I searched using the "Google method," and apparently some have put the F20C ECU in an F22C equipped car, but I'm wondering if I could slip an F22C shortblock between my F20C head and oil pan and be good to go. Naturally with the SC I'd want to make sure the AFR was OK, but what other problems should I expect. Is it even possible, or has it already been done?

 

Oil pans are the same, and it would surely bolt right up. Only problem is, F22 + 9k + FI is going to be iffy. 9k alone is pushing it, but has been good in my experience.

This brings to mind something I've always wanted to try, it would be the same as your proposed setup:

-AP2 with AP1 cams, or

-AP2 with AP1 intake cam only
-AP2 with AP1 exhaust cam only

-AP1 with AP2 cams
"
"
There are many combinations to try, to alter the powerband.

 

Thanks Bill. I only recently started taking a critical look at the engines and thinking it might be cool to do a little mix and match. I've always liked short stroke engines (in sports cars at least) and I've never stroked an engine, but the idea of a "stock block" with a longer stroke is enticing.

I was just thinking that if I could pick up a salvage car at the right price it might be an interesting thing to try, but I wasn't sure it was even possible. We could probably get about the same peak HP increase by putting an AP2 pully on the SC, but I don't think we'd get the same increase in bottom end torque even though boost would be higher across the band. The centrifigual blowers just don't make a lot of boost down low and the longer stroke might be be fun.

Now that I think about it, I'm not sure my injectors have enough capacity to handle the increased capacity.

Maybe it's a bad idea, because it's a hell of a lot of work to un-do if it doesn't work out.

 

Been thinking about this a little more and want to see what you guys think.

With my SC/AC and OEM injectors I can use the F22C SC pully to get more boost, and peak RWHP will go up to around 310-320. As I understand it, that's pretty close to the limit of the stock injectors (and is actually pushing things a little). A 10% increase in displacement would not produce a 10% increase in power or fuel requirements, but 10% would probably put me over the top (at about 330WHP) as far as the stock injectors go.
Since we wouldn't actually see quite that much gain we'd probably be OK, but it's going to be marginal at best, without larger injectors, ECU, tuning, etc.

However, I'm thinking that the SC might actually lower the stresses a little at peak revs. Both the boost, and the limited flow of the stock exhaust given the extra flow, would work to resist rod stretching somewhat. I'm pretty sure the pressure on the top of the piston matters at high revs and affects rod stretch, but don't have a clue of how much of a factor it actually is. The bottom end might actually be better off (with FI) at peak revs.

At this point I'm thinking that this might work, but that it's risky at best.

 

any update with changing the ap1 cams onto a ap2 motor?

 

Need more info on all of this.


Any reason why the f22 would have a problem with 9K rpms?