[2stroker]

Mike I can see what you are saying in this - I am still struggling to convince myself that the local exhaust shop can do more better than a team of prefessional automotive design engineers in Tokyo. and I have had this discussion before however when any vehicle is designed and manufactured there are many compromises made. The exhaust is but one of those compromises, as well as being made to work on the engine it is also designed to meet the requirements of the pollution control and noise requirements of countries around the world. It compromises performance to meet those other rquirements. When designing a car the engineers have a draft that they have to work within which will include, cost, size, weight, asthetics, fuel efficiency, performance, comfort etc etc etc.

Its a bit like saying if a Jimny neeed spotlights headlights the engineers would have fitted them, or the standard tyres fitted to a Jimny from the factory were picked by the design engineers so they must be the best possible tyres for the car, or the original seats in the Jimny are the best seat that could possibly have been fitted, or you can not improve on the factory sound system in the Jimny because the engineers decided that it was the one that best suited the Jimny, or an Jimny does not require a bullbar because the engineers would have incororated it into the original design.

I do however agree that just throwing a set of extractors, a bigger pipe and a random muffler on may actually make the car worse not better, like anything it is going to be trial and error, limiting the error will have everything to do with finding a skilled and knowlegeable exhaust shop that actually has experience in performance exhausts.

[Bugsta]

And one of the most important factors, relating to exhaust is noise. Most drivers want and the government mandates that it not produce excessive noise. Our roads would be unbearable if every car was like ours!

[zukenutter]

Mine is quiet and I love it that way. Was sooo over noisy exhaust, must be maturing... finally.

[JrZook]

Bugsta wrote:

Our roads would be unbearable if every car was like Mine!

Those dyno results are pretty funky and are very hard to go by but have look at the low down torque figures at 55KPH. First one is ~68ft-lbs and after the exhaust it's ~88ft-lbs. That is a hefty increase and surely would be noticeable in the increased drive-ability of the vehicle and acceleration. Not necessarily the top end speed.

[Bugsta]

If you are going to quote me, quote me. Don't change the wording.

I am not the only Suzuki with a non standard exhaust.

[zukenutter]

^^

[dougies_tx5turbo]

thank you for the great information yous guys have been giving me, just have a few more questions. i understand that when putting an exhaust on you do lose a tiny bit of power in some area's while driving. in my families past we have done alot of mods to alot of different cars and when considering putting an exhaust on we always go to the same person, who's been doing exhausts for atleast 15 years that i know of, so the car will be going down to Les at fatpipes at petrie to find out whats suited to the car and what i need it for. the transfer case is not going to happen because it will wreck my highway driving. the whole purpose of me selling my sierra to buy a jimny is to try to have a perfect all rounder that can do camping trips with the family, cruise on the beach, and do some trails and at the end of the day the missus can get out of the mazda 2 and jump into the jimny and not have to worry about driving a 30 year old sierra. so back to the topic

Quote:

Bugsta wrote:


dougies_tx5turbo wrote:

first off ive got a 2005 model jimny vvt manual with 82,000km.

what is the biggest legal tyre you can put on a jimny?

when i was into sports cars i thought you could legaly go up 2 sizes as long as its only 20mm bigger in rolling diametre, so i would think it would be the same for all cars, is this true for 4x4's?

Quote from TMR Modifactions PDF... The rim diameter may be varied from the standard size but the overall diameter of the tyre must not vary by more than +15mm or -26mm.

Doesn't allow much. Even going from 205/70 to 205/75 is a 20mm increase.

dont mean to be rude but i still dont understand what the biggest legal tyre is i can fit on a jimny. hopefully queensland transport department can help me out with this next week.

Quote:

does the vvt have the same extractors as the 2004 m series motor?

Not sure on this one. I think the block is effectively the same.

can anyone verify that the 2000 plus m series model is the same extractors as the vvt m series model?

Quote:

will the older model rear tail shafts be a straight swap?

Should be. I have installed an MII in my MIII

its good to know that i can replace my warn out back cv tail shaft for the series 2 model rear tail shaft. (does anyone know of anyone selling one?)

