JBA Headers
#12
02-25-2007, 08:43 PM
RE: JBA Headers
Yes that's where they plug in. This new procedure just started last year, the inspection stations had you get special equipment. I don't like it, it wasn't my idea, but it is what it is and the inspections stations MUST do it on 1996 and later cars and trucks. NYS has ways to check on them. The days of "buying' a sticker are over for OBDII cars. At least my station tells me, and I race with his son. I don't know exactly what you can do and still pass because I've never had a reason to, all my other cars that are modified are 1992 and earlier and a "visual" will get you by.
#13
02-25-2007, 09:29 PM
RE: JBA Headers
ORIGINAL: 2000BlazerSS
Swartz: The 4.3 is half of a 8.6 V8. Or for you, a 262 is half of a 524. Now if you had a 524 cubic inch V8 how big an exhaust would YOU run?. Or, if you had a 283 V8 would you run duel exhausts?. 2"?. How about this. Do you know how to find the area of a circle?. That's Pi times the diameter.
Add to that the fact your dumping thru your Y pipe into first a cat and then a muffler. Assuming you have a Blazer made after 1996 and/or live in a state that requires cats to be in place to pass inspection. BTW, in New York the inspection requires a 1996 and later car or truck with OBDII to be plugged into a phone line which goes to the DMV in Albany. But maybe your inspection station will give you a sticker without doing that. Hey, it's THEIR license that will get pulled if caught, and they'llpay the fine. My station will do a "visual" on a pre 96 but says I MUST plug in for my 96 and later cars/trucks.
A 3"SINGLE exhaust is not to big. You SHOULD have nailed me on the duels. In the case of a duel exhaust a 2" pipe, or 2 and a 1/4 is plenty.In that case your dumping 1/2 of a262 or 131 CID, not 1/2 of a 524 CID V8.
Swartz: The 4.3 is half of a 8.6 V8. Or for you, a 262 is half of a 524. Now if you had a 524 cubic inch V8 how big an exhaust would YOU run?. Or, if you had a 283 V8 would you run duel exhausts?. 2"?. How about this. Do you know how to find the area of a circle?. That's Pi times the diameter.
Add to that the fact your dumping thru your Y pipe into first a cat and then a muffler. Assuming you have a Blazer made after 1996 and/or live in a state that requires cats to be in place to pass inspection. BTW, in New York the inspection requires a 1996 and later car or truck with OBDII to be plugged into a phone line which goes to the DMV in Albany. But maybe your inspection station will give you a sticker without doing that. Hey, it's THEIR license that will get pulled if caught, and they'llpay the fine. My station will do a "visual" on a pre 96 but says I MUST plug in for my 96 and later cars/trucks.
A 3"SINGLE exhaust is not to big. You SHOULD have nailed me on the duels. In the case of a duel exhaust a 2" pipe, or 2 and a 1/4 is plenty.In that case your dumping 1/2 of a262 or 131 CID, not 1/2 of a 524 CID V8.
By using your own quoted equations... LMAO... I made it just a bit further than 6th grade and I was taught that the area of a circle was pi*radius*radius... pi*diameter is the circumference of a circle... So using the proper equation... You are recommending going from a stock size of 2.25" with ~4sqin of flow area to 3" pipe with ~7sqin of area. Yeah and this makes sense in who's mind? Maybe if you are reving them out to 7000+ rpm and have an engine built to make power there. On your own accord, you have stated that the 4.3L is gutless past 5000rpm so why bother with that large of an exhaust?
Open up the exhaust too much without building the engine to utilize it will be POINTLESS, period, the end. But hey, atleast you established that you can add 262+262=524.
Anyone that wants to listen to this guy go right ahead.
Oh and SS-boy, please learn to use the EDIT function, I'm sick and tired of cleaning up your consecutive posts which I have warned you about already.
#14
02-25-2007, 11:00 PM
RE: JBA Headers
I'm sorry,I thought to find the area of a circle you multiplied the radius x's 3.14. I sorry.
2.25 stock is 4 square inches
2.50 is...........5 square inches
3.00 is...........7 square inches
I figured anyone who would go to the trouble of putting on a set of headers and fabricating a set of headers might possibly do some at least bolt on modifictions to the engine.
Your opinion a 3" system is WAY to big, MY opinion is it's not TOO big but as big as you'd want to go. I also stated more than once that in MY case on MY car which is mostly stock I have a 2.5 system.
Next time you guys are at a parts store go to the exhaust department and pick up a 2.50 pipe and 3.00 pipe and see for yourself the difference. And your going to be using only one for 262 cubic inches.
2.25 stock is 4 square inches
2.50 is...........5 square inches
3.00 is...........7 square inches
I figured anyone who would go to the trouble of putting on a set of headers and fabricating a set of headers might possibly do some at least bolt on modifictions to the engine.
Your opinion a 3" system is WAY to big, MY opinion is it's not TOO big but as big as you'd want to go. I also stated more than once that in MY case on MY car which is mostly stock I have a 2.5 system.
Next time you guys are at a parts store go to the exhaust department and pick up a 2.50 pipe and 3.00 pipe and see for yourself the difference. And your going to be using only one for 262 cubic inches.
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