So the Z finally runs. I had thought I somehow cracked the flex plate after the swap due to a loud terrible noise from the bell housing. Well after months of not driving the car I finally found time to tear it apart. Go figure all that down time and it was the torque converter bolts not torqued properly. For the time being it will run with stock cams but is still considerably faster than stock. I hope to run it at the track before I switch cams and do some intake customization
to see what it runs with just the head, exhaust, and hp tuners. Thanks Brian for suggesting I check those bolts.
AWESOME!
looking forward to times and dyno numbers!
I will definitely try for some track times, however as far as the dyno im going to wait until I upgrade cams.
If you can get a good deal on a dyno I'd say go for it.
Everything with that head is basically larger, so it would be interesting to see the difference with JUST the head swap.
-M
Remember....syringes go in the RED waste basket.
Thats true Id like too see the numbers.
mastin's right, man. any proof made that this head truly would help us ld9 boys would be a godsend.
personally, ive wanted to do the swap for years but have always been a little leary because of the over heating issues and what not. so for this head to work on your car without issue and to see that it truly does make a difference would most definitely sway me.
Ill have to seriously consider the dyno. It would be nice to prove the head is a good upgrade. The car does run a little hotter but I think the water pump is dying. Its also not my daily driver so I was all for the swap.
Mastin wrote:If you can get a good deal on a dyno I'd say go for it.
Everything with that head is basically larger, so it would be interesting to see the difference with JUST the head swap.
-M
.. I don’t know if "basically" would be the word for it...
... where’s the thermostat? Is it where it belongs for a LG0\LD2 head?
And I hope you burped the cooling system correctly….
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
10 BUCKS says his Tstat is in the wrong location
LOL i know right!
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
so, what...?? does it go in the aluminum water neck that bolts to the head?
yes....put you a 180* Tstat in the water neck on the head...AND DONT FORGET THE GASKET....throw out the one by the water pump....or pull the guts out of it either one...just make sure you keep a good seal there
..160* ..... wont use anything but on my 086 head.
its a real Quad 4 head, so you should use a Quad-4 housing.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Quote:
.160* ..... wont use anything but on my 086 head.
eh..possibly....i use 180..i like to keep it as close to operating temp as possible...but i use the griffin radiator and 3000cfm fan...so it really doesnt get much higher than 180-190
not not all THAT familiar with the HO's so do they have the same type of hard line that comes out of the housing and behind the engine then into the coolant res.?
if not, how do you use the ld9's on the housing?
scott (section8cav) wrote:Quote:
.160* ..... wont use anything but on my 086 head.
eh..possibly....i use 180..i like to keep it as close to operating temp as possible...but i use the griffin radiator and 3000cfm fan...so it really doesnt get much higher than 180-190
Just change your Proms fan on\off temps.... mine never gets hotter then 175....
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
I used the proper housing for the quad head but did not put a thermostat there, I left the ld9 one in. I dont see where it makes a difference as long as it has one or the other. What are the benefits of using the quad one instead?
Believe me, man. If you compare the sizes of the 2.3 and 2.4 tstats, you will see where the difference is. Also the diameter of the pipes where they both sit are different (2.3 being in the water outlet which is larger.) I just took my 2.4 tstat out, dremeled away the guts, and left the outer ring for a proper seal and know my hybrid operates a little cooler than stock. Somewhere around 175-180*. How did you handle all the lines into the water neck. Ran into problems with the different hose to fitting sizes. And as for cams, the secret cams make a huge difference with this head. Thing effin screams after 4k! Got some HO's i've been pondering on using but since got a set of W41's w/ a hotter grind.
Kinda leary on using those, though. Good job on the swap, man.
scott (section8cav) wrote:yes....put you a 180* Tstat in the water neck on the head...AND DONT FORGET THE GASKET....throw out the one by the water pump....or pull the guts out of it either one...just make sure you keep a good seal there
Alot of the guys on Quad4 forums keep the LD9 thermo by the water pump. There saying that with the thermo in the head is what causes the head to crack because it gets thermal shock. The water pump keeps a continuous circulation of water running by the LD9's thermo and open just enough to let the cold water running by it to close it then the water runs through the block and up to the head by which time its already within range of the coolant thats already there and the cycle continues. Thats why on a LD9 you dont see the drastic temperature sways like you would with the thermo in the head. When you put the thermo in the head it doesn't close until the cold coolant hits the thermo which has by that time dropped the temp of the block and the head instead of just spitting enough coolant in the system to remove the added heat to keep it at a consistent temp.
The guys over there say its the best thing for the 086 head and they've also seen alot longer life out of the head(not cracking) and head gasket aswell since the head and the block don't expand/contract at the same rate when you heat it up/cool it off. Anyway, just thought I'd throw it out there.
EDIT: I'm just finishing modifying my water pump housing to use a standard SBC/Q4 thermo and going to run a 170*
Edited 1 time(s). Last edited Sunday, August 10, 2008 11:28 AM
No, the fact that Fan on doesn't occur until 235, and the 2.3 style flow to well, drops temps to fast, this creating a crack in the head from heat lose to fast.
Re-programing the Eprom Elevates this.
Standard LD2\LG0 thermostat is 180-195 depending on the year.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
I dunno....go check over there and theres alot of guys that HAVE cracked heads before that have not since they changed the location of the thermostat. Take it or leave it. I'm gonna take it.
Edited 1 time(s). Last edited Sunday, August 10, 2008 4:51 PM
Quote:
theres alot of guys that HAVE cracked heads before that have not since they changed the location
well on THAT note......i know guys that have cracked heads with the Tstat under the water pump...personally i have ran 3 different quad engines and all have had the stat on the head....i even have it on the head of my 2.6stroker...havnt cracked a head yet and MY engine doesnt get hot....You are the one that said you were having cooling issues with the stat in the other location............................but who am i and what do i know
scott (section8cav) wrote:Quote:
theres alot of guys that HAVE cracked heads before that have not since they changed the location
well on THAT note......i know guys that have cracked heads with the Tstat under the water pump...personally i have ran 3 different quad engines and all have had the stat on the head....i even have it on the head of my 2.6stroker...havnt cracked a head yet and MY engine doesnt get hot....You are the one that said you were having cooling issues with the stat in the other location............................but who am i and what do i know
I never said I had any cooling issues.....wheres that coming from?
But interesting to know.........I just dont like the temp swings when the thermo is placed in the head. Theres going to be head gasket wear that just isn't needed.
Quote:
I never said I had any cooling issues.....wheres that coming from?
i apologize ..... i confused you with the original poster hehe my bad
