Lit'lphant - Toyota's Hemi V8

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oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Thu Feb 20, 2020 10:39 am

Drum roll please...........

Image



more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Fri Feb 21, 2020 8:41 am

oldeskewltoy wrote:Getting the flowbench prepped for the 5V-EU head.....


.... and getting the 5V-EU head ready for the flowbench..


more to come..... :D


I spent a while looking, but never found anyone who had flowed a 5V head before... so I did.

Image



That is pretty good, especially considering valve size.



As to bench racing numbers, that port should support up to about 340-360 n/a hp


more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Thu Feb 27, 2020 12:44 pm

Image


centerlines are now known... and my guess was wrong........   I had thought they were 116+ do to the smooth idle, and the short powerband...  I was wrong!   The cam has a 110 degree centerline....  no need to screw with moving it!   So, the word is out to the cam grinder that we want to twist this baby to 6000, and to get as much lift as we can - do to base circle, valve lift will be about .450"


more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

Nick94tt
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Re: Lit'lphant - Toyota's Hemi V8

Postby Nick94tt » Thu Feb 27, 2020 4:55 pm

Woot.

I'd wondered how long you would be forced to chase the head gasket before I quietly chipped in the custom cut annealed copper idea. Local race shop was fond of it when they did oddball motors or o-ringed setups. I know they did more than a few sans rings, not sure if they were race team service interval type builds tho.

I know they sent more than a few out the door that way - but they also used to sell other customers "new" parts that came out of other vehicles in the shop and randomly bolt things back up without the right internals. :evil:

Happily they went under pretty much right when I heard this from some acquantainces that worked there.

Less happy is how they finished that process - depending on your outlook :lol:

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oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Thu Apr 30, 2020 10:46 am

Typically when you order new pistons, you plan for an overbore...

Image


The cylinder liners are in very good condition, with no ridge at all, and only the very top of the bores no longer showing hone marks.... but the liners are likely a few ten thousandths different... so the intention at the shop now is to re-hone, and set all bores to within one ten thousandth (.0001"). With that final figure, I'll pass that along to Traum pistons so we can have the pistons made to the bores, instead of the other way around....

This was done about a week back... the results were all the liners were nominally under 87mm, so all the liners will be honed to 87.0008mm, or 3.4252"


Along with knowing the bores, the chamber volumes are also now known.... 68cc

Image


and a bit more... note a small "squish" band around the entire piston... also note the valve reliefs are symmetrical, and yet the valves in the head are not....

Image




Those domes are pretty shallow... estimated to be 13cc...

Image

OST wrote:also note the valve reliefs are symmetrical, and yet the valves in the head are not....


This has everything to do with overall piston balance... if the pistons were to only have the intake relief, they would be much tougher to balance, BUT they would also be very expensive, as the engine would need 4 sets of 2 pistons. This is because the wrist pin is offset - you can see this in the side view of the piston. My new pistons will have a dome of 21cc, and the valve reliefs will be .060" deeper.... :geek:


more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Wed May 06, 2020 8:07 am

oldeskewltoy wrote:Those domes are pretty shallow... estimated to be 13cc...


Actually... they were 10cc, so static CR on the 5V is(was) under 9:1.... :(


Thank you Traum Piston - With their help, this is what my 5V will be running..... instead of 10cc, this piston has a 21cc dome

Image


10.30-10.35:1, with slightly deeper (.060") valve pockets. Because the piston has an offset wrist pin, essentially that is 2 sets of 4.



more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Fri May 08, 2020 9:45 am

I spoke to the cam grinder this morning, I now have the specs on the stock 5V-EU cam.

Intake 240 overall, 182.2@ .050" lift, exhaust 247 overall, 182.8@ .050" lift. Lobe lift is .240" Centers are 110
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Wed May 27, 2020 2:38 pm

A lot has, and is happening.........

1) Their here... the new pistons......

Image


and........

2) in another forum a Russian member spoke of a 1SU(2SU) Toyota engine - (predecessor to the 3S?) and its flywheel(SX70 chassis code, possibly SX60, and ST141 as well).... It seems to be VERY close in size to the 5V-EU flexplate.

Part number: 13405-69036, possibly also 13405-63010



Image

Image



As there isn't one of these in the USA..... The 2S engine did make it to the USA... in the 83-86 Camry. It is also 6 bolt... and I've confirmed the ring gear is 11.588"(Rock auto), I measure the 5V @ 11.6". the part number is different, but I have one coming from a salvage yard to see how close it actually is... $70 gamble

Image


more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
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Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Fri Jun 05, 2020 3:59 pm

Image

Alright... the 2S flywheel will "fit" the 5V crankshaft.... YES

The center hole fits the crank snout, and the bolt spacing is correct. What is still unknown is if we will need a step/shoulder type bolt or not, and what the back spacing is - we'll need the crank in the block, and the starter fitted to verify back spacing.


more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

Nick94tt
Club4AG Expert
Posts: 250
Joined: Mon Jan 13, 2014 9:43 am

Re: Lit'lphant - Toyota's Hemi V8

Postby Nick94tt » Fri Jun 05, 2020 8:50 pm

Nice. Coming down to "hey there buddy with a lathe..." bits.

Because everybody needs a buddy with a lathe. :D

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oldeskewltoy
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Re: Lit'lphant - Toyota's Hemi V8

Postby oldeskewltoy » Fri Jul 17, 2020 7:33 am

Nick94tt wrote:Nice. Coming down to "hey there buddy with a lathe..." bits.

Because everybody needs a buddy with a lathe. :D


and I know somebody with a lathe....

making a new window stop because Toyota no longer does....
Image


But for now I'd rather talk about someone else's handy-work for now - https://cpr-manufacturing.com/



As far as I know.... this is the first AR5 (American R154) adapted to fit a stock 5V bell housing.....

Image

Image


It also allows me two transmission options..... if I desire

Image


definitely.... more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

Nick94tt
Club4AG Expert
Posts: 250
Joined: Mon Jan 13, 2014 9:43 am

Re: Lit'lphant - Toyota's Hemi V8

Postby Nick94tt » Mon Jul 27, 2020 11:59 am

Very nice. My neighbor looked at me like I was crazy when I told him to save the chunk of delrin we cut off the snow plow blade I repaired for him.

I'm a sucker for billet aluminum, nice looking adapter.

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