Thread: New Cylinder Head

I can see just over 4K when booting it in traffic so its being restricted somewhere/ somehow.

thing is, it sounds like its doing more. at 2500rpm almost sounds like she's at full power. im wondering if when i changed alternator few years ago, maybe i put one with small pulley so now it says it's doing 2500 when its actually doing 4000. would this be a possibility? how are the alternator and kms travelled linked in a disco?

i'll start a new thread regarding this. this cylinder head one has been very useful but i think it's time to rest it.

When your tachometer reads 2000rpm, how fast are you travelling in fourth gear?

Aaron

Originally Posted by Aaron IIA

When your tachometer reads 2000rpm, how fast are you travelling in fourth gear?

Aaron

i'll check when im driving home and post answer in the new thread. from guessing i would say about 60-70kmh. i have 245/75 tyres on though.

i will confirm exact speed later.

Originally Posted by Fausto79

i'll check when im driving home and post answer in the new thread. from guessing i would say about 60-70kmh. i have 245/75 tyres on though.

i will confirm exact speed later.

I'm doing 100kph at 2150rpm and taking in account the 265/75's that about 105 actual speed.

Originally Posted by loanrangie

I'm doing 100kph at 2150rpm and taking in account the 265/75's that about 105 actual speed.

Im surprised to hear that actually.
I thought those duzzel things were geared a little different?
My v8 disco sits in top gear 100kms at around 2k rpm.
And i run 33s.

Gearing is the same , your speed is taking into account the 11% or so under reading of your speedo ?

Sent from my GT-I9300 using AULRO mobile app

Originally Posted by loanrangie

Gearing is the same , your speed is taking into account the 11% or so under reading of your speedo ?

Sent from my GT-I9300 using AULRO mobile app

I cant say how far its out exactly mate.
However if i sit at about 92kms its pretty close to 100 so less than 10% i would say. I guess that would be closer to 8%??
That is me using those speed reader things on some freeways. Not sure how accurate they are though.


Also i use a speed app on my mobile phone which reads about the same as above. 8% i think.