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My 33gts-t top speed...

SLY33

By SLY33,
in Engines & Forced Induction

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SLY33 Mentor

SLY33

Posted
Posted

had the car at about 6500rpm in fifth** and the FC controller was saying 226km/hr, so i assume my top speed to be maybe 235ish. I thought it would go much faster than this somehow! I was speaking to a guy in a yellow CV8 monaro number plate VOODOO in S.A. who told me he topped out at 270km/hr, with 204rwkw. Is this possible? if so i imagine its coz of the long legged 6th gear.

Has anyone else got a speed for the top of fifth? (come on you've all been there!)

**under controlled conditions on a private road :)

also i was surprised at how smooth and stable the car was at this speed.

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whatsisname Grand Master

whatsisname

Posted
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I've sat a few lengths behind an R34 GT-R with a 300km/h speedo that was showing close to ~260km/h. Not sure what rev's I was doing as I was more keen on looking down the track.

If you have enough room I'm sure you'd get more than 235km/h Al. How accurate is the speed reading on the FC Controller? Where does it take the signal from?

tridentt150v Grand Master

tridentt150v

Posted
Posted

Had mine to 250kph, and ran out of road, it wasn't flat. AND It was a hot day and I still had the a/c going [forgot to turn it off, and the fan was on the two position, so the a/c was working]. I reckon with the right road and no a/c I might see 260-270.

The 300kph speedo was checked and calibrated only a short while before this, so have to assume it was correct [wheel ratios and sizes may have changed it a bit though, I'm on 17" rims and advan 40zr17 tyres].

SLY33 Mentor

SLY33

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ok ok.. factor in i have 19inch rims, i think that means that my speedo now under-reads, am i correct? I think also the faster i go, the more it will under read? im not sure.

The rims are a good deal taller than the stock wheel/tyre combo. So in fact i may have been doing ~250 but the FC only showing 226...

i dont know where the FC gets its speed reading from, but it matches the speedo on the dash pretty much exactly.

sydneykid, if you are correct, with my tall wheels at 6500rpm, that wouldve put me close to the 270 mark?!!??

Duncan Grand Master

Duncan

Posted
Posted

or just drive ur car up to NT and hoon along the Stuart Hwy to your heart's content

Mine tops out at 193 according to the GPS speedo on 265/30 18s. But that *might* be the speed limiter.....about 4500rpm in 5th...

BTW, by my calc 7000 in 5th is 285, Sydneykid is 5th gear 0.694? and diff 4.11:1?

Oh, and make sure you pick a really long airstrip, 800m is nowhere near enough, so Goulburn is out :)

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