Thompson Performance 'Powerblast Plates'

[tc1959]

 

[UNGN]

So I installed them this afternoon. If you still have the choke, do it off the car. My fuel lines are long enough I can pull the carb on and place it on the cowl in front of the battery to work on. Took about 15 minutes total from start to finish. Tested on the fender squirting into an oil pan, then bolted it back on.

The secondary jets have an OK pattern, I'm not that happy with the primary - most of the spray is right (onto the plate and down), but some goes straight out from the jet in a fine mist - I figured that couldn't hurt so I bolted it back on.

The initial throttle opening stumble is still there, but when it catches after the stumble it seems stronger. I did a few driveway clutch releases and it seemed a little stronger off idle. My kid came out and played with the car and he said is what a LOT better. I don't know if I'll go that far until I drive it a little.

The front end is tore apart again so that may be a few days.

 

[L67ss]

Seems like a good way to flood an engine.....also atomizing in the carb instead of intake it seems like it'd cause it the fuel to heat up

 

[UNGN]

The sole purpose of a carb is to atomize fuel. The Intake design helps keep it atomized, but the carb does all of the atomizing.

 

[L67ss]

Next they'll have performance "chips" for obd2 cars lol

 

[TURNA]

Did you try to adjust the plate to get a better spray pattern?

 

[UNGN]

Did you try to adjust the plate to get a better spray pattern?

There isn't much adjustment. Both the plates and the Jets are clocked to the carb. The plates go under the jet but have holes in them that the jet fires through so the spray is on the underside of the plates. On my primaries, the edges of the spray hits the sides of the holes and makes a fine mist (not the design intent of the plates) which I figure doesn't hurt, but adjustment/opening the holes could remedy this.

Ideally, you would fit the nozzle to the plate and put this assembly on. With the plate on the nozzle, the assembly won't fit past the choke plate, so you have to install each piece separately (like a ship in a bottle) so a perfect mate up is a little harder to achieve.

The only other adjustment is bending the plates out a little because they can't really go in. At some point they are going to be a flow restriction. I think the Primary plate will hit the choke flap if bent out, not letting it fully open, which will definitely be a flow restriction.

 

[lilbowtie]

 

[UNGN]

I checked my Nozzles and have a 31 on the secondaries with good flow and a good pattern, but I have a 40 on the primaries and according to the video, I need a hollow bolt, which I don't have and my 40 looks smaller than the 31 so I going to pick up a bolt and nozzle later today.

 

[lilbowtie]

40 is an awful big squirt - is there any reason for the big difference between primary & secondary.