| Questions | Answers |
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| Do I get +50hp if I chiptune (yadda, yadda) my engine? | No, you don't, unless you're having a supercharged engine, in which case maybe...Usually getting more than 5-10% power requires some serious tuning like changing parts and machining stuff and so on. |
| How do I chiptune my L(E)-Jetronic? | You don't, it's an analog system that doesn't have a "chip" |
| How can I get a fuel-pressure meter? | Story has been on the opeltuners.com list that one could use an oil-pressure meter for that |
| How do I tune my engine easily/cheap/whatever so I could achieve X more hp's? | You don't, there's no such thing. Tuning requires loads of money and time and there's no short way out. The first thing would probably be to adjust your cam and ignition and such. Next a new camshaft and before you have that working ok you probably have spent roughly 5 times the money you spent on the shaft itself. |
| How do I recognize my CIH-head? | Take a look at the head on the left side, just in front of the small hatch to the camshaft. There are some letter indicating the type of head, X20S, X20E ASO |
| What exhaust-header should I use in my Ascona/Manta? | The standard, cast-iron header for the injection engine should be enough for up to 180bhp. Easiest to use, isn't affected by rust, doesn't bend of heat... |
| What ball-joints should I use for my Ascona? | "Jyrkijuhani" suggested on the list: "Try Sidem-parts, it`s made like originally
(not iron against iron,there is nyloncup? like org.)
but it`s four times cheaper." update"Jyrkijuhani" told me that the local dealer for these parts is probably Hessumobiili. |
| Where can I find technical info about the CIH engines? | Here: Opel Tuner's Source |
| How do I tune my engine for more power/torque/whatever? | There's no short answer for this, however:
First you should have a look at the model of your car, the preferred method should
always be to enlarge the engine up to the largest available for your car.
For an Ascona/Manta the easiest way would probably be to first get a C24NE
engine and install that. If that is not enough, you have a much
better starting point in your tuning.
You could also install a larger engine than the largest availabe, it is well
known that you can install a straight six in an Ascona. These are available
up to at least 4.0l. And if that isn't enough... well... sad.. :) update 11 Jan. 2002 The first thing to do, is to take off the head, and bring it to a good machinist that is able to re-do the valve-seats. The original 45° seats flow awfully bad. Then the inlet ports can be cleaned a bit along with some lightening of the valves. Use a 288° street-cam, maybe? Don't touch the exhaust ports, they shouldn't be a problem. If you want larger valves, spend your money on larger and lighter inlets. Story goes that this alone could give some healthy 150-160hp, with a good deal of torque (+200Nm) right from 1500 rpm. Nice daily engine, not? |
| I want better brakes in my ascona/manta... | The most "bolt-on" solution is to use the brakes from a Rekord E, 2.2i. These are ventilated disks with the same diameter as the original. You are encouraged to use the double-piston ATE caliper from the Rekord too, these have 52mm pistons, whereas the original have 48mm. You will have to use other (larger) rims though, the ATS 13" rim with a 30mm ET will not fit for instance. The caliper "sticks out" too much. Use a 14-15" rim. Some 14" rims don't fit either (Manta GSi original), according to some german forum. The hub will require machining as well. If i'm not wrong, you would have to put the hub in a lathe, and turn off 4mm of the outer circle. Otherwise the caliper will not allow the wheel to turn, or the caliper will not fit. Some people have breadend their original 48mm ATE pistons, using home-made pieces and longer 12.1 bolts. Risse Motorsport has a kit for this. Your life is dependant on your brakes! So, be thorough if you choose to go this way. Always use o-ring seals that are specially suitable for brake-fluids and so on. |
| What's the difference with 1.5-2.0l and 2.2-2.4l CIH cylinder heads? | The earlier CIH engines had the inlet ports at about the same height as
the exhaust. The 2.2 and the 2.4 engines have inlet ports a bit
higher up. Due to this reason, inlet manifolds from < 2.0l
engine heads are not usable on a 2.2 or a 2.4 head (and vice versa
of course). The exhaust
manifold does fit criss-cross. N.B. that the six-cylinder CIH has the same "high" inlet ports as the 2.2 and the 2.4 liter engines. This is why people are using a cut-down version of the six-zyl manifold on their engines. Read more about valve sizes and so on on opeltuners.com There are differences in the amount of camshaft bearings as well, the later heads have four, and the older ones have three. |