Author Topic: whats needed to get a gtt in to the 13's?  (Read 1346 times)

midge

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whats needed to get a gtt in to the 13's?
« on: 08:21, Mon 16 March 2009 »
as title really! what mods do you need to dip into 13's on 1/4 mile?

5teve L

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« Reply #1 on: 08:39, Mon 16 March 2009 »
Decent drag tyres is the best way, they aren't cheap at 300+ a pair though. (mickey thomson)
Strip all the bits you don't need off the car as well...

Or decent sized turbo & a well set up engine on some 60 profile tyres with some tyre softner with low pressure in may help, don't buy track slicks, they take too long to warm up & the sidewalls are to stiff.
Best i managed with road tyres was 14.01, with drag tyres I dropped into the 13's right away, a bit more playing on the day saw me into the 12's, i was running 24 psi manifold on a highly modded engine & chassis though :mrgreen:

As a rule 180bhp should see 13's.

whitneyd

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« Reply #2 on: 14:43, Mon 16 March 2009 »
What does a standard 5 Turbo weigh?
1995 Escort Cosworth
1994 Renault Express GTT

5teve L

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« Reply #3 on: 16:10, Mon 16 March 2009 »
850-900kg i think..

whitneyd

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« Reply #4 on: 07:00, Tue 17 March 2009 »
My Express is prob a good bit more than that. I'm going to shoot for 13's anyway. I'm hardheaded.
1995 Escort Cosworth
1994 Renault Express GTT

midge

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« Reply #5 on: 19:38, Tue 17 March 2009 »
what mods to engine?

whitneyd

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« Reply #6 on: 07:19, Wed 18 March 2009 »
For 180hp. T25 at 20psi, carb set up, strapped intercooler or front mount. look up 5teve L's car
1995 Escort Cosworth
1994 Renault Express GTT

5teve L

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« Reply #7 on: 08:31, Wed 18 March 2009 »
As long as the standard engine is in good condition, just the mods above, T25/28, intercooler, fueling sorted, poss a decent exhaust as well & 20 psi...

Tyres & turbo make the biggest difference.
You need the 60ft times down to low 2secs or so.

whitneyd

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« Reply #8 on: 08:42, Wed 18 March 2009 »
Ops forgot exhaust
1995 Escort Cosworth
1994 Renault Express GTT

5teve L

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« Reply #9 on: 08:56, Wed 18 March 2009 »
285 cam will help as well so you can rev it higher, i was revving to 7k  before changing (flat shifting) & crossing the line at 6500 on the line in 4th.. standard cam won't want to rev much over 5500-6k without either dropping a valve or bending push rods..

Ash-Lee

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« Reply #10 on: 18:04, Wed 18 March 2009 »
Quote from: "5teve L"
285 cam will help as well so you can rev it higher, i was revving to 7k  before changing (flat shifting) & crossing the line at 6500 on the line in 4th.. standard cam won't want to rev much over 5500-6k without either dropping a valve or bending push rods..


I got REALLY annoyed with my car the once and took it to just over 7'000RPM on the standard cam in the hope it would just break and put it out of it's misery.

It sounded quite painfull.  :twisted:

whitneyd

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« Reply #11 on: 06:17, Thu 19 March 2009 »
They only die when you don't want them to. They're like a bad girlfriend/wife!!!
1995 Escort Cosworth
1994 Renault Express GTT