hoov100 Posted March 29, 2006 Share Posted March 29, 2006 how safe is it to try and smog my 81 zx N/A with an 10.7 C/R and 105 gas? Quote Link to comment Share on other sites More sharing options...
AK-Z Posted March 29, 2006 Share Posted March 29, 2006 I wouldn't think that hard because they are suppose to test it in accordance to what year the engine was made and emmissions standards of that year. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 29, 2006 Share Posted March 29, 2006 The gas won't matter, if anything it probably has a lot of Tolulene and Xylene which should make it run cleaner. The high compression means you'll probably have a lot of NOx. Just go and have them do a PRE-TEST. Make sure they do a PRE-TEST. That way you'll know if its going to fail badly before they run it. If they run it as a regular test and it comes up as a gross polluter then you have to keep having it smogged every year for a couple years IIRC, real PITA. Quote Link to comment Share on other sites More sharing options...
Guest 280ZForce Posted March 29, 2006 Share Posted March 29, 2006 ummmm under the table....cuz u gotta love good ol' CA stupid smog laws Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted March 29, 2006 Share Posted March 29, 2006 Do you need 105 octane on the CR? Do you have any smog equipment? Mario Quote Link to comment Share on other sites More sharing options...
hoov100 Posted March 29, 2006 Author Share Posted March 29, 2006 i have all the euipment, but even with premium (93) i still get detonation with the timing set right. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 29, 2006 Share Posted March 29, 2006 This is for later, but you don't have to run 105 octane. You'd probably get away with 95 or 96 octane. So you mix the 105 1:1 with 91 (CA, right?) and that gets your around 95.5. That's a lot cheaper than 105 octane. Quote Link to comment Share on other sites More sharing options...
hoov100 Posted March 29, 2006 Author Share Posted March 29, 2006 i could always just get away with octane booster, as for the 105 gas, my freind uses it for his race car and gets a discount when he buys it. anyone now of a good octane booster? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 29, 2006 Share Posted March 29, 2006 No. Octane booster generally sucks. It's the right stuff, don't get me wrong, but the little bottle doesn't have enough of it to do much of anything. When they say that it raises your octane one point, they mean from 92 to 92.1. If you search online you'll find lots of home brews for octane booster using Tolulene and Xylene. I have used them with good effect. Don't bother with the little bottles of octane booster though. Same thing (check the bottle, they usually show what's in it), but $8 for 8 oz, vs $8/gal at the paint store. Quote Link to comment Share on other sites More sharing options...
hoov100 Posted March 29, 2006 Author Share Posted March 29, 2006 anyone have a formula. and what i need to make it? (im reasearching it on google) Quote Link to comment Share on other sites More sharing options...
Tony D Posted March 29, 2006 Share Posted March 29, 2006 Watch the failure rate on NOx. That compression with standard spark advance will make loads of NOx. Make SURE your EGR system functions properly, and that you have good riser and gallery cleanlienss. Any obstructions in the EGR riser, Valve, or gallery under the intake manifold can cause a failure on NOx---the good old days of turning the spark back a few degrees to pass are gone---more than a degree off and you fail! I agree, get a pretest before you do anything else. I have a car in the back yard right now that the guy sold because it got tagged "Gross Polluter" when it failed the NOx portion of the dyno test, as well as the functional test of the gas cap (cap missing, durrrr!). A needless tag, looks like they suckered him into the "cold cat test" where they don't adequately light the cat off before running the test. Car passed CO and HC, but failed NOx, could be an EGR riser plugged as well, but there was no need to get tagged "GP" on the test! Quote Link to comment Share on other sites More sharing options...
hoov100 Posted March 29, 2006 Author Share Posted March 29, 2006 got the car running smooth and holy sh!t does the exhaust sound orgasmic stock, anyone have the cam tower torque specs for a N47 head? Quote Link to comment Share on other sites More sharing options...
510six Posted March 31, 2006 Share Posted March 31, 2006 Several Union 76 stations in CA sell 100 octain unleaded.Or you could mix 4 gal of 91 with one gallon of tolulene and a quart of xylene (any paint store should have these items)put a couple of onces of ATF and a couple more onces of Mineral spirts for cleaning and lubrication purposes. Quote Link to comment Share on other sites More sharing options...
tec280zx Posted April 1, 2006 Share Posted April 1, 2006 My car passed with great #'s the last two times with 10:1 comp. I used 91 octane and set the timing to 6. You shouldn't need that high of octane, at least for the smog test. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.