155mm stroker rods anyone???

[aronmatic2]

I am planing to order some 155mm h rods.
The manufacture make me, if i order atleast 10 sets.
i can sell them for 400euro+shipping

we can use this rods with stock pistons, diesel crank and block.
its can be really cheap.

anyone intrested?

[Jamo]

Stock pistons? are you sure because that would send the compression ratio high

[aronmatic2]

Stock pistons? are you sure because that would send the compression ratio high

i dont think so. lets count.
i can order, whatever we need.

[Jamo]

Stock pistons compression height is 32.8 to run 155mm rods with 95.5 crank you need pistons with a compression height of 21.8mm

[aronmatic2]

this is what i think:

236mm(block)-32,8mm(comph)=203,2mm
95,5mm(stroke)/2=47,75mm
203,2mm-47,75mm=155,45mm

if we order 155mm, we reduce the original compression ratio.

[Billman]

i think aron is right!
I have got a nice Excel from justin (hope it works correct)

here you go:

[Jamo]

i think aron is right!
I have got a nice Excel from justin (hope it works correct)

here you go:

Really then explain why the sheet shows a 17.25 compression height with the stock block and a compression ratio of 9.8 with stock block height of 220mm and stock piston specs please Billman

Specs: Stock 3b
Bore (mm) 81
Stroke (mm) 95.5
Number of Cylinders 5
Block deck height (mm) 220
Rod Length (mm) 155
Wrist Pin Diameter (mm) 20
Redline (rpm) 7100
Max Piston Speed (m/s) 22.60166667
Rod/Stroke Ratio 1.623036649
Compression Height 17.25
Ring Package (mm) 7.25
Displacement (cc) 2460.555723
Compressed HG (mm) 1.875
Head Gasket Bore(mm) 82.5
Bore Area (cm^2) 51.52996278
Cylinder head cc's 44
Head gasket cc's 9.661868021
Piston Dish cc's 2
Cylinder BDC cc's 492.1111445
Total Volume BDC 547.7730126
Total Volume TDC 55.66186802
Compression Ratio 9.841082092

[Billman]

Really then explain why the sheet shows a 17.25 compression height with the stock block and a compression ratio of 9.8 with stock block height of 220mm and stock piston specs please Billman

Specs: Stock 3b
Bore (mm) 81
Stroke (mm) 95.5
Number of Cylinders 5
Block deck height (mm) 220
Rod Length (mm) 155
Wrist Pin Diameter (mm) 20
Redline (rpm) 7100
Max Piston Speed (m/s) 22.60166667
Rod/Stroke Ratio 1.623036649
Compression Height 17.25
Ring Package (mm) 7.25
Displacement (cc) 2460.555723
Compressed HG (mm) 1.875
Head Gasket Bore(mm) 82.5
Bore Area (cm^2) 51.52996278
Cylinder head cc's 44
Head gasket cc's 9.661868021
Piston Dish cc's 2
Cylinder BDC cc's 492.1111445
Total Volume BDC 547.7730126
Total Volume TDC 55.66186802
Compression Ratio 9.841082092

It is very simple! This part of the sheet you are looking at shows 95.5 crank with 3B Block and 155mm rods!

Aron spoke about 95.5 crank with diesel block and 155mm rods!

[Jamo]

My bad, if it's diesel block then the size is 155mm but the compression ratio is still too high to use stock pistons.

I have Pisobikers calculations on the subject from when I bought his setup as he used 155.xx rods can't remember exactly at the moment.

[Wolfgang]

hi,

ask Peter kowatsch. He always takes 154 or 155mm rods when he builts a 2.5ltr engine.

Wolfgang

[raymor]

I'm interested if we can get a definitive answer...

[javispa]

Might be interested... A stroker was not on my immediate plans, but could be a nice option considering I plan changing my engine's rods... then why don't do it on another engine and keep mine as stock?
Keep us updated Aron and thanks very much!!

[javispa]

Any more news about this Aron?
Cheers.

[aronmatic2]

there is not a lot of intrest. i canceled my order. maybe later.

[javispa]

Thanks for your answer. I have making some numbers and, if I am right, with stock pistons the compression ratio would be 8,71:1.
The problem is if you upgrade the bore...
If JE pistons like these are used (this would be my idea) I think the compression ratio would drop to 7,94:1. I think it would be a little bit too low.

http://cgi.ebay.com/ebaymotors/JE-PI...0646QQtcZphoto

I still think these rods are a very good option.
Cheers!