Quote:

The Jimny 4WD buttons require a 4 second press and hold so thats not an issue. I installed a high flow air filter and extractors. I think it helped a little.

thats good to know about the 4 seccond push. would this be the same for the auto hubs? or do they just go on sraight away when you press it? got manual hubs to do the conversion, just need the rings and bolts now.
to the modifications to the engine ive already done a cold air induction,i have already replaced the air filter but i will look into getting a k&n or a uni filter not these crap pod filters that only really work on sports cars when they are boxed in, in a growler box. if i can get one of these for the jimny it would be sick but very unlikely they would make one for a jimny.

Quote:

Sounds like you have the time, so you could look out for a m16a from a (06?) GV. Rare but they are around. Will cost you a lot more than a m15a though. I have heard of a few people recently doing an m18 upgrade successfully. Some on this forum.

if i can find a low k's m16 i will buy that instead but it looks like the m15 will be alot cheaper and better in the long run and not to much of a power increase because i dont want to be breaking stuff that shouldnt be getting broken, but hey money talks.

[Bugsta]

Its simple calculation. There are many tyre size calculators on the net. I like this one...
http://www.exploroz.com/Vehicle/Tyres/SizeCalc.aspx
The orignial size is a 205/70/15, which makes the diameter ~668.5mm. Therefore the largest diameter legal diameter is ~683.5mm. Going to a 215/70/15 is your closest option at 682mm. I have yet to be hassled about my 29's.

The 4WD is a 4 second delay to activate 4WD, and hubs, so that you can't just knock it in by accident. Converting to manual hubs will void this discussion anyways. You will need to block the vacuum hoses to avoid an ECU error and a flashing 4WD dash light. I started with a couple of small bolts in the end of the rubber hoses, and later some rubber end caps on the stainless pipes. You might also like to loop one of the removed hoses across the 2 hub vacuum connectors (around behind the brake mount to keep dirt out. You will also need to turn down the outer ring of the hub locking nut to allow the new FWH's to go on. Depending on the ones you have, and assuming you have standard Jimny axles, you may also need to remove the circlip or it will foul and not allow the hub to push on completely. My AISIN hubs needed it removed.

I found a foam UNI Filter for the Jimny.

An m15 is a safe upgrade. Plenty of them around. A couple of Suzi wreckers on the Gold Coast do them. Also check eBay, Gumtree and maybe Swift forums for recently wrecked vehicles.

[Bugsta]

Oh, as for gearing. You nay have read on other threads that there is other options but expensive. To keep High and alter only low, there is an APIO 58 Star, which reduces only low by 58%. Will cost about $1,000 + fitting. There is also a 20% high/low reduction but don't know which cases thats available for.

edit: Sorry, the APIO gears will cost you around $2,000+fit. The trialjimny 20% hi/lo option is around $1,000+fit

[Bugsta]

LOL @ blue flames. Crikey, Somethings gonna give!

I don't understand how you get 22% in high. Is that a known reduction, a calculation based on rev/road speed ratio change or something else? I assume it was a 1:1/2:1 box originally? Every spec sheet I have seen says the Auto box is 1.3:1/2.6:1. being 30% in both. I would love if your findings are correct though.

[Bugsta]

My plan on paper is for 32's and the auto T-case. I am also considering going to 4.09 diff centres if need be which will bring it back ~9%

Do you find the 4100 bearable?

[BertZook]

Bugsta wrote:

Do you find the 4100 bearable?

thats how non-vvt jimnys cruise when stock

[squibby]

dougies_tx5turbo wrote:

can anyone verify that the 2000 plus m series model is the same extractors as the vvt m series model?

I can't verify, but I do know this, - Usually Aftermarket Headers for M-series fits All M13's from 2000 onwards, Both non-VVT and VVT Jimny require 02 sensor in the header.

SO while I can't swear hand-on-heart that they are the same, I would am 90% sure that they are at least interchangeable, and yeah they are probably identical.

[squibby]

drewmouli wrote:

Bugsta wrote:

My plan on paper is for 32's and the auto T-case. I am also considering going to 4.09 diff centres if need be which will bring it back ~9%

Do you find the 4100 bearable?

