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Search found 85 matches

by dhidaka
Fri Aug 28, 2020 5:15 pm
Forum: Engine Tech
Topic: Header Tube and Collector Specs "Trends"
Replies: 37
Views: 1819

Re: Header Tube and Collector Specs "Trends"

So Larry, for those of us without an engine dyno:
1. How is EGT measured?
2. How do we successfully use PipeMax in exhaust design calculations?
by dhidaka
Mon Aug 10, 2020 9:30 pm
Forum: Engine Tech
Topic: Welded Camshafts for regrinding
Replies: 36
Views: 1696

Re: Welded Camshafts for regrinding

WebCams produces a nice hardweld product. The last person I talked with in sales is female and she knows the product. Grinds are available that are not in their catalog. Just ask. She sent me a list with timing specs for the parameters I requested.
by dhidaka
Fri Jun 05, 2020 9:22 pm
Forum: Engine Tech
Topic: Experience w/ Rebco Machine piston mods?
Replies: 28
Views: 4744

Re: Experience w/ Rebco Machine piston mods?

Going by Rebco next week as Eric's shop is just a few miles from me. He has 9 Bridgeports (I think 9), CNC, tracer mill each set up for a different operation. Also, does coating on pistons. I have watched him work. He is very meticulous, unassuming and a great guy. Nice to conveniently get piston wo...
by dhidaka
Wed Jan 22, 2020 8:26 pm
Forum: Engine Tech
Topic: offset valve seats
Replies: 22
Views: 1575

Re: offset valve seats

Ok, for the stupid like me....How do you move a valve seat without moving the guide? You are talking lateral moves and not in or out ? I have off-set valve guides approximately .020" outboard on 2-valve hemi motorcycles for increased valve-to-valve clearance. Any more than that and springs might in...
by dhidaka
Fri Jun 21, 2019 1:42 pm
Forum: Engine Tech
Topic: Ignorant young racers...is there any hope?
Replies: 77
Views: 6659

Re: Ignorant young racers...is there any hope?

I once witnessed a group of stoners trying to push start a slant 6 Duster. It was an automatic, the driver was cranking it over on the starter and pumping the gas like a madman as they crawled along at 2 mph. I intervened, pulled the breather cover, held the throttle open and it managed to gurgle t...
by dhidaka
Mon May 20, 2019 12:19 pm
Forum: Engine Tech
Topic: Reputable links for horsepower from windage tray/crank scraper
Replies: 255
Views: 13139

Re: Reputable links for horsepower from windage tray/crank scraper

PackardV8 wrote: Sun May 19, 2019 1:15 pm Other than the Ishihara-Johnson site, where can we send him to read up on what to reasonably expect from a windage tray and crank scraper?

Maybe you will find something useful here:


https://www.collectionscanada.gc.ca/obj ... A-5208.pdf
by dhidaka
Wed May 01, 2019 8:26 pm
Forum: Engine Tech
Topic: Totalseal rings
Replies: 76
Views: 4834

Re: Totalseal rings

Side stepping the Gapless issue. I am getting ready to use TS conventional top ring with nitride coating. I know gas nitriding is a hard coating process only a few thousands thick. Can anyone explain the pros and cons of this process? Advantage over a chrome faced ring?
by dhidaka
Mon Mar 04, 2019 2:45 pm
Forum: Engine Tech
Topic: best liquid for volume measurement of cc
Replies: 76
Views: 6620

Re: best liquid for volume measurement of cc

Glass burette (50cc for motorcycle work) and use Vasoline as lube for petcock. H2O with a only a drop of dishwashing liquid premixed. Once job is completed use a small amount of alcohol to remove traces of water. Petcock hole will remain clean. Windshield washer fluid leaves a residual that clogs th...
by dhidaka
Sun Dec 09, 2018 4:24 pm
Forum: Engine Tech
Topic: Exhaust valve back side radius
Replies: 1
Views: 827

Exhaust valve back side radius

What is the influence the backside radius of exhaust valves on flow/performance/HP-torque? Try 10* nail head and 20* tulip and 26* tulip. For example a 2-valve hemi with 60* exit turn and 45* seats. I assumed the default would be some sort of tulip, but the new PipeMax shows many really Hi-Po engine...
by dhidaka
Sat Oct 27, 2018 7:10 am
Forum: Engine Tech
Topic: Two part epoxy..
Replies: 20
Views: 2387

Re: Two part epoxy..

From JB Weld website: Original J-B Weld can withstand a constant temperature of 500º F. The maximum temperature threshold is approximately 600º F for a short term (10 minutes). Refer to individual product packages for more temperature information. KwikWeld is a great alternative to original J-B Weld...
by dhidaka
Wed Oct 24, 2018 9:12 pm
Forum: Engine Tech
Topic: Toyota Recall High Engine Oil Consumption
Replies: 34
Views: 3875

Toyota Recall High Engine Oil Consumption

Toyota had a recall on 2008 RAV4 engines because of high oil consumption. (Other years/models also included) The recall fix was to replace defective pistons. The pistons were defective because the oil drain holes behind the oil rings were too small and clogged up with engine varnish. Therefore, upda...
by dhidaka
Sat Oct 20, 2018 3:29 pm
Forum: Engine Tech
Topic: Clearance for Cast Iron Piston
Replies: 10
Views: 1565

Clearance for Cast Iron Piston

I know this is not SpeedTalk, per se, but there is a lot of previous experience from others outside of HP engines. I have a Fairbanks Morse low RPM hit-or-miss cylinder (1500 RPM) that needs an oversize piston fitted. Piston measures about 2.375" This is 1 1/2 HP and we are boring about .100 to 2 HP...
by dhidaka
Tue Oct 16, 2018 8:23 pm
Forum: Engine Tech
Topic: Exhaust gas temperture
Replies: 16
Views: 1711

Re: Exhaust gas temperture

On early Jap bikes I was always told when starting a cold engine not to raise the engine RPM over 3000 while using the choke. The idea is that raw fuel is burning down the pipe and causing bluing. I have always abided by that as it makes sense to me. Most are double-walled so bluing is minimal but s...
by dhidaka
Wed Aug 08, 2018 10:09 pm
Forum: Engine Tech
Topic: The other end of the spectrum...slowest American production cars 1960’s to present
Replies: 66
Views: 6666

Re: The other end of the spectrum...slowest American production cars 1960’s to present

I drove from MA to PA for a NASCAR race in a Geo Metro with an auto trans. Turning off the A/C felt like I had a 75 shot of nitrous. They say "Every man has a price to do something if the money is right." My wife has never forgiven me for when I brought a red 1995 Geo Metro home. [-X I guess she th...
by dhidaka
Wed Jul 04, 2018 3:53 pm
Forum: Engine Tech
Topic: Piston to valve on Intake?
Replies: 26
Views: 2446

Re: Piston to valve on Intake?

Have you checked a few degrees after TDC. Depending on cam profile, rod/stroke ratio, the clearance can be less than what it is at TDC. I recently degreed cams on a DOHC motorcycle. The intake valve lifted .018" from TDC to 5* ATDC while piston was dwelling on top. Full valve train was installed. T...