If anyone is still on here let's get some talk going again.

I have a simple all motor b20 build planned out for a weekend "drag" car, it's going to be in a really light crx hf, goals will be mid to low 12s. I already have the cylinder head done and will be using that for the build, it has a full port job by myself, crower 404 cams with vms cam gears, supertech single valve springs and retainers, the head is fitted with a ported b16 intake manifold but I will probably try to weld up another b16 intake manifold with a b20 manifold plenum for more volume on it, might try to play around with some itbs, either home made or obx, that will be down the road though. The bottom end will be stock rod with arp rod bolts and probably 85mm b16 pistons off eBay. I plan on finding any cheap b20 block I can that's build able and doing some moroso block filler in it for added strength. I'm hoping to make 200whp out of the setup at the least and will continue to make changes to it to get there. If I can carry 145 ftlbs to 7500 it should make just over 200whp. Goal weight for the car is 1700 or less with the driver. It will have a fuel cell up front as well as a small battery up front. No interior just seat, steering wheel and cluster zip tied. Cut out most of the sheet metal. Really excited for it. Should be a very budget minded build.

Zeal autoworks estimates it at 12.1 to 1 comp. I think that would be about border line for working on pump gas but it really depends on how the cams respond to it. I can play with cam gear adjustments to get the dynamic compression ratio to where it would run on pump just fine.

Just ordered 85mm b16 pistons today. Been thinking about the project allot, I think that having a larger plenum for this sized motor would be benificial so I'm gonna source another p30 intake manifold and I have a b20 giraffe plenum cut off already to put on the b16 intake manifold. I will port the b20 plenum and make sure the runners have a slight taper as well. Just need to source a tranny now. I was originally thinking a ls tranny would work well but now I'm leaning towards b16 trans since I'll be able to rev it to 8-8500 depending on when the power falls off and I'd like to run either 22 or 23" slicks depending on what I can get my hands on for cheap.


Anyone still on here building stuff? Post your builds. It makes me sad that the forums are dying 😭

I understand that very well. I've been tuning for a living since 2010 so I get to see allot of what works and what doesn't work. I'll put it together with the estimated cr of 12 to 1 and if I feel it needs more comp i can always deck the head or one ply the head gasket. Picking up a builder b20 block tomorrow with crank, rods and phk pistons for $100.

Bottom end is starting to come together. This is the first bottom end I've ever assembled myself. I don't know why it took me so long to dive in but so far it's really fun. Only issue I had was the one set of rings I didn't check gap on which was the oil spacer ring ended up being way to tight stopping the pistons from wanting to drop in. Gapped then and everything went together like butter. Using acl race bearings and all clearances are just about perfect.

Something I've been working on. 84.5mm b16 piston b20. 404's, custom built intake manifold for dual throttle bodies in a super light crx.

Let's keep this thread alive. Anyone have anything cool in the works they are building? this is my intake manifold, built from a b16 lower half and some 3" aluminum piping and 11gauge aluminum for the end pieces. Should have some videos of it running by next week at some point.




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Finally pulled my 403s out of the box and got them installed. Time to find a dyno to rent some time on and get to work.

You are gonna like those 403s. They make power from 1500-7500 pretty damn solid over stock cams.

Yeah the idle like stock just a little louder. If you end up wanting it to lope you can adjust your cam gears for a little more overlap or run it lean at idle. That's one of the things I enjoy the most about cammed non vtec motors is the Lopey idle.