is it possible to build a stroker with the stock size pistons? i wanted to make a 85.5x82 engine so i could keep machine down and the heads cheap... i want alot of low end power for coming off belt way ramps to accelerate, but i dont really care about top end.
if not what combo will put me in the neighborhood of 100-125 hp, without turning high revs, using low compression and using medium level heads and exhaust, its a daily driver.
building a stroker
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James2
- Posts: 3148
- Joined: Fri Mar 16, 2001 12:01 am
building a stroker
It's possible, but the spacer under the cylinder will be huge. The problem is the stock P/C set is not offered for strokers.
So your going to end up with a very wide engine, plus the piston is going to be pulled out the jug at BDC. Also, the counter wieghts are going to hit the skirts.
The biggest I would go is 78mm. You will still need to clearance the case and the pistons.
A cheaper/easier option is to have the case and heads bored for the 94mm pistons. You pay more machine work, but the engine is a lot easier to build, plus the crank is chaeper/
Just my .02 cents
So your going to end up with a very wide engine, plus the piston is going to be pulled out the jug at BDC. Also, the counter wieghts are going to hit the skirts.
The biggest I would go is 78mm. You will still need to clearance the case and the pistons.
A cheaper/easier option is to have the case and heads bored for the 94mm pistons. You pay more machine work, but the engine is a lot easier to build, plus the crank is chaeper/
Just my .02 cents
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Marc
- Moderator
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- Joined: Thu May 23, 2002 12:01 am
building a stroker
There's nothing wrong with your idea, in fact it's best for a heavy car, but like the man said it'd be `way wide - pushrods and sheetmetal wouldn't reach and it'd shoehorn into the engine compartment.
88mm bore pistons are available with the correct compression height for a stroker - the best ones come from Gene Berg - and will give much longer service than 94s.
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"For every complex problem, there is a solution that is simple, neat, and wrong." --H.L. Mencken
`67, 69, `77 Beetles, `73 II (Type I engine), `86 Audi 5000s, etc. etc.
Independent VW specialist shop manager/unit repairman 1978-1991
Lots of good links in my Yahoo! Briefcase
http://briefcase.yahoo.com/marcvellat
88mm bore pistons are available with the correct compression height for a stroker - the best ones come from Gene Berg - and will give much longer service than 94s.
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"For every complex problem, there is a solution that is simple, neat, and wrong." --H.L. Mencken
`67, 69, `77 Beetles, `73 II (Type I engine), `86 Audi 5000s, etc. etc.
Independent VW specialist shop manager/unit repairman 1978-1991
Lots of good links in my Yahoo! Briefcase
http://briefcase.yahoo.com/marcvellat
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Searoy
- Posts: 2869
- Joined: Thu Aug 23, 2001 12:01 am
building a stroker
For ease of building I would go with the 1914 (94 bore, stock stroke). Machining is fine. The cost of increased bore is less than the cost of a stroker crank and the clearancing required to run it. Plus, with stock pistons you would need such thick spacers that your engine would be too wide for the cooling tin to fit anymore, might not even fit in the bay.
A 1914 single port with dual ICTs or Dual Kads would be way cool, lots of low end with the single ports. Use a Stock VW doghouse shroud and make sure all the tin is in good shape and fit correctly.
For extra oomph run 7.5:1 compression and a Webcam 111. It's a torque monster. I only recommend such low compression due to the grind of the cam...keeps dynamic compression really high.
Even a mild porting job and stock exhaust will make this more engine than you ever thought possible, for next to nothing over the cost of a stock engine.
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*** Teach a Man to Fish ***
Darth Searoy
"I tend to lean toward a tighter gap and a
looser skirt....a little slap never hurt." -- Joe of the West
A 1914 single port with dual ICTs or Dual Kads would be way cool, lots of low end with the single ports. Use a Stock VW doghouse shroud and make sure all the tin is in good shape and fit correctly.
For extra oomph run 7.5:1 compression and a Webcam 111. It's a torque monster. I only recommend such low compression due to the grind of the cam...keeps dynamic compression really high.
Even a mild porting job and stock exhaust will make this more engine than you ever thought possible, for next to nothing over the cost of a stock engine.
------------------
*** Teach a Man to Fish ***
Darth Searoy
"I tend to lean toward a tighter gap and a
looser skirt....a little slap never hurt." -- Joe of the West