Back to the Holley vs thermoquad. Anyone have actual experience with switching these carbs?
Yea, here here. I've gone both ways. TQ to Holley and Holley to TQ.
If your asking my opinion, before I give it, no matter what carb YOU choose, learn the carb!
I like the TQ better. More flexable and forgiving than a Holley.
While there are less parts to modify, adjust, tune and tweak than a Holley, (there draw back as well as available parts that can be hard or impossible to find) once it is set up correctly and the carb itself is a good & early one, IMO, *I think* you'll like it better/best.
The things I like best about the TQ are;
Being a spreadbore carb, small high velocity primaries. This makes driving around a greater pleasure. Very good throttle response, better for driving around town. Possible for more mileage.
The secondaries are huge for biggest performance gains possible.
The butterflies are mechanical in nature but the spring loaded air velocity door above it helps control when the effect of the open barrels come in. More tention equals later opening and more smoothly. Weaker spring load allows it to come in sooner and more violently.
They can be mildly modified easy enough. Heavily modified TQ pros are out there.
They are capable.
There draw backs as mentioned above are what keep most people out of them.
Tuning parts, race parts, replacement parts can be hard to locate.
Also, the only models that have an electric choke are the smaller 800's. On the smaller 800 carbs, the primary size is reduced. You can feel the differance on larger mills or more powerful mills.
If you decide to use a TQ, just make sure you use a thick base, carb to intake gasket to keep heat away.
. Trap speeds were 105-108 mph for this combo most of the time.
