Anyone try Thompson powerblast plate

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Ok, so here is my Zero Skin in the game update.

@kursplat did shoot these over to me to take a look at, and bolt on my carb. took them to the track with me to throw on at the end of the night, and make a test run, and ran into an issue.

The holes in these do not cleanly line up with my carburetor squirters (which is a 4150 based proform)
fuel actually mists up and out of the carburetor when it contacts these "plates". if i press on the gas, the car runs notably rougher, as i would expect given what i'm seeing as fuel misting up and out (assuming to some kind of misalignment)

called them several times with no answer, shot an email over also.

so just a clean statement of fact, with MY carb, they don't seem to fit well enough to give an actual test. Now clearly there are a bunch of guys on youtube with them on and running (and prettily misting as advertised) , so not sure what i'm running into. Only thing i can report is they did not simply bolt on and work like magic. I'll report with what they say via email.
 
Ok, so here is my Zero Skin in the game update.

@kursplat did shoot these over to me to take a look at, and bolt on my carb. took them to the track with me to throw on at the end of the night, and make a test run, and ran into an issue.

The holes in these do not cleanly line up with my carburetor squirters (which is a 4150 based proform)
fuel actually mists up and out of the carburetor when it contacts these "plates". if i press on the gas, the car runs notably rougher, as i would expect given what i'm seeing as fuel misting up and out (assuming to some kind of misalignment)

called them several times with no answer, shot an email over also.

so just a clean statement of fact, with MY carb, they don't seem to fit well enough to give an actual test. Now clearly there are a bunch of guys on youtube with them on and running (and prettily misting as advertised) , so not sure what i'm running into. Only thing i can report is they did not simply bolt on and work like magic. I'll report with what they say via email.


Well that's a bummer. What's worse is they haven't gotten back to you about why they don't fit.
 
did speak with them on the phone. Very Nice and helpful. trying some alignment tricks. In their defense, they are in CA, so a few hr time difference.
In short, the Proform squirter holes do not appear to be on the perfect 45 degree angle they are supposed to be. (Casting flaw) it was suggested i try some different squirters, or if i dind't want to, they would gladly take them back. I popped on some from an AED i had laying around, and the holes do line up much better. so that was on My equipment. not their product. So Installed now. a few throttle cracks. They do LOOK pretty. i admit i do see the fuel spraying nicely. we'll see what that translates to when i can get back to the track. the only thin i don't "care for" is i have a progressive linkage on my secondary, and it doesn't spray as "pretty" but i imagine thats the same regardless of if they are there or not.
 
thanks JM. i don't know how late in the year you manage to get track time in, but there's something to be said for a good cliff hanger at the end of the season :thumbsup:
 
it Seems logical, but i can never understand why things like this simply aren't marketed with 3 or 4 different engines, or vehicles, strapped to a dyno with "amazing" results. a 4 min video, and it either rides or dies.

We tested a 427 CID engine the other day in a cell, and were able to KILL 50 HP with a certain type of air filter assembly. We have a customer in the field with the same air cleaner saying it "feels better" "feelings" aren't always what they seem!

Well tell us what it was !! Inquiring minds want to know !!!---lol
 
Well tell us what it was !! Inquiring minds want to know !!!---lol
Its some tiny little filter with a green foam element. not a fiber element. Its supposed to mimic what an old FE ford would have had in a cobra. We simply swapped to a KNN element in the same housing, and dumped the lawnmower foam. Literally 50 numbers.
upload_2019-10-9_13-45-1.png
 
Ok! back to the original thread, and my recap from the beginning.

Went to test fit them, and discovered my offshore squirters were actually out of spec. Meaning the fuel shot from my squirters was hitting the boosters at differing angles. w/o the plates, it wouldn't matter. With the plates, it has to be lined up properly. Thompson was prompt in getting back to me, and advised to try actual holley brand squirters. I dug out an old parts carb with similar sized holley brand squirterts, and boom, went on perfect. misted the fuel down and pretty like its supposed to. From all the data i can gather in my garage, in park (not a ton)... they don't seem to hurt anything at all. We'll see what they do on the track next year. I don't have any major performance modifications in store this winter, beyond a radiator, so I'd say if i run my best ET ever early in the season, they are doing something. To test that theory, i'll pop them back off at some point and see if it responds negatively. I do recommend going 1:1 linkage on a double pumper. I do not like how the fuel trickles down the secondary plate with a progressive linkage. Thats just my opinion, and I have zero backing to indicate if its any different whatsoever from a normal secondary booster/squirter. on a 4160 this obviously wouldn't be an issue. you just need the quick/fuel pump shot from the 1:1 on a 4150 to fully "mist" the secondary shot off the power plate. that was my solution vs changing pump cams to hit "harder"

here is a video for the patient followers! this is 1:1 linkage. with holley branded squirters, waiting for the track next year.

