Boosted Falcon

got too tell ya im so happy with it best bang for me buck so far
ratio 4.11 rev's nice at 110 better then i thought
anyways had too tell ya's

motor put in on friday cannot wait

What revs are you getting @ 110 and with what gearbox?

I usually pull 2200 @ 110 and 2k @ 100 with the T5 and a 3.45 diff.

is this my old diff?

Btw, LOL @ the Rocky Balboa quote.


^ the black guys positioning looks suss

DaNeOs wrote:is this my old diff?

yeah mate goes good thanks again had too get a couple of little things done but alls good


Auto
pull 2500 @ 110

Good to hear man. What does it rev at at 110?

Auto
pull 2500 @ 110

Ah thats not too bad. There's some formula for diff gears and revs at certain RPMs but 2500 is really not that bad for 4.11
Good to hear mate!

gerendasi wrote:Ah thats not too bad. There's some formula for diff gears and revs at certain RPMs but 2500 is really not that bad for 4.11
Good to hear mate!

yeah checked out a couple of previous posts some say around 2500 too 2700 at 100 so im happy with that anyways see how it goes with the other motor in it on friday my motor in it now is like dead

original rpm @ set speed (ie 100kph) / old diff ratio * new diff ratio = new rpm @ set speed

yeh mines on 2500ish at 100
2000 at 80
worst part is over 120-130 ya get huge vibration in the tail shaft. time for a 2 peice

2500ish? Dya have low-profile stockies on the back or something Josh?

When I had the original low-profile drift-spec rubber on the 16s (the rims were off an RX7), the car's gearing was way shorter, I think I calculated it to be around the 4.3 ratio rather than 4.11. Plus it scraped like it was on superlows.

what is fuel efficiency like? Mine only revs at 1600 at 100

Commando wrote:original rpm @ set speed (ie 100kph) / old diff ratio * new diff ratio = new rpm @ set speed

shit got expelled first week off year 7
old diff no idea what ratio 3.08 possibly used too sit on about 1650 at 100
but thinking the speedo might have been out by around 10k too many cars were over taken me on the way too Aubury


so now now out by 30 plus ks me think

holmsy wrote:yeh mines on 2500ish at 100
2000 at 80
worst part is over 120-130 ya get huge vibration in the tail shaft. time for a 2 peice

i took it up too 160 smooth as
mind you it was revin its tits off


do low profile's effect it too ?

I'd look at that as:

1650 / 3.08 * 4.11 = ... (busts out the little calculator program in the Start bar)... 2200rpm

Can you get speedo gears for 4.11s?

Commando wrote:I'd look at that as:

1650 / 3.08 * 4.11 = ... (busts out the little calculator program in the Start bar)... 2200rpm

OK well maybe its higher ratio lol
its free too a good home if anyone wants it no noise fells tight

purped wrote:

Commando wrote:I'd look at that as:

1650 / 3.08 * 4.11 = ... (busts out the little calculator program in the Start bar)... 2200rpm

OK well maybe its higher ratio lol
its free too a good home if anyone wants it no noise fells tight

na don't think you can get speedo gears for 4.11 but im going too have too do something

purped wrote:

Commando wrote:I'd look at that as:

1650 / 3.08 * 4.11 = ... (busts out the little calculator program in the Start bar)... 2200rpm

OK well maybe its higher ratio lol
its free too a good home if anyone wants it no noise fells tight

Well, going the other way around (with your 2500rpm)

1650 / 2500 * 4.11 = old ratio = 2.71 I think either your 1650 or your 2500 rpm readings are skewiff. I'm tipping it's your 1650rpm reading.

I reckon you were probably doing around 1800-1900rpm before the diff swap (high 1800s = 3.08 ratio based on your 2500@100 for 4.11 ratio estimate)

do you know how far out ya speedo is?
mine was out by at least 20kmh at 100.
use a jaycar speedo corrector. mine is set perfect to gps accuracy now.

dave mines jus got 205/65 or what ever they are.
standard dunlop things.

i only get 350 k to a tank. but thats 350 k of pure joy

Commando wrote:

purped wrote:

Commando wrote:I'd look at that as:

1650 / 3.08 * 4.11 = ... (busts out the little calculator program in the Start bar)... 2200rpm

OK well maybe its higher ratio lol
its free too a good home if anyone wants it no noise fells tight

Well, going the other way around (with your 2500rpm)

1650 / 2500 * 4.11 = old ratio = 2.71 I think either your 1650 or your 2500 rpm readings are skewiff.

yeah your right i'll have too get it fixed soon i i'll get into much trouble

Commando wrote:

purped wrote:

Commando wrote:I'd look at that as:

1650 / 3.08 * 4.11 = ... (busts out the little calculator program in the Start bar)... 2200rpm

OK well maybe its higher ratio lol
its free too a good home if anyone wants it no noise fells tight

Well, going the other way around (with your 2500rpm)

1650 / 2500 * 4.11 = old ratio = 2.71 I think either your 1650 or your 2500 rpm readings are skewiff. I'm tipping it's your 1650rpm reading.

I reckon you were probably doing around 1800-1900rpm before the diff swap (high 1800s = 3.08 ratio based on your 2500@100 for 4.11 ratio estimate)

yeah i think your right because in certian my speed was 11k out at 110 the other day also i have 17 low profile will this knock it out of wak too ?

it depends mate, on what the overall rolling diameter (from top of tyre to bottom of tyre) comes out as.

You can have 20s or 14s, it just depends on the total rubber height As long as you've got chunky rubber around the 14s or fanbelts around the 20s, and they come to the same height if you measure them with a tape measure, it won't impact on your speedo reading.

well just took it for a drive again bloody fun any ways it was sitting on 140 at 2450rpm an i seemed too be sticking with the other cars lol not a safe guide but thats all i have at the moment

lol nice.
get a gps or somethin man. best way to go till ya fix it.

holmsy wrote:lol nice.
get a gps or somethin man. best way to go till ya fix it.

yeah mate i going too have too get a gps now i think