## 1990's F1 Engine Torque graphs

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
Testdrive
Testdrive
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Joined: Sat Nov 28, 2020 1:42 pm

### 1990's F1 Engine Torque graphs

Does anyone have 1990's F1 engine torque graphs? I've only found the Mclaren MP4/4.
The rest of the car's just has horse power and the RPM, but I was wondering if there is any data out there with the entire torque graph?

gruntguru
gruntguru
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### Re: 1990's F1 Engine Torque graphs

Testdrive wrote:
Mon Nov 30, 2020 7:50 am
Does anyone have 1990's F1 engine torque graphs? I've only found the Mclaren MP4/4.
The rest of the car's just has horse power and the RPM, but I was wondering if there is any data out there with the entire torque graph?
If you have the power curve, you can calculate the torque curve.

At a given engine speed,
Power = Torque x speed
Torque = Power/speed

It would be great if you post up any graphs you have.
je suis charlie

IMEP_Kingpin
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Location: United States

### Re: 1990's F1 Engine Torque graphs

This is from the Honda RA122E engine. The picture is from the 1993 Honda Technical Review (Japanese language).
https://imgur.com/a/hR24FUf

gruntguru
gruntguru
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Joined: Sat Feb 21, 2009 6:43 am

### Re: 1990's F1 Engine Torque graphs

Any idea how close were the ratios used with that engine? It looks like it would like to stay between 13,000 and 15,000 rpm for best performance.
je suis charlie

IMEP_Kingpin
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Joined: Wed Dec 09, 2020 11:01 pm
Location: United States

### Re: 1990's F1 Engine Torque graphs

Grunt, are you taking about transmission ratios? The paper is only about the engine alone.
It'd be nice to know what they were.

Tommy Cookers
Tommy Cookers
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### Re: 1990's F1 Engine Torque graphs

IMEP_Kingpin wrote:
Wed Dec 09, 2020 11:15 pm
This is from the Honda RA122E engine. The picture is from the 1993 Honda Technical Review (Japanese language).
https://imgur.com/a/hR24FUf
https://i.imgur.com/LVKF58Z.jpg
fwiw Nye's Autocourse book says (of the 1991 season) ....
'extensively modified 14800 rpm V12 in time for the Hungarian GP '. with actively controlled variable-length induction trumpets the early hole in the torque curve's mid-range had been adequately filled and from Spa forward the RA121E in its latest form regained superiority ... securing Honda's fifth successive share in F1 WC title'

grandprixengines.co.uk seems to have some RA122E info titled significant other SO20 .....
https://www.grandprixengines.co.uk/Sign ... _Other.pdf

IMEP_Kingpin
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Location: United States

### Re: 1990's F1 Engine Torque graphs

Testdrive
Testdrive
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Joined: Sat Nov 28, 2020 1:42 pm

### Re: 1990's F1 Engine Torque graphs

This is from the Honda RA122E engine. The picture is from the 1993 Honda Technical Review (Japanese language).
https://imgur.com/a/hR24FUf
https://i.imgur.com/LVKF58Z.jpg
[/quote]

Nice, Very Nice It looks like its pulling 764HP at 14,440RPM. I might mod this data into the Assetto Corsa Mod.

The machine in action

The only other one I seen was the MP4/4

https://imgur.com/a/ifEfUvJ

Thanks for that.
Last edited by Testdrive on Tue Dec 29, 2020 3:52 pm, edited 6 times in total.

Testdrive
Testdrive
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Joined: Sat Nov 28, 2020 1:42 pm

### Re: 1990's F1 Engine Torque graphs

I suspect the 1990's and 1991's car maybe 1992's car had special fuel for qualifying that gave the car's an extra 20HP.

IMEP_Kingpin
3
Joined: Wed Dec 09, 2020 11:01 pm
Location: United States

### Re: 1990's F1 Engine Torque graphs

SO document says this:
Up to the Hungarian GP the fuel companies (Shell in Honda’s case) had continued to produce special “Petrols” (see Note 90 Sub-Note B). FISA then imposed a ban on any constituent not found in ordinary pump fuel. This “Real Petrol” dropped the RA122E/B power from 804 to 764 BHP (-5%).

