bpaspi

You mean due to the different displacement? You will have much more effect coming from the lower flow for cyl. 4 from the intake manifold.

Stratocaster

These guys will not ship, but hardtopguy does. You can see the list price and the selling price.

http://www.hondaautomotiveparts.com/auto/j...NSMISSION++ASSY.

Siggy

As far as the oil bolts go, ive heard you do not have to replace them unless your are FI'ing or really tracking the car hard...

Stratocaster

But if you have the motor open and are already fixing it. It would be foolish not to change them.

atomic

Inlinepro have a very good offer on at the moment...$565 for a set of CP's
http://www.inlinepro.com/s1/p-47-f-s...all-motor.aspx

As stated you will need to factor in the cost of rebuilding the block but with this offer on it may would out quite cost affective.

As far as oil jet bolts got they where updated from a 2 feed hole design to a 4 hole one, as there were reported issues with oil starvation resulting in damage to the cylinder bores. Have to agree if you have the old bolts installed and the block is getting a rebuild then it would be foolish not to replace them with the updated ones. They cost about $100 for the four but could say you a lot of haste/cost in the future and NO this doesn't just apply to forced induction.

Stratocaster

Thos pistons would require the block to be sleeved. At that point, it would be most costly then a new OEM shortblock.

hippos2k

thanks stratocaster - i have been on this website before for parts, but if we add all the cost for the parts for a total short block, isn't it way more than $2500? i mean i've seen used blocks for around $2000-$3000 but not new ones.

atomic

That depends on how deep the scoring is but even though the F20 has fibre re-enforced cylinders they can be re-bored within a certain amount without sleeving. Due to the Fibre re-enforcing CP are one of only 2/3 pistons that are compatable with the F20C without using ductile iron sleeves.

I can't remember the max re-bore the F20 can take but I have it written down in the workshop somewhere but off the top of my head the absolute max in the region of 3.76mm before you are going to run into issues with the Fibre re-enforcing. I'll look it up and update this thread when I find it but I would like to bet that the range of sizes stocked by inlinepro would cover the required rebore of this block..but of course without seeing it you can never be 100%.

Stratocaster

To install an OEM short block, you need a headgasket set and head bolts. You will need them regaurdless of what you do. So they are a wash for cost.

Now you can find a used motor or a full swap from 1200 - 3800. Depending on what you get will impact the cost of the additional parts. the problem with a used motor is that you don't know what is wrong with it, or will go wrong with it. Where a new shortblock will be just like a new car, new break in, ect..

i have rebuilt a motor in a car (paid to have it done) and it failed. I should have gone with the new OEM block in that case. So when the motor failed in my S2000, I bought a new OEM short block. I have been very happy.

Now I have built a car from the ground up. I bought a few swap, cheap and they all needed to be rebuilt. So in the end, I opt'ed from a new OEM short block. This car runs great. If and when I do rebuild the blocks I have, I will sleeve them.

SpitfireS

bpaspi Posted on Dec 3 2009, 08:02 PM
Yes.
Lets exaggerate it: #1-2 and 3 displace 500cc and the #4 displaceses 501cc.
501 cc delivers more power?
Allthough the ECU will not know the difference and will inject the same amount of fuel?
Or is the O2 sensor so efficient (high resolution) it can detect the difference between cylinders and tell the ECU?
Just wondering

Siggy Posted on Dec 3 2009, 08:31 PM
In Europe all S2k's were recalled to have the oil jet bolt upgrade.
Even the ones driven by granny's.
Better safe than sorry I guess.