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Originally posted by subz
Thanx for the reply...
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My pleasure for sure.
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Originally posted by subz
Mods we can do....Forged pistons, solid lifters etc, balance, Cams, dry sump (if you can afford it) etc etc
Money being the key issue.....
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Funny how it always comes down to that, eh?
You can do a lot more than we can in the class we run (lightly modified from street trim). We are exploring building a car for the next class up that will allow us to do all that. We're still doing research. We originally wanted to do it for next year, but I don't think it's realistic. We are still developing our current car and still have much to do. Besides, my car owner has only been out once this year and I've only been out twice. LOL! We do have an enduro coming up in two months, but now I'm just blathering on.
Can you run the Quaife LSD? That has been getting raves from the folks who are running them (no racers yet, but we do have a couple of people who do extensive lapping in their road cars). Some have reported gains of over a second a lap!
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Originally posted by subz
Is the standard SR20DE safe at 220HP??? will it turn into a hand grenade??
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Oh man, the SR20DE is not even breaking a sweat at 220 bhp. We have some blokes here running crazy turbo set-ups with stock bottom ends (9.5:1 compression in The States) and getting over 400 bhp. This engine was clearly designed with racing in mind. The bottom end is nearly indestructable. The only problems we've really seen are some spun bearings (usually due to oil starvation) and occasionally the rod bearing caps separating from the rod resulting in a ventilated block as you can imagine. There are HD bolts for the rods though that should eliminate this issue (and it's pretty rare).
You have nothing to worry about with the bottom end.
The Achillies Heel with the SR20 is the hydraulic lash adjusters. Even slight over revs usually result in throwing rockers. With the hydraulic lifters, 8k rpm is the absolute limit and that's pushing it. About 7800 rpm should be considered redline. If you convert to solid lifters, you won't have nearly the worry about this.
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Originally posted by subz
MAF= Whats that mean???
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Mass Air Flow sensor
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Originally posted by subz
Also...have you have any problems with oil surge???
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That's pretty rare. I think I've heard of one person who had trouble with that. We have a lot of folks who run their SR20 powered cars
hard on race tracks regularly. I think it's a non-issue. The sump is pretty well baffled. A little more baffling in the pan can certainly help. We've had a few people talk about doing that, but so far no one has done it - I think because it's not a real problem.
One thing you do need to worry about is water pump cavitation. The SR20 waterpump cavitates at high rpm (over about 6500 rpm or so) and that can cause overheating. There are underdrive pulleys available that will slow down the waterpump and they cure that problem completely.
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Originally posted by subz
See ya mate...
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You bet! Good luck to you mate!
I can put you in touch with others who either race cars powered by the SR20 or are building them now.