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Search found 5029 matches

by Walter R. Malik
Wed Aug 10, 2022 9:48 pm
Forum: Engine Tech
Topic: Spark Plug Help
Replies: 7
Views: 142

Re: Spark Plug Help

Anyone know if NGK makes .750 reach, gasketed, 5/8 hex non projected, resistor plug in 8 heat range or colder? Or even .708 tapered seat in 8 heat range? Pretty sure the .708 reach doesnt exist. But.....NGK'S numbering system makes me crazy. Only in a non-resistor in an 8 with that package. R5671A-...
by Walter R. Malik
Wed Aug 10, 2022 9:29 pm
Forum: Engine Tech
Topic: If going to Methanol, do I need to raise the CFM as well?
Replies: 5
Views: 135

Re: If going to Methanol, do I need to raise the CFM as well?

Hello Gang, I have another dumb question for y'all... Building the 433 BBC, all info says I should use a carb in the 800-850 cfm range. If I decide to go to Methanol or E85, and the fuel now needs to be doubled (or there about), do I then also need to raise the CFM rating of the carb? Thanks, Patri...
by Walter R. Malik
Wed Aug 10, 2022 9:23 pm
Forum: Engine Tech
Topic: Solid flat tappet
Replies: 3
Views: 43

Re: Solid flat tappet

Hi guys, I recently broke in a solid flat tappet cam for the first time. I have done plenty of hydraulic flat tappet cams in the past with no problems. My question is after breaking in the solid and putting a few street miles on it, I adjusted the valves and found them out approximately. 005-.007 o...
by Walter R. Malik
Tue Aug 09, 2022 8:16 pm
Forum: Engine Tech
Topic: Where can I get these?
Replies: 9
Views: 365

Re: Where can I get these?

3/8 barb necked down to 1/4. I’ve looked around a good bit, no luck so far. See yellow circle 86FF5127-0457-4A28-B595-23C86C9AFD8C.jpeg I have several out there which I have made. Get a proper 3/8" tube and a 1/4" tube with a very short collar of 5/16" tube ... using some silver solder with a natur...
by Walter R. Malik
Sat Aug 06, 2022 11:01 am
Forum: Engine Tech
Topic: Drilling holes in head gaskets = more flow = lower temps: Change My Mind!
Replies: 30
Views: 944

Re: Drilling holes in head gaskets = more flow = lower temps: Change My Mind!

Adam, BillK stated the Facts very well and RCJ brings up a good point, the Hottest area is between the two center Exhaust ports, and plumbing water from the water pump to each Head or engine Block directly below the two ports is a good move . Mark H. That gasket in the photo is already different th...
by Walter R. Malik
Fri Aug 05, 2022 2:31 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: Dual Quad tuning tips?
Replies: 22
Views: 397

Re: Dual Quad tuning tips?

Their tuning is slightly different depending upon whether they are "staged", (and which one is ahead of the other), or both open at the same time. Why are you using 20W-50 oil ...? They are 1:1 with each other. The oil? Habit. That's what the guy I bought it from (in 2003) ran in it and I only rece...
by Walter R. Malik
Fri Aug 05, 2022 11:40 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Dual Quad tuning tips?
Replies: 22
Views: 397

Re: Dual Quad tuning tips?

Hello all - I'm new here. Been reading as much as possible about tuning Holley 1850C carbs in a dual quad configuration - there's so much to know and learn. I have a solid understanding of how carbs and engines work (engineering background) but I'm short on experience and would like to stick to old...
by Walter R. Malik
Fri Aug 05, 2022 11:03 am
Forum: Engine Tech
Topic: Melting 10550ST SBC Oil pump
Replies: 4
Views: 338

Re: Melting 10550ST SBC Oil pump

Hi all, have done a lot of searches on this oil pump and can find no real world experiences since 2018. I have a current sbc build underway / stroked 383, and am looking for advice. The original engine had a bbc oil pump with a custom oil pan. The intended vehicle it will reside in is a HK Monaro w...
by Walter R. Malik
Fri Aug 05, 2022 10:55 am
Forum: Engine Tech
Topic: Adnormal main bearing wear
Replies: 3
Views: 255

Re: Adnormal main bearing wear

Any one experienced upper main bearings wearing a lot more than the lowers? This is on a BB Chev Dart block new build. 1 - 4 have excesive wear , # 5 still like new. Clearance 1 - 4 has .00275", # 5 has .0032". Personally, I would say that the 3rd from the rear counterweight on that crankshaft is n...
by Walter R. Malik
Wed Aug 03, 2022 4:21 pm
Forum: Engine Tech
Topic: Looking for some Help...SBC Oil fouling plug
Replies: 45
Views: 904

Re: Looking for some Help...SBC Oil fouling plug

Tom68 wrote: Wed Aug 03, 2022 3:05 am Can't imagine enough oil getting past a rocker stud even if you fitted it dry.
At over 19 inches of manifold vacuum on deceleration and the constant running at 12/14 inches of vacuum in the intake port will be the cause of more oil dilution in the cylinder than you evidently realize.
by Walter R. Malik
Wed Aug 03, 2022 11:02 am
Forum: Engine Tech
Topic: Questions about ports that stall, and cam lift.
Replies: 32
Views: 1073

Re: Questions about ports that stall, and cam lift.

I stand by what I posted. If a back cut increases reverse flow it WILL lose power. Simple as that. Let's qualify that ... what I have witnessed is IF that back-flow increases MORE than the air flow in the correct direction has increased from that back-cut, the engine will lose power. Most people wo...
by Walter R. Malik
Wed Aug 03, 2022 12:58 am
Forum: Engine Tech
Topic: Questions about ports that stall, and cam lift.
Replies: 32
Views: 1073

Re: Questions about ports that stall, and cam lift.

I'm seeing about a 3% drop from .500" to .600" (254 to 246) . It does rebound approaching .700" though but that's far and beyond the .575" target suggested. Might not be worth thinking about. Thanks. Is this a stock GM head by chance? This is something we run into with classes that have to run stoc...
by Walter R. Malik
Wed Aug 03, 2022 12:45 am
Forum: Engine Tech
Topic: Looking for some Help...SBC Oil fouling plug
Replies: 45
Views: 904

Re: Looking for some Help...SBC Oil fouling plug

Looking for some help on my new engine with less than 500 miles. It developed a misfire and I discover #1 plug was oil fouling. I changed the plug and pulled it after a ride and noticed it’s got some oil on it again. I went with a 1 heat range hotter plu. I had Autolite 3924 in that the head manufa...
by Walter R. Malik
Mon Aug 01, 2022 9:08 pm
Forum: Engine Tech
Topic: Top end oiling issue after hydraulic roller change.
Replies: 27
Views: 739

Re: Top end oiling issue after hydraulic roller change.

I switched to LS7 lifters in my 2nd gen sbc LT1, prior to this change they were comp 875's and I alway had great oiling to the rocker arms. When preoiling on the stand it took rotating the crank to get everything upstairs oiling. (Should of been my first clue) I never had to do that before the lift...
by Walter R. Malik
Sun Jul 31, 2022 4:54 pm
Forum: Engine Tech
Topic: Too much spring for a hydraulic roller?
Replies: 8
Views: 532

Re: Too much spring for a hydraulic roller?

452# spring rate, 135# on the seat. Conventional dual spring arrangement. With a .560" lift hydraulic roller cam this puts it about 380# over the nose. Is this going to be ok for a street motor? Cam is 280@.006, 224@.050, with Howard's 91260 lifters With good quality lifters which don't leak down q...