Yeah I know there are a million forums on headers.pacemakers and extractors I'm looking.to get full exhaust system for my tj Magna sports and was wonderong which one would be best to improve 0-100 times since that's all I care about thanks heaps

IMO, High end for 5 speed, Mid range torque for a 4speed. The 5 speed is just geared better to keep it reving up to 100, the 4 speed @100 kmph is doing 4,000 RPM therabouts.
So it Pacemakers for high end power and HM Headers for torque.

So pacemakers would be better for me then I have a 5 speed tiptronic so auto thanks heaps for that

So pacemakers would be better for me then I have a 5 speed tiptronic so auto thanks heaps for that

The unwritten rule about AMC, always, yes always, wait for a few experienced members to chime in and give their opinion, there was a guy who took the first persons advice and wasted lots of $$$$$$$$$$$$.
Not saying I'm wrong, but what I said is just an opinion, anything written here should be taken as anonymous pub banter, unfortunately.

Haha thanks shoot but I'm not idiot lol not gonna do anything till iv done enough research just enquiring here since a lot of the members here have done a new exhaust

but I'm not idiot lol

Careful with the grammar there......lol
Mind you the Ralliart's came out with headers like the HM's
If like the redline area of the tacho, Paccies are great, the HM's will still flow better the cast manifolds, and the 0-100 times would be lucky to be 0.1 sec apart.
A lot like the HM's for the all round drivability.

Edit: More torque down low means being able to hold a taller gear for longer, = less fuel use over the life of the car.

If like the redline area of the tacho,

I could say the same to you about your grammar :P
So it wouldn't really matter what id pick cause there is barely a difference then? I think il look more into the high end of things fuel economy doesn't really.matter to me since I have bad fuel economy anyway

Yeah I know there are a million forums on headers.pacemakers and extractors I'm looking.to get full exhaust system for my tj Magna sports and was wonderong which one would be best to improve 0-100 times since that's all I care about thanks heaps

Go pacemaker headers if possible. Really good for up high power.

If you really want a good 0-100 time, convert to manual (free up some kW's) and/or change motors to 6G75 (30-50kW max power increase with train pulling ability from 3k rpm). 6G75 gives you the best of both worlds with low end torque and high end power, all the way to the 7k redline.

Go pacemaker headers if possible. Really good for up high power.

If you really want a good 0-100 time, convert to manual (free up some kW's) and/or change motors to 6G75 (30-50kW max power increase with train pulling ability from 3k rpm). 6G75 gives you the best of both worlds with low end torque and high end power, all the way to the 7k redline.

You can do that to my magna if you wan't ;), that's enough to get an AMC'er or two drooling.
Has any one Boosted the 6g75 in magna yet????
BTW Rick90, how fast did you want to make it?

I would think low and mid range torque would be better for 0-100 and general drive-ability providing it doesn't mess with your traction, although 2nd gear does have to rev fairly high to hit 100.

That's one of the reason i don't want to mess around with my manual Ralliarts exhaust too much, it has massive torque from 3-4.5krpm which makes it very easy to drive around quickly, and helps you use less fuel.

If you increase torque by alot buy some bloody decent tyres because otherwise you'll just tramp!!

If you increase torque by alot buy some bloody decent tyres because otherwise you'll just tramp!!

Agreed,
Good shocks and springs would almost be a bigger difference (than headers) for about the same money.

Save up, rob the piggy bank, get yourself a big bundle full Green coloured fun vouchers ($100's) and boost the damn thing!

I would think low and mid range torque would be better for 0-100 and general drive-ability providing it doesn't mess with your traction, although 2nd gear does have to rev fairly high to hit 100.

That's one of the reason i don't want to mess around with my manual Ralliarts exhaust too much, it has massive torque from 3-4.5krpm which makes it very easy to drive around quickly, and helps you use less fuel.

On a 3ltr box and 6G75, I can hit 100 in 2nd gear and still not hit the rev limiter

I like discussions about spinning you cams as fast as possible.

