Murphy
|
| posted on 17/11/11 at 09:17 PM |
|
|
Diff and speed
I have an R1 engine and 4.4 diff. I have a 3.44 also. What's the differences for power, top end 0-60 torque and so on. I'm new to this
but was hoping for a wee starter from the peeps in the know. Cheers , John.
|
|
|
|
|
mark chandler
|
| posted on 17/11/11 at 09:27 PM |
|
|
What tyres, this is key.
First thing, bin the 4.4 for the 3.44, you want max speed just as the engine tops out, a 4.4 it will rev out early and waste first gear
|
|
|
Bare
|
| posted on 17/11/11 at 09:28 PM |
|
|
Caterham owners who retrofitted Hyabusa engines typically went for 3: 2 or 3:07 (when they could find them) Diff ratios.
4:1 may mean real quick acceleration... to the 60mph top speed :-)
|
|
|
v8kid
|
| posted on 17/11/11 at 09:28 PM |
|
|
Long diffs for cruisers short diffs for speedsters.
Thats about it I think!
Cheers!
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
|
|
|
wylliezx9r
|
| posted on 17/11/11 at 09:29 PM |
|
|
Crikey with a 4.4 diff you'd be topping out at about 90 buzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 
I spent a lot of money on booze, birds and fast cars. The rest I just squandered.
George Best
|
|
|
kevmcdo
|
| posted on 17/11/11 at 09:32 PM |
|
|
Hi mate
Do a search for gear calculator that should give you a pretty close idea as it takes into consideration tyre sizes too. If can't find it give me
a shout and I will email it too you.
If I remember off the top of my head though you should be looking at a top speed change from approx 90mph to around 125mph with a bit more time
between the gear changes!!!
|
|
|
adithorp
|
| posted on 17/11/11 at 09:37 PM |
|
|
There's a gear/speed calculator sticky thread at the top of this section. 4.4 won't work well with an R1 (final drive ratio varies by
year) but the 3.44 shouldn't be too bad.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
liam.mccaffrey
|
| posted on 17/11/11 at 09:47 PM |
|
|
bigger numbers in the diff ratio will give a lower top speed for the same engine speed output, but faster acceleration due to increased effective
torque at the wheel
smaller numbers in the diff ratio will give a higher top speed for the same engine speed output, but slower acceleration due to reduced effective
torque at the wheel
Build Blog
Build Photo Album
|
|
|
Murphy
|
| posted on 17/11/11 at 09:49 PM |
|
|
quote:
Originally posted by kevmcdo
Hi mate
Do a search for gear calculator that should give you a pretty close idea as it takes into consideration tyre sizes too. If can't find it give me
a shout and I will email it too you.
If I remember off the top of my head though you should be looking at a top speed change from approx 90mph to around 125mph with a bit more time
between the gear changes!!!
Haha. Just text you too. Thanks for all the answers. Seems I will get everything I need on here.
The quick off the mark is great but did a round trip on troweled and needed a wee bit more. Did a ton OK on the 4 but it did buzz away.
Ear plugs- problem solved.
|
|
|
