The text below is unedited, just like I received it, about a recent dyno test session (March 2003 ) involving one of my Chevette racing carbs.
dear bob,
>
> hey just thought i would write to fill you in on some good news(for you),after i got
back from your house i went to huntleys to see if they still had the chevette motor on the
dyno. fortunately for me they were testing different types of headers and carbs,one of
your earlier editions supposedly the second one you done and one of there carbs,electronic
with modified linkage to make the secondary open manually. i have to admit they had me
worried at first because their carb was pulling equal horse power with more torque. your
carb peaked hp at 6000 rpm before dropping off ,max hp 120.9. the torque peaked at 128 ft
pds and dropped of quickley there carb peaked at 120.9 max hp at 6500 rpm there torque
peaked at 135 ft pds and carried it through the run. im guessing that some one has changed
things in your older carb or just messed it up playing with it. seeking redemption i had
to wait untill today to bolt on the carb getting picked on all day because it seemed for
the time being that theirs was better. so first thing this morning i put the carb i just
got from you we warmed it up and started to dyno the motor i was busy tearing a motor
apart by then when i noticed a great silence from the dyno room, with curiosity killing me
i had to find out the results. if looks could kill id be dead. with the carb i just got
off of you the motor dynoed at max peak hp of 151.4 at 6600 rpm and 158 ft pds max torque
at 5500 rpm and carried it all the way through the run. keep in mind that all runs are
stopped at 7000 rpm after all its a chevette not a V8. greatly impressed the guys at the
shop took back all remarks and told me i had a keeper. i think dennis the guy who makes
carbs there was a little jelous, and dissapointed but what does he expect. the guys motor
that was being dynoed is exactly to the tee identicle to mine so now i know what i got.
the shop owner even reduced himself to recommend your carb to the man who owns the motor
we tested. so if you get a call from a guy named ben in a couple of days dont be
supprised. . thanks for the great carb will try to keep you informed thanks tj.
>
Ready to race Chevette carb !
I would like to comment on few items.
First, it's obvious the carburetor I did two years ago, if that is correct, probably needs looked at. It *should* perform as well as all the other carbs I prepare, unless it has dirt in it, or something else is wrong.
Also, the second carb, while putting out some impressive numbers, was in no way optimized for this engine, or a dyno test session. I was unaware that this carburetor was going to be tested on a dyno. It would be interesting to see what it would do if optimized for conditions. Of course, it's possible that it is already as good as it can be, but this is unlikely.
You want power ? Give me a call, or an email.
bobwatts
Watts Carburetion Service