Honda H22 Rods and Pistons

[Lextreme II]

I have some pictures and measurements for the Honda H22 rod. The crank side is about .145" smaller then the 1uzfe. The 1UZ diameter for the crank side is 2.145" and the Honda H22 is 2.000" Basically u can kiss it good bye..... I dont think anyone would grind the 1UZ crank smaller to fit the Honda Rod. Or we can bore out the diameter of the H22 to make it work on our 1uz. Here are some aftermarket heavy duty rods from Eagle: Its rated at 625 hp

Here are some specs on Eagle H22 Rods:
H-Beam Rod Specs
5.630 Rod Length Apprx. Gram Weight 510
1.890" Crank Pin .866" Piston pin
B.E Width .935" Bushed Fit Pins - Full Floating
USA Certified 4340 forged steel
2-Piece Forging for increased strength
Multi-stage heat treated
All surfaces are 100% machined
Shot peened to stress relieve the metal
Each forging is x-rayed, sonic tested, and magnafluxed to insure quality
ARP 2000 Capscrew bolts
Stroker Design for up to 3.800 stroke crankshafts
Brand new rods race ready
Rated to 650 HP

1UZFE Rod Specs:
CONNECTING RODS TABLE
------------------------------------------------------------
Application In. (mm)
Bore Diameter
Piston Pin Bushing ......... .8663-.8668 (22.005-22.017)
Big End (Crankpin)
Reference Mark "1" ...... 2.1654-2.1656 (55.000-55.006)
Reference Mark "2" ...... 2.1656-2.1658 (55.006-55.012)
Reference Mark "3" ...... 2.1658-2.1661 (55.012-55.018)
Reference Mark "4" ...... 2.1661-2.1663 (55.018-55.024)
Maximum Bend (1) ............................ .0020 (.050)
Maximum Twist (1) ........................... .0059 (.150)
Side Play
New or Rebuilt ............. (2) .0059-.0130 (.150-.330)
New or Rebuilt ............. (3) .0063-.0130 (.150-.330)
Service Limit ......................... (2) .0150 (.
Rod Bolt Shank Diameter
New or Rebuilt ............... .2835-.2874 (7.200-7.300)
Service Limit ............................ .2756 (7.000)
(1) - Per 3.94" (100 mm) of connecting rod center-to-center
length.
(2) - 1990 Model.

 

[urtwhistle]

hmm i was thinking along the same lines the other day. if they can hold down a 9k rpm 2.2l stock they would be awsome to see in a v8 combo. how bout rods for the k20a's that are in the teggys they might have a closer stroke or even the old b20's that came in the preludes. honda engines generaly have a preety shore stroke so soming maybe possible

 

[turboteener]

I would turn the crank down if it could get me the use of the Intergra Type R rod bearing, but that is a 1.800 diameter bearing so I don't see that happening. Maybe a custom 180 crank with that rod bearing.

 

[SCV8]

If you offset ground the crank, you'd gain some stroke while you made the rods fit.
What about smallblock chev parts?
No wonder the hondas rev so nicely, there isn't much to that rod.

 

[sbcelicagt]

Interesting findings. What is considered the limit of the stock rods? I know that in the case of the 22-RE the SBC guys used those rods as they are close to fitting. I also know that the 1MZ-FE uses a connecting rod that is extremely close in design to the 22-RE.

 

[Jeff Taylor]

22R connecting rods look like one possibility...

Lately I have been researching different connecting rod types and have found pre-1968 Chevy 283ci & 327ci rods to come close to the specs the 1uz needs. I have also been considering the use of aftermarket 87.5mm bore 300zx pistons.

Pre-1968 Chevy rods have a 0.927" small end, which could be bored to 0.970" or so and have a 22mm wrist-pin bushing pressed into it...such as the nissan sr20's. The small end, however, may have to be thinned 0.200" to equal the width of the 300zx connecting rod's small end.

The big end of the Chevy rods would be bored from 2.1250" to 2.1666" and notched to accept 1uzfe rod bearings. The big end would also have to be thinned 0.040", which isn't much.

Using a set of wiseco forged 300zx 87.5mm bore pistons with a compression height of 1.260" and the Chevy rod length (C to C) of 5.700", 0.120" (3.048mm) would have to be shaved off the block's deck to have stock quench. However, for 8.5:1 compression, 0.048" quench should be left, therefore only 0.072" should be shaved off the deck.

The 300zx forged wiseco pistons would be about $900 for a set of 8. The pre-1968 Chevy rods would be about $500 for a set of 8.

Thinning the small end 0.200" seems to be the largest dimension change for this setup.

How does that recipe sound?

Jeff

 

[Jeff Taylor]

Wiseco part number: K549M875
Eagle H-beam part number: ESP-5700S3D