Rear mount gto build. :) LQx REBUILD TO COME
08-21-2010, 05:58 AM
#261
TECH Regular
I noticed that up top you mentioned 190kpa and 8 psi boost. 166kpa=10# your more like 14# of boost at 190kpa. If the MAP is correct. My 2 bar was off by 20-30 kpa and I had to rescale it in HPT. That's enough to break ring lands like you said but your should just check the comp out like you said before you worry. An LS2 has 170 psi stock and 130ish with a large chunk of ring land busted out of it..fyi.
I went with the -10cc Wisco dish and REGRET IT. With E-85 there just isn't a need for less than 11:1 CR even with 15# of boost. That **** can take it. At the track I run #15psi and 200 IAT with no intercooler and do not get KR unless I go lean.
The dish gives me less power, less MPG, and the only advantage is I could go >25 psi of boost but that'll never happen....
I went with the -10cc Wisco dish and REGRET IT. With E-85 there just isn't a need for less than 11:1 CR even with 15# of boost. That **** can take it. At the track I run #15psi and 200 IAT with no intercooler and do not get KR unless I go lean.
The dish gives me less power, less MPG, and the only advantage is I could go >25 psi of boost but that'll never happen....
08-21-2010, 11:39 AM
#262
Compression Test results 8 : 153-155 .................................................. ...7: 153-155
6 : 153-155 .................................................. ..... 5 : 70
4 : 155 .................................................. .............. 3 :153-155
2 :153-155.................................................. ........ 1 : 153-155
still has power, lol. But pisses smoke and oil everywhere. lol
so you tell me
6 : 153-155 .................................................. ..... 5 : 70
4 : 155 .................................................. .............. 3 :153-155
2 :153-155.................................................. ........ 1 : 153-155
still has power, lol. But pisses smoke and oil everywhere. lol
so you tell me
08-21-2010, 04:41 PM
#269
I do have a 6.0 shortblock on standby and am making calls to machine shops come monday. Low mileage engine looks good. Cross hatching is still very very visible,
Probably going to punch her out alittle. ive been set on a 370 with a larger turbo for awhile, so it looks like its happened sooner then intended, oh well
Probably going to punch her out alittle. ive been set on a 370 with a larger turbo for awhile, so it looks like its happened sooner then intended, oh well
08-21-2010, 05:08 PM
#271
you already have the 6.0? nice i must have missed it. if its the LQ4 it has the dished pistons and should do more than fine for a turbo build. just bearings, rod bolts, and head studs. hell you could put a nice set of steel top rings in it too.
My TC76 will look nice on that 370 and make some nice numbers! 850 shipped to ya bro
My TC76 will look nice on that 370 and make some nice numbers! 850 shipped to ya bro
08-22-2010, 11:05 AM
#272
TECH Regular
It really sucks ***** that the LS doesn't have reusable bolts. I reused all of them once but the second time they were just soft and spongy at about 50 ft/lbs tq and I didn't want to risk them. They are so freakin expensive. The bolts for the main caps alone were 200 damn dollars. Almost half the price of the rods for gods sake. Oh, the rods come with ARP 2000 or better so at least you don't have to buy those. And get the head studs, not the bolts. I got a used set of bolts cheap but I can feel the threads in the block on one of them giving up.
You absolutely MUST MUST MUST line hone the mains after changing the bolts. I didn't and lost a main after just 2 weeks. I didn't bore the cyls, 40,000 miles and that was a good call. It just didn't need it. My car was down for 2 weeks and the entire build and rnr took about 20 hours. 4.5 To take it out. 1 to tear down. 1 to put pistons n rods together. 1 to file fit the rings. 2 to put in block. . 3 to assemble long block and set in car. 6 to bolt everything down. and 1 to do fluids.
File fitting the rings is a PITA. Base your piston choice on whether you can get rings for them that fit the LS. With E-85 stay with the stock compression, 11:1 or so. I'm running the OEM timing table with #11 of boost on GAS with my -11cc dishes.
You absolutely MUST MUST MUST line hone the mains after changing the bolts. I didn't and lost a main after just 2 weeks. I didn't bore the cyls, 40,000 miles and that was a good call. It just didn't need it. My car was down for 2 weeks and the entire build and rnr took about 20 hours. 4.5 To take it out. 1 to tear down. 1 to put pistons n rods together. 1 to file fit the rings. 2 to put in block. . 3 to assemble long block and set in car. 6 to bolt everything down. and 1 to do fluids.
File fitting the rings is a PITA. Base your piston choice on whether you can get rings for them that fit the LS. With E-85 stay with the stock compression, 11:1 or so. I'm running the OEM timing table with #11 of boost on GAS with my -11cc dishes.
08-23-2010, 09:20 PM
#276
you already have the 6.0? nice i must have missed it. if its the LQ4 it has the dished pistons and should do more than fine for a turbo build. just bearings, rod bolts, and head studs. hell you could put a nice set of steel top rings in it too.
My TC76 will look nice on that 370 and make some nice numbers! 850 shipped to ya bro
My TC76 will look nice on that 370 and make some nice numbers! 850 shipped to ya bro
I like the combo becuase its proven and i can work towards a 9sec pass with the motor and turbo and build everything else around it.
we will see. one hurdle at a time. Motor, sell turbo and see how i come out.
hahaha 
08-24-2010, 12:06 PM
#279
that PT88 is a monster but alot of guys are having trouble with them. I was gonna do twin TC76s but i didnt really want to spend another 1200 bucks on a turbo. so i went with twin MPT70s. that TC76 is super compact and will make great power. when i get my MPT70 in tomorrow i will show comparison pics of that and my TC76. they are pretty much the same size but the TC will WAY out flow it.
08-24-2010, 12:10 PM
#280
i understand about the tc76, its actually the same physical size as my turbo. its a 76 trim wheel in a 60 series housing, IIRC.
It really all depends on how i come out after i sell my current turbo and build my motor.
It may be till tax time until i can buy another turbo. we will see.
It really all depends on how i come out after i sell my current turbo and build my motor.
It may be till tax time until i can buy another turbo. we will see.