Bennoz 6A13 Conversion

[spetz]

Wow that really does look nice.
Hurry up and put it in, and write an extensive review!

[Bennoz]

Im on it! Lol

Bearings and speedo drive now on. Just torquing the crown wheel on as we speak

[aza013]

Something like that should be out in the open so all can see it not hidden away in a box .

[spetz]

Should we be expecting a report by the weekend Bennoz??
I hope it all goes well!

[I8A4RE]

Something like that should be out in the open so all can see it not hidden away in a box .

Perspex case?

[Bennoz]

Almost done now

[spetz]

Bennoz do you think it would be hard to retrofit something like a DC5R gearbox onto the FTO motor?

[Astron_Boy]

I agree with Aza.

Bennoz, as Simon also suggested in a slightly different way, Can you make your gearbox case from perspex?

[Bennoz]

DC5R boxes?? Perspex?? Have you all been sniffing glue again?

Box is now finished, sitting under the car, waiting till this arvo to hoist her up & bolt her in

[spetz]

Well the DC5R box won't be good for you, but what about the people who remain NA?
Do you think it is possible to use the Honda box?

[Bennoz]

Well the DC5R box won't be good for you, but what about the people who remain NA?
Do you think it is possible to use the Honda box?

Why?? Whats wrong with mitsubishi boxes?

No, I dont reckon you'd have a bulls roar of a chance with the Honda box. You'd have to completely redo the housing I'd imagine. Super expensive!

[spetz]

I think a main reason why K20A cars are so fast is due to the gearbox.
6th gear in them is shorter than 5th in our 5 speed. Each upshift only drops about 2,000rpm per gear

[aza013]

You don't need to change the box just the gears in the box.

[SG]

The gears are already suited to keep the engine in mivec range when you change them..you never drop below 6 grand anyway when you change at 8

The only thing it could do with is a longer first imo..cos then you could rev it up higher before dropping the clutch at the drags and it would last a bit longer

[spetz]

Changing the gear ratios would result in really high rpm in 5th.
Also 1st to 2nd is horrible.

I already have a 4.625 FD + taller 1st + shorter 2-4th, but the Honda 6 speed has perfect ratios...

[SG]

Evo 5/6 gear ratios would be my wet dream at the moment..didnt realise how short first was... to second. (standard)

Code: Select all

Gear	Speed at 8000	KPH away from mivec for next gear


4.312 Final Drive (FTO Standard)
~~~~~~~~~~~~~~~~~~~~
1st	61.57		+20.58kph to mivec range
2nd	113.31		+2.68kph to mivec range
3rd	159.98		inside mivec by 4.69kph
4th	214.19		inside mivec by 19.13kph
5th	269.05

4.529 Final Drive (FTO Gears)
~~~~~~~~~~~~~~~~~~~~
1st	58.62		+19.59kph to mivec range
2nd	107.88		+2.55kph to mivec range
3rd	152.32		inside mivec by 4.47kph
4th	203.93		inside mivec by 18.22kph
5th	256.16

4.625 Final Drive (FTO Gears)
~~~~~~~~~~~~~~~~~~~~
1st	57.40		+19.19kph to mivec range
2nd	105.64		+2.5kph to mivec range
3rd	149.16		inside mivec by 4.38kph
4th	199.70		inside mivec by 17.84kph
5th	250.84

Complete Evo4 Gears (version with 4.529 Final Drive)
~~~~~~~~~~~~~~~~~~~~
1st	75.42		+2.67kph to mivec range
2nd	107.71		inside mivec by 2.25kph
3rd	145.46		inside mivec by 6.52kph
4th	191.65		inside mivec by 7.06kph
5th	276.60

Complete Evo4 Gears (version with 4.875 Final Drive)
~~~~~~~~~~~~~~~~~~~~
1st	70.00		+2.55kph to mivec range
2nd	100.00		inside mivec by 2.03kph
3rd	135.14		inside mivec by 6.06kph
4th	178.05		inside mivec by 6.56kph
5th	236.50

Complete Evo5/6 Gears (standard 4.529 Final Drive)
~~~~~~~~~~~~~~~~~~~~
1st	75.42		+2.67kph to mivec range
2nd	107.71		+0.52kph to mivec range
3rd	149.29		inside mivec by 1.59kph
4th	203.73		inside mivec by 3.62kph
5th	276.02

[spetz]

Does the final drive and gears from an Evo box fit the FTO box?

[SG]

Not sure i was just gonna use the whole box if i do an awd conversion...I'll have the box out then...

[spetz]

The thing with turbo motors though is the torque is so immense and flat that the ratios make less of an impact than an NA motor.
Ignoring lag, I think it would be faster to have longer ratios + more boost as you would lose more time/speed when changing gears

[Bennoz]

So glad I spent all that money on the red coating, you can really see it

Haven't gone for much more than a few laps of the block at this stage, so can't really give a detailed review yet.
I can say that it behaves like quite the gentleman when slow speed manouvering, no more clunking & neck snapping clutch plate chatter.
It drives just like a normal full slip diff. The only chance I had to punch it was down Sunnyholt road breifly & its just like it used to, it left
2 thick black tracks all the way down to my turn off

In going to go easy on it till next Tuesday when I'll do an oil change on the box. Call me paranoid, but because it was a ground up rebuild
including clusters & syncros, I want to bed it in a bit first.

Then, come Wednesday next week I might throw her down the strip at Eastern Creek before a full blown run at Wakfield on Thursday