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Search found 408 matches

by hoodeng
Mon Jul 13, 2020 10:58 pm
Forum: Engine Tech
Topic: 2 stroke for drag racing cars?
Replies: 54
Views: 8401

Re: 2 stroke for drag racing cars?

I am a bit surprised that so far there has been no mention of the Rolls Royce Crecy engine, a V12 26litre sleeve valve boosted two stroke developed during WW2 but did not see production due to the development of the gas turbine. It was intended as a sprint fighter engine. I would have to say there i...
by hoodeng
Mon Jul 13, 2020 1:42 am
Forum: Engine Tech
Topic: Tired rod bolts - inconsistent torque development?
Replies: 6
Views: 239

Re: Tired rod bolts - inconsistent torque development?

If you torque in the sequence the manufacturer/ fastener manufacturer recommends you will get a clean feel as the wrench clicks off [or whatever yours does]. Lube threads and nut faces as they recommend, if its engine oil, its engine oil that is used in that engine unless specified otherwise [no syn...
by hoodeng
Fri Jul 10, 2020 10:59 pm
Forum: Engine Tech
Topic: Indexing spark plugs
Replies: 23
Views: 776

Re: Indexing spark plugs

Spark plugs dont spark, they ionize. A turbulent chamber and charge will propagate pretty evenly regardless of ground strap position.

Years ago i used to see heads for plug thread repair due to owners cranking that sucker down till the lines came up, very rare these days.

Cheers.
by hoodeng
Thu Jul 09, 2020 9:37 pm
Forum: Engine Tech
Topic: measuring JE coated pistons
Replies: 15
Views: 542

Re: measuring JE coated pistons

The main reason i don't use a fixed bore dimension off the package is because the ambient temp can vary wildly throughout the year, 4°c to 45°c, i have measured pistons in the middle of summer that would have .0015" clearance if bored to dimension and conversely have .0025" if bored to dimension in ...
by hoodeng
Thu Jul 09, 2020 2:46 am
Forum: Engine Tech
Topic: measuring JE coated pistons
Replies: 15
Views: 542

Re: measuring JE coated pistons

I have received various reply's from piston manufacturers regarding hard and soft piston coatings. As there are a number of types in use the allowance in piston measurement can vary, from allowing nothing with a piston/bore size to size fit [no clearance] with abrade-able soft coatings, up to allowi...
by hoodeng
Tue Jul 07, 2020 9:38 pm
Forum: Engine Tech
Topic: measuring JE coated pistons
Replies: 15
Views: 542

Re: measuring JE coated pistons

If you had a bit of a chuckle watching someone check a piston with a vernier and thinking what they see on the dial is accurate enough to bore to,how's this! I do bores for a lot of service centers, they are sent back with clear instructions that the bores need to be cleaned to a standard, also that...
by hoodeng
Tue Jun 30, 2020 7:36 pm
Forum: Engine Tech
Topic: Reaming bronze valve guides
Replies: 5
Views: 312

Re: Reaming bronze valve guides

One of the most feared statements by a prospective machinist is,,

" Piece of piss mate, how hard can it be"

Cheers.
by hoodeng
Tue Jun 30, 2020 4:29 am
Forum: Engine Tech
Topic: Reaming bronze valve guides
Replies: 5
Views: 312

Re: Reaming bronze valve guides

BC that is how i do my c/i or bronze guides. K-Line reamer in drive head to .001"-.0015" under-size then finish with Sunnen hone , check throughout with pin gauges, no hour glassing, taper or out of round. I have checked in the past with internal bore gauges but the consistency has proved that step ...
by hoodeng
Mon Jun 29, 2020 11:39 pm
Forum: Engine Tech
Topic: Reaming bronze valve guides
Replies: 5
Views: 312

Re: Reaming bronze valve guides

K-Line Bronze lube is one of the best. A low speed electric drill is better to drive a reamer as it keeps rotation constant, stop and start hand reaming is tough on reamers.

Cheers.
by hoodeng
Sat Jun 27, 2020 10:18 pm
Forum: Forum Help / Questions / Tips
Topic: Every thread in Politics / Religion / Current Events forum is locked?
Replies: 21
Views: 510

Re: Every thread in Politics / Religion / Current Events forum is locked?

I agree with BC, and i see Packard's point as well. Off engineering topics are not really what this forum is about,,but,, I don't mind seeing other peoples perspectives on events that a lot of people do not get exposed to. I can see that i am either not alone in support or counter to issues, i'm a b...
by hoodeng
Fri Jun 19, 2020 9:26 pm
Forum: Engine Tech
Topic: Too much oil in sump
Replies: 26
Views: 814

Re: Too much oil in sump

Some valid points by contributors for sure. The issue that i was describing was churning, where the proximity of the oil surface to the crank was getting picked up and loading the cylinders. People conversant with the engine i quoted would know that the first area to show oil flooding is the air box...
by hoodeng
Fri Jun 19, 2020 1:14 am
Forum: Engine Tech
Topic: Too much oil in sump
Replies: 26
Views: 814

Re: Too much oil in sump

Many years ago i had an experience with a 4/71 Detroit diesel that had excessive oil consumption between services, the engine was not that big on hours and performed faultlessly otherwise. Detroit offered a reason that possibly the crankcase was being over filled at service, No was the reply, it was...
by hoodeng
Mon Jun 15, 2020 4:36 am
Forum: Forum Help / Questions / Tips
Topic: Every thread in Politics / Religion / Current Events forum is locked?
Replies: 21
Views: 510

Re: Every thread in Politics / Religion / Current Events forum is locked?

I understand your reasoning Mike, some had turned it into a dart board and can not even see that.And yes, the forum has engineering as its core. Unfortunately for me the timing of shutting the board was just before i was going to make one of my very very rare political/sociological contributions in ...
by hoodeng
Wed Jun 10, 2020 4:25 am
Forum: Engine Tech
Topic: Tuning with an A/F gauge
Replies: 31
Views: 1209

Re: Tuning with an A/F gauge

Sounds like a plan Travis, at least you acknowledged you have more to learn with tuning. Nothing wrong with that at all, we all started somewhere, at least you have had a go, and seen where your limits are,,there are others that can tune an engine to a standstill and not see their finger prints stil...
by hoodeng
Sat Jun 06, 2020 8:55 pm
Forum: Engine Tech
Topic: Another lifter question
Replies: 5
Views: 425

Re: Another lifter question

We have two different applications here, I went off topic by bringing up the Harley Davidson application, but as both you guys have experience in what we do with that vehicle i thought it worth mentioning if it could help. With the S/B Chev, the lifter manufacturers recommendation will be the way to...