hey guys i need some help with all my emissions and electronics. i would like to do away will the emissions and some electronics on my car. i have heard though that emissions acually increase performance in some cases, the reason being the dirty air putting back in the motor helps the chambers run cooler and there fore helps power. but the way i look at it, its just a bunch of junk getting in the way. does anyone have any sugestions to my problem. if so can anyone help me out with the ecm (computer) in the car and what it would affect if i removed it and the emissions. thanks yall. i own a 1986 camaro with a 73 block and heads. egr manifold. and all emissions excluding the heads. the original motor was the LG4 305 V8

 

Your "problem" is a vision problem. You can't see the forest for the trees.

Emissions-compatible equipment is available that will help improve the performance of your vehicle. Getting hack-happy will most likely reduce effeciency and driveability. Basic exhaust, ignition, and cam upgrades available will increase power and maintain the desireable aspects of the factory feedback system.

'73 factory 350 heads are an abomination. Your original '86 305 heads are much, much better.

 

ok so what you are telling my to keep the emissions on the car. if i buy aftermarket cylinder heads then to but the emissions version?

 

your egr valve like you said recirculates the exhaust gases thus improving performance also in way of a more complete burn in your cylinders when the car is in closed loop and like you said will cool your combustion chambers because the egr temp switch will monitor this

 

so when i'm buying headers for my car would it be better to buy edelbrock's TES with AIR tubes or hedman hedders tork stepped which i believe to be higher performance? would it be a big deal to plug the tubes not used if i put the non AIR tube headers on?


also i put a 350 in with everything from the 305 except heads, block, crank, rods, pistons (flat top), push rods, rockers. i put on a edelbrock performer plus cam, and performer EGR intake manifold. so what do yall think is the best thing for me to do?

 

Either type of header will work fine.

Heads aren't "emissions" or "non-emissions", necessarily. Some have the exhaust crossover, some don't. That's where the EGR gets the exhaust gases, not the A.I.R. tubes.

Your old 305 heads would be much better than '73 350 heads. Until you get rid of those heads, nothing else is going to make much difference.

 

well heres the combinatins i'm looking at, heads are the edelbrock PerformerRPM, or the Performer which is listed as heat crossover for emissions. like i said with the headers the edelbrock TES or the Hedman tork stepped.

what i am thinking about is getting the heads with heat crossover with the hedman headers without AIR tubes. would this be a setup that would work well? and could you tell me what exactly is the hest crossover, is it like a passage to let warm air rise to the EGR?

 

The exhaust crossover is a passage between the center two intake ports that goes over to one of the exhaust ports. Originally, it was used to warm up the bottom of the intake manifold when the engine was cold by closing off a valve on the outlet of one exhaust manifold (the "EFE" valve), forcing exhaust through this port, through a passage built into the intake manifold, and out through the same port in the other head. As the engine warmed up, the EFE valve opened up and the exhaust flowed "normally". This system was kept by the factory up through the last model of carbs. When emissions reductions were mandated, the factory discovered "EGR" - and used the crossover passage as the source for the exhaust gases needed for the EGR.

If the head you choose doesn't have the crossover passage, the exhaust can be routed up from the header to the intake manifold. Typically, the only time you mess with it is when you need to comply with emissions inspection/testing (although it is a federal requirement). Some aftermarket heads can be drilled to provide the EGR gases. It's up to you which way you want to go.

 

ok everyone thanks alot with your input. i think that i will set a goal to save enough money to buy the edelbrock performer heads with 64 cc chamber. should i get the angled plugs or straight? i think straight plugs work better with headers?