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Engine Specific Info and Questions => IDI Engine => Topic started by: wakeboard4life07 on April 12, 2011, 08:58:26 am

Title: Mech head on Hydro block??
Post by: wakeboard4life07 on April 12, 2011, 08:58:26 am
So i have a little issue. Cant seem to find a hydro block anywhere around me. I have a couple mech heads laying around, but am not sure if i can make it work?
Title: Re: Mech head on Hydro block??
Post by: 8v-of-fury on April 12, 2011, 09:03:58 am
I would think that if physically hydro heads have been fit to mech blocks with doing nothing else than blocking the extra oil drain in the head... Then you have no oil drain there should be able to put a mech head on a hydro block..

In theory it works in my head LoL
Title: Re: Mech head on Hydro block??
Post by: R.O.R-2.0 on April 12, 2011, 09:37:29 am
I would think that if physically hydro heads have been fit to mech blocks with doing nothing else than blocking the extra oil drain in the head... Then you have no oil drain there should be able to put a mech head on a hydro block..

In theory it works in my head LoL

you would be plugging up ports in the block, instead of the head..
Title: Re: Mech head on Hydro block??
Post by: arb on April 12, 2011, 09:41:07 am
And the nice thing about this drain plug is that it would prevent rain water / dirt from getting into the pan, rather than the head plug of keeping oil in the engine.
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 12, 2011, 08:03:19 pm
well the thing is, i had a mech head on the block at one point, although was sketched out about the port. so i pulled the head off and it seemed that all of the ports lined up and all the water jackets lined up. didnt know if i missed anything or not. wasnt sure if someone had done it before or not.
Title: Re: Mech head on Hydro block??
Post by: RabbitJockey on April 12, 2011, 08:29:47 pm
I would think that if physically hydro heads have been fit to mech blocks with doing nothing else than blocking the extra oil drain in the head... Then you have no oil drain there should be able to put a mech head on a hydro block..

In theory it works in my head LoL

you would be plugging up ports in the block, instead of the head..

when using a mechanical head on hydro block you have to block both, because a water jacket over laps the extra drain hole, regardless of what head gasket you use they both will need plugged, the head most of all
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 14, 2011, 11:26:40 am
but i guess is what im wondering, is has anyone done this and successfully made it work?
Title: Re: Mech head on Hydro block??
Post by: R.O.R-2.0 on April 14, 2011, 11:30:59 am
but i guess is what im wondering, is has anyone done this and successfully made it work?

dont know of anyone doing this, but i dont see why it couldnt be accomplished?
Title: Re: Mech head on Hydro block??
Post by: Powered by Spearco on April 14, 2011, 02:35:45 pm
We at the shop just had an '80 pickup come in for a post purchase inspection. It failed in every way just for the fact that the PO had a mech. head on a hydro block. The coolant was pressureized instantly, oil leaks all along the front of block, peddal assembly was broken, brakes were ok though.
I don't see how or why anyone would do that conversion. It just seems like if you see it on the internet, it can be done. True it can if you know what your doing.
Title: Re: Mech head on Hydro block??
Post by: theman53 on April 14, 2011, 04:36:00 pm
saurkraut on here put a 1.9 head on a 1.5 block. that is the opposite of what you want. Someone else put a mech head on a hydro block, but I can't remember who it was. It has been done. Search the IDI section and you will find it eventually.
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 15, 2011, 05:14:58 pm
well i foud a head. of all places to find a head, i found one on a farm in pa on an amish farm. it was actually pretty awesome. i have never seen so many diesel parts in my life. they had about 50 heads, and not even lieing more injection pumps than i could imagine. brand new diesel pistons and injectors. lol
Title: Re: Mech head on Hydro block??
Post by: RabbitJockey on April 15, 2011, 06:30:51 pm
the amish are interesting people, they are not as different as you may think.  honestly less computer and tv and more living life, i think they have their priorities strate
Title: Re: Mech head on Hydro block??
Post by: theman53 on April 15, 2011, 07:55:05 pm
x2
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 16, 2011, 06:18:13 pm
i think you hit the nail on the head. less technology and more living life. i think thats what is wrong with todays society. and we wonder what is wrong with todays government lol
Title: Re: Mech head on Hydro block??
Post by: RabbitJockey on April 17, 2011, 05:58:28 am
todays society, everyone wants everything handed to them, they don't want to work for anything, and at their jobs could care less about quality and craftsmanship, its all about putting in the hours.  americans worked hard to get where we are, but now its like everyone thinks its our divine right to have what we have.
Title: Re: Mech head on Hydro block??
Post by: Kantdrivefast on April 17, 2011, 10:41:05 pm
but i guess is what im wondering, is has anyone done this and successfully made it work?

dont know of anyone doing this, but i dont see why it couldnt be accomplished?

Did it, plugged the coolant passage in the head above the drain hole. Drove it for 11000 trouble free kms then parked it.

Its not that big of a deal.
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 18, 2011, 06:12:11 am
but i guess is what im wondering, is has anyone done this and successfully made it work?

dont know of anyone doing this, but i dont see why it couldnt be accomplished?

Did it, plugged the coolant passage in the head above the drain hole. Drove it for 11000 trouble free kms then parked it.

