mods Vs emission law --(MRMOPARMAN)

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

gday, im thinking about buying a gemini for a daily driver doubleing as a weekend autocrosser, but i noticed that gem's were only built after emissions laws started (and only got worse after that.

i was thinking of a TD or hopefully a TG.. how do you guys go with the law with webbers, extractors and all that sort of stuff??

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

Blatant disregard, hehe :)

No, seriously, I have just bought myself a TF and I plan on using my TX engine but I am not too sure on what I should do about the pollution gear as well.

I may attempt to fake the pollution system, and keep it there as a dummy, or register it as it is and at a later date put my good TX engine in. My only fear is if something goes wrong and the engine numbers don't check out, what do I do?

I would be interested in hearing what everyone does fto get around this.

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

The TX coupe comes in after ADR27 but manages to scrape in BEFORE ADR27A.

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

Ok, firstly, the only part of the emission gear which could cause any loss of power at WOT under load would be the air pump fitted to TF/TG geminis... So you have some choices, if you wish to leave it in place to appease rego/insurers then you can just remove the belt or if you are handy with a metal lathe, machine a new pulley to take a bearing... so that the pully just free spins...

As for the Exhaust Gas Recirculation, it doesn't function under full load only at nil/small throttle openings... but if you want to disable it (why?) then just make a thin plate (=/<1mm) to bolt between the inlet manifold and the egr valve and run two gaskets to prevent leakage.

The BIG reason that TE onwards cars make less power is that they have a 0.2:1 lower compression ratio and a 2mm smaller inlet valve.... You could go hunting for a TX-TD head, but my suggestion is to just find any gemini head (w/ or w/o the air injection ports so as to match you model) and have it rebuilt to those specs (bugger off, 9.5:1 static compression and 44mm inlet valves thanks) ... at most of my parts suppliers it costs me more for a decent small valve head than it does to have a large valve head's seats cut to take larger valves...

Most aftermarket extractors have the capability to fit the EGR pipe and therefore maintain legality, if they don't your exhaust shop should be able to modify to this effect.

As for a weber... hard to hide... but then it depends on your states laws... some states they just need to be tuned properly and maintain the crankcase ventilation piping and evaporative emissions control piping.

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

Hey Adam regarding the weber on the gem these are aceptable in all states as the ruling comes under a EPA legislatuion i think it no. 28
it states that all pollution gear must be retained if a non standard carby is fitted as this is easy as most of it plugs in to the manifold its self but the only prob is the aircleaner. This must be modified to look standard and this IS the ONLY WAY TO PASS THE PITS.

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

NSW law (im in ACT bugger) I was told by exaust shop...
EGR pipe after 10years is so tired and used it not needed to be on the car anymore.. No Shit.. U can rip it off and u "shouldt" get in trouble..

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

"As for the Exhaust Gas Recirculation, it doesn't function under full load only at nil/small throttle openings... but if you want to disable it (why?) then just make a thin plate (=/<1mm) to bolt between the inlet manifold and the egr valve and run two gaskets to prevent leakage."

This is correct, it opens at high vacuum situations like idling and cruising on highway. During these times, you want good throttle response and maximum fuel efficiency. Both of these are effected in a bad way by EGR, as this system replaces fresh clean air with already combusted exhasut gas, lacking in oxygen. You basically get less torque and therefore less fuel economy with this system operational.

It barely effects WOT, but it would have some effect, as the hot exhasut gas would heat the manifold a little bit, thus reducing the density of inlet charge. Thus, slightly less power.

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

Sounds like they couldn't be bother fixing yours, so they told you that. If an engine is supposed to have it, just becasue the unit is in bad condition is no excuse not to have it.

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

As afr as the aircleaner goes, it would not be looking standard is the issue, it would be emulating the standard units functions, such as the "summer/winter" heat stove switch, and the other gadjets in the main body of the air cleaner. Thus, it is simplist sometimes to simply cut the base of the aircleaner to make it fit a DVG.

old forum · hod rodder Joined: 04 Oct 2001 Posts: 15499

Yeah, the place I got my patrol RWC, the dude there races rotaries on flat track. Anyway, he's always getting customers with rotaries and shit, and one guy came in cos some part of his emission gear was screwed, he called a few places, then called VicRoads and basically said "Look, you CAN NOT BUY IT *ANYWHERE* It does essentially nothing anyway.", they basically told him, "stiff shit. no full emission gear, no rwc" The dude ended up selling the car to someone who wanted it for a drag car or something

Paul
Never late in a 308