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Search found 438 matches

by Ken_Parkman
Mon Oct 26, 2020 12:58 pm
Forum: Engine Tech
Topic: 70’s-80’s era low rise single plane intakes
Replies: 19
Views: 984

Re: 70’s-80’s era low rise single plane intakes

I too have had very good luck with the AMC version of the torker; used in many higher performance street and bracket applications.Better on the dyno compared to the newer RPM airgap. The airgap did have better low end which is irrelevant on the street as you cannot hook anyhow. There is a new victor...
by Ken_Parkman
Thu Oct 22, 2020 3:10 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

For reference the head flow is simply remarkable, particularly considering it was a truck engine designed in 1960 with a 1.89 valve. It's a bit weird to flow since 1/2 of the intake manifold is in the head casting. There are 2 inlet openings, each splitting into 3 cylinders. I flowed it with the 1/2...
by Ken_Parkman
Tue Oct 20, 2020 4:18 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

Yes, but I still like them. By far the best looking factory valve cover ever - that's gotta be worth a lot!
by Ken_Parkman
Mon Oct 19, 2020 9:22 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

The only alignment valve guided rocker tips ? You can't quite see from the pics, but looks likely There is a sheet metal alignment retainer the goes on over the cam deck studs and tabs go into the upper ends of the rockers. Not exact, only gets you in the ballpark. There is a welded machined foot o...
by Ken_Parkman
Sun Oct 18, 2020 10:06 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

I've taken 4 of them apart and found damaged cams in 3. The lobes were still there, some with a little nose damage, but the bigger issue seems to be the overlapping rockers cut little grooves in the lobes. Interestingly they changed rockers, cam, and springs very quickly. The early cams were actuall...
by Ken_Parkman
Thu Oct 08, 2020 1:18 pm
Forum: Engine Tech
Topic: 283 pistons, #7003, sealed power??
Replies: 12
Views: 255

Re: 283 pistons, #7003, sealed power??

I have a 85 Speed pro catalog, and it lists 7000, 7001, 7002, and 7005 as SBC pistons. Logical that 7003 is SBC prior to 85.
by Ken_Parkman
Sun Oct 04, 2020 11:12 am
Forum: Engine Tech
Topic: NA Engine With No Damper?
Replies: 69
Views: 2625

Re: NA Engine With No Damper?

Thanks guys, I know nothing about sprint cars. But NO flywheel would for sure add some confusion about dampers. Would a normal one even work? Seems very logical you simply throw the crank away after so many cycles. You cannot argue with what works.
by Ken_Parkman
Sat Oct 03, 2020 10:04 pm
Forum: Engine Tech
Topic: NA Engine With No Damper?
Replies: 69
Views: 2625

Re: NA Engine With No Damper?

The way I understand it is the dual mass flywheel is there to attenuate low frequency vibrations more related to torque pulses. It is a different function, and I do not believe this would have any control on torsional vibrations. You would think the damper should be on the opposite end of the crank ...
by Ken_Parkman
Fri Oct 02, 2020 2:23 pm
Forum: Engine Tech
Topic: NA Engine With No Damper?
Replies: 69
Views: 2625

Re: NA Engine With No Damper?

This of course is a tremendously good question. After seeing first hand the tremendous destructive capability of uncontrolled vibration - how come Sprint cars are OK without a damper?
by Ken_Parkman
Fri Sep 25, 2020 4:53 pm
Forum: Engine Tech
Topic: NA Engine With No Damper?
Replies: 69
Views: 2625

Re: NA Engine With No Damper?

A damper is a sophisticated and engineered device designed to control torsional vibrations, which are a result of the firing impulses acting on the crank. The crank has natural frequencies in it affected by stiffness and the mass of items, and the firing pulses act in combinations called exciting or...
by Ken_Parkman
Thu Sep 10, 2020 1:29 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: Jeep in a crate
Replies: 11
Views: 465

Re: Jeep in a crate

According to Jim Allen in his book the jeep in a crate was real. However he also says the only legitimate ones today are at the bottom of the ocean in the sunken cargo ship. One of the enthusiasts has had a standing major reward for one since probably the 80's, and it has not been claimed as of the ...
by Ken_Parkman
Thu Sep 03, 2020 12:00 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

Here is the chamber. I've found 3 of 4 have the wrong reach plugs; short reach from a flathead.
Combustion Chamber.jpg
by Ken_Parkman
Thu Aug 13, 2020 8:57 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

That's the 12 lobe - you can count the lobes. They dropped the cam down with 1/2 bearings in the head, and the top 1/2 bearings and a cam follower set in an aluminum carrier. The follower and rocker studs must be at the same angle as the valves as the rockers are now angled to allow lobe offset with...
by Ken_Parkman
Thu Aug 13, 2020 1:30 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

Here is another one of the Dodero car running 6.23 in the 1/8th. There are various YouTubes you can find, some claiming 1000 hp which seems a little hard to stomach. But no question some of them make big power.

https://youtu.be/r-nky2Itvw0


Torino head.jpg
Torino cam deck.png
Torino cam.jpg
by Ken_Parkman
Thu Aug 13, 2020 10:00 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: South America Jeep Tornado SOHC engine
Replies: 18
Views: 736

Re: South America Jeep Tornado SOHC engine

That engine originated in 1935 as a Graham flathead 169 cu in engine, grew to 217, got taken over by Continental as a 226, back to Graham which became Frazer, then Kaiser, then Willys, and they did a SOHC conversion with slight overbore in 62. The SOHC definitely had some early design issues that ca...