11-21-2012, 12:09 PM
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#2
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
Originally Posted by tingboy
Hi,
Been quite awhile since I've been here, and lo-and-behold, my login still works! 
Background: I've had my 1997 MKIV NA for awhile and (10 years), and now want to upgrade to a turbo (not engine swap to GTE). So, i'm doing as much reading and researching as i can to mitigate any risk(s) involved etc. I want the build/upgrade to be as "seamless" as possible. Sort of a plug in play. Having said that, I'd like to keep everything intact - my catalytic converter to be specific. i know i know, not very smart if i want to go turbo since exhaust needs to be expelled quicker, however, i really don't want to deal with the hassle of taking everything apart every other year (smog check), or dealing with getting pulled over and getting a ticket for a failed visual inspection etc.
Question: Will the back pressure from keeping the cats in any way would harm the engine/turbo?
I looked around on several sites during research and could not find a clear answer. The subject seems to go off in a tangent with people stating what they should and should not do instead of whether or not it would actually cause damage. maybe because it won't? figured there are a few experts here and would try my luck.
Thanks in advance!  |
No, it'll just slow the turbo spool-up, and reduce maximum boost. The oem twins on an Mkiv TT last just fine with cats, right?
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.
NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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