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Search found 112 matches

by LoganD
Wed Apr 01, 2020 9:32 am
Forum: Engine Tech
Topic: Big block road race build 572
Replies: 51
Views: 2262

Re: Big block road race build 572

Just be careful, you're going to have a hard time making this engine live in a road race situation.
by LoganD
Tue Mar 24, 2020 3:08 pm
Forum: Engine Tech
Topic: Custom V6 EFI intake manifold
Replies: 19
Views: 1483

Re: Custom V6 EFI intake manifold

Cut apart a 2018+ Coyote plastic intake manifold. You're talking about a 7500 RPM engine making 84 lb-ft/L (SAE) through a full exhaust with cats and passing CA emissions. You'd be AMAZED how long the runners in these things are, and how ugly the plenum looks. They taper and have an elliptical runne...
by LoganD
Tue Mar 24, 2020 2:34 pm
Forum: Engine Tech
Topic: Custom V6 EFI intake manifold
Replies: 19
Views: 1483

Re: Custom V6 EFI intake manifold

Why have such a sharp turn? Why transition to round? If you're 3D printing parts there's no reason to go to round. Personally, I'd leave the narrow shape of the runner at the head intact and remove or eliminate the bend letting the runners cross. They do not need to terminate at the plenum perpendic...
by LoganD
Mon Mar 09, 2020 1:19 pm
Forum: Engine Tech
Topic: Dyno graph spike closing throttle
Replies: 1
Views: 495

Re: Dyno graph spike closing throttle

Can anybody explain to me why dyno graphs sometimes show a spike when the throttle is closed? Logic would dictate that the reason this happens is that the throttle bore is too large or that the mixture is lean and when closing the throttle it provides a stronger signal to the carb, thereby enrichen...
by LoganD
Mon Mar 09, 2020 1:04 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 12047

Re: Engine Masters rod ratio test results

This wasn't a very accurate test, I wouldn't read into this too much. The variables were not well controlled. To do this right you'd need an oil conditioning unit, a water conditioning unit, a complete intake air conditioning unit, and a dyno that uses an electric motor with at least two torque mete...
by LoganD
Mon Mar 09, 2020 11:34 am
Forum: Engine Tech
Topic: CAM GUY'S , just when you though theres nothing new
Replies: 39
Views: 3592

Re: CAM GUY'S , just when you though theres nothing new

Now, if we're talking about just WOT MBT conditions, you could potentially make a case that this system in conjunction with VVT would be the ideal setup for maximizing MBT from say....2000-8000 RPM. That's the great part about this system, it has VVT built in. Not only does it decrease and increase...
by LoganD
Mon Mar 09, 2020 10:19 am
Forum: Engine Tech
Topic: CAM GUY'S , just when you though theres nothing new
Replies: 39
Views: 3592

Re: CAM GUY'S , just when you though theres nothing new

Here's why changing duration is more important then changing lift and area, on a variable system. With today's technology, we can change a lot of parameters to make the engine more efficient. Timing, fuel, Intake and Exhaust centerlines, lift, duration, runner length, etc, but the one thing we're n...
by LoganD
Fri Mar 06, 2020 3:23 pm
Forum: Engine Tech
Topic: blow though turbo buick
Replies: 10
Views: 1181

Re: blow though turbo buick

I'm baffled as to why anyone would try to do a blow through carb. Get the Vortech carb box and be done with it.
by LoganD
Fri Mar 06, 2020 2:45 pm
Forum: Engine Tech
Topic: CAM GUY'S , just when you though theres nothing new
Replies: 39
Views: 3592

Re: CAM GUY'S , just when you though theres nothing new

EDIT: VVT is more important/useful for performance than any of the variable duration and lift systems, that's what the aftermarket should be trying to add to older engines. Not even close. Being able to reduce the duration, to control port velocity past the valve, is much more important then moving...
by LoganD
Fri Mar 06, 2020 1:46 pm
Forum: Engine Tech
Topic: CAM GUY'S , just when you though theres nothing new
Replies: 39
Views: 3592

Re: CAM GUY'S , just when you though theres nothing new

BMW's valvetronic is more effective. You can use it over a wider range and it allows you to throttle with the intake valve, reducing pumping loss. Way too complex, and doesn't really change seat duration, just lift and area. It effectively just changes rocker ratio. The problem with increasing rock...
by LoganD
Fri Mar 06, 2020 11:23 am
Forum: Engine Tech
Topic: CAM GUY'S , just when you though theres nothing new
Replies: 39
Views: 3592

Re: CAM GUY'S , just when you though theres nothing new

BMW's valvetronic is more effective. You can use it over a wider range and it allows you to throttle with the intake valve, reducing pumping loss.
by LoganD
Wed Feb 05, 2020 3:15 pm
Forum: Engine Tech
Topic: Contact at comp cams
Replies: 48
Views: 2627

Re: Contact at comp cams

Yep, but no word on what happens with Lunati and Crane. It looks like they were not part of the deal. I have no idea how this is going to turn out, but history tells us that being bought out by a private equity firm, normally doesn't end well. This same private equity firm put a halt to Edelbrock d...
by LoganD
Wed Feb 05, 2020 2:32 pm
Forum: Engine Tech
Topic: Need some help from the forum locating nitriding facility
Replies: 15
Views: 1413

Re: Need some help from the forum locating nitriding facility

The Dark Side of Will wrote:
Wed Feb 05, 2020 11:57 am
LoganD wrote:
Wed Feb 05, 2020 9:36 am
If you want US based, Moldex and Kellogg are no question the best for nitriding depth. I've had Moldex do 1mm depth.
Fancy meeting you here.
I've been here under various names for years!
by LoganD
Wed Feb 05, 2020 9:36 am
Forum: Engine Tech
Topic: Need some help from the forum locating nitriding facility
Replies: 15
Views: 1413

Re: Need some help from the forum locating nitriding facility

If you want US based, Moldex and Kellogg are no question the best for nitriding depth. I've had Moldex do 1mm depth.
by LoganD
Fri Jan 31, 2020 10:28 am
Forum: Engine Tech
Topic: I think we should take a good look at the 445 Thunderjet
Replies: 36
Views: 3333

Re: I think we should take a good look at the 445 Thunderjet

The main determinant of whether this engine will be a good hot rodding candidate is the production volumes. If they make a lot of them, cores are cheap and people will buy parts that will be available and can be priced economically. Hot rodding an obsolete Porsche 928 engine with factory parts pric...