My 88 ci

[rapidray]

Jeff, put a ten thou base gasket in it & be done with it!!! Ray.

[bellucci]

Jeff does do his math, good for him...
Curt

[davel]

The crank and rods strech about 0.040" at redline

This is interesting. I'm putting my 79 KZ1000ST (1075) back together and was planning to run 0.035 squish clearence (0.015 deck height with an 0.020 copper gasket) Is this unadvisable?

[rapidray]

This is interesting. I'm putting my 79 KZ1000ST (1075) back together and was planning to run 0.035 squish clearence (0.015 deck height with an 0.020 copper gasket) Is this unadvisable?

HIGHLY unadvisable!!! With a zero deck height, you need a .043 thick head gasket. You want NO less than .043 piston to head clearance once assembled. Ray.

[davel]

Good to know...Thanks Ray!

[trippivot]

I need to ask

the KZ deck clearances are identical as a GS. remember to bolt the cylinder down hand tight when measuring .

do you mean 035 total piston to head? or 035 over and above everything together?

0.035" is too tight if that is a total "static" piston to head clearance measurement.

However if everything added together like the .015deck/.020base/.043head/= .078total -.040sling out =.032 super safe and fine.

if I have understood your question wrong I'm sorry PM or call me if you like 563 940 3734. Tech math can get confusing.

I'm going to run my 0.020 base gasket for a very safe clearance, I know the squish is going to be large/loose, and compression is going to be cut by a couple points, but it will be safe. I'm almost broke from this build and I want it to last.

[trippivot]

balancing act

balancing the major recriprocating parts reduces vibration and is worth the time and effort to get them within 1 gram of each other.

grams turn into pounds at 10K R.P.M. and that can wear out bearings , break cranks, distorts the cases . . etc... you see where this is going.

benefits to a completely stock engine are possible to feel ! if balance is out by 3g on 1 cylinder it may have been assembled and sent on down the production liine. Really, do you think they did this very fine performance detail while mass producing them? tolerance variances can stack up in the wrong direction of true balance. hence "good engines and bad ones of the exact same make and model"

,,





0.4 gram difference WOW CP Pistons are super high quality


I've had weisco difference in multiple gram differences 1 to another same same.


just finished all perfect at 322.8 bada bing! ready to clean and assemble


btw cool cats! I like 'em

every dog has his day, but nights belong to us big cats.

[trippivot]

getting closer,

, ,

[trippivot]

105- 108

,,

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88ci* 95 c.f.m. head @ 0.400" web 168 grind. redline at or before 9K 5 speed, 1-2-3 auto 680# package.

you tell me what am I forgetting . I'd like to go 8:90... 15/46 - 630 chain. 9X26 X 15 tire.

do you like what I'm doing?

[7981GS]

,

Copper gaskets, copper-coating on gaskets or both?

Daniel

[trippivot]

not everyone does copper gaskets the same.

I do them like this;
clean the gaskets after disassembly .
use a propane torch and anneal the copper
I spray both sides with permatex copper sealer spray and let dry.

I assemble head - base with out any other "glue"

,,

[davel]

Looks great! Are you planning to o-ring the block/head? What grit finish do you have on the block and head surfaces?

Thanks

[davel]

the KZ deck clearances are identical as a GS. remember to bolt the cylinder down hand tight when measuring .

do you mean 035 total piston to head? or 035 over and above everything together?

0.035" is too tight if that is a total "static" piston to head clearance measurement.

However if everything added together like the .015deck/.020base/.043head/= .078total -.040sling out =.032 super safe and fine.

if I have understood your question wrong I'm sorry PM or call me if you like 563 940 3734. Tech math can get confusing.

I'm going to run my 0.020 base gasket for a very safe clearance, I know the squish is going to be large/loose, and compression is going to be cut by a couple points, but it will be safe. I'm almost broke from this build and I want it to last.

Thanks for the info (I just saw this now. Not sure why i didn't get the email notice) btw, yes. I was initially thinking about running 0.035 total clearance - piston to head. Seems like it's very risky from what I'm hearing here...Also, I'm planning to run a copper head gasket for better heat dissipation but don't want it to leak. That seems like another area of debate...