ok so heres my story im building my head im putting skunk2 stage 2 cams with skunk2 pro series camgears, skunk2 pro series valve springs with buddy club retainers. my mechanic seems to know what hes doing but he told me one thing i need he said i need to put stronger bolts on my rods if im gonna be going stage 2 cams cause of the torque he said that most honda motors tend to mess up cause those end up getting loose cause of the torque from the built head is this true? and is there anything else i will need if im gonna get this done let me know thanks

 

sorry but honda's don't make torque. Nor on just cams will you make enough power to worry. Turbo guys run 300+ hp on stock internals.

 

oh ok its cause im gonna get my head port and polished while i get my head built so more air in there but you think i will need a fuel rail???

 

no, only reason for a new fuel rail is for the return system. Again mostly turbo guys do this. You'll be fine, bigger injectors though

 

stock rail is fine

 

oh ok thanks but can teh stock block handle all the way to 9 safely?

 

It's not due to torque. The torque produced by the engine remains fairly constant throughout its useful rev range; a 2.0L engine is going to produce anywhere from 115 to 155 lb-ft of torque, but realistically nothing more. Cams don't produce more torque, but rather dictate where that torque will be located in the rev range (which determines horsepower).

Rod bolts stretch due to the forces generated by the pistons changing direction at speeds well above what they were intended to. Thus, if you're revving the engine well beyond its original rev range with cams that make power at even higher RPM, a built valvetrain, and more airflow, you risk overstressing the bottom end and stretching the rod bolts. Then you'll spin rod bearings. This is why LS-VTEC engines with stock bottom ends will spin rod bearings after several thousand miles of revving above 8000 RPM if the rod bolts haven't been upgraded.

Now, I don't know the history of K20A2 rod bolts or what sort of RPM they can safely handle; you may or may not need to upgrade them. Just wanted to clear some things up.

Apparently the rods are a weak point of these engines, because I recall a lot of rod failures years ago on the first K-series Honda Challenge cars.

 

oh seriously? dang well i will change the bolts then cause i think 50 dollars or so for those bolts is well worth not messing up the bottom of the engine than paying those thousands to repair or buy a new one

 

ive been reving to 8800 for a couple years now with my cams and hondata without doing anything to the bottom end.......yet (KOW)

 

9200 rpm rev limit, standard bottom end,Buddy club Cams, K-Pro no problems

12 Months still going when we pulled it out

 

the block can handle that no problem.. the rods arent going to agree with 9k all the time tho.. i would use eagle or similar rods and rock it out. or if your cheap and want to take a chance just order up some rod bolts from arp.

 

you can rev up to 8,700 safely.

if you want to build a motor, do the k24 build, they average at 200pounds of torque and is very promising hp numbers. I dont know bout other most rsx owners but im quite satisfied with kpro'd k20a2 with bolt ons.

 

i wasnt.. so i built a monster, blew it up, built another it blew up, now im happy with a stock motor lol

 

i was doing 9grand all summer no problem

 

what type of mods you running?

 

well personaly i was going past 9 grand... and a lot fo the times the rpms would stick there untill traction was achieved...

 

k-pro, injen cai, dcrh, greddy evo-2 catback

 

damn from what i heard is that the stock head can handle more than 83000 rpm but thats the 02-04 i know K-Pro takes it to like 86000 but i have gone to places and they said the stock head can't handle that high or rpm range

 

I had the Z1

 

type r can handle 8600 fine..(stock) ide stay away from the places.