RAPTOR SUPERCHARGER FOR LIB 3.0

Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Tradewind » Thu May 19, 2011 5:11 pm

No ideas on exhausts?

Hoping tuned car 2 has arrived back at it's home
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Brad88 » Thu May 19, 2011 6:00 pm

i have the centre muffler replaced with a hotdog and the rear mufflers changed to straight through ones.

im not sure who did it cause i bought the car this way.

im planing on getting extractors still iv had the flanges laser cut to suit just have to save to get the job done its not too cheap.
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Tradewind » Thu May 19, 2011 6:21 pm

Brad

What was your quoted price?

We should be able to get headers for around $800 a set made locally
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Brad88 » Thu May 19, 2011 6:52 pm

you have a pm:)

forgot to mention that the exhaust flanges are $100 for the two from Subaru, and couldn't find anyone else that sold them so i had to go genuine.
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby MH3.0R » Thu May 19, 2011 8:56 pm

Tradewind wrote:Brad

What was your quoted price?

We should be able to get headers for around $800 a set made locally


Now, what materials and specs are we talking for $800?
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby 3rspecb » Thu May 19, 2011 10:19 pm

Tradewind wrote:No ideas on exhausts?
Hoping tuned car 2 has arrived back at it's home


Yep and back out again driving in the real world bench testing some cars i could not beat when n/a.. How the tables have turned :lol:

WOW on the s/c whine.....
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby 3rspecb » Thu May 19, 2011 10:23 pm

Tradewind wrote:Brad

What was your quoted price?

We should be able to get headers for around $800 a set made locally



sounds good, keep me posted..
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Brad88 » Thu May 19, 2011 10:49 pm

my ones would be mild.

i dont want to start any arguments but i don't like stainless extractors.

and mine would be 1 and 5/8" primaries with 2" secondariness, the exhaust ports on the 3.0l's is pretty close to 1 5/8"
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Tradewind » Fri May 20, 2011 12:12 am

3rspecb wrote:
Tradewind wrote:No ideas on exhausts?
Hoping tuned car 2 has arrived back at it's home


Yep and back out again driving in the real world bench testing some cars i could not beat when n/a.. How the tables have turned :lol:

WOW on the s/c whine.....


Good thing

Enjoy, the H6 gets a few kills and a touch of street cred

The VE 6.0 kill surprised me to :D
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby MH3.0R » Fri May 20, 2011 8:31 pm

Brad88 wrote:my ones would be mild.

i dont want to start any arguments but i don't like stainless extractors.

and mine would be 1 and 5/8" primaries with 2" secondariness, the exhaust ports on the 3.0l's is pretty close to 1 5/8"


Ok, so this is not an arguement, but please explain..."i don't like stainless extractors."

Also seems that you have done some research on this topic. Can you provide us with the length at which the header primaries should be combined to the 2" secondaries?

Is there any point in running two secondaries for the full length to the rear mufflers instead of the single centre muffler and Y pipe?
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Brad88 » Fri May 20, 2011 10:50 pm

firstly is the cost of stainless, i know they last longer but there is a pretty big jump from mild to stainless.

stainless is more prone to cracking when there is rapid heat change, eg. driving when raining, hot pipes with cold water being splashed on them

exhaust gasses flow quicker when hot, thicker the pipe the hotter it will stay for longer so the gasses will flow quicker with ease. so im fairly sure that the mild exhaust pipe is thinker (not by much).

plus i know people may say they look better but in my opinion who cares its under the car there going to get dirty and what not as soon as you drive the car

stainless is stronger than mild but does not like to flex (why is doesn't like to have rapid heat changes) so in my opinion having a bit of flex is good for example if you happen to hit something with them, stainless has more of a chance to crack while mild would have a better chance of dinting then cracking.

these are my opinions and your free to have your own but this is just the way i see it.


as for the size, one of the ways how you can make extractors is to make each one of the primaries have smaller capacity (ml) the the capacity of the cylinder (ml). the theory with this is that when the gasses leave the primary (1) at the collector it will create a vacuum in the other primaries(2&3) thus sucking the gasses out of the other primaries causing there to be nothing to slow the gasses down.

these are what i have come up with and last time i talked about making extractors i had the usual reactions so mine will be this way they may work they may not but ill give it a shot :)

the ones i will be getting will be,

1 5/8" primaries at 295mm long
witch will give each primary a capacity of 394ml so that will create the vacuum
also the hole on the exhaust gaskets are 1 5/8" (could be 1 or 2 mm bigger or smaller) from memory.

then 2 200cell 2" cats

2" secondaries at what ever length is left to fill to connect to stock piping

anything will be better than stock anyway in my opinion.



on the full twin exhaust, there may be a benefit in it but i am not sure if there is or not i have read of people trying to change the exhaust size to stuff like 2.5" the splits into twin 2" so its like the stock but bigger and they have lost power, so it could make a difference but might take a bit of r&d. i have seen someone on here do it in a exhaust thread i think and he seemed happy. i personally wouldn't do it for the cost because it would be fairly expensive i would assume.

i have been thinking of changing the whole lot when i get the extractors or maybe even a bit after, but i would be changing mine to a single 2.5" system with a decent sized resonator and decent muffler just to give it a crisp note and not to loud whilst keeping it fairly straight thru, and if i don't like the look of a single muffler i would put a dummy one on the other side.

hope this helps :)
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby MH3.0R » Fri May 20, 2011 11:10 pm

Thanks Brad88,

I alrready have the Hitech mufflers and like the sound, so looking to optimise the remainder of the exhaust and get it ready for one of these kits.

I have seen a lot of commentary about the loss of torque if you make the diameter greater than 2.5 inches, but I think that is primarliy for the NA. If one of these kits is fitted, would a 2.75 or 3.0 inch still create teh torque hole until sufficient boost pressure is realised?
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Brad88 » Sat May 21, 2011 12:08 am

im honestly not too sure, i know you would benefit allot from extractors with a sc, i don't know much about exhausts for super chargers.

if you did want to change it you could maybe run the twin 2" the whole way.

or maybe 2.5" into twin 1 3/4" maybe?

thats why i want the single 2.5 :) so much easier hahah
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Kekotic » Sat May 21, 2011 12:32 am

Removed.
Last edited by Kekotic on Sat Jul 02, 2011 11:27 pm, edited 1 time in total.
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Re: RAPTOR SUPERCHARGER FOR LIB 3.0

Postby Tradewind » Sat May 21, 2011 12:46 am

So far I know if you want to run catalytic converters you must run exhaust grade stainless ie 400 series, mild steel pipe corrosion particles ruin cats very quickly

As for size it's a bit of a guess at this time but the following may be a guide based on my experience with V6 engines for single pipe, no real idea on twin but 2 x 2" would do.

Up to 200wkw - 2.5"

>200wkw - 2.75" slight loss of low end torque but will allow much better high end power by far.

I doubt there is any good argument for 3" at all


The stock manifolds may be very efficient for turbo set up, however I can't recall any car to date that had factory headers/manifolds suited to supercharging
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