T-Series heads

[toyota1515]

No no, those ports are in the american hemi heads, the ones i took the idea from, i have seen t heads with port changed but it is to much of a work for the gains acheived so it makes no sense go tru all that hassle.

[metcap]

haha, reading back you did say that...my bad

[toyota1515]

Here is a new setup from my friend Joelo Performance in a real stock chassis car that can be driven on the streets and notice the cylinder head, is a billet one!

[NME308]

Damn man..
I only just managed to save my computer from certain death...
The large pool of drool coming from my semi-paralysed mouth had almost engulfed it before I noticed!

Nice looking setup and I hope to hear some figures from it too!

Cheers,
Jason

[MorGo]

Well,I don't say anything about anyone who port heads by boring bar.. If it's that simple why ...

[metcap]

wow!! is that running an electric wtr pump and wtr cooled ic?

[MorGo]

What influence you 1515 have in that engine/head?? You design it?

[toyota1515]

Yes that is running an electric waterpump througout the system, And water to air inter cooler,
And nope i didnt have anything to do with that particular engine right there, but that is an M2 billet head that its ports are almost identical to the ones i do and the only difference is the method of porting and the material of the head itself, they use a CNC i use a milling machine, billet heads are harder and dont tend to crack like the OEM 3TC heads, happens to me couple of times.

[gazza]

my question still seams to remain unanswered though,budget aside (theres bugger all in it anyway) whats the advantages of a 3tc head over a 2tg one?
it looks like the 2tg ones flow a bit better,
valve sizes and chambers are identical.
i'm guessing you could spec the same cams?
maybe valve springs could be an issue on a 2tg?

i'm guessing it just comes down to what people like.i sort of look at it like the rb30 guys.heaps are still sohc and only a few are dohc despite the advantages...

[toyota1515]

my question still seams to remain unanswered though,budget aside (theres bugger all in it anyway) whats the advantages of a 3tc head over a 2tg one?
it looks like the 2tg ones flow a bit better,
valve sizes and chambers are identical.
i'm guessing you could spec the same cams?
maybe valve springs could be an issue on a 2tg?

i'm guessing it just comes down to what people like.i sort of look at it like the rb30 guys.heaps are still sohc and only a few are dohc despite the advantages...

Plain and simple 2TG head is a better flowing head all day every day, BUT, the advantage of the 3TC head is its simplicity and easy to find race parts for it, plus cost factor, for the price of a 2tg head setup you can have 3 or 4 3tc ones, and availability of parts at least here in the USA, the 3tc is way over the 2tg all day, and honestly the power advantage is not that considerable if you put it against cost,

In my personal opinion the whole dual timing chain set up just give me the creeps for how high these 2tg engines car rev, i know Kameari sells lots of upgrades but at prohibited prices.

[J-M kujala]

it looks like the 2tg ones flow a bit better,

yeap, 2TG flow over pushrod, basic cheapo (cleaned) home ported TG heads Flow ~ that near 190Cfm what is near maximum limit of the ported pushrod engine. also TG is possible port ~50 CFM more than 3TC (at stock heads)
But bigger is not always better, so flow and port size is good to be in correct level, not to big, not to small..

valve sizes and chambers are identical.

even TG:s got a little different sizes Combustion chambers, just like pushrod engines got different... like heads from ~73 2T head got bigger combustion chamber than head from 2TB. same bottom but head is different height.. Compression ratios are approx 8.5:1 and 9.4:1 (if remeber correct) so 2TB heads are "Factory shaved"

so the story is i will recommend to measure combustion chamber and calculate ratios !! i have measure 60-67 CC sizes..

Valves, TG got bigger, with use same sizes in Pushrod engine had to change valve seat.. 42mm Valve fit to stock pushrod valve seats and is quite simple upgrade.

i'm guessing you could spec the same cams?

Basicly degrees from valve yes.. with stock valve sizes and about same max flows at head, (pushrod vs TG) TG head just cleaned and pushrod fully ported ~190 Cfm level. Pushrod needs 12+mm lift and TG 10+mm.

maybe valve springs could be an issue on a 2tg?

Depends on what have been done..

Stock double springs.. just to weak (exept full stock motor) singles are stiffer..

First step up is use 2TG Singles with double inner springs.. (oem parts)
then there is some other cheapos available, BugPack double springs.. from VW beetle aircooled engine.. have use different combination with outer and inner with bought stock type outer springs.. and only outer BugPacks
also some CatCam Springs and From Kameari is available..

Kameari specs what i measure ~5 years a go. 38 mm install height ~65 kg at intake side, and ~45 kg in exhaust side.
with ~12 mm lift at bought side. 80-90 kg open pressure.

its quite compromise of parts available, what can do personally, and what is doing... and what is needed... but its sure pushrod engine is a lot more simple and give more space under hood. ..

Those are just my own opinions

[metcap]

Mine one 2T Head.. use that in my 184 hp street "T" engine with 284 cam..

anyone got pics of the exhaust ported or polished?

[J-M kujala]

Mine exhaust on that head where is that intake port, got just cleaned stock ports. Nothing big things..

[ctrain]

just a quick thread revival, what would be better suited for a turbo, a 3t bottom with a 2t head which is mildly ported, double valve springs and a better cam, or just get a 3tc and turbo that?

Dan (hurricane) has a stock 3tc turbo with double valve springs and that is a good setup for the street, or would a 3t/2t turbo be better?

[stidnam]

the 2t/3t would be better seeing as you are talking about a better cam so you could get a turbo cam and reap the rewards it has to give over the stock 3t cam