Help me rebuild ......... what to buy ... what to re-use... etc. - Page 19 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

PQ · 01-25-2014, 03:18 PM

Quote:

Originally Posted by zebra

i thought with lower compression, boost means less & you need more of it to make the same power... you just have more resistance to detonation because you ain't trying to squeeze X amount of air as much

and my bone stock 55kmi LS1 handles more than 10psi just fine. i can't imagine why a 'properly built/forged' iron block engine is only warrantied up to 8

Agreed on the built/forged iron block.

I thought with a lower CR at the same boost it would be compressed with more volume for a bigger explosion to push harder and more effeciently.

Quote:

Originally Posted by MountainMan1Le

Well it will still easily put down a respectable 650HP to the ground (mildly blown) that's nothing to sneeze at and would make most people happy and the price is right.

For which engine?

Quote:

Originally Posted by zebra

off topic, but i just flew by Bangor a couple weeks ago - got some gas from your tanker unit.

and i wasn't doubting the power - just why they rated it so low because it should safely handle plenty more than 8psi with low compression... that's all

Hope you enjoyed the fuel. You should have gave me a fly by. lol

zebra · 01-25-2014, 08:27 PM

somebody smart correct me if i'm wrong, but the way i understand compression is that the cylinder still moves the same volume of air at 11:1 as it does at 9:1 (because the crank & rod length is still the same) - it's just that the higher compression squeezes said volume into a smaller space, which creates more heat & explosive force, resulting in a higher potential for knock but yielding more power.

as for the flyby, i was supposed to go pretty close to my house but we got vectored direct from WV to TX, so we never went that far south. i hear we might be going down to Eglin soon... there's a little potential for ya there

PQ · 01-25-2014, 11:53 PM

Quote:

Originally Posted by zebra

somebody smart correct me if i'm wrong, but the way i understand compression is that the cylinder still moves the same volume of air at 11:1 as it does at 9:1 (because the crank & rod length is still the same) - it's just that the higher compression squeezes said volume into a smaller space, which creates more heat & explosive force, resulting in a higher potential for knock but yielding more power.

Well I'm not smart, lol, but I figure the same. So the naturally aspirated 9:1 would be considerably less power than the NA 11:1 because the compression would be, say, only 170 pounds for the 9:1 instead of 220 pounds for the 11:1. (to use an example AND assuming the same displacement)

Boosting that 9:1 to make 220 pounds at compression to match the 11:1s 220 pounds of compression would make more power because the 220 pounds of pressure in the 9:1 would be with more volume in the compressed/clearance area.

I just assumed that was the way it worked. I was never told that just kind of made a guess.

Now I'm curious.

zebra · 01-26-2014, 01:56 PM

same here...

PQ · 02-25-2014, 10:44 PM

Dropped off engine block and heads to machine shop this morning.

litle88 · 02-26-2014, 05:28 AM

Quote:

Originally Posted by PQ

Dropped off engine block and heads to machine shop this morning.

Nice!!!!
Good news PQ!

1Camaro2SS · 03-02-2014, 03:56 PM

Sweet. Can't wait to see that engine back in the garage and in the car PQ.

PQ · 03-10-2014, 03:59 PM

Ordered.

Black is about done, bored minimally to get a good clean hone so no real displacement change there but the pistons will be shorter for 10.2:1 compression and a bit of volume be default there. Not much I imagine. Pistons and rods forged of course. Re-using my crank.

Heads are getting CCd and cleaned up. Not going to port them but going to knock off the sharp edges that can get hot.

Cam and specs to come.

1860.70 so far.

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csjcsj · 03-10-2014, 06:00 PM

Good deal! You need to get it back on the road!

PQ · 03-11-2014, 01:36 AM

Agreed. In the end I'll pretty much not be goinv real special like I wanted. Essentially lower compression and forged internals is the only difference. Can run more boost but I'll leave it safe. Expecting 600 whp with 9 to 10 psi. Can run more but I am in no position to push too hard.

CWI · 03-11-2014, 02:23 PM

Quote:

Originally Posted by PQ

Ordered.

Black is about done, bored minimally to get a good clean hone so no real displacement change there but the pistons will be shorter for 10.2:1 compression and a bit of volume be default there. Not much I imagine. Pistons and rods forged of course. Re-using my crank.

Heads are getting CCd and cleaned up. Not going to port them but going to knock off the sharp edges that can get hot.

Cam and specs to come.

1860.70 so far.

Attachment 606840

Looking good Randy. I didn't read the entire thread but saw the pictures. What caused the failure to start with? Where the metal come from?

I have the heads off mine and the cam out. #4 exhaust lifter looks like yours did. Cam as well on that lobe. Collateral damage from the rocker arm failure Nov '13. 20K miles later some of the material that must have been in the lifter bucket made it's way to the cam. Sad part is I am working in Anacortes, WA till first week of April and my car is in my shop in Oregon waiting for me to do some torqueing. Moving up to G6X3 cam using LS7 lifters and LS9 head gaskets. Just in case I get around to adding a Whipple.