So iv been looking into changing my engine to the 6G75 which is the same engine in the 380 right? The only.problem I have with that is that the 380 0-100 times (7.5secs) are slower then the Magna sports (7.02secs) is that only because the 380 is heavier then the Magna or is the Magna engine just more aggresive?

Also I'm not very keen changing to manual I love driving manuals but some times I'm just to lazy to drive them the automatic is smoother aswell

So iv been looking into changing my engine to the 6G75 which is the same engine in the 380 right? The only.problem I have with that is that the 380 0-100 times (7.5secs) are slower then the Magna sports (7.02secs) is that only because the 380 is heavier then the Magna or is the Magna engine just more aggresive?
The 380 is heavier. It'll give you more power and torque and I can say from experience they make a Magna quicker straight off the bat, with more potential long term. Just depends on whether or not you can justify the expense.

The 6g75 goes into a magna well, for the weight of the car, and it loses all of the euro4 emissions compliance, oh, and more cubes.
Put pushing a 5speed with a 6g75, usually means you have put your hand up for a manual. All in good time.
One reason why I went the HM's, economy, drivability, reliability.
Start exercising that left leg. :)
No doubt the paccies are quicker, but you don't get to use them all time, if you stay 3.5, go the hm's slower but you appreciate it everyday, if you do go 3.8, give me a ride.

Well my dad is a mechanic and he had suggested the same thing putting in a 380 engine so the installing costs would be cheap it would also be good if I got an engine with lower kms my car is on 105000 ks so it would be good aswell what about insurance and is it legal in Victoria why would I need to make it a manual though?

I really can't see an auto lasting with 25% more power, it will for a while, fit a tranny cooler, and look after it.
I'm waiting for my box to die, but as I have a cooler and not as much power, despite the harsh treatment, its holding up alright so far, touch wood.

But wouldn't I be installing the gear box of the 380 which is designed for that power? Also if I did put the new engine would cruise control still work also would o have to upgrade breaks of anything else?

Brakes will be a good start, I think you need to to stick to the magna gearbox, your ecu wont run the 380 box, also your magna ancillaries, pumps, alt, throttle body, sump, coil, dizzy, etc.
Just the block and heads will be 380.

Just tell the guys how fast you want your magna, there is enough talent around here, they can tell you the mods, depending how quick you want it.

I really can't see an auto lasting with 25% more power, it will for a while, fit a tranny cooler, and look after it.
I'm waiting for my box to die, but as I have a cooler and not as much power, despite the harsh treatment, its holding up alright so far, touch wood.

Power has nothing to do with it. The extra 50Nm torque though will make no difference to gearbox. Apricot is running over 500Nm through his 5 sp auto

I'd say weight reduction would be the best start. I mean, it's a relatively economical starting point, until you go nuts with carbon fibre or fibreglass.

The executive models would be a good starting point, they're essentially the lightest variant.

Depending on how far you wanted to go with dropping weight you could shed 50kg. That 50kg weight loss is essentially a 5kw gain.

Apricot is running over 500Nm

WOW! Reckon he'd mind if I borrowed about a 100nm? I'm a bit short this week.

I really can't see an auto lasting with 25% more power, it will for a while, fit a tranny cooler, and look after it.
I'm waiting for my box to die, but as I have a cooler and not as much power, despite the harsh treatment, its holding up alright so far, touch wood.

Marty what were you thinking ..... :facepalm

Yeah, Yeah, and lets see how long it lasts. Life of the car lol I think not.

What, do you suffer from selective reading lol


I really can't see an auto lasting with 25% more power, it will for a while, fit a tranny cooler ( you've got a tranny cooler huh Rob), and look after it.
I'm waiting for my box to die, but as I have a cooler and not as much power, despite the harsh treatment, its holding up alright so far, touch wood.

Can't see em lasting without a tranny cooler and looking after it........ What s wrong with that.... Sheesh tough room.

