Well, just as another point of reference, Kas Kastner got over 170hp
out of the race-prepared TR6 engines with stock dual carbs. And he was
able to get almost 150 with just some head work (including 10:1
compression), stage 2 cam, and header. That's a very streetable 150hp.
On stock carbs.
Tim Holbrook
1971 TR6
--- "Navarrette, Vance" <vance.navarrette@intel.com> wrote:
> Folks:
>
> Check out "The Theory and Practice of Cylinder Head
> Modification" by Vizard. He claims in the section on the
> 2.5l 6-pot that past about 130HP (if memory serves) you
> will need to upgrade the carbs, as they begin to be a
> restriction.
> Not to say you can't get more than 130HP from
> twin ZS carbs, but beyond 130HP you begin to enter the
> region where upgrading the carbs will give more power.
> The inference from this (for me at least) is that
> there is no power to be gained on a stock motor if you
> upgrade the carbs. The "wow" factor is another story however....
>
> Cheers,
>
> Vance
>
> ------------------------------
> 1974 Mimosa Yellow Triumph TR6
> Cogito Ergo Zoom
> (I think, therefore I go fast)
>
>
>
> -----Original Message-----
> From: Timothy Holbrook [mailto:tjh173@yahoo.com]
> Sent: Sunday, January 19, 2003 12:16 PM
> To: 6pack@autox.team.net
> Subject: Re: Triple Carbs Verdict
>
>
> I don't think anyone knows for sure, because no one has ever done
> dyno
> tests back-to-back of identically prepared engines with 2 carbs vs.
> 3.
> That would be a really interesting test...
>
> I think we can all agree that you should spend your money on
> modifying
> the engine a bit first (port/polish head, increase compression, add
> performance cam, header, roller rockers, etc) before adding the third
> carb. The late-style stock intake manifold is pretty long and offer
> a
> relatively straight shot to the head, and I bet it flows pretty well.
>
> I'm sure you can get over 150hp out of the TR6 engine with stock dual
> carbs, while still remaining reliable and streetable. There are some
> guys on this list with stock dual carbs, but with other mods, who are
> running mid 15s on the 1/4 mile...
>
> Tim Holbrook
> 1971 TR6
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