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does any one know if you can put a dohc head on to a 4g54 sohc ? just was thinking

nope, no 4g54 in aus came out dohc.

some rally guys made a DOCH head for the 4G54 in a starion. but mega, MEGA good luck ever finding the location of one, let alone getting one!!!

HKS made a twin cam head for the 4g54b
but forget it its worth more than a house!
cheers stealth

HKS rings a bell. the starion rally team might have gotten their hands on one of them maby. . i think i remember HKS being mentioned in the article

These are the pictures I currently have of the 4G54 Twincam.








Cheers.

Nice pictures. I've tried to find pics of those heads before. Never had any luck.Well done.

It would be good to get hold of one of these heads, do a 3D scan, and get them milled or cast. The cost of buying the head would be more than what you'd get in return for reproducing it. Hopefully someone that has one might be kind enough to lend us one. I also had the idea of using a 3D scan of a 4G63 DOHC head, and modding it to fit the 4G54 block, and then milling one. No matter what you do, to get a DOHC 4G54, it'll cost a heap.

some pri-k has two of them!
that just not right
do we know the power figures that go with them ?
becuase thats the question are thay worth it ,i dont think that thay would make
to much more than a fully preped head with all mods ,thats half the prices so?
the one i seen was on a us stazza and old mate paid $30 grand for the car with engine :wank:
cheers stealth

yeah lol ill forget about it lol
just put some helli coils in mine and should be right

stealth wrote:do we know the power figures that go with them ?

http://www.dsmtuners.com/forums/blogs/s ... -4g54.html
Someone at that forum is saying that destroked to 2.3L, the 4G54 with DOHC produced 209kW/280HP.

Not sure if that was TC or NA. Probably with a turbo. The 2JZ-GTE (3.0L inline 6 twin turbo DOHC) also produces around 208kW from the factory.

well there not good numbers
as a 2.6 with all the fruit and a 8v head with stealth mods makes 240hp at flywheel
at 6280
so twin cam is a waste of time
cheers stealth

stealth wrote:so twin cam is a waste of time

Probably twin cam *as is* would not be worth it. But twin cam + mods might make it worth it, IF the DOHC head was similar price to the SHOC head. If only I had the time, money, and someone with the HKS DOHC head to lend me one to make a copy, I would try it out. The only problem with borrowing a DOHC head and making copies is that it potentially makes the originals drop a bit in price. At the moment they are that expensive that they are pretty much worthless. If only someone that had one would put the money into making reproductions, and actually get something from the head, since they wont be able to flog it off for the amount that it is worth.

Those DOHC head pics made my pants sticky :wank:

Found this, not much info really but worth a look and listen.
http://www.youtube.com/watch?v=FVgin30mVU8

Just a reminder why you don't need twin cams, the old 4g54 does okay, lol
http://www.youtube.com/watch?v=jn7z7cF6pYQ

stealth wrote:well there not good numbers
as a 2.6 with all the fruit and a 8v head with stealth mods makes 240hp at flywheel
at 6280
so twin cam is a waste of time
cheers stealth

about right stealth but they where prob a bigger deal when they were made - getting high figures out of the old astron 1 head
was a lot harder
which was what there were up against - I think an astron 1 ported to the max would still have worse figures than a std M6/7

I agree that the HKS twin cam is a bit of a waste time now but not at the time it was built

yeah true
if we cast them now knowing what we know now we might get some
serious number
problem is ive got a massive wallet but still cant justify it when you can bolt up a turbo
and make over 400 no problem with std ports
so again cant justify wasting time and money going twin cam
and you would be hard pressed beating a 4g63bt anyway
cheers stealth

yeah. i'm with stealth. i think why port and polish a head? just dial in another pound or 2 of boost and there's your extra power

dont get me wrong big boy i still would port match the head and cc the cambers but it would
be nothing overboard and then wind in more boost
cause the astron is good for up to 36psi if your bottom end is right and o,ringed
twincam pffffttttt useless i say
cheers stealth

stealth wrote:cause the astron is good for up to 36psi

I can't remember where it was, but I remember seeing specs for an Astron based drag car that was using 50psi boost.

it would most probably be sakura...which im pretty sure was once the worlds fastest 4 cylinder...please correct me if i am wrong

i used to work in a engine reconditioning workshop in sydney. i knew a drag racer man who worked there who said V8s are the best engine in the world after the holden 202 motor lol, he knew the guy (kevin i think) who ran 50PSi in an astron engine and ran 7's. he filled the block with grout and ran massive boost. he was in a lot of my fast 4's mags in the back in the record section with a 2.6L engine lol i always saw him there, and then my '202' man mentioned him one day he said he ran a standard engine and rebuilt it after 2 or 3 runs lol. didn't know weather to believe him or not cos i know V8s aren't the best lol


ASTRONS ARE lol closely followed by saturns

yes i'm drunk after my first drinking night in 7 weeks lol. astrons aren't THE best. they tye with 2JZ's and 4AGE engines lol

hows this then...

Best 8 = Chev.
Best 6 = RB26
Best 4 = Turbo Astron

well in my book anyways

i gunna have to disagree here
mopar based manowar are the best 8's on the market till later this year, ive heard that a little
gold coast based company are doing RnD on a new style billet block that will kick a=se
then look out
cheers stealth

dvsfin wrote:it would most probably be sakura...which im pretty sure was once the worlds fastest 4 cylinder...please correct me if i am wrong

it was up there not sure what 4 cylinder is quicker but I think they got a 7.45 sec up around the 180 mph
from an astron running 50 psi on a 8.8:1 comp and a good shot of No2
i did read somewhere it was up around 880 hp

and this from a sohc all be it a billit head

Mopar V8's are the shizzle
Astron then 4G63 DOHC then 7AGE then 3SGE then Cosworth BDA for the fours
2JZGTE then RB26DE Autech then 1GGTE then RB20DET then 6G72TT for the sixes

DOHC Astron is porn, but heaps too exxy for my wallet. I can barely afford an Astron 1 head from the wreckers, even with the heavy discount I get lol

Mopar V8's are the shizzle
Astron then 4G63 DOHC then 7AGE then 3SGE then Cosworth BDA for the fours
2JZGTE then RB26DE Autech then 1GGTE then RB20DET then 6G72TT for the sixes

DOHC Astron is porn, but heaps too exxy for my wallet. I can barely afford an Astron 1 head from the wreckers, even with the heavy discount I get lol

did you mean to post that in the 'whats your fav engine' thread? ? lol