Search results for query: t slot

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  1. Cuda416

    Transfer/Transition slot adjustment

    Seems as @Mattax points out, having both springs in is a good idea. Not that I doubted it, but hadn't gotten to put the big one back in yet and it's dogging during acceleration. I believe the weight without a spring is helping pull the other weight with the lighter spring out faster than I want...
  2. AJ/FormS

    How much RPM drop from park to drive with stock type 340 convertor

    As to #3; Yur getting ahead of yourself, that cam may not need any additional bypass air to what the PCV will supply. As for #2; no, none of those As for #1; if you have a Holley, remove the carb, drain it and flip it over. Look into the primary throttle bores up where the mixture screws are...
  3. Mattax

    Ok, one more question on the Holley jetting.

    Square was never a specification. It was always a ballpark description for a quick check and for guys who had no means to measure. You are absolutely free to give the idle position screw another 1/8 or quarter turn. Then reset the idle mix screws to trim the idle mix. It's a free experment...
  4. mderoy340

    AFR slowly richens at idle

    ...port? If you are the advance start point is on the edge, or the Vcan could be leaking. [email protected] may need drilled throttle plates to prevent T slot over exposure. Check the PCV if you are using one. Make sure the power valve or plug has enough clearance, blocks to main body may not be sealing.
  5. famous bob

    Clevitte Main Bearings with slotted oil feed - Looking for PN

    That is the oiling groove for the thrust sides , I`ve never seen a thrust bearing that didn`t have them, sbc, 426 hemis, 440`s -------------
  6. yellow rose

    Billet Meter blocks for 850 DP... your thoughts?

    I can certainly see that TSR being about as small as you can go with your combo. BTW, I use 10-32 for the T slot restricters. I know some guys use 8-32 but I’d put need bigger than about .078ish (IIRC) the drill gets into the hex of the brass.
  7. Mattax

    Holley stumble trouble

    Too many changes at once. But sometimes you just have to try things, so its all good as long as you learn something. Eventually you'll get a sense of when big jumps are OK and when they are not. You can generally do that with field artillery and naval guns but not always with engines. Once...
  8. yellow rose

    Holley/Demon Carb stumble

    ...whack the throttle 6, 7, 10 times to “clean it out” when in reality they are dumping a crap load of fuel into the engine. The middle third is T slot and cruise which depending on gearing and tire size can also be on the main jet, and most likely will be showing both T slot and main jet...
  9. Mattax

    Stop in for a cup of coffee

    Concept is basically the same, but I wouldn't count on the 'rule of thumb' to be the same. a. The 20-40 thous was based on the older Holleys. Stuff these days, especially non-Holley shiny and colored ones, have different size t-slots so they can act too rich or too lean depending on the ratio...
  10. famous bob

    PCV leak

    A little differance to the subject , but I got the new single ext. pick up line done , filled the new 9 qt pan w/7 qts. , installed the interior mounted vacuum gauge line in the valve cover , ''pcv on the other siide'' , 5 '' of crankcase vacuum , I`m surprised it had that much , .0600 lift...
  11. AJ/FormS

    Large RPM and Vacuum drop when shifting from park to gear

    I don't want to start something; but,I gotta disagree with this; I think it needs to be qualified. But I also get what you are trying to convey, and It's pretty obvious you know your way around timing controls. But it seems to me that you are not speaking to how all streeters are operated...
  12. AJ/FormS

    PCV leak

    Hang on fellas; I fail to see a PCV problem here. I suspect a T-slot problem, and a possible lack of bypass air, coupled with too much idle-timing. And here's why; my 367 has a 230/237/110 Hughes cam in it, .549/.571 [email protected]; and she will idle down to 550/500 pulling herself across the...
  13. DrCharles

    Convert to replaceable idle air bleeds?

    OK, so maybe I won't move the IFR ;) What cam are you running again? First thing is to fix the wideband. Probably carbon on the sensor tip. Without the gauge, tuning is unnecessarily difficult! The return of the dreaded flat spot may be related to t-slot exposure on both primary and secondary...
  14. DrCharles

    Another timing curve question

    Been away on business for the last week. Post office has screwed up the arrival of my 11/22 degree slot piece from Hops anyway, but it'll be ok with the 13/26 for now ;) I decided to convert my carb to 4-corner idle, and bought a Quick Fuel 12-700 baseplate instead of trying to drill tiny idle...
  15. mygasser

    68 valiant signet

    about 2-3 years ago i was asked to have a look at a T bucket a friend of a friend had bought. he wasn't happy with the front brakes and needed advice. anyway whilst there i noticed he had a spare pair of rear tyres so i asked if they were going to be used or were they for sale. he said they came...
  16. AJ/FormS

    Carb issue?

