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Search found 3057 matches

by mag2555
Fri Sep 18, 2020 6:46 am
Forum: Engine Tech
Topic: More 312 Ford Y block problems
Replies: 7
Views: 246

Re: More 312 Ford Y block problems

I have seen these where not only where the Cam Bearing( s) are out of alignment to each other in a Horizontal plane, but a few of the bulk heads where off in a vertical plane also. The result of this even if you can shave them or even pour new ones is reduced load support area supplied by the Bearin...
by mag2555
Wed Sep 16, 2020 12:05 pm
Forum: Engine Tech
Topic: Ford Windsor 408's HP Plateaus @ 5,600
Replies: 34
Views: 816

Re: Ford Windsor 408's HP Plateaus @ 5,600

What! 325 advertised duration from only 258 @ .050"?
by mag2555
Wed Sep 16, 2020 6:11 am
Forum: Engine Tech
Topic: Ford Windsor 408's HP Plateaus @ 5,600
Replies: 34
Views: 816

Re: Ford Windsor 408's HP Plateaus @ 5,600

In those Cam lift spec's you posted how is it that two different lobe lift numbers give the same amount of gross valve lift?
by mag2555
Mon Sep 14, 2020 6:17 am
Forum: Engine Tech
Topic: Intake manifold porting
Replies: 11
Views: 764

Re: Intake manifold porting

As with anything flowing something you want to work on the main restriction point(s). In that Intake you want to address the tightest part of the bend in each runner from the exit of the Plenum to the head flange. This at the runner to head flange interface on this Manifold and what you want to do t...
by mag2555
Sat Sep 12, 2020 6:09 am
Forum: Engine Tech
Topic: Jet size increase
Replies: 3
Views: 312

Re: Jet size increase

Jet remember that if you do not use the high tolerance Holley jets that going up to what you would think would be a 1 step fatter jet may not actually be richer then what you where running!

Sometimes you need to go up 2 jet sizes to really go up only 1 jet size!
by mag2555
Fri Sep 11, 2020 6:03 am
Forum: Engine Tech
Topic: Flat top -small chamber VS dish piston - smaller chamber
Replies: 15
Views: 2250

Re: Flat top -small chamber VS dish piston - smaller chamber

While on the subject of Pistons let it also be mentioned that running a piston with the ring pack as close to the deck of the piston as possible without burn thru's helps to make greater levels of power due to having less fuel on the cylinder walls along with the benefit of having the top part of th...
by mag2555
Thu Sep 10, 2020 12:12 pm
Forum: Engine Tech
Topic: Spot lights.
Replies: 5
Views: 262

Re: Spot lights.

I need to ask a question here PDQ67, that being if can get on this site to post up questions or whatever, then why the heck can't you just do a search and find this info out for yourself?

It seems to me you do this type of thing constantly if you don't mind me saying!
by mag2555
Thu Sep 10, 2020 5:53 am
Forum: Engine Tech
Topic: 550 hp?
Replies: 4
Views: 423

Re: 550 hp?

In terms of predicting Hp out of a race built motor from having the Intake flow numbers in hand taken at 28" here's a common formula that works well. Flow at 28" x .598 Example 300 x .598 = 179.4 Then take 179.4 x .43 Result = 77.1. This is the potential HP per cylinder. This hp number in terms of a...
by mag2555
Wed Sep 09, 2020 12:09 pm
Forum: Engine Tech
Topic: 550 hp?
Replies: 4
Views: 423

Re: 550 hp?

Those heads should flow close to 280 Intake cfm @ .500" lift to .550" lift.
I have made with no effort 493 hp with a Hydro roller with .530" lift, a 260 cfm head and even then it only took 240 cfm or so to make that 490 plus hp, so you with your combo should have no problem making 550 hp !
by mag2555
Tue Sep 08, 2020 9:13 am
Forum: Engine Tech
Topic: Flowing carbs
Replies: 8
Views: 424

Re: Flowing carbs

Bingo!
by mag2555
Tue Sep 08, 2020 6:18 am
Forum: Engine Tech
Topic: Flowing carbs
Replies: 8
Views: 424

Re: Flowing carbs

The above 20.6" H2o is correct for a 4 bbl, the 3" test point for a 2 bbl is twice that at inches or water.
by mag2555
Mon Sep 07, 2020 6:02 am
Forum: Engine Tech
Topic: Jetting question
Replies: 7
Views: 422

Re: Jetting question

Since your expecting a 20% increase in HP I would start off on the safe side and bring up the primary jets by 2 sizes and the secondary s by 3 sizes and also maybe start off with a spark plug one heat range cooler then what you where running. If you have gone up in the motors cid and or cam size to ...
by mag2555
Mon Sep 07, 2020 5:58 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Offy?
Replies: 8
Views: 287

Re: Offy?

Offy Manifolds are in no way shape or form cutting edge these days, so if your looking for a nastalgic look that fine, but done expect top notch power.

That all being said the long runners of there tunnel ram intakes where very streetable!
by mag2555
Sun Sep 06, 2020 5:51 am
Forum: Engine Tech
Topic: 950 Dominator on a dual plane
Replies: 9
Views: 430

Re: 950 Dominator on a dual plane

The main thing 99% of the duel plane's love for better power is atleast a 1" open spacer.
by mag2555
Sat Sep 05, 2020 6:02 am
Forum: Engine Tech
Topic: 950 Dominator on a dual plane
Replies: 9
Views: 430

Re: 950 Dominator on a dual plane

I would say atleast a 420 cid motor that was built to make 650 hp at 7500 rpm, with a running power band above 5500, or a smaller cid motor making that same HP or better spinning to 8500 to 8800.