Sweetness lives and explains what i said in the other thread a hell of alot better.
Thanks.

What is wrong with 9:1 is that you will loose power from lowering the compression. The m45 will not put out enough boost to warrent the need for lower compression pistons. The only advantage is they are what wiseco stocks. Any other compression ratio will be a custom order and likly take a 6 weeks to get. But if you are building it just wait 6 weeks and get what you really want in there.

I agree with sweetness 110% on what he said.



FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!

I have my 9.5:1 pistons for sale so I can get a set of 10:1's

My 9.5:1 where originally for a turbo build, but now that I have a SC I am changing them



Jason
99 Z24 Supercharged
157hp/171tq - NA
LD9 for Life

if you want a good starting point for boost look up http://www.importperformanceparts.net/ they have a kit for $999 that includes......
Complete Gasket Set
Performance Copper Head Gasket
ROSS/Wiseco Forged Pistons
(90, 90.5, 91mm bore)
(9.5-1, 10.5-1 comp ratio)
Performance Moly Rings
Performance Wrist Pins - Ultra Lite 79 grams
(stock pins weight 112 grams)
Federal Mogul Main Bearings
Federal Mogul Rod Bearings
Balance Shaft Bearings
Timing Chain
Lifters

and gives you an option to also get
Eagle Connecting rods=$315
TOGA HP Intake & Exhaust Valves=$12.99

So for a pretty damn good motor you should look there. You could also do it the old fashion way and buy everything seperate but I see this as something with potential

"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen

AJ B wrote:if you want a good starting point for boost look up http://www.importperformanceparts.net/ they have a kit for $999 that includes......
Complete Gasket Set
Performance Copper Head Gasket
ROSS/Wiseco Forged Pistons
(90, 90.5, 91mm bore)
(9.5-1, 10.5-1 comp ratio)
Performance Moly Rings
Performance Wrist Pins - Ultra Lite 79 grams
(stock pins weight 112 grams)
Federal Mogul Main Bearings
Federal Mogul Rod Bearings
Balance Shaft Bearings
Timing Chain
Lifters

and gives you an option to also get
Eagle Connecting rods=$315
TOGA HP Intake & Exhaust Valves=$12.99

So for a pretty damn good motor you should look there. You could also do it the old fashion way and buy everything seperate but I see this as something with potential

Sounds real good.... but it says that kit is only for "Chevy Cavalier 2.4L 1996-00" and they dont have a kit for the 01-02 2.4L.... should i still be able to use this on my 02? i would think so... but i dont trust my opinion. they have just about everything else for the 01-02... just not this kit... so i wonder if there is a reason for it.


my poor baby is sick... someone help me...
(2.4L engine in my cavy is ticking bad... need to make it stop)

people generally dont trust their opinion when they are not to sure but once you do things to a vehicle, sometimes you will never go back. this kit will work on your 2002(as long as done right). And you will have quite a bit of getty-up-and-go. and a pretty darn strong motor. I have a 1999 Z24 with the 2.4 and no problems thus far

"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen

ok... but what about compression? i only have the choice on 9.5:1 or 10.5:1 with this kit... i have 9.7:1 now... most people suggest 10:1 that isnt an option here... so do i DROP compression and go 9.5:1..... or go up to 10.5:1....

or do i just scrap this kit and find something with 10:1 and pay a lil more.


my poor baby is sick... someone help me...
(2.4L engine in my cavy is ticking bad... need to make it stop)

I would buy all the stuff seperate. That realy does not sound like it would be any cheaper. By the way when you buy pistons from wiseco you get the rings and wrist pins as well.



FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!

You can raise the CR a little by having the cylinder head shaved and using a Cometic NA headgasket. The Cometic headgasket is thinner than a stock felpro headgasket.



Jason
99 Z24 Supercharged
157hp/171tq - NA
LD9 for Life

So wade i take it your not a fan of the kit?

"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen

is it true that the older (96-99) Z24's had smaller combustion chambers in the head? If so does anyone know how much smaller or what kind of CR change this would make? I know they had the 9.5:1 pistons... but with higher compression heads, could this have ended up with the same combined compression as the 2002 engine with 9.7:1 and the larger chamber heads?

with this in mind.... and seeing as that "kit" is designed for the 96-00 (says nothing about 01-02) maybe they are giving you compression figures based on the stock head (smaller chamber) and that if you used it on a 2002 with larger chamber, you would be at a lower compression (maybe 10:1?)

Also.... what about head gaskets.... i know stock gaskets are the weak link in our engines under boost. but how are the aftermarket gaskets? the ones designed for this kinda stuff? and are you safer to go thicker or thinner on the gaskets?

i was just thinking i could tweak compression slightly with heads and gaskets... i could use a 02 head and thicker gaskets to drop compression (if i wanted to go with the 10.5:1 and bring it back to around 10:1)

Also, how much if any performance can be gained by boring the 2.4L out? I will have my engine bored anyway for the new pistons... so just thinking maybe i should go with a larger bore to gain some displacement. like how many liters can be gained by how much of an overbore? like will going 30-40 over give you much at all, we talking like 0.1 liter or what? and how much meat do these blocks have for safe boring?


my poor baby is sick... someone help me...
(2.4L engine in my cavy is ticking bad... need to make it stop)

I could be wrong but I think the combustion chamber volume in the all 2.4 heads are the same. I would not worry so much about running as close to a 10:1 compression as you would proably be fine with 10.5:1. Yes you could use a thiicker head gasket to lower it some How much lower I do not know. You are not going to gain much at all by boring the block .030 or.040 as oposed to .010 You would never feel the gain

Cometic and SCE make head gaskets but keep in mind the headgasket is only as good as the person installing it and head studs or bolts used.



FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!

ok... new bit of info here...

someone just pointed out to me that their Z24 had the same noise that mine did (the ticking noise) and they too assumed it was a bad wrist pin... and tore their engine out to fix it, only to find it was nothing but a bad crank bearing. He said that i should drop my oil pan, remove the rod caps and inspect my bearings before i go swapping engines and dumping $1000 into my bottom end.

Does anyone else agree with him? he says 3 hours to inspect bearings is well worth saving $1000 on replacing a whole bottom end.

the big arguement now is "rod bearings make more of a low pitched knock coming from bottom of engine, and wrist pins make more of a upper engine tick" This guy told me his engine sounded like a tick from the top... but everything was fine excpet for the rod bearings. and says sounds alone can be misleading.

some believe the rod bearings are a waste of my time... and some say "it is well worth a try"

so what do you think?


my poor baby is sick... someone help me...
(2.4L engine in my cavy is ticking bad... need to make it stop)

I think, what harm could it cause? if you trust the mechanic and he is good no reason not to take a look but then again if your goal is to rebuild and produce a better engine......in the long run you are going to need to get it done so simply put what are your goals? whats the budget? and how much you trust the mechanic? but by looking at other posts I know you have a supercharger, so does that mean you plan on keeping the car for a long time or was it just for fun?

"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen