SpeedyRotary

Before I purchase my FD I am having the guy run a compression test to make sure the engine is ok. Now when he gets this done what should I expect to be looking at? Will they give him a form of what his compression is and if so what kind of numbers should I be expecting for a good engine (68k miles)??

Also if I get this car, I plan on replacing the hosings on the car first. How much would it be for some silicone hosing? I want to do it myself and I'm not really sure on how much hosing is required. What would be the diffuculty of this project? Would I have to remove anything from the car to replace the hoses or can I manage it without taking stuff off? I think that covers it, thanks everyone that helps.

CowsniperRX7

iTrader: (3)

also get a boost gauge (or borrow one or somethin) and hook it up (unless it allready has one) and check the boost pattern, im not sure what it is so i wont give you false info(im sure you could easily find it out on this forum), but im pretty sure the vaccume at idle should be around 18-20

SpeedyRotary

What about the vaccum hoses?

Mahjik

iTrader: (1)

Basically, don't mess with them unless you already have a boost problem.

SpeedyRotary

Say if the 2nd turbo doesn't kick in at all?

Mahjik

iTrader: (1)

Well, that doesn't mean you should replace all the vacuum hoses. There are other causes for the 2nd turbo no coming on besides doing the vacuum hose job.

First thing is to see what the boost pattern is, what RPM range does the boost fall off, and what the vacuum readings are... That info will give you a good place to start looking for the potential problem.

SpeedyRotary

Well, the car does not have a boost gauge so I can be sure. I just know from driving other rx7s with proper boost is that I can feel the 1st turbo spool up when it should then when the 2nd turbo is supposed to come in it just isn't there. Does that help?

Mahjik

iTrader: (1)

Nope, you are really only guessing until you hook a boost gauge up. That's the only way you know what's going on and how to verify that you've actually fixed it (once you get your hands dirty).

Boost gauge should be the very first thing you get. It's really a must on these cars with the amount of boost related problems that happen or can happen.

SpeedyRotary

Ok then, what is a decent boost gauge to purchase?

Mahjik

iTrader: (1)

Any of them are decent. You'll get people that have had bad experiences with every brand, so just pick one you like, and order it.

http://66.216.67.51/subcat.asp?0=212

SpeedyRotary

If I got the dual pod thing, what two gauges would you recommend having first?

Mahjik

iTrader: (1)

Either a water temp or a fuel pressure gauge..

For some reason I purchased a EGT gauge, which is basically useless for me. If I had it over to do again, I would have a fuel pressure gauge instead right now.

SpeedyRotary

How hard is install?

Mahjik

iTrader: (1)

lol, just post a message on the KC group message list... Someone will be able to help you out when it comes time for installation..

SpeedyRotary

ok, I kind of like the DEFI boost gauge and fuel pressure gauge..

cafe

Is your REX stock? otherwise you need a/f or EGT gauge to measure how rich and lean you're running. COrrect me on this

SpeedyRotary

It is stock except for aftermarket exaust, not sure what type the owner before the guy I am buying from put it on.

Mahjik

iTrader: (1)

Nope, those two things don't really do squat unless you have a wideband.

If you are tuning without a wideband, you may as well be driving with a blindfold as well...

cafe

Are you planning to Mod your REX? For now just get a boost gauge and take your time searching in this forum then start modding.

SpeedyRotary

I'll probably go with the DEFI boost gauge and fuel pressure gauge.

SpeedyRotary

I am going to mod it, but I want to keep it stock for about a year so I can get used to the car and do some research on mods etc.

Mahjik

iTrader: (1)

If you are going to stay stock for at least a year, get the temp gauge first instead of the fuel pressure. The fuel pressure won't do much for you until you start modding.

cafe

Let say you just added 1 mod to your car and you don't have money to dyno tune it. EGT should help

Mahjik

iTrader: (1)

What the hell are you going to dyno tune with only one mod? If that mod isn't a programmable ECU, you can't tune squat.

SpeedyRotary

Ah ok thanks guys