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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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Mar 30th, 2020, 07:05 | #21 |
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That’s an excellent question, I don’t know. Certainly at least cat back, I assume I will need to measure the diameter of the down pipe to see whether it is 2.5” or 3”?
I assume that the mods can be undertaken in stages? Looks like an intake kit and RIP could be done initially, perhaps then a larger inter cooler and finally a change to Motec 4.4 and a map? |
Mar 30th, 2020, 09:29 | #22 |
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I have the SNABB intake pipe on the Gul, forgot about that, it’s a good mod but fit wasn’t great. A lot of mucking about to get it fitting right.
If you’re changing the downpipe, you may want to change to an angled exhaust housing at the same time. |
Mar 30th, 2020, 11:03 | #23 |
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I do currently have a straight turbo exhaust flange. What are the benefits of an angled flange? My down pipe (after the flexible) looks to be 2.5 inch - is that likely to be stock?
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Mar 30th, 2020, 11:30 | #24 |
Volvo Nutcase
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The genuine Volvo angled flange downpipes are 3 inch initially going down to 2.5 inch after the cat which means you don't need to change the remainder of the exhaust system.
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Andrew 1998 S70 T5 CD AUTO Previously a 1990 240 GLT-R |
Mar 30th, 2020, 12:04 | #25 |
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OK, thanks. Looks like my ‘performance’ stainless exhaust is cat back only, so bigger down pipe looks like one of the first mods I need.
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Mar 30th, 2020, 12:06 | #26 |
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Is the angled turbo exhaust required just to allow for an OEM down pipe or are there other performance benefits associated with it?
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Mar 30th, 2020, 12:57 | #27 | |
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When I upgrade my turbo to the 18g I'll have to go to angle flange, at the same time install my japifold manifold. |
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Mar 30th, 2020, 12:59 | #28 |
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Also your downpipe is 2.25 I believe. When you remove it you'll see how restrictive it is.
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Mar 30th, 2020, 13:12 | #29 |
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So if I need a bigger downpipe what do I do about the cat that I have fitted? I think most remove the cat? Does that become the restriction if it remains or are high-flow cats available? It sounds as though a 16t turbo will be big enough for my needs, so can I stick with a straight turbo exhaust flange and install a bigger downpipe onto it?
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Mar 30th, 2020, 18:32 | #30 | |
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But shemtek or Tim Williams will advise you. But what I found is; that key is the overall condition of your engine. I service my car every 3 to 6k using 10w60 oil. |
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