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> Compression test values for a rebuilt TIV
Dr Evil
post Aug 22 2006, 08:37 AM
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I have someone offering a friend a "reacently rebuilt" TIV engine and two things stick out to me that give me pause.

1) The current owner claims that the engine was reacently rebuilt, but does not know what size it is. He "thinks" is a 2.0. (IMG:style_emoticons/default/WTF.gif)

2) Claims 110psi more or less on all cylinders. Sounds low to me for new rings and honed cylinders. I am assuming that they are run in, though.


Waht are your thoughts? What values would you expect form a reacent rebuilt?
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bondo
post Aug 22 2006, 08:41 AM
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Low compression bus pistons? You might be able to tell through a sparkplug hole.
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ptravnic
post Aug 22 2006, 09:03 AM
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Dr - I just spoke w/Rich and said the same thing that 110psi seemed a bit low but the Hayne's manual should have a rating on this.
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Dr Evil
post Aug 22 2006, 11:08 AM
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Probably, I am in class right now so no manual here.
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mihai914
post Aug 22 2006, 11:17 AM
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Last time I did a compression check on my 2.0 I had readings in the 150-160 range. I still don't know what is inside the engine exactly but it looks mostly like everything is stock. The intake runners are so free of carbon it makes me think that the engine was rebuilt not long before the car sat for 15 years. HTH
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Dr Evil
post Aug 22 2006, 11:51 AM
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Thanks man, those are the numbers I told him. I was pretty sure but wanted a second, third oppinion.
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bd1308
post Aug 22 2006, 12:51 PM
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I heard 160 from my bus buddies.

Im thinking its less than new.

b
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Aaron Cox
post Aug 22 2006, 01:09 PM
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QUOTE(mihai914 @ Aug 22 2006, 10:17 AM) *

Last time I did a compression check on my 2.0 I had readings in the 150-160 range. I still don't know what is inside the engine exactly but it looks mostly like everything is stock. The intake runners are so free of carbon it makes me think that the engine was rebuilt not long before the car sat for 15 years. HTH


the intake runners would get carbon how?

combustion takes place inside the head, and fuel is only intorduced into the runners at the very end (Injector points at the valve) so only air is flowing thru them.... not a source of carbon (IMG:style_emoticons/default/smile.gif)
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Engman
post Aug 22 2006, 01:09 PM
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110 = low

you might look at it - depending on the price.

Something donna feel right.

M
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nycchef
post Aug 22 2006, 01:25 PM
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allow me to introduce myself. i am the unamed friend of dr. evil who was looking at the wierd type four with low compression or bus pistons or what the hell. i'll let it go. will rebuild my 1.7 but you guys are suffer through it with me. now let's begin. pete do you want to sell your extra 1.8 heads.
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rjames
post Aug 22 2006, 01:29 PM
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(IMG:style_emoticons/default/agree.gif)
QUOTE
Last time I did a compression check on my 2.0 I had readings in the 150-160 range.


That's where my 2 liter was after the PO did a rebuild.
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SirAndy
post Aug 22 2006, 01:34 PM
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QUOTE(mihai914 @ Aug 22 2006, 10:17 AM) *

Last time I did a compression check on my 2.0 I had readings in the 150-160 range.


(IMG:style_emoticons/default/agree.gif) my 2056 had between 155 and 165 ...

(IMG:style_emoticons/default/smile.gif) Andy
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Engman
post Aug 22 2006, 01:36 PM
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QUOTE(nycchef @ Aug 22 2006, 03:25 PM) *

allow me to introduce myself. i am the unamed friend of dr. evil who was looking at the wierd type four with low compression or bus pistons or what the hell. i'll let it go. will rebuild my 1.7 but you guys are suffer through it with me. now let's begin. pete do you want to sell your extra 1.8 heads.



It all depends upon the price. Look at it and see if

1. 2.0 heads
2. condition of case

It could be a better candidate for rebuild than the 1.7/1.8.

I bought a 2.0 engine that rotated w tranny and exhast for $300 a couple of years ago.

Turns out that one head had a piston missing chunks and needed a complete rebuild. But I got the tranny and exhasut - which were woth more than $300.

And I am still slowly rebuilding the engine.

M
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ptravnic
post Aug 22 2006, 01:39 PM
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QUOTE(SirAndy @ Aug 22 2006, 03:34 PM) *

(IMG:style_emoticons/default/agree.gif) my 2056 had between 155 and 165 ...



Sir Andy - What types of heads are you using on your 2056? 1.8L or 2.0L?

Chef - we'll talk later this w'end. Not sure what the heads look like when we take them off. They are coming off for a reason after all... (IMG:style_emoticons/default/blink.gif)

-pt
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Dr Evil
post Aug 22 2006, 01:59 PM
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What you need to do, Rich, is either rebuild the 1.7 stock (not my first choice) or locate a good core 1.8/2.0 and rebuild it to what you want.

What = a 1911?
What = a 2056?

I forget which rod, crank, p/c combos go to each. If you get this info you can start to plan your attack. Is Leo keeping his engine?

For the record, what the guy wanted for the unverified size, rebuild and compression engine was not worth the parts.
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SirAndy
post Aug 22 2006, 02:07 PM
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QUOTE(ptravnic @ Aug 22 2006, 12:39 PM) *

Sir Andy - What types of heads are you using on your 2056? 1.8L or 2.0L?


the engine had 2.0L heads ...
(IMG:style_emoticons/default/smile.gif) Andy
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SirAndy
post Aug 22 2006, 02:08 PM
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QUOTE(Dr Evil @ Aug 22 2006, 12:59 PM) *

What you need to do, Rich, is either rebuild the 1.7 stock (not my first choice) or locate a good core 1.8/2.0 and rebuild it to what you want.


and why not use his 1.7L case to build a 2056 or whatever he wants ???
(IMG:style_emoticons/default/confused24.gif) Andy
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nycchef
post Aug 22 2006, 02:13 PM
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QUOTE

and why not use his 1.7L case to build a 2056 or whatever he wants ???
(IMG:style_emoticons/default/confused24.gif) Andy


andy was under the impression 1.7 heads could'nt be built out to either a 2.0 or 2056. am i wrong again?
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ptravnic
post Aug 22 2006, 02:13 PM
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QUOTE(Dr Evil @ Aug 22 2006, 03:59 PM) *

What = a 1911?
What = a 2056?



I *think* a 1911 is stock 1.8L crank/rods w/96mm P/C's.

I *know* a 2056 is stock 2.0L crank/rods w/96mm P/C's.

I forget what mm stroke the crank and length rods are on stock though (IMG:style_emoticons/default/sad.gif)
2056 is said to be the max to be used w/the slightly modified (dialed in MPS) D-Jet.


-pt
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ptravnic
post Aug 22 2006, 02:17 PM
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QUOTE(nycchef @ Aug 22 2006, 04:13 PM) *

QUOTE

and why not use his 1.7L case to build a 2056 or whatever he wants ???
(IMG:style_emoticons/default/confused24.gif) Andy


andy was under the impression 1.7 heads could'nt be built out to either a 2.0 or 2056. am i wrong again?



Andy was talking about the case. You would need different heads (either 1.8L or 2.0L) then 96mm pistons w/either matching cylinders or get the 1.7L's honed out to match the 96's.

You'll see all of this first hand this w'end as my setup is 96mm p/c's, stock 2.0L crank/rods, 1.8L heads all built off what *was* a a1.7L case. The 1.7L case can be used for the other sizes...

-pt
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