Intercooler Anyones Thoughts

[gotRICE?]

Dont know what R33 box/diff your running but it doesnt make 160km/h in 3rd.

[PsYLoR]

Het gotRICE, what you talking about

I know I have these specs with my a series 1 r33 gts25t..... I actually tested 1st to 4th speeds out today

Drivetrain

Transmission 5 speed manual

Gear Ratios Maximum Speed in Gears (* theoretical)

1 3.214 62 km/h (38 mph)

2 1.925 104 km/h (65 mph)

3 1.302 154 km/h (96 mph)

4 1.000 200 km/h (124 mph)

5 0.752 266 km/h (165 mph)*

As far as I know mine is all standard Diff/Gearbox.

[jrm]

Weird, I wouldn't have said it made those sorts of speeds either, but I plugged the gearbox ratio / diff ratio information in, and it seems to come up similar. From a quick poke around on the site, R34/R33 manual gearbox have the same diff ratio of: 4.11 (apparently auto r34 is more like 4.0, and 4.363 on r33). And using the gearbox ratios as above (which seem to match up with what I've read through google/sau-search, of 1 - 3.214, 2 - 1.925, 3 - 1.302, 4 - 1.000, 5 - 0.752). And taking into account R34 wheel size of 225/45/R17, and 7500RPM...

R33/R34 Manual

1st 67kph

2nd 113kph

3rd 167kph

4th 218kph

5th 290kph

I would have said the figures were slightly lower than that from my own personal experience, but it can't imagine it would be too far off.

Reference URLs:

http://www.darktide.net/~jrm/topspeed.html

http://justskylines.com/skyline/knowledgeb...calculator.aspx

[gotRICE?]

Well at the drag strip i was reading 13.7 @ 100mph, and 100mph is 160.9km/h, and i was well into 4th crossing the line.

Probly not the greatest idea to admit doing 200km/h on a public road either.

But i guess where our debate conflicts is at what RPM are you reaching 160km/h? Clearly if your shifting at the stock redline then id say i was correct. But if your talking about non-standard rev limits thats a different story.

Both of thosae videos are pretty spot on at shifting at 7000rpm. If you went to 8000 then sure you'd get 160+ easily.

Edited August 24, 2009 by gotRICE?

[PsYLoR]

Probly not the greatest idea to admit doing 200km/h on a public road either.

Not the greatest idea to assume it wasn't done on a dyno / drag strip / race track / private runway either

Well at the drag strip i was reading 13.7 @ 100mph, and 100mph is 160.9km/h, and i was well into 4th crossing the line.

you should of been well into 4th.

When you change from say 3rd to 4th at 7000rpm the revs dont drop to 1000rpm do they?

It will drop from say 7000rpm to like 5000+rpm depending on the driver. So you would be doing 5000+rpm in 4th @ 160km/h "well into 4th i'd say"

[gotRICE?]

Not the greatest idea to assume it wasn't done on a dyno / drag strip / race track / private runway either

you should of been well into 4th.

When you change from say 3rd to 4th at 7000rpm the revs dont drop to 1000rpm do they?

It will drop from say 7000rpm to like 5000+rpm depending on the driver. So you would be doing 5000+rpm in 4th @ 160km/h "well into 4th i'd say"

I fail to see your point in that post. As your now not disagreeing with me, just trying to pick a hole in a comment made.

Regardless of how we interpret "well into 4th", me meaning i was in 4th for a second or two before crossing the line. Not just releasing the clutch as i crossed it. I was hard back on the accelerator.

Go out to your private airstrip/dyno/drag strip, hold the revs at 7000rpm in 3rd gear, and take a picture of the speedo. The 2nd video CLEARLY shows that @ 7000rpm the car is only doing approx 145-150km/h.

[PsYLoR]

lol,

its like 5-10km/h off, take into account that video wasn't made when the car was brand new and that the gear speeds are theoretical as I stated.

You don't even know if that video IS a completely stock car down to exhaust and rims.

Anyway your the one who said....

Dont know what R33 box/diff your running but it doesnt make 160km/h in 3rd.

in return to someone saying....

Just put're in 3rd gear, RB25DET GB+Diff goes up to 160km/h or so in third and you should feel a bit of pull

When clearly 3rd gear can do a "theoretical" 154 km/h (96 mph)

im not being picky I just think you where wrong to say "it doesn't make 160km/h in 3rd."

[jrm]

D'oh, okay I got my cars mixed up - I was thinking my N14SSS for 7500rpm, not R34 - which is 7000rpm redline

.. guessing r33 is the same?

1st 63kph

2nd 105kph

3rd 156kph

4th 203kph

5th 270kph

[(OO)SKYLINE(OO)]

yer just anotherthing if i dont have any cold air intakes or pod is having a fmic still considered unroadworthy in victoria ?

In VIC you can only have one intake mod.

So either a FMIC or an air pod.

Some ppl go both but they shield up the pod, its a bit dodgy, but you can do it that way. LOL!

[Shaun O]

D'oh, okay I got my cars mixed up - I was thinking my N14SSS for 7500rpm, not R34 - which is 7000rpm redline

.. guessing r33 is the same?

1st 63kph

2nd 105kph

3rd 156kph

4th 203kph

5th 270kph

By my calculations using RB25DET Gbox/diff(4.111) in 3rd(1.302) with with 245/45/18's = 26.68" dia, = 167km/h @ 7,000rpm, which I did only 2 days ago

But that wasn't my point, the point is if you want to feel the boost, 3rd gear goes high *enough* that you can safely go down into it when on the highway

[jrm]

By my calculations using RB25DET Gbox/diff(4.111) in 3rd(1.302) with with 245/45/18's = 26.68" dia, = 167km/h @ 7,000rpm, which I did only 2 days ago

But that wasn't my point, the point is if you want to feel the boost, 3rd gear goes high *enough* that you can safely go down into it when on the highway

Ahhh that'd do it .. 245/45/18 is *huge*. I'd highly doubt that's a legal fitment, speedo would be nearly 7% out... AFAIK you're only allowed a 10mm diameter increase without it getting engineered (and requirement to get speedo recalibrated).

225/45/17 = 634.3mm diameter (1992.7mm circ)

vs

245/45/18 = 677.7mm diameter (2129.1mm circ)

... Which would explain why the speedo is reading 167kph ... You're actually only doing 156kph (107% of 156kph = 167kph)

[daisu]

Ahhh that'd do it .. 245/45/18 is *huge*. I'd highly doubt that's a legal fitment, speedo would be nearly 7% out... AFAIK you're only allowed a 10mm diameter increase without it getting engineered (and requirement to get speedo recalibrated).

225/45/17 = 634.3mm diameter (1992.7mm circ)

vs

245/45/18 = 677.7mm diameter (2129.1mm circ)

... Which would explain why the speedo is reading 167kph ... You're actually only doing 156kph (107% of 156kph = 167kph)

If you had larger diameter tyres, it'd be the other way around. Your actual road speed will be higher than the displayed speed on the speedo.

[paulr33]

fyi when i do my 0 to 100km/h tests in my GTST i can top out past 100km/h and stay in 2nd gear

[jrm]

If you had larger diameter tyres, it'd be the other way around. Your actual road speed will be higher than the displayed speed on the speedo.

D'oh! You're right!

I got it the wrong way around .. *confused* ..

.. so the speedo would *show* 156kph, but you're doing 167kph with that sorta circumference change - Well there goes that theory on what's going on!