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TR8 Questions

To: "levilevi" <>
Subject: TR8 Questions
From: Dave Massey <>
Date: Sat, 11 Jan 2003 18:37:26 -0500
Cc: "Triumphs" <> id h0BNfqRO011500
Message text written by "levilevi"
>Which makes more HP, torque, fun?  A TR8 with fuel injections, with ZS
or a Holley 4 barrel with the Offy manifold?  And how much HP?  Mileage for
each setup?  Maybe that's too obvious but I'd still like to hear opinions,

Bud, few Triumphs take to tweeking like the TR8.  This is because the
performance of the TR8 is so compromised in the effort to meet the
emissions requirements.  In stock form the fuel injected and the
carburetted versions are essentially equivalent.  Dropping on a four barrel
carb is said to improve horsepower but I don't know by how much.  Most
likely because those who swap carbs do otherthings as well.

Ted S. has said that the TR8 is one of the few (or the only) Triumph that
really benefits from fitting up headers and if you look at the TR8 exhaust
manifold you'll see why.  I suspect that if you swap out the carb and the
exhaust manifold you will realize approximately 175 HP (as opposed to 137

Since the Rover engine has benefited from 20 years of further development
you can swap out the engine for a more recent version with larger
displacement and higher compression ration and with induction and
extraction improvements you can reace 300+ HP and still have a road worthy

But even a bone stock TR8 is a heck of a lot of fun.


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