We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Search found 91 matches

by Paul Kane
Wed Mar 25, 2020 8:36 pm
Forum: Engine Tech
Topic: Ford DS II ignition upgrades?
Replies: 15
Views: 591

Re: Ford DS II ignition upgrades?

How does well does the Duraspark II ignition system work in a mild to medium level performance application? At what point does it become necessary to either upgrade or replace with something better? I’ve got a crane adjustable vacuum advance kit with different springs to modify the advance curve. T...
by Paul Kane
Sun Feb 23, 2020 5:35 pm
Forum: Engine Tech
Topic: Best race valve material
Replies: 35
Views: 2441

Re: Best race valve material

Valve failure is the head snaps off. When the valve head breaks off the stem, the problem is typically the result of non-concentric valve face to seat contact area. Check your valve job very carefully for full and exact concentricity. When the seat and valve face are not exactly concentric it puts ...
by Paul Kane
Tue Dec 31, 2019 6:55 pm
Forum: Engine Tech
Topic: Rockers too high on the studs?
Replies: 70
Views: 2967

Re: Rockers too high on the studs?

The roller tips look real big. Yes, absurdly so. The roller wheel on the tip of a roller rocker should be as small as is physically possible. Ideally, the radius of the roller wheel should be the same as the radius of the pushrod cup .....but usually that isn't physically possible. Most manufacture...
by Paul Kane
Tue Dec 31, 2019 6:50 pm
Forum: Engine Tech
Topic: Rockers too high on the studs?
Replies: 70
Views: 2967

Re: Rockers too high on the studs?

Are we still discussing how to set proper geometry for SBC rockers on a SBF? A rocker arms does not know which manufacturer affiliation it is assigned--hell, even rocker arms from various manufacturers, all of which are intended for a specific engine (ie, all of them made for an SBC), have geometri...
by Paul Kane
Tue Dec 31, 2019 3:55 pm
Forum: Engine Tech
Topic: Rockers too high on the studs?
Replies: 70
Views: 2967

Re: Rockers too high on the studs?

In the photo, the valves are closed. Travis then your 8.00" pushrod is way too long as evidenced by the geometric angles with the rocker at rest/closed, and as extrapolated therefrom if opened halfway and at full lift: BSRockerSetup.jpeg As seen above, the rocker arm is already over-arcing on the p...
by Paul Kane
Tue Dec 31, 2019 3:47 pm
Forum: Engine Tech
Topic: Rockers too high on the studs?
Replies: 70
Views: 2967

Re: Rockers too high on the studs?

The pivot level should be about 1/2 of lift below the valve tip, measured along the axis of the valve. JohnsMistake.jpeg So, your pushrod is way too long. John, this is erroneously drawn. The imaginary red line to the tip of the rocker arm should reach the roller wheel's axle, not the radius of the...
by Paul Kane
Sun Dec 29, 2019 5:32 pm
Forum: Engine Tech
Topic: ARE ALL sbc 010 BLOCKS HIGH NICKEL????
Replies: 96
Views: 25632

Re: ARE ALL sbc 010 BLOCKS HIGH NICKEL????

I can't believe this rumor still floats round. :lol: The ASTM recipes for grey iron do not call for any nickel. Furthermore short of converting it to steel, iron is best strengthened by adding small percentages of magnesium carbon etc to bring about spheroidal-moleculed ductile iron, of which no cyl...
by Paul Kane
Sun Dec 29, 2019 5:13 pm
Forum: Engine Tech
Topic: Rockers too high on the studs?
Replies: 70
Views: 2967

Re: Rockers too high on the studs?

https://www.speed-talk.com/forum/download/file.php?id=23408&mode=view First of all, how is the rocker positioned in the picture? Is the rocker arm at rest with the lifter on the base circle of the cam and the valve closed? Or is the rocker arm at mid-lift? Or is it at full open? :arrow: Please spec...
by Paul Kane
Tue Dec 03, 2019 9:38 pm
Forum: Engine Tech
Topic: Welded stroker cranks.
Replies: 20
Views: 2762

Re: Welded stroker cranks.

'm old time going back to Reath Automotive in Long Beach CA. SKeown Then go to Joe Castillo in La Miranda. Castillo’s Crankshaft Service. Joes been doing this for decades, started somewhere else like LA Crank or under Henry Velasco back on the early 1980’s (not sure exactly where) and has had his o...
by Paul Kane
Tue Nov 19, 2019 2:45 pm
Forum: Engine Tech
Topic: Rocker stud angle.
Replies: 17
Views: 990

Re: Rocker stud angle.

...It is a 4580 rocker Paul and yes my understanding is that the b/t 3.6 is the same cleveland angles. We purchased valves to match our spring and cam requirements however looking at the rocker geometry now it will not work with midlift 1.8. If I recall correctly, that rocker arm is designed for an...
by Paul Kane
Thu Nov 14, 2019 3:00 pm
Forum: Engine Tech
Topic: Rocker stud angle.
Replies: 17
Views: 990

Re: Rocker stud angle.

Im working on a smallblock ford with blue thunder 3.6 heads. We had a set of a3 heads before this. We used a 1.8 rocker on previous setup but on this head i have the rocker contacting poly lock just before full lift. Same cam etc. Is it likely the rocker stud location is in different spot? Steve.k,...
by Paul Kane
Mon Aug 05, 2019 1:00 pm
Forum: Engine Tech
Topic: Oil galley fitting
Replies: 34
Views: 1393

Re: Oil galley fitting

(D/P)
by Paul Kane
Mon Aug 05, 2019 12:58 pm
Forum: Engine Tech
Topic: Oil galley fitting
Replies: 34
Views: 1393

Re: Oil galley fitting

4vpc wrote:
Sun Aug 04, 2019 2:11 pm
It's a gallery not a galley.
A Galley is a type of ship.
Not exactly.

“Gallery” refers to a passageway.

A “galley” is the kitchen on a ship.
by Paul Kane
Sun Jul 07, 2019 8:17 pm
Forum: Engine Tech
Topic: ford 460 dome piston
Replies: 2
Views: 409

Re: ford 460 dome piston

Be aware that the features of the L2443 dome top piston changed several times over the years. It would be ideal to find one with similar features but if that’s not possible then I suppose weight matching whichever other version you end up with will suffice (dome was always 0.339” tall). From the ori...
by Paul Kane
Sun Aug 26, 2018 11:54 am
Forum: Engine Tech
Topic: BBC 2618 Icon Piston .008 piston to wall
Replies: 23
Views: 5416

Re: BBC 2618 Icon Piston .008 piston to wall

Has anyone ever run an Icon 2618 BBC piston in a street engine with .007 to .008 piston to wall clearance? Icon recommends PtW .0045-.0055 for street NA. Will the engine beat itself up or just be a little noisy until it warms up? 492 BBC with 10:1 compression Thanks I’ve known race engines that ran...