    PCVs are not gonna solve this man's problems; OP is at 6900 ft elevation, and his engine is starving for air. He has already stated that the butterflies have to be opened up PAST the top of the transfers, at 26* advance just to keep it from stalling. Just ONE PCV will never meet that demand for...
  17. yellow rose

    Convert to replaceable idle air bleeds?

    ...need 6/32, 8/32 and 10/32 brass set screws 3/16 long. The 6/32 is for the emulsion holes, IFR and maybe one orther, the 8/32 in the PVCR and T slot restricters and the 10/32 will be your idle air and main air bleeds. I say go for it. You'll need a small drill set, and you should have some...
  18. PistolGrip

    Barracuda Gas Pedal

    I'm going to install new carpet in my '66 Barracuda tomorrow (weather permitting). It is a V-8 A/T w console. I was looking at what I need to remove...seats...seat belts...etc., & noticed the gas pedal is attached to and pivots from the floor. I can't crawl under the car where it sits now, so I...
  19. '63GT

    Dead old 750 Holley - Resurrected !

    Not too bad.... the initial fly-cut (.002) is showing the burring around the drillings knocked down.. One more cut. That did the trick ! circle and arrow is showing where I 'steaked' the booster crimps I decided to tap for 8-32 threads to accept jets for T-slot reducers. I used the...
  20. Mattax

    Large rpm drop

    Correct it should be dry. I beleive there are two styles of PV gasket. One better matches PV's with rectangular holes, the other with round holes. Commonly the PV gaskets split when removed, but I don't think this is any of it. .040 is a lot of T-slot exposure, especially on a newer holley...
  21. AJ/FormS

    Poor idle and off-idle performance after distributor swap

    Ok gotcha! A 600, on a 360 is IMO, still too small. I have run everything from a 500 to a big TQ ( carter-rated 850), and my favorite is the 750DP. I'm no fan of vacuum secondaries. On my 367-combo, the 750DP is not too big. I have a clutch and a 10.97 starter gear. With an automatic and...
  22. bluefish

    493 carburetor tuning question

    Mattax has you going in the right direction. When tuning any carb for the first time always get brand new plugs it in first, then get your timing at idle correct and you would want something in the low 20*s without vac advance with that cam imo. Then get the total set at about 35* without vac...
  23. Mattax

    Holley Jet size

    No. I don't want him to touch the secondary side. Especially not with the information provided. Usually the factory is OK on the secondary side and even if not, the t-slots are often high in bore and in those cases secondary idle position idle can't be judged by t-slot exposure. We can come...
  24. justinp61

    What do you think of this plug?

    Is it still square jetted? If you're satisfied with the cruise I'd take a big swing at the PVCR's and see what the plugs look like.
  25. yellow rose

    What do you think of this plug?

    ...the cruise pretty close. I only change the PVCR’s to change WOT on this application. Carbs are 4 corner idle. The lean surge was from the T slot restricters being .004 too small. Opened them up and the lean surge was gone. The one thing I didn’t do on these carbs was change the secondary...
  26. TrailBeast

    Ok, one more question on the Holley jetting.

    ...about all this as much as I can, so I know exactly what you are describing. I wanted to check in with you guys before doing anything with the T slot feeds, even though we can believe everything we see on the net, right?:D I have a pin vise as well as bit sets down to a couple of thousands, so...
  27. cchrishefish

    Slant 6 Distributor Hold Down

    LOL, OK I am looking for I believe '74 and up distributor hold down without the restrictive slot as shown in the following link: fresh build idle problem - Slant Six Forum The side by side pictures are at the bottom of page one by user Reed.
  28. 512Stroker

    Holley stumble trouble

    Curious, way did you take the timing "all the way back to 10 initial" ? That's a huge jump.
  29. yellow rose

    First plug change.

    ...be, you’ll have to fix the rest of it...it will likely have tip in issues and at the end of transition it will go rich, so that’s where the T slot restricters come in the most. The smaller the MAB the later the booster gets going, and the fatter the fuel curve will be at RPM. The larger the...
  30. SSG_Karg

    Holley stumble trouble

    ...damn stumble. Current setup: 24 initial, 34 total with can unplugged. Idle rpm 800 with 10-10.5” vacuum. 37 primary shooter, 31 secondary. T slot is unmeasured after doing all this fiddling but pretty sure it’s in the ballpark because the idle mix screws are very responsive and with that...
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