Your Top Speed:

[hodgie]

Originally Posted by kenny wingate

most skylines have the power to do 200+ its just getting their.

Where did you get that info?

[hodgie]

Cheers Mick

[m6beg]

Originally Posted by hodgie

Where did you get that info?

Jesus i whish that was true.


Mick

[jaycabs]

197 mph according to speedo

R32 GTR
hks 2530's
apexi power fc
800cc os giken injectors
greddy forged pistons
trust/greddy airnex induction kit
profec spec b boost controler
hks actuators
standard cams
standard radiator
standard intercooler
standard afm's
excedy twin plate clutch with light weight flywheel
1.4 bar boost
lots of other little bits and know i could nudge more but the standard brakes always scared me lol .

[jaycabs]

Originally Posted by mambastu

What tyres are people using for the very high speeds ?

toyo proxes t1r's with 300 kph rating

[bkvj]

Originally Posted by kenny wingate

ok mate cool cool.
236 though. im interested now.
v been looking at how to delimit the engine topend.
most skylines have the power to do 200+ its just getting their.

Very deep pockets for big powahs and aerodynamic work will get you there

[kismetcapitan]

360 Modenas are slow. well, except this one:

There are too many limits to the R32 and serious top speed - bad aerodynamics, gearing, things get real slow in terms of acceleration at least for me and 600bhp about say, 160mph.

When I first got into this game, I wanted a 200mph car, but now find it rather pointless because that's hard to achieve even on a superhighway. Hitting 180 briefly is one thing, but squeezing out another 20 requires lots of road. Exotics are more well-suited to such antics; I'd need to fall in love with something other than the R32 in order to seriously play that game. Either that, or build a 1200bhp engine!

fwiw, I see a difference between "practical" top speed and "absolute" top speed. This comes into play with drag-limited cars or vehicles. There's a point where the vehicle hits a wall, and might slowly pull a few more mph, given a few more miles of road For example, I consider my bike to be a 135mph machine. It's a rocket to 120, picks up the next 15 reasonably well, but then the climb to redlining 6th gear (142mph) is so slow as to be impractical. Such is the nature of a non-aerodynamic, torque-rich but horsepower-poor machine.

[GT-R Glenn]

197 mph according to speedo

Yeah Ive seen a few cars with incredibly inacurate speedo's.

What RPM was it doing at 197mph ?

Heres 10,000 RPM with standard 5th gear and 3.54 final drive
OS Type A ratio's except 5th
Gear Mph per 1000 RPM Mph @10000 RPM Mph @10000 RPM
--------------------------------------------------------
1 7.82 78 78
2 12.35 124 124
3 17.02 170 170
4 19.12 191 191
5 27.90 279 279

Mph RPM (in Gears)
-------------------------------------------------
1 2 3 4 5
-------------------------------------------------
5 639 405 294 261 179
10 1279 810 588 523 358
15 1918 1214 881 784 538
20 2558 1619 1175 1046 717
25 3197 2024 1469 1307 896
30 3836 2429 1763 1569 1075
35 4476 2834 2057 1830 1255
40 5115 3238 2350 2092 1434
45 5755 3643 2644 2353 1613
50 6394 4048 2938 2615 1792
55 7033 4453 3232 2876 1971
60 7673 4858 3526 3138 2151
65 8312 5262 3819 3399 2330
70 8952 5667 4113 3661 2509
75 9591 6072 4407 3922 2688
80 6477 4701 4183 2868
85 6882 4995 4445 3047
90 7286 5288 4706 3226
95 7691 5582 4968 3405
100 8096 5876 5229 3584
105 8501 6170 5491 3764
110 8906 6463 5752 3943
115 9310 6757 6014 4122
120 9715 7051 6275 4301
125 7345 6537 4481
130 7639 6798 4660
135 7932 7060 4839
140 8226 7321 5018
145 8520 7583 5198
150 8814 7844 5377
155 9108 8106 5556
160 9401 8367 5735
165 9695 8628 5914
170 9989 8890 6094
175 9151 6273
180 9413 6452
185 9674 6631
190 9936 6811
195 6990
200 7169
205 7348
210 7527
215 7707
220 7886
225 8065
230 8244
235 8424
240 8603
245 8782
250 8961
255 9140
260 9320
265 9499
270 9678
275 9857

Gear Change RPM drop (change @10000) RPM drop (change @10000)
-------------------------------------------------------------
1 -> 2 -3669 (to 6331) -3669 (to 6331)
2 -> 3 -2742 (to 7258) -2742 (to 7258)
3 -> 4 -1100 (to 8900) -1100 (to 8900)
4 -> 5 -3145 (to 6855) -3145 (to 6855)


9000 MAX and standard R32 Diff

Gear Mph per 1000 RPM Mph @9000 RPM Mph @9000 RPM
--------------------------------------------------------
1 6.74 61 61
2 10.64 96 96
3 14.66 132 132
4 16.47 148 148
5 24.03 216 216

