Exhaust Questions

UltraFlynn · 24th January 2007, 03:19 PM

I've now got a decat pipe for my 1st cat so I'm planning on getting a few other bits to allow me to fit it.

It raises a couple of questions:

1. What exhaust gaskets do I need when fitting this? Does anyone have a part no.?

2. What restrictor ring should I go for? 1.1 or 1.2? Where's the best place to get one?

3. What is a downpipe? Is that the same as the decat pipe I've got?

baz · 24th January 2007, 04:30 PM

1. as far as i know it just paste
2 chris wilson? what diameter is the pipe?
3 i think so. its the decat off the engine side, not the other

baz

Cass · 24th January 2007, 05:25 PM

I dont know if these will help Matt but these are threads the guy i bought my car from had posted.

http://www.mkivsupraownersclub.com/f...0079#post70079

http://www.mkivsupraownersclub.com/f...9564#post69564

~Rob~ · 24th January 2007, 06:30 PM

1. No gasket req.
2. id also say CW. Never heard of anyone else selling them. I think with a 1.1 RR, you can then up the boost with a BC if required.
3. A down pipe is the decat pipe which replaces the first cat, straight off the turbos.

The bolts on the turbo / CAT joint are a nightmare! i gave up and took mine into my local exhaust fitters. I just couldnt get them off!

UltraFlynn · 24th January 2007, 09:50 PM

1. That interesting as I had a conversation with Martin F at the weekend and he said he had some exhaust gaskets kicking around. This is my decat pipe, click here.
2. I know that CW does a 1.1Bar RR, and I think that Envy do a 1.2Bar as well.
3. Excellent. So I do have a downpipe. It's just that the US sites tend to refer to the 1st decat pipe as the downpipe and I was wondering what the difference was.

Rico2006 · 24th January 2007, 11:41 PM

You can get a gun based sealant instead of a gasket, worth smearing a bit of it about to get a good seal.

Restrictor Rings arent a science - ive got a 1.1b installed, and quite often get 1.2 and 1.3 on the peak hold. Whifbitz, CW, Ency all do em

~Rob~ · 25th January 2007, 09:51 AM

When my double decat was installed i didnt use any gaskets. Just cleaned the meeting faces of with some fine sand paper. Then again, there could be a gasket between CAT 1 & CAT 2?

Martin F · 26th January 2007, 10:10 AM

It's not strictly necessary to use a gasket, but guessing that the mating surfaces between CAT 1 and CAT2 are just a normal oval type then i have gasket that would probably fit. Use paste at the other end where CAT1 goes onto the end of the turbos as it's not a regular shape.

UltraFlynn · 26th January 2007, 10:34 AM

What kind of paste do I need then? Where do I get it from?

Martin F · 26th January 2007, 01:45 PM

Exhaust Assembly Paste.

The larger Halfrauds sell it, look around the area where they do exhaust hangers, gaskets etc.

24th January 2007, 04:30 PM	#2
baz stella monster None - Don't currently own a MKIV Supra. Join Date: Jul 2004 Location: wales Posts: 2,058	1. as far as i know it just paste 2 chris wilson? what diameter is the pipe? 3 i think so. its the decat off the engine side, not the other baz __________________

24th January 2007, 05:25 PM	#3
Cass Beer and more Beer Single Turbo - Auto Join Date: Aug 2006 Location: Inverness / Scotland Posts: 3,610	I dont know if these will help Matt but these are threads the guy i bought my car from had posted. http://www.mkivsupraownersclub.com/f...0079#post70079 http://www.mkivsupraownersclub.com/f...9564#post69564 __________________ "Freezing worms makes them easier to sharpen!"

24th January 2007, 06:30 PM	#4
~Rob~ Old Timer None - Don't currently own a MKIV Supra. Join Date: Jan 2005 Location: Bolton, Manchester, UK Posts: 1,476	1. No gasket req. 2. id also say CW. Never heard of anyone else selling them. I think with a 1.1 RR, you can then up the boost with a BC if required. 3. A down pipe is the decat pipe which replaces the first cat, straight off the turbos. The bolts on the turbo / CAT joint are a nightmare! i gave up and took mine into my local exhaust fitters. I just couldnt get them off! __________________ I used to be a Supra owner.. My Old Car

24th January 2007, 11:41 PM	#6
Rico2006 Supra Whore Jap Spec RZ - Auto (TT) Join Date: Oct 2006 Location: Norfolk Posts: 254	You can get a gun based sealant instead of a gasket, worth smearing a bit of it about to get a good seal. Restrictor Rings arent a science - ive got a 1.1b installed, and quite often get 1.2 and 1.3 on the peak hold. Whifbitz, CW, Ency all do em __________________ Rico. ---- 93 TT Auto, Blitz SUS Induction, Blitz NurSpec-R,Blitz V-Spec FMIC, AEM Tru-Boost, HKS SSQ, Double DeCat, Walbro and IK24's. Dare Hiro's 19"'s and D2 big brake kit. Yellow Pine Airfreshner

25th January 2007, 09:51 AM	#7
~Rob~ Old Timer None - Don't currently own a MKIV Supra. Join Date: Jan 2005 Location: Bolton, Manchester, UK Posts: 1,476	When my double decat was installed i didnt use any gaskets. Just cleaned the meeting faces of with some fine sand paper. Then again, there could be a gasket between CAT 1 & CAT 2? __________________ I used to be a Supra owner.. My Old Car

26th January 2007, 10:10 AM	#8
Martin F Administrator UK Spec - Manual Join Date: Aug 2003 Location: Essex, UK Posts: 10,226	It's not strictly necessary to use a gasket, but guessing that the mating surfaces between CAT 1 and CAT2 are just a normal oval type then i have gasket that would probably fit. Use paste at the other end where CAT1 goes onto the end of the turbos as it's not a regular shape. __________________ Martin UK6TT + Bits & Bobs 'Remember folks, the inside lane isn't just for Xmas' MSOC FAQ MSOC Members Discounts MSOC Resources

26th January 2007, 01:45 PM	#10
Martin F Administrator UK Spec - Manual Join Date: Aug 2003 Location: Essex, UK Posts: 10,226	Exhaust Assembly Paste. The larger Halfrauds sell it, look around the area where they do exhaust hangers, gaskets etc. __________________ Martin UK6TT + Bits & Bobs 'Remember folks, the inside lane isn't just for Xmas' MSOC FAQ MSOC Members Discounts MSOC Resources

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