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QFT metering Blocks
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Author:  nomad [ Tue Oct 11, 2011 8:53 pm ]
Post subject:  QFT metering Blocks

I have in my possesion a pair of the green QFT 2 circuit blocks. I also own a pair of the red QFT 2 circuit 3 emulsion blocks. Soooooo.....I thought I'd pop out the mainwell plugs to see whats in there. Both blocks have identical mainwells which a #2 tapered reamer is too large.

The green block emulsions are .027, blank. .027, and blank. Anti-siphons are also .027. Mainwell exits are .160. I really thought that these blocks would be a little more special than just anodized green and a fourth emulsion.

Author:  jmarkaudio [ Tue Oct 11, 2011 10:04 pm ]
Post subject:  Re: QFT metering Blocks

But the green is cool, right? :-

Author:  ron [ Wed Oct 12, 2011 8:27 am ]
Post subject:  Re: QFT metering Blocks

I have a set of green QF blocks that are about 3 years old and they measure, mainwell .182 no taper, cross exit is .160, eholes and anti siphon are .028, top to bottom are, open, blank, open, blank, came with a .043 IFR at top and a PVCR of .073.

Author:  ajcasini [ Wed Oct 12, 2011 3:05 pm ]
Post subject:  Re: QFT metering Blocks

I have seen this as well. The original blocks were the ones described above. They changed their design on the newer style. They are a little different than the red blocks however will not work on much more than a 750 carb. I have run the new style blocks on a couple 750's and they work very well. The combos are mile SBC running 11.90's and 11.60's. I drill the main wells for anything bigger than 750.

QFT Green Blocks
Main Well .164 - .187
Idle Well .096
Cross Channel .161
PVCR .073
Emulsion Blank-.028-Blank-.028
Kill Bleed .028
IFR .043


QFT Red Gas Blocks 34-4
Main Well .158-.180 Taper
Idle Well .096
Cross Channel .140
PVCR .055
Emulsion .025-.025-.025-.025
Kill Bleed .028
IFR .035

Author:  Ken0069 [ Wed Oct 12, 2011 4:03 pm ]
Post subject:  Re: QFT metering Blocks

ajcasini wrote:
I have seen this as well. The original blocks were the ones described above. They changed their design on the newer style. They are a little different than the red blocks however will not work on much more than a 750 carb. I have run the new style blocks on a couple 750's and they work very well. The combos are mile SBC running 11.90's and 11.60's. I drill the main wells for anything bigger than 750.

QFT Green Blocks
Main Well .164 - .187
Idle Well .096
Cross Channel .161
PVCR .073
Emulsion Blank-.028-Blank-.028
Kill Bleed .028
IFR .043


QFT Red Gas Blocks 34-4
Main Well .158-.180 Taper
Idle Well .096
Cross Channel .140
PVCR .055
Emulsion .025-.025-.025-.025
Kill Bleed .028
IFR .035


So are the green blocks suppose to be for E85 then? :-k

I've got a set of their red blocks on an old style 8896 1050 Dominator but I can't remember the mapping for those. #-o

Author:  ajcasini [ Thu Oct 13, 2011 4:11 am ]
Post subject:  Re: QFT metering Blocks

Yes the green blocks are QFT E85 calibrated metering blocks.

Author:  F636 [ Mon Jun 11, 2012 12:12 am ]
Post subject:  Re: QFT metering Blocks

I have the QFT green blocks and I just pulled the main plugs and I can't get a #2 taper in there. I reamed it for the #2 but it also came with .043 ifr,. 076 pvcr, .028,p,.028,p and these were purchased in may '12. The cross channel is at least .160

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