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Search found 3105 matches

by mag2555
Tue Dec 01, 2020 12:23 pm
Forum: Engine Tech
Topic: Custom Spring Locators
Replies: 14
Views: 297

Re: Custom Spring Locators

Needed to fit what?
by mag2555
Mon Nov 30, 2020 9:08 am
Forum: Engine Tech
Topic: Olds #5 heads
Replies: 4
Views: 369

Re: Olds #5 heads

By the way, I have found my own Butt gauge to be far more accurate in terms of starting line Torque then HP over the years,lol!
by mag2555
Mon Nov 30, 2020 6:01 am
Forum: Engine Tech
Topic: Olds #5 heads
Replies: 4
Views: 369

Re: Olds #5 heads

Maybe you should get a flow test of the heads done to nail down the hp potential of the heads and not the go by hp gauge built into the seat of your pants come next year! ?
by mag2555
Sun Nov 29, 2020 6:27 am
Forum: Engine Tech
Topic: Olds #5 heads
Replies: 4
Views: 369

Re: Olds #5 heads

You need to get your heads flow tested! If the Intake side flows 250 cfm@28" at .500" lift without regressing, and the Exh side flows 180 cfm@28" at that same .500" lift then you will make 500 hp. This assumes your pick of intake manifold can flow that 250 cfm also. Judging by the picture of the Int...
by mag2555
Fri Nov 27, 2020 6:31 am
Forum: Engine Tech
Topic: Head Port Advice Old 409
Replies: 26
Views: 1295

Re: Head Port Advice Old 409

Port wall thickness on GM castings with no core shift or internal rust will average out to .180", so if you go by the fact that for a given valve size to begin to produce the flow numbers it can, then the valve bowl throat to valve size percentage needs to be a minimum of 85. Is short I do not think...
by mag2555
Fri Nov 27, 2020 6:24 am
Forum: Engine Tech
Topic: 434" Windsor build Predictions
Replies: 9
Views: 476

Re: 434" Windsor build Predictions

Flow wise if you net .650" lift after lash you have enough air flow to make 700 hp In NA form, yes!
by mag2555
Tue Nov 24, 2020 6:19 am
Forum: Engine Tech
Topic: Head Port Advice Old 409
Replies: 26
Views: 1295

Re: Head Port Advice Old 409

Well if your running enough lift to access atleast 310 cfm from your Intake ports and in that same lift range your Exh flow ratio is averaging 68% you should beable to make 700 hp, which should get you into the 9s if the intake manifold your running can pass that much cfm! ?
by mag2555
Mon Nov 23, 2020 12:17 pm
Forum: Engine Tech
Topic: Head Port Advice Old 409
Replies: 26
Views: 1295

Re: Head Port Advice Old 409

I would like to know also what the average Exh to Intake flow ratio is within his range of valve lift from his Cam?
by mag2555
Mon Nov 23, 2020 7:08 am
Forum: Engine Tech
Topic: Dart Pro1 227 Platinum vs older 227
Replies: 5
Views: 517

Re: Dart Pro1 227 Platinum vs older 227

There good , but the Platinum ones make more hp per cfm so if your reaching for every last scrap of power out of your build they will assist that goal!
by mag2555
Mon Nov 23, 2020 6:06 am
Forum: Engine Tech
Topic: Head Port Advice Old 409
Replies: 26
Views: 1295

Re: Head Port Advice Old 409

Your intake valves should not have a angle on there chamber side face, they should be a chisel.

A angle on the face is the start of low lift low velocity reversion.

What is the current ID of the valve bowl and what is the port area on the crown of the short turn, and what is the minimum port area ?
by mag2555
Sun Nov 22, 2020 6:07 am
Forum: Engine Tech
Topic: Crankshaft polish
Replies: 16
Views: 1161

Re: Crankshaft polish

From the federal Mogal Bearing book in reguards to cast cranks .
by mag2555
Thu Nov 19, 2020 12:17 pm
Forum: Engine Tech
Topic: Question about Little M main cap material.
Replies: 12
Views: 778

Re: Question about Little M main cap material.

1000 hp out of how many cylinders are we talking and what stroke,main journal size and rpm?

It's the G force loads that matter more then the hp since they go up with the square of the rpm seen.
by mag2555
Fri Nov 13, 2020 6:12 am
Forum: Engine Tech
Topic: BBC 427 Pistons
Replies: 15
Views: 578

Re: BBC 427 Pistons

Is this a resto where you want to keep the overbore to a minimum?

If not then open the wallet up bigger and go for the custom Pistons in a bigger Bore size, then you can save the cost of milling the heads or block deck and yet unshroud the chambers for higher power at the same time.
by mag2555
Tue Nov 10, 2020 6:16 am
Forum: Engine Tech
Topic: P/V clearance measurement techniques
Replies: 21
Views: 1052

Re: P/V clearance measurement techniques

For a quick check other then for radius clearance and if it's a solid Cam just keep stacking thicker and thicker feeler gauges inbetween the rocker arm tip and the valve stem until the motor looks up.

That feeler gauge stack height is your PVC.
by mag2555
Sun Nov 08, 2020 6:24 am
Forum: Engine Tech
Topic: Brodix Iron BBC Blocks?
Replies: 9
Views: 867

Re: Brodix Iron BBC Blocks?

Looks like a easy out of the box 650 to 700 hp on pump gas to me!