Civic exhaust... which diameter is best??
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Joined: Nov 2001
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From: Racine, WI, USA
Civic exhaust// B series vs. D series// does this make sense to anyone else??
Part of my exhaust, is still stock piping on my '99 civic hatch. I've always heard that 2 1/4" piping was the best size to use on civic... What is the stock size? Should I go to 2 1/4"? I'm going to install a supercharger in about 2 months, would this change anything? Right now I have DC ceramic 4-2-1 headers , EX cat, and then some stock piping, and then aftermarket muffler... I'm thinkin that i should go with 2 1/4" and then leave it... Sound good?
[Modified by c_spec, 12:13 PM 12/1/2001]
[Modified by c_spec, 12:14 PM 12/1/2001]
[Modified by c_spec, 12:13 PM 12/1/2001]
[Modified by c_spec, 12:14 PM 12/1/2001]
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Re: Civic exhaust... which diameter is best?? (c_spec)
if your going to add a supercharger i suggest you change your headers and your exhaust piping. the ones you are using will be too restrictive. i suggest getting a header that uses a 2 1/2 collector (kamakazzi, jdm itr, jdm dc etc) and changing your piping to 2 1/2 as well.
Re: Civic exhaust... which diameter is best?? (c_spec)
do you still have the stock motor? if you do then don't waste your time on putting a supercharger, you will regret it.
people say 2.25 is good for mild to medium performance then you should step up to 2.5
people say 2.25 is good for mild to medium performance then you should step up to 2.5
Thread Starter
Joined: Nov 2001
Posts: 1,770
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From: Racine, WI, USA
Re: Civic exhaust... which diameter is best?? (xlr8si)
do you still have the stock motor? if you do then don't waste your time on putting a supercharger, you will regret it.
Everything seems quite similar, and not worth the $2000 + all the work to swap...
Am I wrong thinkin this?
I'm not going to drag race this thing, probably a few times a year, but really it's my daily driver. honda's make high horsepower But not as much torque;
I think a supercharger would be perfect. I need stoplight to stoplight power, right away, not tryin to take off and then finally getting boostat like 3000 rpms... not to mention that the JR supercharger has a bypass function, that will help protect from running boost all the time. Plus, is CARB exempt. I have not found 1 turbo kit that will 50 state legal. People tell me that there turbo kits have been known to pass emissions but are not exempt. Around here, the smog guys dont' do the tail pipe routiine anymore, they just plug right into your computer and then gett a reading there, and I KNOW when they see that setup , they will tell my 'take it off'. which blows!!
My idea was to put on that supercharger, mill the head slightly to raise my compression closer to the SI level, and maybe have the head ported and polised, also use JR's boost upgrade kit which will help me achieve a little higher boost, Then add a higher grip clutch, and lightweight flywheel.
I'm not looking to make this the FASTEST thing on four wheels, but get up and go, maybe , maybe get to the 5.0 guys level...
Anyway, tell me if this makes sense to anyone else...
later
Re: Civic exhaust... which diameter is best?? (c_spec)
do you still have the stock motor? if you do then don't waste your time on putting a supercharger, you will regret it.
I dont' understand why I would regret it? I mean, I don't understand why I should swap really. The B16 has 111 ft-lbs. of torque and my D16 has 103 ft-lbs. Yeah, the B series has 160 hp but also has 10.6:1 compression compared to my 9.4:1. I mean, why should I switch to DOHC? They both still have 16 valves; it's my understanding that I could just tune the intake and exhaust vavle timing independantly(B16) instead of together(D16)..
Everything seems quite similar, and not worth the $2000 + all the work to swap...
Am I wrong thinkin this?
