Date: Sun, 30 Nov 2003 18:07:39 GMT
From: Paul Halliday <>
Subject: Re: Turbo Hose (Intercooler to Throttle)

in article, Grunff at wrote on 28/11/2003 22:49: > Paul Halliday wrote: > >> I've done some measuring. The bore of the rubber connector hose going onto >> the intercooler is about 60mm and the bore of the rubber connector hose >> going over the throttle is about 70mm. The metal pipe, however is just over >> 60mm at the throttle end and a miniscule 40mm at the intercooler end. The >> rubber connector pipe actually steps up from that small bore to 60mm. What a >> waste! Surely some kind of pipe that curves from 70mm to 60mm in one go >> would be ideal. Would it really be that beneficial? > > 40mm is very narrow - I've never owned an intercooled 8vT, so > can't actually picture it - but it sounds a little tight. The rubber section from the intercooler actually steps down from 60mm to about 50mm (to take the OD metal pipe). 40mm actual bore in the metal pipe does sound very restrictive. .html This link shows my engine. The pipe with "turbo intercooler" written on it is the 40mm ID pipe. The rubber throttle connector pipe is 70mm ID and the intercooler end has the bore step-down connector pipe. The other pipe from the turbo to the intercooler is also metal; presumably 40mm ID as well. I was thinking of replacing this one as well with a wider bore setup. > Whether making it bigger would make a difference, I'm not sure. > IME restrictions like this matter a lot less on turbo engines > than on NA ones. Okay? Presumably, the turbo can push a lot more air than the throttle/engine can gulp even if there is a 40mm pipe in the way :) > Having said that, I think if it was mine I'd be tempted to give > it a try. Shouldn't be too difficult to do. Not difficult. I think I can make it up out of parts pretty much any Motorsport shop. Just relatively expensive. Samco & SFS both make turbo silicon (to withstand both pressure and temperature). What is the temperature that generally comes out of the end of a standard SAAB 900 intercooler? Paul 1989 900 Turbo S

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