13 replies to this topic

[Bob Riebe]

https://www.youtube....h?v=8-780OUaxCc

 

 

 

Jessel V-8

 

Here are a couple more videos from other PRI shows; the first one has the feeling of how private industry mechanics dudes would see the show, while the second is professionally produced by industry insiders.

 

https://www.youtube....h?v=vBOpHofqImI

 

https://www.youtube....h?v=SJ4LsH3yyww

Edited by Bob Riebe, 11 October 2022 - 15:21.

[Magoo]

The Jesel Equal 8 is a very clever thing. 

 

It's like a NASCAR engine but without the NASCAR dimensional resrictions. 

 

Or, what if a valvetrain expert built a pushrod V8 based on an optimal valvetrain, and designed the rest of the engine around it. 

 

The results are impressive, too. 

[desmo]

Single cam pushrod vee engines will always be far more elegant designs than four cam OHC designs.

[Magoo]

Single cam pushrod vee engines will always be far more elegant designs than four cam OHC designs.

 

The pushrod V8 is a beautiful thing, a simple and compact package. Also hard to beat in horsepower per dollar for enthusiasts. 

 

In the end, it was only beaten for production cars by DOHC V8s. With cam phasers they can achieve 100 percent VE throughout much of the torque range, and beat the emissions numbers, too. 

[Lee Nicolle]

The pushrod V8 is a beautiful thing, a simple and compact package. Also hard to beat in horsepower per dollar for enthusiasts. 

 

In the end, it was only beaten for production cars by DOHC V8s. With cam phasers they can achieve 100 percent VE throughout much of the torque range, and beat the emissions numbers, too. 

Currently Ford v Chev. The big fat Ford has less power than the svelte Chev.

I wonder about these special engines. Most forms of motorsport are based on production  engines. 

Otherwise costs go over the moon. I saw a clip on Mel Kenyon saying his older engines cannot keep up with the Toyotas. Which are very expensive as well as expensive to maintain. And must be done very regularly.

410 Sprintcar engines are the same. 

Edited by Lee Nicolle, 31 October 2022 - 09:09.

[Wuzak]

Currently Ford v Chev. The big fat Ford has less power than the svelte Chev.

 

The Coyote is wider than an LS, but lighter.

 

Interestingly, the Coyote is around 29" wide, and the Rolls-Royce Merlin (SOHC, 4V per cylinder) is only 30" wide!

[Lee Nicolle]

The Coyote is wider than an LS, but lighter.

 

Interestingly, the Coyote is around 29" wide, and the Rolls-Royce Merlin (SOHC, 4V per cylinder) is only 30" wide!

All those cams make the engine heavier,, and top heavy as well. I have read various figures but the running engine has to be a lot heavier. They do sound good though. But so does a Cleveland and that is a big heavy lump. Ford go from small to large with small blocks,, Windsor to Cleveland and it big brother the M.

And Windsor to 4.6 and then all the various other multicam lumps. Try a 5.4 iron block as fitted to Aussie Falcons. A huge lump

As for the Merlin?  I would suspect a good deal wider as the stroke is very long and that effects height. And the bore is quite large as well

For 27 litres they are not huge abut a LOT longer than say yout Jag V12

[Wuzak]

All those cams make the engine heavier,, and top heavy as well. I have read various figures but the running engine has to be a lot heavier. They do sound good though. But so does a Cleveland and that is a big heavy lump. Ford go from small to large with small blocks,, Windsor to Cleveland and it big brother the M.

And Windsor to 4.6 and then all the various other multicam lumps. Try a 5.4 iron block as fitted to Aussie Falcons. A huge lump

As for the Merlin?  I would suspect a good deal wider as the stroke is very long and that effects height. And the bore is quite large as well

For 27 litres they are not huge abut a LOT longer than say yout Jag V12

 

Merlin with 2 speed supercharger is approximately 30 inches wide, 40 inches tall, and 88 inches long (762mm x 1,106mm x 2,235mm). Stroke is 6 inches (152.4mm) and bore 5.4 inches (137.16mm).

 

It is a 60° V12, so that helps with the width.

 

Why does the "the running engine has to be a lot heavier"?

[carlt]

https://www.youtube....h?v=8-780OUaxCc

 

 

 

Jessel V-8

 

Here are a couple more videos from other PRI shows; the first one has the feeling of how private industry mechanics dudes would see the show, while the second is professionally produced by industry insiders.

 

https://www.youtube....h?v=vBOpHofqImI

 

https://www.youtube....h?v=SJ4LsH3yyww

All that loveliness, but still a cam driven distributor ?

[Lee Nicolle]

Merlin with 2 speed supercharger is approximately 30 inches wide, 40 inches tall, and 88 inches long (762mm x 1,106mm x 2,235mm). Stroke is 6 inches (152.4mm) and bore 5.4 inches (137.16mm).

 

It is a 60° V12, so that helps with the width.

 

Why does the "the running engine has to be a lot heavier"?

The accescories make the engines bigger and heavier. Whatever engine,, but start with  a big lump and it becomes huge quite easily

[Lee Nicolle]

https://www.youtube....h?v=8-780OUaxCc

 

 

 

Jessel V-8

 

Here are a couple more videos from other PRI shows; the first one has the feeling of how private industry mechanics dudes would see the show, while the second is professionally produced by industry insiders.

 

https://www.youtube....h?v=vBOpHofqImI

 

https://www.youtube....h?v=SJ4LsH3yyww

I can see the obvious weak point. The cam drive to the dissy looks suss, and the hex oil pump drive is prehistoric. And as so many know a point of failure. I have seen both Fords and Mopars strip those hex drives. With a standard oil pump. High volume pumps are an increased problem.

IF they must put the pump there at least tooth belt drive it. A multi stage dry sump pump uses a lot of power and they also chatter a lot. The scavenges.

Edited by Lee Nicolle, 16 November 2022 - 07:55.

[Magoo]

Dan Jesel, the creator of the Jesel Equal 8, passed away this week. He was probably the sharpest guy in the world on pushrod valvetrains. 

[Lee Nicolle]

So many innovators are dieing,,as happens with old people. Though some are getting very old. RIP Dan.

Worse thing though these companies are taken over by corporations that have far less idea what the customer requires.

[Magoo]

So many innovators are dieing,,as happens with old people. Though some are getting very old. RIP Dan.

Worse thing though these companies are taken over by corporations that have far less idea what the customer requires.

 

Quite true. The traditional speed equipment market is shrinking and the industry is in a consolidation phase, so companies are merging and right-sizing. Also, many of the owners are at or  past retirement age. Private equity firms are moving in, buying and combining companies to reduce operating costs. Unfortunately, their playbook often includes wringing out the last of the profits without regard for the company or its customers, and then selling off the remaining assets. 

 

In this scenario, the owner/founder is told he will be staying on as chairman or consultant to oversee his life's work, only to find out weeks later that he is a powerless figurehead in the new regime. 

 

This has happened to more people I know than I wish to count.