Mph RPM (in Gears)
-------------------------------------------------
1 2 3 4 5
-------------------------------------------------
5 742 470 341 304 208
10 1485 940 682 607 416
15 2227 1410 1023 911 624
20 2969 1880 1364 1214 832
25 3712 2350 1706 1518 1040
30 4454 2820 2047 1821 1248
35 5197 3290 2388 2125 1457
40 5939 3760 2729 2429 1665
45 6681 4230 3070 2732 1873
50 7424 4700 3411 3036 2081
55 8166 5170 3752 3339 2289
60 8908 5640 4093 3643 2497
65 6110 4434 3946 2705
70 6580 4775 4250 2913
75 7050 5117 4554 3121
80 7520 5458 4857 3329
85 7990 5799 5161 3537
90 8460 6140 5464 3745
95 8930 6481 5768 3954
100 6822 6071 4162
105 7163 6375 4370
110 7504 6679 4578
115 7845 6982 4786
120 8186 7286 4994
125 8528 7589 5202
130 8869 7893 5410
135 8196 5618
140 8500 5826
145 8804 6034
150 6242
155 6451
160 6659
165 6867
170 7075
175 7283
180 7491
185 7699
190 7907
195 8115
200 8323
205 8531
210 8739
215 8948

Gear Change RPM drop (change @9000) RPM drop (change @9000)
-------------------------------------------------------------
1 -> 2 -3302 (to 5698) -3302 (to 5698)
2 -> 3 -2468 (to 6532) -2468 (to 6532)
3 -> 4 -990 (to 8010) -990 (to 8010)
4 -> 5 -2831 (to 6169) -2831 (to 6169)


8000 limit 4.11 diff 255/40/17 's standerd 5th gear

Gear Mph per 1000 RPM Mph @8000 RPM Mph @8000 RPM
--------------------------------------------------------
1 6.74 54 54
2 10.64 85 85
3 14.66 117 117
4 16.47 132 132
5 24.03 192 192

Mph RPM (in Gears)
-------------------------------------------------
1 2 3 4 5
-------------------------------------------------
5 742 470 341 304 208
10 1485 940 682 607 416
15 2227 1410 1023 911 624
20 2969 1880 1364 1214 832
25 3712 2350 1706 1518 1040
30 4454 2820 2047 1821 1248
35 5197 3290 2388 2125 1457
40 5939 3760 2729 2429 1665
45 6681 4230 3070 2732 1873
50 7424 4700 3411 3036 2081
55 5170 3752 3339 2289
60 5640 4093 3643 2497
65 6110 4434 3946 2705
70 6580 4775 4250 2913
75 7050 5117 4554 3121
80 7520 5458 4857 3329
85 7990 5799 5161 3537
90 6140 5464 3745
95 6481 5768 3954
100 6822 6071 4162
105 7163 6375 4370
110 7504 6679 4578
115 7845 6982 4786
120 7286 4994
125 7589 5202
130 7893 5410
135 5618
140 5826
145 6034
150 6242
155 6451
160 6659
165 6867
170 7075
175 7283
180 7491
185 7699
190 7907

Gear Change RPM drop (change @8000) RPM drop (change @8000)
-------------------------------------------------------------
1 -> 2 -2935 (to 5065) -2935 (to 5065)
2 -> 3 -2194 (to 5806) -2194 (to 5806)
3 -> 4 -880 (to 7120) -880 (to 7120)
4 -> 5 -2516 (to 5484) -2516 (to 5484)


PS I would just like to add, if anyone blows up there engine while doing this I take no responsibility and will not partake in any diagnostic threads to resolve why it blew up

[matt j]

Your list for the 10,000 RPM drive is 'very similar' to 6th Gear on a UK OSG 88/II with R34 rear diff.

(Just noticed your edit)

[GT-R Glenn]

The 34 diff is hell tall compared to the 2 or 3, perfect for the land speed record.
I used .754 x diff ratio in each instance.
255/40/17's or = diameter.
Factory tacho's are about as reliable as the factory oil pressure sender unit.
If you could pull 10,000 in 5th with the 2 or 3 final ratio on those tires you could do 240 or so MPH

Gear Mph per 1000 RPM Mph @10000 RPM Mph @10000 RPM
--------------------------------------------------------
1 6.74 67 67
2 10.64 106 106
3 14.66 147 147
4 16.47 165 165
5 24.03 240 240


Whats that yellow car run ?

[matt j]

Not sure what Mick runs with TBH.

I have the OS88/II (0.784 = 6th) with std R33 diff at 4.111, 285/30/19 tyres and GPS calibrated dash and limit was at 8500rpm - which I calculate to be 201.9mph?
Dash indicated 199mph.

[GT-R Glenn]

325k so yep 202mph at 8500
do you know all tha ratio's of the seqential box ?

[GT-R Glenn]

This is an awesome free ap

GearCalc

I used to use a calculator / I used to have the formula on my sig.

[matt j]

Originally Posted by GT-R Glenn

325k so yep 202mph at 8500
do you know all tha ratio's of the seqential box ?

I use a spreadsheet developed by Hugh on here.

[kismetcapitan]

what are your EGTs when you hit your top speed? By 170mph I'm at 900 degrees, which is my conservative limit. I either have to advance timing at 7500-8500 RPM, or just screw it all and ignore the EGT gauge - I've done that once, but how many more times can I do that??