I'm not going to drag race this thing, probably a few times a year, but really it's my daily driver. honda's make high horsepower But not as much torque;
I think a supercharger would be perfect. I need stoplight to stoplight power, right away, not tryin to take off and then finally getting boostat like 3000 rpms... not to mention that the JR supercharger has a bypass function, that will help protect from running boost all the time. Plus, is CARB exempt. I have not found 1 turbo kit that will 50 state legal. People tell me that there turbo kits have been known to pass emissions but are not exempt. Around here, the smog guys dont' do the tail pipe routiine anymore, they just plug right into your computer and then gett a reading there, and I KNOW when they see that setup , they will tell my 'take it off'. which blows!!
My idea was to put on that supercharger, mill the head slightly to raise my compression closer to the SI level, and maybe have the head ported and polised, also use JR's boost upgrade kit which will help me achieve a little higher boost, Then add a higher grip clutch, and lightweight flywheel.
I'm not looking to make this the FASTEST thing on four wheels, but get up and go, maybe , maybe get to the 5.0 guys level...
Anyway, tell me if this makes sense to anyone else...
later
I dont' understand why I would regret it? I mean, I don't understand why I should swap really. The B16 has 111 ft-lbs. of torque and my D16 has 103 ft-lbs. Yeah, the B series has 160 hp but also has 10.6:1 compression compared to my 9.4:1. I mean, why should I switch to DOHC? They both still have 16 valves; it's my understanding that I could just tune the intake and exhaust vavle timing independantly(B16) instead of together(D16)..
Everything seems quite similar, and not worth the $2000 + all the work to swap...
Am I wrong thinkin this?
I'm not going to drag race this thing, probably a few times a year, but really it's my daily driver. honda's make high horsepower But not as much torque;
I think a supercharger would be perfect. I need stoplight to stoplight power, right away, not tryin to take off and then finally getting boostat like 3000 rpms... not to mention that the JR supercharger has a bypass function, that will help protect from running boost all the time. Plus, is CARB exempt. I have not found 1 turbo kit that will 50 state legal. People tell me that there turbo kits have been known to pass emissions but are not exempt. Around here, the smog guys dont' do the tail pipe routiine anymore, they just plug right into your computer and then gett a reading there, and I KNOW when they see that setup , they will tell my 'take it off'. which blows!!
My idea was to put on that supercharger, mill the head slightly to raise my compression closer to the SI level, and maybe have the head ported and polised, also use JR's boost upgrade kit which will help me achieve a little higher boost, Then add a higher grip clutch, and lightweight flywheel.
I'm not looking to make this the FASTEST thing on four wheels, but get up and go, maybe , maybe get to the 5.0 guys level...
Anyway, tell me if this makes sense to anyone else...
later
Thread Starter
Joined: Nov 2001
Posts: 1,770
Likes: 0
From: Racine, WI, USA
Re: Civic exhaust... which diameter is best?? (xlr8si)
well getting a supercharger will give almost the same amount of power as swaping in a motor, you can't raise the compression when you put on the charger you need to lower it so milling the head is out of the question plus swapping out a motor will give you more potential to get more power out of it than supercharging your stock non vtec motor
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From: Butler, PA
Re: Civic exhaust... which diameter is best?? (c_spec)
2 1/4" should be fine for you and a SOHC supercharged application and it's the most available too. 3" is more common for turbocharged motors.
As far as the supercharger question. A B16 motor w/ Vortech supercharger runs 277hp on stock internals (including that 10.2:1 compression). Don't worry about compression with superchargers unless A) it's over 11:1 w/ 7 or so psi or B) it's over 9:1 w/ 12psi +. This is on stock internals mind you. Get the compression to EX levels (or swap in the EX motor, which is cheap and you get VTEC
) and you will be very happy with the results of supercharging the motor.
As far as the supercharger question. A B16 motor w/ Vortech supercharger runs 277hp on stock internals (including that 10.2:1 compression). Don't worry about compression with superchargers unless A) it's over 11:1 w/ 7 or so psi or B) it's over 9:1 w/ 12psi +. This is on stock internals mind you. Get the compression to EX levels (or swap in the EX motor, which is cheap and you get VTEC
) and you will be very happy with the results of supercharging the motor.
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