MMCB

Hi I've got a MY02 and I'm thinking if rebuilding the engine with the 2.2 spoon Stroker kit. I will have this professionally installed by a well know Honda tuner in the UK.

My question is are they reliable? Would it be as good as a new engine and hope to see another 100k?

Thanks

JDMpearlwhyteZ

It would probably cheaper to just drop in a used f22 mate.

Are you planning to rev it to 9k? That would be the only thing I could see making it less reliable. I don't think spoon revved their stroked car to 9.

MMCB

You cannot get the 2.2 in the UK

Also on spoons website it says the Stroker 2.2 makes 275 ish bhp

Was planning to rev to 8600

MB

Without cams and head work I can't see it making any more power than a standard AP2 at 8600.

Doesn't the block need sleeving for the Spoon kit?

JDMpearlwhyteZ

From what I read it's a 11.8:1 compression vs stock 11.0:1, so i honestly can't see it making 35 more crank hp. Maybe with a tune and ems that you'll likely need for it to run properly.

From Spoon
The Spoon F20C Stroker has been designed to allow the standard Honda F20C be over stroked to the 2.2L capacity. Unleashing torque that some have complained the S2000 was missing in the past and increasing power.

The kit comprises of: Head gasket, crankshaft, connecting rods, forged pistons, rings, pins, oil jet. All parts are selected and balanced within .2g with a total rotational tolerance of less than 1g

Kit supplied with 0.25mm over bore pistons and rings

Higher compression will be achieved 11.8:1 (STD 11.7:1) Inner diameter × stroke (mm): 87.25 × 90.7

s2000Junky

Yeah tough call. With the slight bump in compression I don't see that netting more then 5-8hp/trq and 0.25 overbore/pistons maybe 2-5hp. If the rods are significantly lighter that would free up a few more hp, but I don't know what they are using in the kit. If the crank is shaved down weighing less then stock then there is some more power to be freed up there. Kit come with a light flywheel? Is their head stock, or? 35hp has to come from somewhere if thats an honest claim. Tuning isn't going to net much at peak with stock cams, only if you run race fuel or E85 so you can get some more timing advancement. With higher compression you may have to actually retard timing depending on the pump fuel you have available to run, as to keep it from detonating, so at worse case it may be a pointless wash.

Keep in mind too, that forged pistons expand a lot more then the pistons that come stock in our motor, so the piston to cylinder wall clearance has to be increased for looser tolerances, which means overall more oil usage, longer warm up times when cold due to piston slap and overall shorter piston longevity then with a more precises tighter tolerance OEM spec engine. For guys that run FI with a lot of boost/power, its a trade off worth considering since other factors are more the weak link at that point, but on an NA low power engine it doesn't make a lot of sense making the sacrifice in overall longevity, especially when there is an OEM engine with the same stroke/spec that came in the car regardless if you can acquire one or not. I would really look into that though, make sure you cant import one, either a used long block or a new bottom end from Honda.

wholeo

Not sure if this help but, here is an old video of the spoon stroker being explained.

https://youtu.be/2JNnzqwTUMI

You can jump to the 2:30 mark.

Good luck.

Lou Connor

It's actually just an Oem Honda F22/ap2 crankshaft + rods and f20/ap1 pistons. Spoon do not manufacture any part of this kit.

I just bought the AP2/f22 crank from Honda in japan and a set of OEM rods from the states, arp hardware, using the stock pistons. It nets 11.7 cr or 12:1 cr with the thinner headgasket.

I didn't have to buy new rings or bore the block as they were in perfect condition as they were.

It will be as reliable as the standard engine, with the added assurance of the arp hardware.

Right now i'm having aftermarket rods made up to work with the standard pistons. That would enable a 8800-9000rpm reliable 2.2 stroker kit for around £1500

Mrsideways

It won't make any more power then an F22 at the same RPM. Compression is virtually the same, most other factors that control power output aren't being modified. Grab a used F22 from the states and ship it over and save yourself a bunch of headache and time. Plus you have the unknown reliability of a Sleeved rebuilt motor. I've seen a lot of sleeved motors have issues some built by really good machine shops, it's hit or miss. What you'll pay for a good used motor is about what you'd pay in just machineshop work, gaskets, bearings, and labor to assemble a rebuild.

Lou Connor

You dont have to sleeve the block.

The 'spoon stroker kit' is just oem Honda parts.

F22c crankshaft
F22c rods
F20c pistons.

It nets 11.7 cr or 12.0 cr with a thinner headgasket - thats just what the f22c crank and f20c piston combo achieves.

You already have the pistons, so if you are looking to go down the 2.2 route, just purchase the F22c crank and rods. That's what I did, blueprinted and balanced everything myself, no need for a machine shop as my bores and piston rings were fine the way they were.

If anybody required a 2.2 oem stroker engine, exactly the same as the spoon setup, providing the bores/compression is good... I can build these engines for under 2000 pounds. Thats with brand new oem parts and ARP hardware.

I'll have to start a build thread...