Single Turbo RX-7's Questions about all aspects of single turbo setups.

MIke...Drum roll...and the compression test read ????

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Old May 30, 2001 | 09:19 PM
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MIke...Drum roll...and the compression test read ????

How did the test come out ??
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Old May 31, 2001 | 10:23 AM
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drum drum drum- Wait! They canceled my appointment and told me to come back Monday.



They also wanted me to drop off the car in the morning.. Hahaha.

I told them I would bring it in the afternoon and help them do the compression check. I do not want anyone driving my car/working on it without me there.

---

I did find 1 good thing. I found out why its smoking so much. After learning some new information (yeah, you know.. things you miss); my oil feed line is suppose to have a restrictor pill. The standard flow of the stock oil lines into the turbo is 110 psi. The turbo only wants 60 psi. Ack!

Getting that fixed asap.

I will let you know.

Thanks,

Mike
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Old May 31, 2001 | 11:00 AM
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Mike, You can kind of do your own "cheap" compression test. Take the leading plug out of the rear rotor housing and place your hand over the spark plug hole (2 inches away) and have a friend turn the motor over. Feel for 3 pulses that are the same..if not there is probably a problem. Also do the front so you can compare. (Pull out the fuel pump fuse, and pull of the boots to the other spark plugs)........

[This message has been edited by Mr rx-7 tt (edited May 31, 2001).]
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Old Jun 4, 2001 | 02:45 PM
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Well, here is some interesting news:

when I dyno'd 313 rwhp @ 15 psi, it was at 11 degrees of timing. I found the car was off completly 4 degrees of timing. I didn't have a chance to take it back to the dyno shop since, and I won't.

The compression test today shown:

Front rotor: 5.4 - 5.6 - 5.6
Rear rotor: 4.0 - 3.8 - 3.6

hmm.

A little far off from 9.0. How far down does ports take it?

Mike
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Old Jun 4, 2001 | 05:58 PM
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If that's from porting you need to get the guy porting it to work on his consistancy. I think that's just a fuz more than porting would do!

Steve
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Old Jun 4, 2001 | 07:38 PM
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Mike, Sorry to see those readings. Those # are very low...I believe you already know..rebuild time...Who built and ported your motor ? If I were you I would chuck the 3mm rotors and get some good 2mm rotors, use the Hurley seals and springs and the teflon H20 seals. I just finished my motor, build a friends bridge ported motor the week before and this coming weekend I will build my other friends motor...(when it rains it pours)....
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Old Jun 5, 2001 | 04:41 AM
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sorry to say it dude, but it looks like your rear rotor is fuckaroonie'd.

thats some good numbers for one rotor though
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Old Jun 6, 2001 | 02:15 AM
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At least it still runs.

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Old Jun 6, 2001 | 05:03 AM
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it could be that your side seals are knackered, i'd ask peter or chris for their opinions
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Old Jun 6, 2001 | 03:38 PM
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How old was the motor?? Was it ever overheat or gotten too hot?? I bet it's more and likely just the apex springs flatten.


Originally posted by Red-Rx7:
Well, here is some interesting news:

when I dyno'd 313 rwhp @ 15 psi, it was at 11 degrees of timing. I found the car was off completly 4 degrees of timing. I didn't have a chance to take it back to the dyno shop since, and I won't.

The compression test today shown:

Front rotor: 5.4 - 5.6 - 5.6
Rear rotor: 4.0 - 3.8 - 3.6

hmm.

A little far off from 9.0. How far down does ports take it?

Mike
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Old Jun 6, 2001 | 03:45 PM
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From: Kansas
Steve-

Motor has 7k miles on it. I have never had the engine over heated in its lifespawn to my knowledge.

What could I do to 'unflatten' these springs? Anything besides pulling the rotors?

Mike
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Old Jun 6, 2001 | 06:39 PM
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From: Virginia
Originally posted by Red-Rx7:
Steve-

Motor has 7k miles on it. I have never had the engine over heated in its lifespawn to my knowledge.

What could I do to 'unflatten' these springs? Anything besides pulling the rotors?

Mike
Once the springs flatten (due to heat) thats it..The motor must come apart. Overheating which flattens the seals (if the case) is caused by too much timing, lean condition or over reving.



[This message has been edited by Mr rx-7 tt (edited June 06, 2001).]
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Old Jun 6, 2001 | 09:02 PM
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Old Jun 7, 2001 | 12:33 AM
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Originally posted by Red-Rx7:


At least it still runs.

I wouldn't run it at all. It can cause major engine damage (destroy rotor housings) if a seal lets go..It will cost a TON more to rebuild.

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Old Jun 7, 2001 | 08:17 PM
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some people say you can use compressed air thru the oil passages to push them back out!... Worth a try isnt it ?

------------------

http://www.want2race.net
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Old Jun 7, 2001 | 10:37 PM
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Originally posted by Want2race:
some people say you can use compressed air thru the oil passages to push them back out!... Worth a try isnt it ?

They are heat tempered and sag due to the loss of the "tempering" that took place during the manufacturing of the spring...Snake oil would work just as well as compressed air...

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Old Jun 7, 2001 | 10:48 PM
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From: lebanon
LOL.......COMPRESSED AIR!!!!!!!

HAHAHAHHAHAHAHAHAHAHA.

**** me that is soooooooooooooo funny.

OMG, I have to go lie down
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