Datsun Roadster Forum-311s.org

wow! I think that's a little more hp than Greg's "Mighty" U20

Very impressed it looks fabulously tidy!

Alvin wrote:wow! I think that's a little more hp than Greg's "Mighty" U20

Very impressed it looks fabulously tidy!

Perhaps, perhaps... she'll be on the dyno this spring with proper cam timing to see what's what, but it is hard to compete with forced induction and 20 years of mechanical improvements. Maybe I can add a power adder like NOS to make it more "fair"... but then again, an R16 with Mikuni's and NOS did not present a challenge before I did the head and cam...

Honestly, according to my engine guys the CA engines were a better design than the SRs in many ways.

One of these days we'll go fender to fender... SR vs U20... Shasta? Considering the altitude, I would be better off at a lower elevation since I have no computers to adjust my fuel ratios for me.
Love you Alvin. You're a good fisherman... always fishing for me!

Greg what do you think your U20 will do on the dyno?
If I had the choice to put in a U20 with a 5 speed in my car I would do. but you can't purchase these engines over here or they are very expensive.
An other thing is that I can buy parts on every corner for my CA18DET.
This spring I will place him on the dyno too. Later maybe with an Stage 1 chip, depends on how fast she is.
But first I hope to get all the small problems disappeared.
And Alvin, Thanks.

Best she ever did was 131hp at the wheels but had some carb issues (suddenly lean in places), but after I did the bigger valves and different cam it DROPPED to 124 hp and acted weird... turns out my cam timing was way off. Since getting JT68s adjustable gear and eyeballing it back to stock specs (honestly, who knows how close I got without really calculating it?) it is much stronger and more flexible than it ever was. I would hope for 140 or so at the wheels, but who knows, could be more, could be less. Also, dynos vary, so it is not completely accurate to compare dyno numbers across different dynos, but all my pulls have been on the same dyno.
I honestly don't expect to be able to compare to what a forced induction engine will produce, especially a more modern design with muli-valves, lighter components and improved machining techniques. The stock CA18DET was rated at 178hp (crank) wasn't it? I'm sure it can produce a lot more with more boost and proper fuel delivery. My Toyota Celica GTS produces 180hp (crank) at 7800 rpms (1800cc engine) normally aspirated with 11.5 to one compression and varaible cam timing, so one can see how much technology has changed.
Regardless, I'm enjoying the engine more now. I think the CA is a cool engine, and if given the choice it would be what I would select if doing a modern swap (I've also kicked around the idea of a turbo R16... we think 180-200hp would be an attainable target, but I doubt it will get done any time soon, and I have only one car). Nissan didn't cut any corners on the CA engine other than using a timing belt... I fixed a normally aspirated version that had bent several valves when the belt stripped a couple teeth.
I think you're gonna love it. Glad to hear it is all coming together for you!

Video from the running engine, exhaust gasket is leaking a little and the smoke is from the cooling water that's heated for the fist time, smoke from the turbo is also from old oil.
http://vid163.photobucket.com/albums/t2 ... y9gdkm.mp4

Very nice Peter. Great job.

Steve

Cool!

is it possible to use the oil sender from the Datsun engine for gauges from Classic instruments, they need a resistance from 244-33 ohm.
Now you can say put one in from Classic instruments, but the are larger and I'm afraid they don't fit in my engine/ chassis space.

Nice to the see the avatar photo shot up and running! Thanks for sharing across the ocean. Not so easy to do
in the 70s when I built my engine. Or a great mentor and friend built it for me...

Sometimes it necessary to run a hose to the sender mounted off the engine.....Just like a remote oil filter.

Phil

Thanks Phil, that would be a possibility, do you now the resistance of our oil sender?

I told you to show you a video of the running engine, and I made one from a short run.
I made this video because I have a small problem with the idlle, when the engine comes out of turboblast, it reflex on the AFM.
They told me to make a cross in the tube before the AFM so there will be turbulence.
And my gearbox make noise, later I have to replace the bearings.
http://vid163.photobucket.com/albums/t2 ... wlgk5w.mp4
http://vid163.photobucket.com/albums/t2 ... iopaud.mp4

peter wrote:is it possible to use the oil sender from the Datsun engine for gauges from Classic instruments, they need a resistance from 244-33 ohm.
Now you can say put one in from Classic instruments, but the are larger and I'm afraid they don't fit in my engine/ chassis space.

Why not a mechanical sender oil pressure gauge?
They should take up the least space and be most responsive.

msampsel wrote:

peter wrote:is it possible to use the oil sender from the Datsun engine for gauges from Classic instruments, they need a resistance from 244-33 ohm.
Now you can say put one in from Classic instruments, but the are larger and I'm afraid they don't fit in my engine/ chassis space.

Why not a mechanical sender oil pressure gauge?
They should take up the least space and be most responsive.

I don't like oil tubes inside the car, I prefer Electric wire.

peter wrote:Thanks Phil, that would be a possibility, do you now the resistance of our oil sender?

No, but others will know.