I'm going to be building my 4G63 block here shortly using the stock crankshaft.

I've opted to go with a 156mm Steel rod coupled with the Wiseco 1400HD 2.3L Stroker piston in 85.5mm bore (.020" over)

I'm having a hard time deciding between con rods and I figured you guys might have some weights on the 156mm rod options. The three connecting rods that I'm looking at are...

Magnus (R&R)
Crower
Oliver

They're all very similarly priced (650-830) and will take what I plan to put at it (PT-6262) Thanks in advance!

-Eric

 

Went with the same pistons but in stock bore.

I got carrillo rods with carr bolts. Full acl bearings, arp main studs, arp L19 studs, Buschur balance shaft delete and fluidampr damper...

The car revs like a motorcycle on a br fs635, similar I guess to the 6262....

 

Do you have a weight on the Carillo's?

 

574 grams with the bolts if I remember correctly.

If you search my profile and threads you will find a thread with photos of the rods and pistons on a scale...

 

Searched, Found, and confirmed. 574 grams.

Was that the 156mm Rod?

 

It's the stock size rods so I am not sure... Lol

what I remember however is that the carrillos are 100+ grams lighter than e.g. The Manley turbo tuffs, which are excellent rods but a tad heavy...

Carrillos I guess because of their design are light but without cutting back in terms of strength and durability.

 

stock size is 150mm.

Did you run a std Evo piston w/85mm bore and not the 2.3L stroker piston?

 

Its the 2.3L stroker piston, but dont forget that when you go down in stroke you go down in compression. So if the piston is 9:1 for the stroker its only going to be 8:1 for the long rod 2.0. You need to do custom pistons.

 

Ok I did some searching

Manley Turbo Tuff Rod - 680
MAP Connecting Rod - 652
Crower - 607
Carillo - 574 (150mm rod)
Olivers - 585

So I guess that Puts Carillo #1 and Oliver #2 for weights.

Edited for correctness. Thank you 94awdcoupe

 

Compression Height for STD Evo piston is 35mm
Compression Height for 2.3L Stroker Evo piston is 28.7mm

35-28.7= 6.3mm

Connecting rod c-c for STD Evo is 150mm
Connecting rod c-c for 2.0L L/R Evo is 156mm

150-156 = -6

6.3 - 6.0 = 0.3mm lower in the cylinder.
0.3mm*(3.14159*42.5^2) = -1.7cc

9:1 CR STD piston = -14cc dish
"9:1" CR 2.3L stroker piston = -21cc dish

Difference is -7cc more dish. + -1.7cc = - 8.7cc less than STD Evo with 88mm stroke

For a 88mm stroke changing the dish by 9cc results in almost a full point of Rc... So by running the combination I was talking about (156mm rod w/2.3L piston) will give me an Rc of approximately 8:1

 

Carillo 150mm Evo Rod Specs:
- Bolt Size: 3/8"
- Length: 5.906" (150mm)
- Big End Bore: 1.890" (47.998mm)
- Pin Diameter: .866" (22mm)
- Total Weight (in grams): WMC Bolt = 566, CARR Bolt = 567
- Rotating Weight (in grams): WMC Bolt = 393, CARR Bolt = 396
- Reciprocating Weight (in grams): WMC Bolt = 173, CARR Bolt = 171

Impressive. However... If I could get a 156mm Carillo Rod and put a sub 300 gram piston on the end of it... i think I'd have a helluva combination. Who makes a piston for a 156mm rod, 88mm stroke, 4g63 engine?

 

Um, use a 10:1 JE 2.3 piston or a Mahle 9.5:1? A compression change with an otherwise standard piston is only 44 mor dollars through JE and I'd assume (dont remember and cant call right now) that the others are close in price.

 

I have the Manley 156mm I beams(14421R6-4) and the Manley .020 over stroker piston(608005-4) in my long rod set up.

 

Manley is 680 gram
Oliver is 585 with bolts

 

Eric, not sure what gasket you used but using a 1.0mm/.040 I came up with 7.96:1 with an off the shelf piston (listed as the 8.5)

Where rod length is 156mm, stroke is 88mm, pin height is 1.13, head volume is 43cc, and dish is -22cc.

I found this from Wiseco-

K596M855 85.50 / 3.366 .020 100 150 28.7 47 -21 1.13 0.3 229 22mm

It came up with 8.04:1 (using Eagle Rods calc btw)

Mahle- EVO130366I23 says it is a 9.5:1 with a -23cc dish? I ran that one through the calculator and as a 2.3 it ends up at 8.8. I find it pretty hard to believe that Mahle made a mistake on their math (they do make all BMW pistons amongst others) and that the calculator failed. I cant find any other specs on them from Mahle though to confirm there werent other mistakes made somewhere down the line.

By the by, it was 7.85 as a 2.0 LR. I think I'd pay the money and just have Wiseco or JE engineer the higher compression real quick and grab that.