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AFH engine and transmission


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Hello. I currently have an AFH engine laying around. I want to know if the head is compatible with the AGG engine block.

Plus I wish to know if the AGG block can be hooked up onto a longitudinal trans from an audi a4 (without any conversion plate).

PS: Planning to put one ebay gt45 onto this beauty (Can it take 2bar with stock internals?).

 

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Yes toluene eats rubber, (it wasn't a problem for I ran the engine just a few times, but you would need inox fuel lines for the long run) i made, a very long time ago cork gaskets for a ford fiesta ca

dvderlm

AGG is a two liter Golf GTI.

http://vag-codes.info/files/engines/vw-engines.pdf

AFH is 1.4 which is 77mm bore from memory.

 

I very much doubt the pistons are same bore or spacing.

 

No, sorry.

Vw golf  mark iv 2.0 Cylinder bore 83mm

https://www.autodoc.co.uk/car-parts/piston-10629/vw/golf/golf-iv-1j1/11779-2-0

 

 

 

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1 hour ago, dvderlm said:

AGG is a two liter Golf GTI.

http://vag-codes.info/files/engines/vw-engines.pdf

AFH is 1.4 which is 77mm bore from memory.

 

I very much doubt the pistons are same bore or spacing.

 

No, sorry.

Vw golf  mark iv 2.0 Cylinder bore 83mm

https://www.autodoc.co.uk/car-parts/piston-10629/vw/golf/golf-iv-1j1/11779-2-0

 

 

 

Thank you for the answer, so I should get either the ABF or KR head if I want 16v? 

I like high rpm engines, 8v is not for me... From what I can tell the 1.8t 20v head should be compatible since its also 83mm bore (from what I can tell).

PS: About putting 2 bar boost? Should the stock internals take it (excluding the pistons which must be compatible with the head?)

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dvderlm

20valve. Is 5 cylinders, no?

 

Is the bolt pattern and coolant/oil channels layout the same for AGG and KR?

Try to find head gaskets for both and compare.

 

If you want high rpm why not fit a big camshaft to an AGG 8v head

http://www.catcams.com/products/camshafts/datasheet.aspx?ENGINE_id=272&CAMSETUP_id=1366&Language=english

converted to mechanical lifters?

 

As for boost on stock internals. Polo G40 1.3 will take about 1.4bar of boost with just sodium filled exhaust valves.

Only one way to find out.

If changing pistons, forged pistons and conrods and balanced crank if you have the money.

 

Have you worked out compression ratio? 8:1 to 9.5:1 for boosted usually.

A big cam for high revs might have too much overlap for good boost behaviour.

 

ABA head will fit on AGG block.

It says here

https://vwclub.co.za/forum/viewtopic.php?t=163583

And places exhaust and turbo away from inlet  side.

 

 

Edited by dvderlm
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steveo3002

none of those engines are crazy money....buy the complete engine and save on hassle and incompatible bits n bobs , none of the 16v heads will be a straight swap without mods 

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On 29/10/2020 at 22:31, dvderlm said:

20valve. Is 5 cylinders, no?

 

Is the bolt pattern and coolant/oil channels layout the same for AGG and KR?

Try to find head gaskets for both and compare.

 

If you want high rpm why not fit a big camshaft to an AGG 8v head

http://www.catcams.com/products/camshafts/datasheet.aspx?ENGINE_id=272&CAMSETUP_id=1366&Language=english

converted to mechanical lifters?

 

As for boost on stock internals. Polo G40 1.3 will take about 1.4bar of boost with just sodium filled exhaust valves.

Only one way to find out.

If changing pistons, forged pistons and conrods and balanced crank if you have the money.

 

Have you worked out compression ratio? 8:1 to 9.5:1 for boosted usually.

A big cam for high revs might have too much overlap for good boost behaviour.

 

ABA head will fit on AGG block.

It says here

https://vwclub.co.za/forum/viewtopic.php?t=163583

And places exhaust and turbo away from inlet  side.

 

 

20 valves is 4 cylinder (the 1.8 at least is).

The 1.4 bar boost on the G40 is a good info to know.

About compression ratio I plan to use whatever the engine has, knock isn´t a problem just add a little toluene and listen to the engine, if it still knocks at the limit of the injectors, then just make a double injetor fuel rail (I don´t like giant injetors). I did this with an honda clone and it worked wonders... (adding toluene and jetting the carbs that is). 

 

About the fitment I´ll go with what @steveo3002 said, from my experience there´s always some degree of incompatibility between parts, I´ll probably just get the agg and fit it some valves and the cam (when I get the money). I can´t even afford an ABF at this time. What I wanted was to turbo an engine that breathed well, the AGG is not that sort of thing, so I´ll have to be happy with low end power...

 

 

 

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dvderlm

20v

I did not know that.

https://www.ebay.co.uk/itm/vw-audi-seat-1-8-20V-cylinder-head-fully-reconditioned-06a103373as-/383667664908

 

Do you really mean carbs and toluene?

I think it eats rubber gaskets.

 

I'm asking because I have Lotus Turbo carbs and paper gaskets cannot take boost and the accelerator pump diaphragm is rubber.

 

For injection fine, 1980s Honda Formula1 turbo engine used 86% toluene 14% n-heptane fuel mix.

 

Why not methanol/water inlet spray (Devil's Own or AEM) plus ignition retard with knock sensor?

 

Edited by dvderlm
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7 hours ago, dvderlm said:

20v

I did not know that.

https://www.ebay.co.uk/itm/vw-audi-seat-1-8-20V-cylinder-head-fully-reconditioned-06a103373as-/383667664908

 

Do you really mean carbs and toluene?

I think it eats rubber gaskets.

 

I'm asking because I have Lotus Turbo carbs and paper gaskets cannot take boost and the accelerator pump diaphragm is rubber.

 

For injection fine, 1980s Honda Formula1 turbo engine used 86% toluene 14% n-heptane fuel mix.

 

Why not methanol/water inlet spray (Devil's Own or AEM) plus ignition retard with knock sensor?

 

 

Yes toluene eats rubber, (it wasn't a problem for I ran the engine just a few times, but you would need inox fuel lines for the long run) i made, a very long time ago cork gaskets for a ford fiesta carb, made from floor insulation panels (about 2 mm thick,  they work, you just need patience and a scalpel) , but you can also use copper (i made some for the honda clone head by using a jeweler´s saw). If you´re using boost, of course use the copper gaskets... ;)

 

I don't have any experience on turbochargers, much less on carbed ones... Your description leads to believe is blow through, so I think it only needs to change the carb gaskets to make some boost. Toluene would probably ruin that carb. I generally don't like methanol, it eats aluminum by pitting corrosion (I saw it on my rc airplane´s glow engine...), so if it is blow through I would consider an intercooler and a stiffer spring for the wastegate...

 

In draw through cenarios, I suppose it is much more fun and easy to make boost. However, intercoolers don't work for they condense the air and gas mix, and go boom.

PS: The more toluene you add the harder it is to vaporize the gas by the injectors or jets, so adding a diesel fuel heater above 40% is a good idea.

PPS: Toluene seems to be cheap in some places of the globe, In Portugal is average, don't know how it is in England.

Edited by SiSu_PT
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