Posted ByDave SynderBasic Performance Upgrades. These modifications are: A full length three inch down-pipe (with or with-out high flow cats), 3″ (75mm) or bigger cat-back exhaust system, raised boost (18psi), and the required boost cut eliminator (GReddy BCC) needed to achieve that boost without activating the factory fuel cut-off at 14-15psi. These are the modifications that have proven to provide the best HP-to-$$$ ratio.
Our current engines are so inefficient that we literally burn our cash. The EPA would have a heart attack if you got rid of your catalytic converter recycling, and for a good reason. A large amount of our fuel is unused. Without a catalytic converter recycling you’d be pouring gas onto the street right out of your muffler. The catalytic converter recycling cooks all the unused fuel to improve emissions. Here’s how HHO nips that in the bud. The more efficient combustion while using HHO means less unused fuel. So much less that you don’t need your catalytic converter recycling, and your HHO emissions turn into water. This alone improves MPG and cleans emissions, but this isn’t the only benefit it gets better.
Basically you want similar plugs as stock, but a cooler heat range and a smaller gap. The stock plugs are NGK BKR6EP-11 (2978) and are platinum tipped and have a .044 (1.1mm) gap. The ideal NGK replacement for a modified Supra would be the BKR7E (6097). It is one range cooler (the ‘7’), is non-platinum tipped (the lack of the ‘p’) and has a smaller .0315 gap (lack of the ‘-11’). This plug is also called the NGK 6097 and they are fairly inexpensive. Platinum tipped plugs are not desired for high power applications, Iridium plugs are more preferred. Unfortunately their doesn’t seem to be a BKR8E which might be better for high-HP Supras.
There is also no truth to some motorcycle dealers telling you that you have to run their branded version of oil in your bike. Running an oil other than their branded version will not void your factory warranty. Do not get caught up in all the hype over private label oils. Do you really think a certain motorcycle manufacturer actually makes their own oil? Of course not, it’s put out for bid and the cheapest bidder wins so be careful using these types of oils.
It has the original recycle catalytic converters on it and I was wondering if this could be the problem. It does not have to pass inspection any longer because of its age and I thought about taking them off or replacing them.
However, this is not an easy job to some. Most of them do not unbolt the exhaust and they have to cut it using a saw or a cutting torch. It could be a bit difficult but with these simple steps you will be able to do this catalytic converter recycler simple task.
In 1992 the third generation RX-7 was introduced and the sales of the RX-7 stopped during 1995 when only a limited number of the Mazda RX-7s were shipped to the United States dealers for sale. Sales of the vehicle continued in other parts of the world until 2002.
For the same reason gunshots are loud, engine exhaust is loud. Sure, it might be cool to drive around on the street with that testosterone producing, chest-thumping, 150 decibel roar coming from your car… for about 5.3 seconds. Even the gentleman’s gentleman has got to use a muffler, or system of mufflers, on their exhaust.