SLOW SEDAN

iTrader: (13)

Just comparing to the old PT88 since it seems its a direct copy, but no maps for PT turbos either so no help there. Comparing my tugboat to his RX7 the On3 should have easily belted out the power to get him in the 8's if it can get mine to 9.5 so it has to be making a little power. I would love to compare the Bord to the On3 but going from T4 to T6 in a cramped spot is a bit of a pain since so much other stuff has to move.


Ya I havent seen anyone use the billet wheel On3 yet. I was going off the old non-billet numbers for comparison to what I have. The MVS looks better but they didn't increase the flow numbers, I guess they didn't want to impede sales on the $2500+ turbos in the same hp range?

a4ls2goat

Lol. 4 bent rods. Go figure

SLOW SEDAN

iTrader: (13)

Well at least they just danced and didn't go air conditioning your block!

a4ls2goat

Exactly what i thought

3 window

iTrader: (1)

Stuff those gen IVs in there and button it up! Oh, and we'll need video of a drive with the BW unit!.

69-chvl

iTrader: (11)

Any balance issues swapping in different pistons/rods or is the overall weights close enough?

a4ls2goat

Forsure!

3 window

iTrader: (1)

Be interesting to see the weight difference between a gen IV and a gen III piston and rod assembly. If you were swapping same generations, I wouldn't worry. I'd bet the later model assembly is heavier. Meaning the crank would be light on weight. May have some vibration issues at certain rpm points, maybe not.

a4ls2goat

7 bent rods

Black89Z51

iTrader: (2)

The picture might be messing with me with light and angles, but it looks like you bent 7. I don't think you tried hard enough. Next time I expect all 8 to be twisted mangled abominations.

In all seriousness though, good catch. Glad you don't have a new PCV system in your block.

RedRocketZ28

iTrader: (19)

Although my Gen III LQ4 doesn't make any abnormal noises, I am willing to bet I have some "S" rods. It's been in the car for going on 4 years and has been at 600+ rwhp the entire time.

I hope that I can catch mine in time too before it windows the block. Would like to keep the block around for a future forged bottom end.

Anxious to see some results of yours when you get it back together.

a4ls2goat

Lol. Im glad it was just that. Easy fix. This motor has 200k miles and the bearings look mint! Gota love ls motors

a4ls2goat

Yea i guess i was lucky and unlucky at the same time. Since it happend so fast i even kept timing really low to try to help it but that wasnt enough.

a4ls2goat

Thoughts on these pistons?


http://m.ebay.com/itm/5-3L-Chevrolet-GM-GEN-IV-V-Pistons-w-Rings-Flat-Top-w-Valve-Relief-New-Set-/231763825030?nav=SEARCH

Black89Z51

iTrader: (2)

I believe 5.3 pistons are dished. Those, however, will fit but may raise your compression ratio a bit. 4.8 pistons are flat. Honestly, if there's nothing wrong with your stock pistons, you may be able to clean them up and reuse them. Pressing the piston pin off the rod though may cause them to crack. May not be worth it to save $100.

Forcefed86

iTrader: (4)

None of the gen4 5.3 pistons are dished. I don't like the area above the ring land on the 2010+ pistons for boost. Especially where the valve reliefs are. Price seems crazy good though. Prob worth every bit of $100.

Here is the speedpro for comparison.

a4ls2goat

100$ compared to 250$.

Forcefed86

iTrader: (4)

Right and the speed pros don't come with rings either! Like I said prob worth every penny of $100. Just not ideal for boost is all.

a4ls2goat

as long as they hold the power i think its good

3 window

iTrader: (1)

If that's an accurate picture, very little above the ring land at the valve relief. I'd say any boost will wreak havoc on that area. Might want to reconsider. You'd want a piston with the ring package moved down if possible.