @ 150.9 MPH !!!

Adrian

ahapartridge Explorer

ahapartridge

Posted
  • Author
Posted
Just a couple of things.

First, AWESOME work by the projectgtst guys! Car looks and sounds sensational.

Second, Slicks on the back and radial fronts @ 140mph?!?!?!

Lastly, It's not yet the WORLD'S fastest gtst but its getting there quickly.

Well done.

Adrian

Keeping the RB25 was a very important part of the project, as is keeping the original rear suspension layout rather than going for a tubbed rear end like a couple of the quick RWD cars have opted to over here.

2rismo Grand Master

2rismo

Posted
Posted

I will have to confirm but I don't believe the 9 sec GTS i listed was tubbed at all - I think it ran on a 10.5" tyre.

Can you tell me the reason for radial fronts and crossply slick rears? Looks dangerous to me - or am I missing something?

Adrian

ahapartridge Explorer

ahapartridge

Posted
  • Author
Posted
I will have to confirm but I don't believe the 9 sec GTS i listed was tubbed at all - I think it ran on a 10.5" tyre.

Can you tell me the reason for radial fronts and crossply slick rears? Looks dangerous to me - or am I missing something?

Adrian

I don't know why John ran that tyre combination, he will be the first to admit that he is a complete novice when it comes to drag racing.

Can you tell us the reason why it is a bad idea to run the radials on the front? I assume the comparative lack of grip compared to a slick should you need to correct it mid strip is the issue?

MrBlonde Community Regular

MrBlonde

Posted
Posted
How good was that.Big turbo.I diddnt think that it was capable of 9s on a 25det.

Doesnt bu5ter run the same in his but with a 3l block 26 head.Though he is in full steet trim.

Brett's hotside is rated at 85 bhp, not 1,000 bhp like the big boy trim.

2rismo Grand Master

2rismo

Posted
Posted
I don't know why John ran that tyre combination, he will be the first to admit that he is a complete novice when it comes to drag racing.

Can you tell us the reason why it is a bad idea to run the radials on the front? I assume the comparative lack of grip compared to a slick should you need to correct it mid strip is the issue?

Crossply tyres 'wander' as you accelerate down the track and radial tyres don't. What you find is that the back starts to sway as you get faster and faster while the radial tyres on the front track straight and true for the duration of the run.

You end up with an ever-increasing pendulum effect that can end in disaster. Please make sure John buys some crossply front-runners before racing again. Ask him if he noticed any swaying in the deep end that he had to correct.

Over here our regs state that if your cr is quicker than 12.50 and you run crossply (slicks) on the rear, you MUST have crossply fronts.

Brett's T51R is the KAI variant and is rated at 850hp not 1000hp like the SPL in this gtst.

Adrian

ahapartridge Explorer

ahapartridge

Posted
  • Author
Posted
Crossply tyres 'wander' as you accelerate down the track and radial tyres don't. What you find is that the back starts to sway as you get faster and faster while the radial tyres on the front track straight and true for the duration of the run.

You end up with an ever-increasing pendulum effect that can end in disaster. Please make sure John buys some crossply front-runners before racing again. Ask him if he noticed any swaying in the deep end that he had to correct.

Over here our regs state that if your cr is quicker than 12.50 and you run crossply (slicks) on the rear, you MUST have crossply fronts.

Brett's T51R is the KAI variant and is rated at 850hp not 1000hp like the SPL in this gtst.

Adrian

Cheers for that Adrian

I think the 'tubbed' issue I mentioned was maybe taken the wrong way, what I meant was a couple of the 'quick' RWD cars over here in the UK have gone for a proper drag set up on the rear end, one in particular is the CRD Supra which runs the 9's but will no longer be allowed to run in the street legal class.

The car will not run in competition again until October so we have a long wait to see how the NOS and sequential Xtrac box will improve the times

MrBlonde Community Regular

MrBlonde

Posted
Posted
the subzero cr was not tubbed, it still ran the factory rear end, then used welded up shock absorbers to keep the camber flat and used the sof side wall of the slick tyre as the suspension. it was well documented inthe zoom article.

Shane, effectively turning the IRS into a live axle.

1JZ.747 Community Regular

1JZ.747

Posted
Posted
Shane, effectively turning the IRS into a live axle.

yea thats the idea, i spoke to some suspension people about trying it, but was basically told they didnt want to aid in my hurting myself, there view on it was too dangerous, my car has fortunately worked out to sixty foot quite well so the idea is now long gone.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      R33 persistent issues. P/steering and lag/misfire

      By GTSBoy · Posted

      Power steering is probably because someone has nuked the HICAS CU and you no longer have the variable power asist doing what it is supposed to. How much boost are you running? You are aware that any more than 10 psi on the stock ECU is just asking for it to go to full R&R (that's Rich & Retard, which is effectively Retarded and Retarded!) which kills all the power. Depending on the exact conditions, it can just be runnign on the fat and stupid end of the maps, then the conditions change, you make a little more boost and the ECU goes into panic.
    • Kapr
      Freddy Plenum vs Genuine options RB25

      By Kapr · Posted

      @BuiltNotBought Just as GTSboy said.   If you want driveabilty and more low down torque..keep the stock runners. They are VERY good from a factory. I have them too on my RB25DET NEO and as a GTSboy i have fmic but with stock piping route(i have Blitz intercooler) Iam making around 320 BHP and the car pulls "hard" from like 2,5k all the way to 7k. I have it dyno tuned to mimic N/A power curve and making little less max torque due to the smallbox tranny. But driveability is very great. I had 350Nm below 3k so car feels very quick.   EDIT:  Not my channel but i saw this and i know that is what i want (and i have exactly this)  
    • MissMintyR33
      R33 persistent issues. P/steering and lag/misfire

      By MissMintyR33 · Posted

      Looking to sort out a couple of issues on my skyline  It recently was rebuilt, however rebuilder long story short did not give two flying effs about the work he did. So moving forward it's running but I have two persistent issues 1) it has a misfire / lag type of issue (was at higher RPMs but I had a dead piggy back ecu removed which improved it) now it's not as bad but still does it at random, I thought it may have been a boost issue I'm running an older turbosmart dual stage controller, turbosmart told me to try running off gate pressure however it still has a lag at random times. It has New MAF, maf plug, coil packs, sparks, CP harness.. injectors tested and cleaned. Factory ECU. 2) Power steering issue. It is tight as anything. Flushed power steering, rebuilt my pump because the bearing was shot. Flushed again still tight (mainly when parking and going slow into my driveway etc)  No kinks in hard lines, replaced the lines I could see had cracks. Still tough to steer.  I was told to shim a coin and place into the solenoid plug? Is there anything else. My steering angle sensor also has a issue. It's a used one I replaced, does it need to be calibrated? I feel like I've tried everything and this car is my voodoo doll.   
    • Dose Pipe Sutututu
      Neil's R33 Gts-t Build

      By Dose Pipe Sutututu · Posted

      Holy shit... wow!!! I totally missed this
    • MBS206
      Dose's Sometimes DIY and Pay Someone Home & Boat Improvement Thread

      By MBS206 · Posted

      One main filter. Each tank has a prefilter to keep rocks and small children out, then the big main filter that also does water separation. Clogged the first one so bad it was like a rev limiter at 3200rpm. Literally just like dropping the throttle off and maintaining rpm!
×
×
  • Create New...