buncha questions (13 to be exact) - yet again, I am in need of answers

[Venom TypeR]

13 more questions for you all:

1.  What does a turbo blowoff valve do and when is it needed?

2.  What is a wastegate?

3.  Do most/all D engine series parts fit ZC engines?

4.  How much are most engine mounts for a b16 swap (i've heard 躔, but I know JDMhondaparts has them for 蹉)?

5.  Other than ecu, tranny, and mounts, what else is needed to swap in a b16?

6.  What is a good price for a swap on both a b16 and on a ZC?

7.  What does purging [NOS] mean?

8.  What does something like a Venom 400 control modular do that says it'll increase HP 25%?

9.  Does anyone here autocross?

10.  Removing cat, good or bad?

11.  I've seen many crxs with frames around the taillights, where are they from?  Were they a stock feature for some crxs?

12.  Is installing springs easy enough to do it yourself, or does it need to be done at a shop?

13.  How can I find the right bulbs that will work in my headlights?  Does basically anything work?

Any/All of your answers will be greatly appriciated.
Thanks in advance

[Phiber Optic]

1. it releases the pressure in the intake charge pipe from being forced back toward the turbo (which could cause damage to the turbo)

2. a wastegate is an alternative route for the exhaust gasses to exit the car withought going through the turbo and creating hp. which controlles overboost and boost spike.

3. i think all the parts of a d series fit a sohc zc, not sure about the dohc though

4. 300$ or so

5. dunno

6. free

7. i think it gets rid of air bubbles and pressure from running the nitrous and helps to prevent detonation.

8. dunno

9. i don't

10. good and bad, more hp but louder and less legal

11. i think thoes are stock on the 90 and 91 rexes

12. easy to do yourself, the hardest part is compressing the spring.

13. i wish i knew

hope this helps, and as always i could be slightly off in some areas.

[Phatwhippin CRX]

1. Releases pressure on the copressor inside the turbo, allowing free-flowing air and continued boost. Without it, the pressure would actually spin itself backwards under high boost.

2. Read Phiber's

3. When it comes to like bolt-ons and shit, yeah. I Think it is, but not like cams and shit, I think they are different.

4. 蹢 for the HASports

5. Enigine,tranny,ecu, shift linkage, mounts, axles, wiring harness. YOu should also change the clutch, water pump, timing belt, alternator belt, spark plugs, header.

6. free, or 躔-񘈨

7. Purges any air out of the lines, so it is straight NO2 running the line into the motor.

8. Increase ful flow, ALOT. If you have a heavily modified car, more fuel to burn = more power. But unless you are REALLY heavily modded, it aint worth the $$$

9. No

10. Good, if ya don't get caught or fail smog........

11. 90-91 CRX had them

12. Depends how mechanically inclined you are, have a spring compressor?

13. High- 9005
Low- 9006

[Venom TypeR]

Can a turbo have both a wastegate and blowoff valve?

[Phatwhippin CRX]

Yeah, most kits come with both.