Its not that big of a deal.

thanks. i guess i was just worried about cooling issues, since imma be running an hx35 with a big valve head and other goodies
Title: Re: Mech head on Hydro block??
Post by: R.O.R-2.0 on April 18, 2011, 08:50:09 am
a mech head with big valves? why not just opt for the AAZ head? then you dont have to worry about plugging off ports that arent needed. an aaz head would bolt straight on a hydro block..
Title: Re: Mech head on Hydro block??
Post by: UnderPSI on April 18, 2011, 02:55:09 pm
Some people don't have an AAZ head laying around.
Title: Re: Mech head on Hydro block??
Post by: R.O.R-2.0 on April 19, 2011, 10:46:12 am
Some people don't have an AAZ head laying around.

but they have the money to build a big valve head? and obtain a HX35? i dont get it..

if it were me, i would find an AAZ head. i bet you could get one for under 150 bucks straight from canada..

they are far superior to a 1.6 head. its the best head you can get for an idi VW.. in stock form atleast.
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 19, 2011, 08:40:13 pm
well the head work is pretty much free for me because my best friend owes me some favors and happens to build heads for a engine shop. All thatd id have to do is buy the vavles. it was a thought. I want to do the aaz head swap next summer, so the big vavle 1.6 head was ehhh just a thought. but i do have a bunch of mech heads laying around and no Hydro heads. that was the issue lol
Title: Re: Mech head on Hydro block??
Post by: Kantdrivefast on April 19, 2011, 09:12:54 pm
well the head work is pretty much free for me because my best friend owes me some favors and happens to build heads for a engine shop. All thatd id have to do is buy the vavles. it was a thought. I want to do the aaz head swap next summer, so the big vavle 1.6 head was ehhh just a thought. but i do have a bunch of mech heads laying around and no Hydro heads. that was the issue lol

save the hassle and just get a hydro head.

Dime a dozen in the junkyard
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 23, 2011, 07:56:55 am
in maryland they are not a dime a dozen lol or i wouldnt have such a hard time finding one.
Title: Re: Mech head on Hydro block??
Post by: theman53 on April 23, 2011, 08:50:26 am
Contact some people on the for sale section. Not free but I am sure there are people with parts that would come off them cheaper than you would think.
Title: Re: Mech head on Hydro block??
Post by: RabbitJockey on April 23, 2011, 09:20:31 am
hx35... good luck with that, hy35 maybe, hx35 no way
Title: Re: Mech head on Hydro block??
Post by: R.O.R-2.0 on April 23, 2011, 09:23:40 am
hx35... good luck with that, hy35 maybe, hx35 no way

thats kinda what i was thinking.. its gonna spool 100 rpms away from governor cut.. those things are HUGE!
Title: Re: Mech head on Hydro block??
Post by: RabbitJockey on April 23, 2011, 12:27:00 pm
with one of those flappers that blocks off one of the scrolls at low boost he might be able to spool it up at a usable rpm, but i'm thinking it will surge like a mofo
Title: Re: Mech head on Hydro block??
Post by: R.O.R-2.0 on April 23, 2011, 01:05:28 pm
with one of those flappers that blocks off one of the scrolls at low boost he might be able to spool it up at a usable rpm, but i'm thinking it will surge like a mofo

i dont see how one of those flappers can even function properly.. basically, if you have the right manifold for a twin scroll turbo, half of your cylinders will have no flow when that valve is closed..
Title: Re: Mech head on Hydro block??
Post by: RabbitJockey on April 23, 2011, 01:15:23 pm
you only use that valve with a normal exhaust manifold
Title: Re: Mech head on Hydro block??
Post by: bajacalal on April 23, 2011, 05:27:41 pm
save the hassle and just get a hydro head.

Dime a dozen in the junkyard

I need to get up to Canada then because I've never seen one in a junkyard around here and I'm a regular at the local you-pull-it-yourself yard and a big one near L.A. In fact I don't think I've ever seen a VW diesel in there that's newer than like '83.
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 25, 2011, 02:27:21 pm
yea i havent found one either in a junkyard. but its no big deal. as for the HX35, im gonna try some things as in cam, different valves, .20 over pisstons, 12mm head. see what happens. but my best friend is into Truck pulling, and he knows a guy that is developing a quick spool plate. it covers up one port on the turbo, and it is cnc machined and once you get into boost, the other port opens. he has the proto type  made just in the part of testing right now so we are gonna test it on my car. would be the perfect test. but if it never spools i have a k14 ill throw above it.
Title: Re: Mech head on Hydro block??
Post by: RabbitJockey on April 25, 2011, 05:19:31 pm
i'm excited to hear how this works, but i'm thinking if you can spool it then surging could become an issue, although those turbos have built in surge protection which should help
Title: Re: Mech head on Hydro block??
Post by: wakeboard4life07 on April 25, 2011, 07:54:30 pm
it should be interesting. lol the other thing im undecided about is wether i wanna run water meth or nitrous. im feeling nitrous. may i remind you this is NOT a daily driver. Im building this to be a fun aroud town car. I have a shaved bay, and currently doing a wire tuck.