Yeah, Yeah, and lets see how long it lasts. Life of the car lol I think not.

What, do you suffer from selective reading lol



Can't see em lasting without a tranny cooler and looking after it........ What s wrong with that.... Sheesh tough room.

lol yes we are here to make it tough for everyone as per your previous signature :P ...... yep tranny cooler is a must!

You'll like this.

Hey mate i recently had my gearbox reconditioned after a wave spring failure and a couple of other components. Its is the FWD box though. The place i used did a fantastic job and it was no where near as much as mitsu wants, the place is at Blacktown send me a PM if your interested.

Moving on.....

Haha you are funny scrappy il just lose 50 kgs now no worries some from what I'm reading I don't need to worry about.my gearbox all will be fine? If I did install the 6G75 motor would problems would I have? I think I might do that and a full exhaust system then see from there

I've got the 6G75 in my FWD, and For quick 0-100 times traction off the line is a huge issue (at least in a manual but maybe not so much in the auto with TCL?) so you need grippy as hell tyres.

If you go the 6G75, definitely fit the 380 front brakes as well, easy swap.

I'd steer towards the HM headers as well (especially with an auto), I'm very happy with mine. Bit dearer but better suited to daily street use.

For traction your suspension will play a big part so look at that.
Also the 380 front brakes add about 2.5kgs per side, so try and get some good lightweight wheels to help with unsprung weight (will help your traction a little as well as power to weight ratio), and fit the previously mentioned grippy tyres.

Then any other weight reduction helps.

Considering you already have the 5spd auto and you don't want manual, scrap that idea. There is not much difference between the 2 IMO. My 5spd auto is quicker but that's only because I was terrible at manual lol, on a good day the manual would only be slightly quicker.

The 380 motor will respond really well to new headers, I can't comment on HM but pacemakers made a huge difference to my 3.5 (6g74) so I'd take a guess and say you should notice a good difference also.

M4ddog u drive a ralliart which is from the start quicker then my tj spoorts so I'm defiantly leaning towards the 6G75 engine and then a full exhaust when u installed ur engine brett did u have any problems? Does cruise control still work? Also I don't really think tcl does much if anything it slows the car down I already have problems with traction now guess il look into tyers when I get my new find also how would suspension help on the grip?

M4ddog u drive a ralliart which is from the start quicker then my tj spoorts so I'm defiantly leaning towards the 6G75 engine and then a full exhaust when u installed ur engine brett did u have any problems? Does cruise control still work? Also I don't really think tcl does much if anything it slows the car down I already have problems with traction now guess il look into tyers when I get my new find also how would suspension help on the grip?

Have a look at his ride thread, it didn't start out as a ralliart that's for sure!

If you keep the standard Tj kit you can afford to lower the front of the car alot and the back a little too. (aka lows rear superlows front). This setup will help along with some good shocks. The rest would be in the tyres. Tyres are probably the single most important aspect of the car in terms of all forms of handling and grip.

Yes, Cruise Control Does still work, as does Traction (poorly)

Everything is bolt in, so there's no need for any custom fabrication

M4ddog u drive a ralliart which is from the start quicker then my tj spoorts so I'm defiantly leaning towards the 6G75 engine and then a full exhaust when u installed ur engine brett did u have any problems? Does cruise control still work? Also I don't really think tcl does much if anything it slows the car down I already have problems with traction now guess il look into tyers when I get my new find also how would suspension help on the grip?

Hayden is right, I have had the joy of owning my vehicle in all gearbox forms with the same physical mods, the 4spd auto is great if you like cruising and fuel economy, not so much for "sports feel". The 5spd auto will handle what you are proposing fine (a transmission cooler is definitely advised even on a standard engine, this is something i'm going to do when I get spare time). I'm fairly certain the 380 uses the same 5spd auto as the magna anyway.

A full exhaust system is most definitely needed to get the full potential out of the 6g75. No point paying 2k for a 6g75 and then choking it.