4 inch exaust?
03-16-04, 09:37 AM
#1
Senior Member
Thread Starter
Join Date: Jan 2003
Location: SC
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
4 inch exaust?
I now have a 3 inch exaust with no cats and a Rb muffler. My new turbo has a 4 inch outlet and Im wondering if I should run a 4 inch all the way to my muffler or just run it to my 3inch mid pipe? I would like to keep the RB muffler but if I go 4 inch I might need a 4inch muffler if thats even possible.
03-16-04, 11:16 AM
#2
addicted to lounge
There is a company that makes a 4inch exhaust....possibly HKS but don't quote me. I actually remember someone selling one on here not too far back. Possibly its still available. Might want to check the parts for sale section. I have the same situation you have. I am having a dp made that transitions to 3 inches. I've heard 4 inches is super loud and I'm not really into that
03-16-04, 12:07 PM
#4
Senior Member
Thread Starter
Join Date: Jan 2003
Location: SC
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
The dP is being made I can either make all the exaust 4inch or just the dp. I wish there was someone that has already been in my shoes and knows the best rout?
03-16-04, 11:23 PM
#7
Senior Member
Join Date: Jul 2001
Location: Sunny Trinidad & Tobago
Posts: 529
Likes: 0
Received 0 Likes
on
0 Posts
Hi Guys, I have a TRUST Japan Ti 4" Mid pipe and cat back.. it's LOUD AS **** ! i get headaches all the time .. it's really a pain sometimes, gotta' keep some Tylenol in the glove box all the time. The drone shakes the whole car !
Trending Topics
03-16-04, 11:27 PM
#8
Senior Member
Join Date: Jul 2001
Location: Sunny Trinidad & Tobago
Posts: 529
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by 93rotorhead
The dP is being made I can either make all the exaust 4inch or just the dp. I wish there was someone that has already been in my shoes and knows the best rout?
The dP is being made I can either make all the exaust 4inch or just the dp. I wish there was someone that has already been in my shoes and knows the best rout?
please PM me.
3G7
03-17-04, 10:34 AM
#11
Senior Member
Thread Starter
Join Date: Jan 2003
Location: SC
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
The turbo is a borge and warner ht-300 and Im shooting for around 600rwhp at 25-30psi. The turbo has made the power on a rotary before I just dont know if that was with a 4in exaust or not. I think Im just going to plumb my 4in dp into my 3in exaust and try that. To everyone running the 4in exaust what kind of muffler are you using?
03-17-04, 10:39 AM
#12
Senior Member
Thread Starter
Join Date: Jan 2003
Location: SC
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
I priced some mandrel stainless steel and It is suppose to be the best but the price was out of this world and if you are doing a exaust system with that I like to see a price? I wanted to make my manifold out of this but my funds were to low. I think we are talking about the samething.
Channon
Channon
03-17-04, 02:14 PM
#13
3rd motors a charm I hope
Join Date: Apr 2003
Location: Central New York
Posts: 2,054
Likes: 0
Received 0 Likes
on
0 Posts
i think you only really need 4 inch exhaust if you are making upward of 800 rwhp. If you are making 600 to the wheels and just use a 4 downpipe, you will be fine. Its not worth the extra ton of money for as little as 2-3 horsepower, if that. I guarentee you wont feel a differencen anyways. with 600 rwhp you got bigger things to worry about then more power. Traction is key.
03-18-04, 02:54 PM
#17
You've Been Punk'd
Join Date: Jun 2002
Location: Branson, Missouri
Posts: 4,727
Likes: 0
Received 0 Likes
on
0 Posts
03-18-04, 03:02 PM
#18
NorCal 7's Co-founder
Channon, I'm glad to see that your FD is about up and running. From all that I know the 4" DP and 3" exhaust will do you just fine for 600rwhp. Let me know if there is anything I can help you with. Sorry I couldn't find you a 20B in time. Though you never did PM me back. Laterz.
Zach
Zach
03-22-04, 06:28 AM
#19
Senior Member
Join Date: Jul 2001
Location: Sunny Trinidad & Tobago
Posts: 529
Likes: 0
Received 0 Likes
on
0 Posts
If anyone would host 2 small vids..you will hear how loud it is .. plus .. see the nice flamage.. I'd posted these vids before .. but lost the links..
PM me hosters..
PM me hosters..
03-22-04, 06:36 AM
#20
Senior Member
Join Date: Jul 2001
Location: Princeton, IL
Posts: 513
Likes: 0
Received 0 Likes
on
0 Posts
Quote: "Hi Guys, I have a TRUST Japan Ti 4" Mid pipe and cat back.. it's LOUD AS **** ! i get headaches all the time .. it's really a pain sometimes, gotta' keep some Tylenol in the glove box all the time. The drone shakes the whole car !"
Try the RX7 Store's resonated midpipe, it quieted my open exhaust to neighborhood-friendly, police-unsuspecting level. Just my 2cents.
Try the RX7 Store's resonated midpipe, it quieted my open exhaust to neighborhood-friendly, police-unsuspecting level. Just my 2cents.
03-22-04, 07:25 AM
#21
Rotary Enthusiast
Join Date: Nov 2003
Location: Canada
Posts: 814
Likes: 0
Received 0 Likes
on
0 Posts
Check out deisel shops. They specialise in large diameter mandrel bent exhausts, so are a great place to get bends and piping for realtively cheap compared to some of the name brand companies out there.
03-22-04, 03:04 PM
#23
Senior Member
Thread Starter
Join Date: Jan 2003
Location: SC
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
How about this Im thinking of staying with the 3in exaust but building in a cutout so I can run open exaust when I want? This way I can still keep the quiet 3in and have all the power of open exaust. I aslo need to know the best place the plumb wastegates back into the DP?
Thanks Channon
Thanks Channon
03-22-04, 03:31 PM
#24
Currently Winning
Join Date: May 2002
Location: Birmingham, AL
Posts: 2,438
Likes: 0
Received 0 Likes
on
0 Posts
If you're going to do that, why not have a 4" downpipe to the cutoff to the rest of the 3" system?
SPOAutos started a thread about cutouts, it should be further down in the single turbo section or possibly on the second page. It may be of use to you.
SPOAutos started a thread about cutouts, it should be further down in the single turbo section or possibly on the second page. It may be of use to you.