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914World.com _ 914World Garage _ 1800 stroker

Posted by: bd1308 Mar 14 2006, 08:27 PM

is this possible? I mean I would think it wouldnt be IMPOSSIBLE, but i was just looking for a summer project....

Just thinking out loud, dont bash me for not thinking or researching anything. Just extending the britt feelers out there to see who knows what about stroker engines....

Assume this will be ran with aftermarket EFI (megasquirt).

b

edit: actually, assume this will be run with my weber DGEV carb

(someone get Joe Richard over here, he'll die)

Posted by: Mueller Mar 14 2006, 08:34 PM

sure, install a 2.0 crank/rods/pistons and you have a "stroker" engine

"most" people increase the bore at the same time...the motor I was building and sold to Mark Henry was a stock bore with a 78mm stroke

Posted by: bd1308 Mar 14 2006, 08:38 PM

but the 2.0 cylinders wont fit into the 1.8 heads....

I have a set of 2.0 bus heads, but i'm losing that battle....they are a "just in case" item....

i also have 1.7 heads (extra set)...

and if i grab this 1.8 engine i'll have 3/4ths of a 1.8 engine...

i'd liek to be able to use either the 1.7 or the 1.8 heads and then just add some (relative term--I think my 1.7 is fast) power in there until i can get $$ for a raby 4

b

Posted by: bd1308 Mar 14 2006, 08:43 PM

QUOTE (Mueller @ Mar 14 2006, 08:34 PM)
sure, install a 2.0 crank/rods/pistons and you have a "stroker" engine

"most" people increase the bore at the same time...the motor I was building and sold to Mark Henry was a stock bore with a 78mm stroke

wow! thats quite a bit more than a stock stroke if I looked correctly.

everything else was stock? Wouldn't there be problems with the valvetrain colliding with the piston somewhere in its travel?

where'd you get the rods to make that 78mm stroke?

b

Posted by: Dave Bell Mar 14 2006, 08:50 PM

Stock 1.8L, 93mm pistons and 2.0 cylinders, 94mm, will fit the 1.8 heads. In fact 96mm cylinders will fit in the 1.8 head... cylinder walls are just thinner.

Posted by: Mueller Mar 14 2006, 08:50 PM

think about it:

if you increase your crank stroke, what does it affect?

with the stock rod and piston it would cause the piston to slam into the head, so, you can use a shorter rod or use a piston with a pin height closer to the top of the piston....

2.0 cylinders will fit right into the 1.8 heads and for the 1.7 heads, you just open them up...the cost should be about $50 or so to mill 'em out.....

the cheapest method to build a stroker out of your 1.7/1.8 would to convert it to a 2.0......

maybe I'm wrong, but if it was that easy, we'd see more people doing it....you should contact 914V6 or is that V6914?? he is into building odd ball combo's on the cheap....

Posted by: bd1308 Mar 14 2006, 08:55 PM

SWEET! so just forget the stroker idea altogether??

in my head, some things appear easier than they really are...must be the KY air

anyway, 96mm pistons seem like a GrEaT idea and then use 1.8 heads....

wonder who to ask to see if they have 1.8L heads lying around. I could also get teh 1.7s opened up too....options options.

b

Posted by: Jake Raby Mar 14 2006, 09:16 PM

Just how does one create an "1800 Stroker"??

Posted by: Mueller Mar 14 2006, 09:23 PM

QUOTE (Jake Raby @ Mar 14 2006, 08:16 PM)
Just how does one create an "1800 Stroker"??

the correct answer would be:

you'd have to start with something "smaller" than 1800cc's

Posted by: Dave Bell Mar 14 2006, 09:28 PM

Muller beat me...

I guess 71 x 90 is a stroker if you are starting with 66 x 90

Posted by: Jake Raby Mar 14 2006, 09:30 PM

OR stroke an 1800 case to another displacement...

Posted by: bd1308 Mar 15 2006, 07:17 AM

yyyyeah...

I was thinking aloud.

I was going to take a 1800 Case, and make a bigger engine, IE a stroker. But since 96mm pistons fit into 1.8 heads....

b

Posted by: Jake Raby Mar 15 2006, 08:07 AM

QUOTE (bd1308 @ Mar 15 2006, 05:17 AM)
yyyyeah...

I was thinking aloud.

I was going to take a 1800 Case, and make a bigger engine, IE a stroker. But since 96mm pistons fit into 1.8 heads....

b

Remember:
It doesn't matter what the engine WAS!

My 3 Liter is built on the earliest 1.7 liter case I could find that wasn't magnesium!

Also remember that displacement offers no benefits without proper head work, so you could build a 2500 with stock heads and more than likely make LESS usable power than a stock 1800!

It's all in the combo.