So... the first order of business is to acquire a 4AGE - not so easy anymore, this one took about 2 months for my client to find. https://gallery.ostportworks.com/albums/userpics/10005/engine_arrives0.jpg It is an early 1989 (10/1988 built) 4AGE (vin number tag on engine traced using toyodiy) that w...

I was contacted during mid summer by this client. I had just begun OST-070, and he wanted OST-071 for his AE71. https://gallery.ostportworks.com/albums/userpics/10005/recipient_AE71.jpg As you can see, it currently has a clean 4AC engine in it...... https://gallery.ostportworks.com/albums/userpics/1...

Oldeskewltoy, Also, I tried plugging in your flow data and the results weren't that great. I'm not sure how this software calculates efficiency but basically the cfm data says these heads only flow 49% efficient, and I didn't even get 100hp on the "dyno". That didn't sound correct in my o...

carina4age wrote:Yes, i will check top of the block. Do you know what is the correct tightening torque for that gasket? I have new Toyota OEM headbolts. Also, will the timing marks line up with thinner gasket?

Use pattern in FSM. TRD recommended 48ft/#s(650±20 kg･cm). I recommend doing it in 3 passes: 25, 36, 48

Hey, my 16v bigport blew headgasket few days ago and i want to swap it to .8mm trd head gasket to have little bit more power. My engine is completely stock but im going to get the head resurfaced. I just want to know is it possible to use that 0.8 trd gasket with stock engine? yes it is possible to...

3 injectors?? ;) Did I miss something, or: 1) is that an aftermarket dipstick? 2) does that trigger wheel bolt onto a stock crank pulley? Those are the support pedestals, the injectors go between.... https://gallery.ostportworks.com/albums/userpics/10005/tecart_2panel.jpg That is a factory dipstick...

SO another Newbie question :angel: 36cc vs 37cc, is there a sweat spot on a 4age, or is this just to get the correct combustion ratio? What is the standard chamber volume, on a 16V Big port? We are fine tuning final compression ratio. In this case 36cc along with his piston choice, and gasket choic...

So the head has come back from getting its valve job.... https://gallery.ostportworks.com/albums/userpics/10005/core_shift_correcting_and_valve_job_3_panel.jpg https://gallery.ostportworks.com/albums/userpics/10005/new_valve_job_and_ground_valves.jpg then the client asks me if it is too late to add ...

Not sure exactly why but I just love your tarp background pictures. They look a big step up in quality - well done. The close up one of the cam wheels could be straight from a commercial. Maybe it's just the bokeh effect but whatever it is keep doing it :D :thumbs: I hope you dind't have to count a...

Time to get the belt on and set cam timing. But first we have a small problem to deal with... instead of a 116 tooth timing belt, I ended up with a belt with 119 teeth.... https://gallery.ostportworks.com/albums/userpics/10005/timing_belt_2_panel_annoted.jpg ....someone put the wrong belt, into the ...

The efficiency ... What would be a more appropriate value to use? You'd be the guy who would know! Stock bigport vs a port job completed by you. I just estimated 75% since the B-series head was a little over 75% too. Same "style"; twin cam, 16v, etc. And the valves, there honestly wasn't ...

So... this package cleared customs 3 days ago....... what could it be....... https://gallery.ostportworks.com/albums/userpics/10005/Todas_cams_and_valvetrain_kit.jpg A full Toda BSpec valve train kit*... along with a pair of Toda 272 10.3mm cams... :shock: * The BSpec kit is completely different the...

Since you need reliable info... a few corrections.... intake valves are not 29.5, but 30.5. Stock chambers are 36cc

And since you are playing.... what happens if you change the valve sizes from 30.5 to 32, and from 25.5, to 27.5


As to efficiency... how did you calculate that...?????

I have seen people smooth the valve guides down so they are flush with the IN/EX channel, is there any reason for doing this, or is it overdoing it.? good question.... I assume you mean something similar to this..... https://gallery.ostportworks.com/albums/userpics/10005/no_guide_smallport_porting....

Cometic delivered a new .023" (their thinnest) head gasket.... (the deck on this engine was .012" down) making sure it is installed correctly... https://gallery.ostportworks.com/albums/userpics/10005/proper_gasket_alignment_2_panel.jpg If installed incorrectly the red circles are where the...