I find the 4100 RPM amazing, thats the peak power output of the M18, it just takes off straight to the limiter in 5th for over taking. chews a bit of fuel, but acceleration is good, stopped burning my clutch up

I like copying Drew, and he doesn't talk rubbish with regard to these things. I fitted my M18A based on his recommendations and no regrets at all. I'll definately be trying out the Auto transfer box eventually

[Mike57]

Just a note on the headers. On the later VVT Jimny's conforming to the Euro 4 emmissions (2008 onwards I think) there is an extra pipe from the fouth port which I think is part of the EGR system. For the later model Jumny's the headers have this additional pipe on them. I might be wrong about what it is for but they are definitely different to the earlier ones.

[squibby]

Mike57 wrote:

Just a note on the headers. On the later VVT Jimny's conforming to the Euro 4 emmissions (2008 onwards I think) there is an extra pipe from the fouth port which I think is part of the EGR system. For the later model Jumny's the headers have this additional pipe on them. I might be wrong about what it is for but they are definitely different to the earlier ones.

He's talking about the extractors - exhaust manifold, not the intake manifold. So EGR isn't an issue - EGR bypass is Head to intake manifold on a Jimny where equipped. (all australian M13 VVT jimnys)

[Mike57]

OK so its not the EGR then but there is an extra pipe on the extractors for the later model engines. It is on the standard exhaust manifold and the extractors need to have it as well.

[monley]

Bugsta wrote:

My plan on paper is for 32's and the auto T-case. I am also considering going to 4.09 diff centres if need be which will bring it back ~9%

Do you find the 4100 bearable?

Sure it's not 6%?

Non-vvt g-box, sierra t-case with 4.16 gears (12% reduction in high) and 4.09 diffs, makes it rev at 4100RPM doing 100kph. According to zukenutter, that has given me a total reduction of 22% in high, same as Drew

As for the extractor's - VVT jimny's need that little pipe coming from the EGR valve into the hear
ders, other wise it will chuck a engine light

[squibby]

Mike57 wrote:

OK so its not the EGR then but there is an extra pipe on the extractors for the later model engines. It is on the standard exhaust manifold and the extractors need to have it as well.

ah ok, I know what you are talking about now. Yeah it is part of EGR. It's feeding exhaust back into the head via the little 5th branch that you are talking about. The other end of this route via the head pops out the back of the engine to the EGR valve where equipped. Where not equipped there is a blanking plate at the back of the head. I still don't think the stock manifold is different between non VVT and VVT M13. For one, they haven't replaced that page in the workshop manual between the two model. But deffor worth making sure you got the 5th little branch on any aftermarket manifolds if you have an EGR equipped M13.

[dougies_tx5turbo]

this is the info i wanted to hear. thanks. these are the ones im looking at getting, they have that 5th little branch that your talking about. do you reckon these would work? or does anyone have extractors on their vvt model that could take a picture to verify it?
http://www.ebay.com.au/itm/SUZUKI-JIMNY ... 3cc2eaa78f

[Mike57]

I don't have extractors on my car but these look to be the correct ones.

[squibby]

Yeah mate, they look good to use. Got the Bung for the O2 sensor and the fifth little branch so good for any M-series engine in a jimny. On the negative side though, they still look a bit crap tbh the way the bends are pinched, but I don't know much about exhausts.

[Bugsta]

They look right, but I gotta agree about the bends. They look compressed and may restrict the flow.

Also, I suggest getting the installers to put a flange at the end and before the CAT. It makes working on the engine and tranny more difficult than it has to be if you can't remove the headers.

[zukenutter]

Bugsta wrote:

They look right, but I gotta agree about the bends. They look compressed and may restrict the flow.

Also, I suggest getting the installers to put a flange at the end and before the CAT. It makes working on the engine and tranny more difficult than it has to be if you can't remove the headers.

x eleventy million

Also I thought the science behind extractors was to have the four pipes an equal length, that looks very random to me.

[dougies_tx5turbo]

Bugsta wrote:

They look right, but I gotta agree about the bends. They look compressed and may restrict the flow.

Also, I suggest getting the installers to put a flange at the end and before the CAT. It makes working on the engine and tranny more difficult than it has to be if you can't remove the headers.

this will be all soted out when i do all the modifying to the drive line. more questions posted about my drive line options. thanks Doug.