Toymods Car Club Inc: General Car Talk => Fastest 1JZ in OZ?

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Special Ed
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003

Re: Fastest 1JZ in OZ?	Wed, 23 March 2005 09:30

Just a few facts and figures regarding the JT cars. The navara has produced 460+rwhp on a couple of different dynos so far. All runs were done with the smaller (0.86) rear housing. It is now running a 1.06 rear housing and is making MUCH more power with minimal extra lag. With the small housing any added boost over 22 psi didnt really add any Hp gain (we tried beleive me - 38psi on a demo run at Hunter valley street machines). The ute hasnt had a dyno power run since the new turbo housing, but it is definately making a shiteload more grunt than ever before, we will soon find out as it is entered in the dyno comp @ powercruise this weekend ! The navara by the way came a respectable 24th outright (out of 50 entries) and 9th outright in its class (2L and over unlimmited mods) at the bullahdelah hillclimbs a fortnight ago. Not bad for a street tyred, torsion bar front / leaf spring rear agricultural vehicle. When the ute ran at the WSID it was on second hand slicks(literally thrown away - our new ones didnt arrive in time) in a small size with at least 100 hp less than it has now. We didnt get 1 clean pass with the gearbox misbehaving - redline oil to the rescue - we wont need that excuse anymore ! It also has better gear ratios now with its new full spool and billet axles. It was really a test night to find what was neeeded to run fast, that it ran a low 11 was a pure bonus. It will run 10's next time out. Siko1j was dyno'd at 365 rwkw @ 27.5psi on the hills motorsport dyno. This kind of boost level was done on a dare to win a bet and has not been repeated. Keep in mind it still uses stock injectors AND computer !! It came 4th outright and 1st in class (2L + unlimmited mods) at the hillclimb. Since its dyno runs it too has upgraded the exhaust housing of the turbo, up to a 0.86. 400m runs last week were done at 22 psi with new turbo, on the same street tyres it ran for the hillclimb. we had severe axle tramp problems before the night was cut short due to rain. Another run or two and we might have had time to sort the tyre pressures to reduce tramp allowing a full throttle pass. As it was we wanted to baby it a litle as it still had its torsen LSD from the hillclimb installed and we didnt want to break it ! All runs were done with full tool kit, spare parts, spare tyre etc and all the usual junk that flys around Andy's car on the street. JT Racing is also of the opinion that the cams are a major restriction, that said, serious headwork is not on the cards, at least untill the current uprepared wrecker motor lets go. The project is all about finding the limmit of the stocko 1j, and it just keeps on going ! [Report message to a moderator]

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