Just an update... this build hasn't stopped, it's just on a short hold while we fit the drivetrain to the chassis.... https://gallery.ostportworks.com/albums/userpics/10005/normal_20201029_134517.jpg https://gallery.ostportworks.com/albums/userpics/10005/normal_fitting_drivetrain2_-_engine2C_trans2C...

Maybe I have missed this, but you have a big tumble cleaner that are large enough to fit engine heads? :dumb: No, one of the machine shops I use has a large "tumbler" - large enough for blocks! The tumbler is partially filled with zinc shot. They close the lid and the head is dragged repe...

Wow such a historic car, but ive never heard of TRD HD axles !!!!?? TRD used to make bigger axles?? Any specs on this?? neither had I... nor could I find any printed info. What I can say, they were indeed different. One even had what was left of a TRD tag... but of course the part number was comple...

https://gallery.ostportworks.com/albums/userpics/10005/ost-069.jpg OST-069 begins its transformation with a cleaning..... Nasty..... top https://gallery.ostportworks.com/albums/userpics/10005/prior_to_disassembly.jpg and bottom.... https://gallery.ostportworks.com/albums/userpics/10005/disassembled...

A quick look at the "new" bottom end before it gets closed up.... can you spot any new balancing?? https://gallery.ostportworks.com/albums/userpics/10005/assembled_short_block_crank_view.jpg So with the proper head gasket on order, some of the details need further planning... For one... wh...

Jayrdee wrote:
Also, Oldeskewltoy I looked at the valves and they're all ~6mm stems. I think BC is confused on their website.

Doess the diameter of the head measure 27, or 27.5??

spoke to Loynings... max they run is 1mm(.040") oversize

I can ask Loynings...... The end goal is a reliable HPDE weekend / backroads "touge" racer; plenty mid-range power with a decent torque curve. And still be able to drive to work on Monday with no problems. above is why I recommend going with something a bit less challenging**.... maybe BC ...

So, this weekend I'm getting a bunch of Brian Crower 4age stuff in a trade deal. - 1.8L Stroker kit - 83mm stroke with 83mm 11:1 pistons (PN: BC0360) - Intake Valves - 32mm / +1.5mm (PN: BC3362) - Exhaust Valves - 27mm / +1mm (PN: BC3363) - Valve Guides (PN: BC3938/39) - Billet Keepers/Locks (PN: B...

So, this weekend I'm getting a bunch of Brian Crower 4age stuff in a trade deal. - 1.8L Stroker kit - 83mm stroke with 83mm 11:1 pistons (PN: BC0360) - Intake Valves - 32mm / +1.5mm (PN: BC3362) - Exhaust Valves - 27mm / +1mm (PN: BC3363) - Valve Guides (PN: BC3938/39) - Billet Keepers/Locks (PN: B...

over coming "challenges"...... Essentially this is a 2 part job - part one, build the foundational parts(rear cover), part two - make a filler panel . So, the filler panel would need to be light, and strong, and easily shaped - that would hold its shape. https://gallery.ostportworks.com/al...

I wont go into a lecture....... A long time ago (mid 1970s, when I worked for VW) I learned the difference between "it will fit", and, "designed to fit THIS application". I've found I NEVER get the results others seem to achieve by taking short cuts - I do still test this on occa...

When initially building Surreptitious, I had some mirror issues, (I would have liked the vintage Hellas's.... oh well) and somewhat settled on the GT mirrors that I have. https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcSPaFVrDN-SE4iCoPgg28POFK76rX6yLpizkU7IczIh5idowXLnpuO6nR4QgtgWyKLv8y6f9j4...

OK. I'd think that big aluminum ridge around the seat would do more then a bit, but I've got 0 flowbench experience and can only go by what looks aerodynamically pretty to my eye. Thanks. https://scontent.fhio2-2.fna.fbcdn.net/v/t1.0-9/71767363_678576265952246_6405435743317000192_n.jpg?_nc_cat=107&...

So... While this is going into an N2 replica, it is being fitted with timing covers to protect the timing belt, and to keep the cam seal retainers*. This requires some fabrication, as there never was a 7AGE, so the timing covers don't readily fit. Additionally, an idler is being added to the long si...