 
Driving around and doing some throttle hits on the street is about the least definitive test I could imagine using to validate a product or modification.

The OP asked "Anyone have any testimonies" so I shared the opinions of some friends.

I'm sure everybody has used the butt dyno at some point to validate a modification they've made.
 
Even a nasty pee stream of fuel is instantly atomized in an intake, right? I mean there is a lot of velocity at wot right? Why not just put a mister cap from a bottle of Windex on the squirter if that is what they are after. No impeding of the air flow...?
 
Even a nasty pee stream of fuel is instantly atomized in an intake, right?
But to what degree. WOT doesn’t like a fine mist fuel charge.
I mean there is a lot of velocity at wot right?
Ehhhh, not really or exactly. WOT @ what RPM?
Why not just put a mister cap from a bottle of Windex on the squirter if that is what they are after. No impeding of the air flow...?
Like an overhead, ummm, errr, I mean, an over carb misting jet?
 
The OP asked "Anyone have any testimonies" so I shared the opinions of some friends.

I'm sure everybody has used the butt dyno at some point to validate a modification they've made.
I didn't mean any shots at you. sorry if i seemed a bit snippy. I'm no more use than anyone else at this point as i haven't tracked it yet.

I 100% get the thought process. Atomize fuel better....get a better burn...make more power.

question is... does a finely tuned carburetor benefit any better from a mixture that atomizes earlier in the process? or would the fuel be equally atomized from bouncing off the rough intake, the throttle blades, etc. by the time it hits the combustion chamber.

I'm speculating that on a combo that isn't PERFECT, these probably do 100% help, as everyone tends to go a little big on their carb...and this probably helps atomize that extra fuel. i'm probably in this boat on my drag car as well.

again i'm 1000% optimistic they will do something on the track, but w/o throwing any stones, i also 1000% see the science of why they would work in a car with a carb thats a little too big, moreso than one with the perfect setup thats been wideband tuned.

maybe they work on both? Idk? i'll have a report come april. until them i'm just one more joker that thinks they look pretty, and probably wouldn't bother taking them off even if they do much at the track.
 
But to what degree. WOT doesn’t like a fine mist fuel charge.

Ehhhh, not really or exactly. WOT @ what RPM?

Like an overhead, ummm, errr, I mean, an over carb misting jet?

why wouldn't it like an atomized (fine mist) fuel charge? More surface area, more complete combustion? MPFI...

WOT where its still using the pump shot is probably not that high, grant you that, but is it still hitting the side of the booster that has a high velocity around it?

over carb misting jet sounds like any TBI....All in the name of emissions and a more complete combustion creates more power per lb of fuel.
 
why wouldn't it like an atomized (fine mist) fuel charge? More surface area, more complete combustion? MPFI...
You make a sound argument with a scientific notation that just doesn’t pan out in real world applications. Hey did some reading on the subject and I can not remember it all to explain it but in a nutshell, it just doesn’t pan out that way.

MPFI is awesome but overall it still makes less top end power than a carb.

WOT where its still using the pump shot is probably not that high, grant you that, but is it still hitting the side of the booster that has a high velocity around it?
Higher velocity when in the rpm range. It is a constant changing variable. If you have enough pump shot for low rpm take offs, then the same amount higher in the rpm range is more than enough if not to much. You only need enough not to stumble while maintaining the desired fuel ratio.
The amount of pump shot injected/used is also a variable between manuals and automatic as well as completely adjustable in a Holley. Lesser on the Carter. It still may need adjusting.

The higher velocity around the booster is always there. It’s always higher than the rest of the Venturi. But that doesn’t mean it is high enough to gobble up and atomize the whole or part pump shot. The velocity may still be slow to do so atomize it all.

over carb misting jet sounds like any TBI....All in the name of emissions and a more complete combustion creates more power per lb of fuel.
At low to mid rpm’s. Excellent for mileage and drivability and emissions. Not all out power potential.

Carburetor powered cars still maintain the highest hp output period.
 
Garbage, in my opinion.

Get your pump diaphragm and nozzle correct for your build.

Its realy that simple.
 
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