Bo White · 03-11-2014, 02:31 PM

Glad to see progress! That's all I'm going to do to mine when the time comes, good rods and pistons and call it a day.

PQ · 03-11-2014, 03:22 PM

Quote:

Originally Posted by CWI

Looking good Randy. I didn't read the entire thread but saw the pictures. What caused the failure to start with? Where the metal come from?

I have the heads off mine and the cam out. #4 exhaust lifter looks like yours did. Cam as well on that lobe. Collateral damage from the rocker arm failure Nov '13. 20K miles later some of the material that must have been in the lifter bucket made it's way to the cam. Sad part is I am working in Anacortes, WA till first week of April and my car is in my shop in Oregon waiting for me to do some torqueing. Moving up to G6X3 cam using LS7 lifters and LS9 head gaskets. Just in case I get around to adding a Whipple.

I can not definitively say what the root cause was. There was not a lot of other damage visible on the cam and lifters. The pressure relief plunger was perfect in appearance with no scratches or scars so I don't think that got stuck open.

Valve float maybe. Bad cam maybe. Hard to say.

Quote:

Originally Posted by Bo White

Glad to see progress! That's all I'm going to do to mine when the time comes, good rods and pistons and call it a day.

Well it will be nice to have it done even if it's just forging the internals. I'll have the added volume from stroking it plus the cooler burn from the lower CR to be safer yet.

FiveO · 11-23-2014, 05:27 PM

Hey PQ, what was your final end result? Been following your thread.......very interesting cause I've been considering going with a 416 with my Vortech V3 blower. Now I'm wondering if my centri blower will have the same problems as the Maggie on a 416 cubic inch motor????! Geez

01-25-2014, 08:27 PM	#254
zebra just can't seem to leave Drives: your mom wild!! Join Date: Oct 2008 Location: cold & windy Posts: 10,625 View My Garage	somebody smart correct me if i'm wrong, but the way i understand compression is that the cylinder still moves the same volume of air at 11:1 as it does at 9:1 (because the crank & rod length is still the same) - it's just that the higher compression squeezes said volume into a smaller space, which creates more heat & explosive force, resulting in a higher potential for knock but yielding more power. as for the flyby, i was supposed to go pretty close to my house but we got vectored direct from WV to TX, so we never went that far south. i hear we might be going down to Eglin soon... there's a little potential for ya there __________________ Eve ('00 FRC): hot-air intake Rowan ('09 H3): 5spd mom-mobile Penny ('99 Sierra): 5.3 / HD 5spd... gone but not forgotten Samson ('18 HD): compounded 408

01-26-2014, 01:56 PM	#256
zebra just can't seem to leave Drives: your mom wild!! Join Date: Oct 2008 Location: cold & windy Posts: 10,625 View My Garage	same here... __________________ Eve ('00 FRC): hot-air intake Rowan ('09 H3): 5spd mom-mobile Penny ('99 Sierra): 5.3 / HD 5spd... gone but not forgotten Samson ('18 HD): compounded 408

02-25-2014, 10:44 PM	#257
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	Dropped off engine block and heads to machine shop this morning. __________________

03-02-2014, 03:56 PM	#259
1Camaro2SS Drives: 2010 2SS/RS L99 Join Date: Sep 2010 Location: Grand Rapids, MI Posts: 1,430 View My Garage	Sweet. Can't wait to see that engine back in the garage and in the car PQ. __________________ 432 RWHP 391 RWTQ 12.37 1/4 mile on stock tires

03-10-2014, 03:59 PM	#260
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	Ordered. Black is about done, bored minimally to get a good clean hone so no real displacement change there but the pistons will be shorter for 10.2:1 compression and a bit of volume be default there. Not much I imagine. Pistons and rods forged of course. Re-using my crank. Heads are getting CCd and cleaned up. Not going to port them but going to knock off the sharp edges that can get hot. Cam and specs to come. 1860.70 so far. __________________

03-10-2014, 06:00 PM	#261
csjcsj Drives: 2010 Camaro SS/RS 6spd Join Date: Sep 2009 Location: Jefferson, Ga Posts: 4,399 View My Garage	Good deal! You need to get it back on the road! __________________

03-11-2014, 01:36 AM	#262
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	Agreed. In the end I'll pretty much not be goinv real special like I wanted. Essentially lower compression and forged internals is the only difference. Can run more boost but I'll leave it safe. Expecting 600 whp with 9 to 10 psi. Can run more but I am in no position to push too hard. __________________

03-11-2014, 02:31 PM	#264
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Glad to see progress! That's all I'm going to do to mine when the time comes, good rods and pistons and call it a day. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

11-23-2014, 05:27 PM	#266
FiveO Drives: 2011 Camaro SS 6speed Manual Join Date: Sep 2010 Location: Baton Rouge, LA Posts: 128 View My Garage	Hey PQ, what was your final end result? Been following your thread.......very interesting cause I've been considering going with a 416 with my Vortech V3 blower. Now I'm wondering if my centri blower will have the same problems as the Maggie on a 416 cubic inch motor????! Geez __________________ New Orleans Saints, "America's Team"