how heavy should the steering feel? and when does power kick in on a 4age?

[yoshimitsu9]

just got my sprinter today (yay) the steering feels really heavy, so im just wondering if anyone elses is heavy too as in having to use a fair amount of effort. with the power it goes really hard after 3000rpm, is this normal?


i think the explanation of the heavy steering has to do with the wheels, as they seem to be off a nissan or similar (they fill the guards sooo well http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif )

any informations is appreciated

cheers

stefan

[riceburner]

Steering can feel heavy for heaps of reasons.

Start with a good wheel alignment say, toe - 0deg, caster 2.5deg and camber as close to 0 but still equal to the other side. As with toe and castor, as equal both sides as possible. Any decent wheel alignment place should be capable of that, if not, dont go back.

Then if steering still heavy, check tyre psi, should be about 36-39psi or do this before wheel alignement.

If still heavy, have you steering rack ckecked out, i dear say the bush's inside are fuked. And/or your tie rods are totalled, but would cause other problems that would be more noticeable the heavy steering.

Power a motor generates and at what rpm are detirmend by many things. Cams and ecu used, tuning, exhaust system design

For a start what type of 4age, and we could go from there.

3000rpm seems maybe a tad bit low for peak power especially on a 7000-7500rpm capable motor.

[yoshimitsu9]

Steering can feel heavy for heaps of reasons.

Start with a good wheel alignment say, toe - 0deg, caster 2.5deg and camber as close to 0 but still equal to the other side. As with toe and castor, as equal both sides as possible. Any decent wheel alignment place should be capable of that, if not, dont go back.

Then if steering still heavy, check tyre psi, should be about 36-39psi or do this before wheel alignement.

If still heavy, have you steering rack ckecked out, i dear say the bush's inside are fuked. And/or your tie rods are totalled, but would cause other problems that would be more noticeable the heavy steering.

Power a motor generates and at what rpm are detirmend by many things. Cams and ecu used, tuning, exhaust system design

For a start what type of 4age, and we could go from there.

3000rpm seems maybe a tad bit low for peak power especially on a 7000-7500rpm capable motor.[/b]


ill have the place im taking the car to check it out, then go from there

the engine is a 86kw big port with jdm ae86 ecu, i do believe that its running 4agze injectors (black injectors), i will swap them back to factory injectors as the ecu wouldnt like the bigger injectors. justin (jusdrfn86) says his has little power before 3000rpm. but mind u it might be all in my head since ive been driving around a mazda 626 2.2L for the last year so it might be the displacement differences that is throwing me off.

cheers,

stefan

[damo101]

Then if steering still heavy, check tyre psi, should be about 36-39psi or do this before wheel alignement.[/b]
36-39 psi isnt dat a little too much? im running 30(cold) all round on 195/60/14..the label thingy on the car says 28psi..seems alright to me the steering feel is just like a non power steering car..but now it feels heavier than when i was running 185/65/14s

[riceburner]

Check your tyres recomended tyre psi but i bet somewhere between 32-40psi is the normal.

My tyres now are falkens and they says 40-42psi

[LordNafe]

I run my tyres at 40psi. Thought about even going a little higher.
Non power steering AE86's will have heavier steering than your power assisted mazda. Also wide/low offset rim will make your stering heavier.
3000rpm sounds fairly normal, you wouldn't be under 3000rpm in one of these much anyway....

[RobertoX]

T-VIS just kicked in y0

as for tyre pressures im around 38 in the front and 40 in the rear (depending on tyres)

[rthy]

should also depend on ur suspension ie. camber n shit

[skein]

If you have a welded diff they can give the feeling of heavy steering and at slow speeds 'pushing' under tight cornering. Hopefully you don't.

[yoshimitsu9]

put new wheels on it today, makes a massive difference over the rediculously big skyline wheels previously on it. as for the power its prolly due to the length of the extractors

so my problems have been diagnosed and on the way to being fixed http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif

[deanoo]

well i have a 4age 100kw and it kicks in around 4000-4500rpm
my old one was a 100kw bottem end with a 86kwhead and the power could come in around 3000-3500rpm

y do they have diffrent rev ranges??

[yoshimitsu9]

its interesting how small displacements work, i was too used to a 2.2L but after a few days of driving the sprinter im getting used to having to keep the revs up

[mattysshop]

mine is actually lighter than pwr steering in my magna!!

[balistic]

its interesting how small displacements work, i was too used to a 2.2L but after a few days of driving the sprinter im getting used to having to keep the revs up[/b]

..basically for a smaller engine to make the same power as a larger engine, it needs to rev more! Power = rpm x torque in very basic terms. So larger engine with more torque does not need to rev as much as a smaller engine with less torque to make the same power http://www.ae86drivingclub.com.au/forums/emoticons/tup.gif

[Micknofx]

my bigport with tvis removed starts at around 4500 and is really on song by 5500 peaking at about 6600.

[mattysshop]

my modded smallport starts a nice torque curve at a suprising 3000rpm !!! yes you heard right.. some people say port work doesn't do much.. helped out in the torque department!

[riceburner]

well i have a 4age 100kw and it kicks in around 4000-4500rpm
my old one was a 100kw bottem end with a 86kwhead and the power could come in around 3000-3500rpm

y do they have diffrent rev ranges??[/b]

Different compression, slightly different cams + the 100kw doesnt have tvis and is a small port. Ecu tuning would also play a roll in why the 2 motors are so different. Different inlet manifold, different exhaust manifold would also cause the difference you speak of.

But im betting there are more technical reason behind it.

And then you get the odd freak motor, a motor that you can put thru hell day in day out, and still lives to fight another day.