type-rob

Good morning all,

I've been browsing the previous threads on this but cannot seem to find a definitive answer..

6 speed DCCD boxes.

The differences between Blob and Hawk. Is this just longer gearing in the Hawk? Are they both good for big power builds (as strong as each other) and which would be preferred? Would a Hawk box allow for more spool as the length is better?

I'm confusing myself so if anyone has any experience please help!

Thanks in advance

Rob

bustaMOVEs

iTrader: (31)

Uk hawk has longer 2-6 over the blob so yes slightly more power band ideal for drag etc.

type-rob

Cheers Corky

Murray Motorsport NI

Both good boxes depending on mileage / condition/ previous power run .
Hawk has longer ratios as said , perfect for drag to save on an extra gear change like the previous boxes .

Vxr2010

the newer boxes had a few bits done to improve them but i’m not sure exactly what , but both are tough , the jdm one is shorter ratios and more likely to be better suited to 2 litre engine , the longer ratio 6 speed due to more torque in a 2.5 are better suited to that plus longer ratios better fuel economy , the rear diff needs to match ratio wise the box fitted

The Trooper 1815

iTrader: (31)

If you are thinking of putting a 6 speed into a GC Chassis then consider the extra weight that comes with it.

It may nullify any performance.

Tidgy

A whopping 60kg+ iirc so its a pretty big step up.

Also dont forget hawk box's are design for use on 2.5 so ratios are setup as such.

SmurfyBhoy

We not talking like an extra passenger ?

Or diff between empty and full tank,

Would be interesting to see if anyone ever did the swap only and compared times,

Usually done when modding for power

Would be interesting to see back to back testing with only those parts swapped,

Tidgy

in my type R I went from a type r 5 speed on a 2.5 at 330bhp/360ftlb to a uk hawk 6 speed 396/465 and it didn't feel that much quicker. didnt do any actual testing though im afraid.

SmurfyBhoy

Id really like to see how it went,

Id expect it to be slower over the quarter if there was no power gain but would be interesting to see real testing results,

Tidgy

yeah in hindsight perhaps i should have got some testing done, ah well, bit late now (not only is it already changed, cars now been broken anyway).

what i can tell you is it went like **** hahaha

one interesting note is it pulled alot hard in 3rd than it did in 2nd, turbo couldn;t keep up with the revs.

SmurfyBhoy

I have exact same in mine with shorter 6 speed ratios

Doesn't make full boost till 3rd gear,

1st & 2nd its revving faster than build boost,

Not the only one with this too i read its common with larger turbos on 6 speed

Tidgy

mine was the 2.5 and shorter ratio type R 5 speed.

When i changed it i had a pretty in depth discussion with Pat H about the very subject and best route to go. Hawk UK sti box is a perfect fit for the 2.5 low down grunt.

SmurfyBhoy

Not only that

Unless your running mega power you cross line in 4th eh ?

My blob is in between 4/5th crossing line 12.7@110mph with room for improvement as always haha

Tidgy

my plan was 550bhp so should have been ok lol

bustaMOVEs

iTrader: (31)

A uk or Jdm box crosses the line in 5th mostly unless you sit on limiter for the last yards, a uk hawk box will cross it in 4th nicely

SmurfyBhoy

Anyone know the ratios

Or approx mph your at in 4th gear UK Hawk 7krpm & 8k rpm ?

bustaMOVEs

iTrader: (31)

Not exactly, it's online somewhere. But I believe you have circa 800rpm left on a hawk

gpssti4

iTrader: (6)

On another note. I also played around with tyre sizes. You can go up or down a size in tyre to change the final drive ratio. I've used 215/45/18 and dropping to 215/40/18 made a noticeable difference on the road. Drag racing: would be an easy mod to give a few more mph if running out of revs across the line.

Dubzy

iTrader: (4)

For a big power build the uk hawkeye box is the one to have. longer ratios and will top out at over 200 mph if you have enough power to get there.

Ive just replaced my 04 non dccd 6 speed for an 07 dccd box and find it much better suited. The car dosnt feel as aggressive now with the longer ratios as your not going through the box as quick but its much better suited if you have plenty of torque on tap.

Dubzy

iTrader: (4)

4th gear will top out at aprox 130 mph and will be on the limiter across the quater mile finish line.

johno01

Interesting...would your 0-60 time be slower now then or quicker with hawk Box?

Dubzy

iTrader: (4)

In theory it should be quicker as it will now hit 60 in 2nd gear and maybe have slightly better traction when shifting from first to second.

SmurfyBhoy

1 less shift to 60mph

Prob better fuel economy too

Would that be a 7k limiter at 130 in 4th

If so then 8k would be even more

Gearing capable of 200mph

Dubzy

iTrader: (4)

[QUOTE=SmurfyBhoy;11975530
Would that be a 7k limiter at 130 in 4th

If so then 8k would be even more

[/QUOTE]

I havnt been on the strip since fitting my new box but going by other members results 7800 rpm = 135 mph

banny sti

iTrader: (68)

Hawk box also has carbon synchro to remedy the earlier 6 speed synchro issues, the hawk dccd is 59:41 as opposed to the earlier 65:35 of the earlier boxes

Dubzy

iTrader: (4)

I thought it was hatch onwards that came with the carbon rings ?

banny sti

iTrader: (68)

Doh just double checked and you're right, started on the hatch not the hawk