I call BS on these IRTB/1.9 numbers... - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-09-2009, 02:31 PM   #1
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Default I call BS on these IRTB/1.9 numbers...

ClubRoadster.net

The car is dope, but those Japs are lying.
Engine
Maximum Output: 320PS (315hp) @ 8500 RPM
Maximum torque: 35Kg (253 ft-lb) @ 6,700 RPM
Built by: Maruha Motors
Displacement: 1930cc
Bore stroke: 85.0mm 85.0mm
Compression ratio: 12.7: 1
Intake system: TOYOTA 4AG individual throttles
ECU: MoTeC M48-ADV ROG
Ignition coil: MoTeC
CDI: MoTeC
Cam: Toda Racing 300 degree 10.7mm lift
Lifter: Toda Racing shim under bucket solid mechanical type
Valve spring: Toda Racing strengthened type
Timing gear: Toda Racing adjustable
Piston: Toda Racing forged 85.0mm φ
Connecting rod: Crower
Crank: Original crank lightened and polished
Head Gasket: Toda Racing 0.8 mm
Oil cooler radiator
Nitrous oxide: Dry shot 8

Drivetrain
Clutch: ATS carbon clutch
Transmission: MATSUDA SUPIDO FURUKUROSUMISSHON (???)
LSD: ATS carbon LSD
Final Drive Ratio: 5.1:1

Edit: just reread the post and it looks like their claiming that with nitrious...wtf, thats kind of lame

Last edited by jacob300zx; 11-09-2009 at 02:43 PM.
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Old 11-09-2009, 02:33 PM   #2
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they are spraying nitrous
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Old 11-09-2009, 02:44 PM   #3
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yup just read that, well anything is possible with nitrious so i guess this is a fail.

Would that even work for 1 lap, idk if a big bottle would even last that long. they are obviously running a 100 shot or more.
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Old 11-09-2009, 02:44 PM   #4
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Yah its impossible to make those numbers N/A.

I cant remember if it was on here or on M.net, but at some poin I did the calculations to show that it would require an impossibly high brake mean effective pressure to make that much torque from a 1.9L engine, the power numbers are possibly from a 1.9L but it would require reving the engine to an extremely high rpm. Ill see if I can find the thread...


EDIT: found it.

Quote:
Originally Posted by Full_Tilt_Boogie View Post
O ****, I thought they said they were making 215 hp, not 315.
315 hp/250 ft lbs is impossible, those numbers have to be with the nitrous...


BMEP = 150.8 x TRQ / Displacement

1930cc = 117.8 ci
150.8 x 253 ft-lbs / 117.8 cu in = 323 PSI

Its pretty widely accepted that 190-200 PSI is the limit for a otto cycle engine
Not even Formula 1 engines exceed 200 PSI by much.
So yah, those numbers are impossible without nitrous of forced induction.
Quote:
Originally Posted by Full_Tilt_Boogie View Post
Lets say that they put huge amounts of money into the engine and really maximized it in every way and were able to get a brake mean effective pressure of 200 psi.

200 psi = 150.8 x TRQ / 117 ci in
TRQ = 155 ft lbs

so the maximum torque output possible would be around 155 ft lbs

now lets say that they tuned the power band so it makes peak torque at 8000 rpm, for maximum power

155 ft lbs x 8000 rpm / 5252 = 236 hp

so there yah go, the maximum output of a 1.93 L engine in the sub-9k rpm range is going to be 155 ft lbs/ 236 hp


EDIT:

but yah, for a 2.1L engine it would be 170 ft lbs and 259 hp at 8000 rpm
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Old 11-09-2009, 02:53 PM   #5
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chekc it yo noz is bringin da pain n yall kant hang so yu be hatin kuz
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Old 11-09-2009, 03:39 PM   #6
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nozzzzz
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Old 11-09-2009, 03:50 PM   #7
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I call BS but I'd kill every one of you for that car.
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Old 11-09-2009, 04:15 PM   #8
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that car is sick. old news tho'. it was already determined that the car made
2xx.xx whp. the 320 is some other form of measurement, and on an engine dyno, not a chassis dyno.

and i would take the easy route and kill hustler for that car.........................

....after he killed all of y'all!
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Old 11-09-2009, 04:22 PM   #9
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Where are the pics of this said car? Some of us don't post on CR.
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Old 11-09-2009, 04:34 PM   #10
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We've already had this convo, pics, vids, and all.....https://www.miataturbo.net/forum/t38053/
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