Testdrive
Testdrive
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Joined: Sat Nov 28, 2020 1:42 pm

### Re: 1990's F1 Engine Torque graphs

IMEP_Kingpin wrote:
Thu Dec 31, 2020 8:19 pm
SO document says this:
Up to the Hungarian GP the fuel companies (Shell in Honda’s case) had continued to produce special “Petrols” (see Note 90 Sub-Note B). FISA then imposed a ban on any constituent not found in ordinary pump fuel. This “Real Petrol” dropped the RA122E/B power from 804 to 764 BHP (-5%).
The MP4/6 in 1991, did qualifying much quicker then in 1992 and Wiki it rates the engine 725–760 hp, so basically add 40HP for early and Late season qualifying. 765 at Imola 1993 1:21.877, 800HP at Suzuka doing 1:34:700 times. Makes sense. What doesn't make sense in 1992 with 764HP it only managed 1:23.086 at Imola, maybe it was the conditions, or bad luck.

Testdrive
Testdrive
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Joined: Sat Nov 28, 2020 1:42 pm

### Re: 1990's F1 Engine Torque graphs

Does anyone clear information about the 1994 Benetton Engine?

I've read that it had 740HP, 750HP at 14500RPM. I also read a comment on Youtube, he said it has 794HP at 14350PRM and about 460 of torque at 11600RPM at Imola 1994. I suspect it was 750HP. Shumi used a really small wing to get to 320KM on the straight. I've did test's at 796HP I was able to get the qualifying time. With 750HP, I was out about 0.350ms and that was with traction control and many tries. You have next to no grip, since the downforce is low.

IMEP_Kingpin
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Joined: Wed Dec 09, 2020 11:01 pm
Location: United States

### Re: 1990's F1 Engine Torque graphs

100mm bore and 55.7mm stroke.
730HP @ 13,800rpm
Whereas the 1994 Renault RS6 is not acknowledged to be a completely new engine, the Ford Zetec-R most certainly is. The eventual need for a very high-speed engine had been foreseen well before November 1991, at which time the very compact and lightweight Ford V12 began its testbench career. For several reasons, this was to remain a research exercise, but one which contributed significantly to future eight-cylinder development. Therefore, in mid-1992, the design of a very high-speed eight-cylinder HB successor engine, to be launched as the Ford Zetec-R, was initiated. This Is the Benetton power unit for 1994, and it must make the team confident of now being able to challenge Williams-Renault, McLaren-Peugeot, and all the rest, at a level not open to it in recent years.

Although, through Cosworth, Ford has always delivered more engine performance at the beginning of each season, the step-change which the Zetec-R is expected to bring to the early events of 1994 is probably unprecedented in the camp. And one can anticipate that its performance will improve as the season develops, and more of the engine’s potential is realized. The Zetec-R, initially with a 14,500rpm limit, can be expected to develop maximum power in the 13,500-14,000rpm range. Early in its career and at a conservative estimate, it should thus produce 30-35bhp more than the best HB level – bearing in mind the stricter fuel formulation rules this year.
https://www.racecar-engineering.com/new ... pirations/

ndibiase
ndibiase
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Joined: Thu Jan 28, 2021 10:49 am

### Re: 1990's F1 Engine Torque graphs

IMEP_Kingpin wrote:
Sat Dec 12, 2020 7:36 pm
The PDF of the honda
Link is expired. Can you post a new one. Thanks. it must be a very interesting reading!
Last edited by ndibiase on Thu Jan 28, 2021 3:54 pm, edited 1 time in total.

Brian Coat
Brian Coat
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Joined: Sat Jun 16, 2012 5:42 pm

### Re: 1990's F1 Engine Torque graphs

Testdrive wrote:
Tue Dec 22, 2020 10:18 am
This is from the Honda RA122E engine. The picture is from the 1993 Honda Technical Review (Japanese language).
https://imgur.com/a/hR24FUf
https://i.imgur.com/LVKF58Z.jpg
Nice, Very Nice It looks like its pulling 764HP at 14,440RPM. I might mod this data into the Assetto Corsa Mod.

The machine in action

The only other one I seen was the MP4/4

https://imgur.com/a/ifEfUvJ
https://imgur.com/a/ifEfUvJ

Thanks for that.
[/quote]

The in-race rpms gear ratios and an approximation of power may be extracted from this clip.