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Author Topic: 1.7 KY with turbo  (Read 3888 times)

September 26, 2018, 05:22:02 pm

Mk1Diesel

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1.7 KY with turbo
« on: September 26, 2018, 05:22:02 pm »
Hi,

I have an golf MK1 with a 1.6D (CR) engine and I would like some more power.
I could place a 1.6TD (CY or JR) and boost it up a little. Around 80/90 hp would be enough for me.
But, I am strongly thinking about a 1.7 KY engine and put a turbo on that one.
The 1.7 KY does have oil squirters and is less hot engine then the 1.6TD.

A friend of mine bought a VW T3 with an 1.7 turbo as it is and that drives really good, enough power. I also have a T3 1.6TD so I could always use the engine in my T3 if I want to later on.

But, the idea is to put an KY 1.7TD in my Golf MK1.
I dont have an KY engine so I need to buy one. I found the option to buy a revised KY engine on ebay.
Its an Engine block mounted with oil pump, oil sump, crankshaft, bearings, connecting rods, pistons and cylinder head.
But before I do I would like to so some  homework first of what problems I may face.
So I hope someone has some experience with building a KY 1.7 with turbo.

First Questions that I have upfront:
-The KY has never been deliverd in the golf so will it fit? I quess so because 1.6 and 1.7 also fit in a T3.
-What parts from what engine do I need to make it an 1.7 turbo? I assume I can use a lot from a 1.6TD. (but I dont have one)
-What turbo should I use best knowing that a little boost up would be nice.
-Any tips and tricks are welcome.
 :)

Thanks in advance!
« Last Edit: September 27, 2018, 01:31:24 am by Mk1Diesel »



Reply #1September 26, 2018, 06:47:12 pm

ORCoaster

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Re: 1.7 KY with turbo
« Reply #1 on: September 26, 2018, 06:47:12 pm »
Read the two following links, since you are looking for tips and tricks.

http://karmakanix.com/knowledgebase/engines/diesel-engines-tdi-specialists/diesel-engine-history-vw-audi-usa-models/   
http://forums.tdiclub.com/showthread.php?t=15147

My suggestion is to go with a 1.9L replacement and abandon that 1.7 idea altogether.  If you can't source a 1.9 go down to a 1.6 TD as those parts will be available, people understand their troubles and you won't be dealing with some off connected brewed up engine.  Those do exist and some even work well, for awhile, then they blow up.  Operator error for the most part. 

Why make it so hard for the extra 100 ml of compression space?

MY two pennies worth. 

Reply #2September 27, 2018, 01:30:21 am

Mk1Diesel

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Re: 1.7 KY with turbo
« Reply #2 on: September 27, 2018, 01:30:21 am »
Tnx for you reply!

The reason why I would like to go for the KY are the following:
-This engine has the same stroke, so I can keep my transmission the same.
-The 1.7 is the cooler and stronger engine compared to the 1.6.
-You can generate a little more power from the 1.7 then the 1.6.
-I can swop the KY also in my T3 later on if my JX may break down
-I stay most close to the original engine

Reply #3September 27, 2018, 11:24:56 am

libbydiesel

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Re: 1.7 KY with turbo
« Reply #3 on: September 27, 2018, 11:24:56 am »
-This engine has the same stroke, so I can keep my transmission the same.


I don't understand your comment about the transmission.  There is no need or benefit to matching the stroke of the engine to the transmission. 

 

Reply #4September 27, 2018, 12:48:09 pm

Mk1Diesel

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Re: 1.7 KY with turbo
« Reply #4 on: September 27, 2018, 12:48:09 pm »
-This engine has the same stroke, so I can keep my transmission the same.


I don't understand your comment about the transmission.  There is no need or benefit to matching the stroke of the engine to the transmission.

1.9 (AAZ) has longer stroke and therefor makes less RPM's at max. Therefor topspeed is lower. To compensate this you need a different gearbox.

Reply #5September 27, 2018, 01:04:25 pm

libbydiesel

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Re: 1.7 KY with turbo
« Reply #5 on: September 27, 2018, 01:04:25 pm »
I kinda sorta see what you're trying to say.  Yes the stroke is longer which results in a max power at a lower rpm (4,200 vs. 4,500).  I would bet a big pile of cash that the power of an AAZ at 4,500 is still higher than the max power of a KY.  The most important factor for you is top speed?  You think that COD and rolling resistance will magically match the engine output at the max power rpm resulting in top speed always occurring at max power?  There are much more important factors to consider when choosing gearing than the stroke of the engine, which IMO is irrelevant. 

Reply #6September 27, 2018, 10:45:30 pm

fatmobile

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Re: 1.7 KY with turbo
« Reply #6 on: September 27, 2018, 10:45:30 pm »
 Ya know,.. you can put 1.7 pistons in a 1.6 hydro block right?
 I have 1st oversize in one of mine.
 80mm bore. They touched the oil squirters a little.
 I think I would try to find standard 1.7 pistons next time. Probably 79.5mm
 Hydro block because you will need the bigger 1.9 head gasket for the pistons to protrude through.

 I can feel the extra power.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #7September 28, 2018, 01:38:36 pm

Mk1Diesel

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Re: 1.7 KY with turbo
« Reply #7 on: September 28, 2018, 01:38:36 pm »
I kinda sorta see what you're trying to say.  Yes the stroke is longer which results in a max power at a lower rpm (4,200 vs. 4,500).  I would bet a big pile of cash that the power of an AAZ at 4,500 is still higher than the max power of a KY.  The most important factor for you is top speed?  You think that COD and rolling resistance will magically match the engine output at the max power rpm resulting in top speed always occurring at max power?  There are much more important factors to consider when choosing gearing than the stroke of the engine, which IMO is irrelevant.

It is not really about the power or the top speed but more staying close to the standard parts.

Reply #8October 11, 2018, 10:47:09 pm

RabbitJockey

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Re: 1.7 KY with turbo
« Reply #8 on: October 11, 2018, 10:47:09 pm »
most parts are compatible from 1.6 to 1.7 to 1.9 to 1.9tdi. which is why id just go with a tdi from the start unless if you just want to have a unique engine, then by all means use a 1.7. a tdi will fit in to a t3 nearly as easily as a 1.7.It will be much easier to source parts for a tdi, and more reliable in the long run
01 Jetta TDI 100% stock daily
81 Rabbit:TDI-M ported head, Frank06 cam, PD intake, hybrid T3 turbo, Renault intercooler, Syl20 11mm pump, light weight fw, and yellow California Clutch clutch kit

 

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