Re: Cracked Piston What Would You Do?
Updates? My vote is detonation unless the top of the piston edge's are melted. I cracked a few cast like that before going forged, then I broke everything else, :banghead: You are also burning a lot of oil, so have the guides check and install new seals.
Re: Cracked Piston What Would You Do?
I think it was detonation due to lack of fuel in 3 and 4. I threw in some TII rods and pistons. I’m making a few other changes too and hop to have the car on the road for spring.
Re: Cracked Piston What Would You Do?
Quote:
Originally Posted by
cordes
I think it was detonation due to lack of fuel in 3 and 4. I threw in some TII rods and pistons. I’m making a few other changes too and hop to have the car on the road for spring.
Cool beans.
Re: Cracked Piston What Would You Do?
We're getting close. A few changes indeed. A ported two piece and stock exhaust manifold are going on the car, with a ported SV and turbine housing. 58mm TB will be on there along with my own AN lines and new fuel injection section of the wiring harness. It shouldn't be too long now.
Re: Cracked Piston What Would You Do?
What about the fuel injectors?
Re: Cracked Piston What Would You Do?
dont forget to get a lip on that 58MM... after coming on and off a few times my 58mm started to blow the line off under boost.
Re: Cracked Piston What Would You Do?
Cordes I've been saying mine is 'getting close' for 6 weeks now, always some other delay:( At least I've made it to the templating/final mock up/gasket cutting stage. Getting close:lol:
I'm gonna start with my optimized 52mm TB but after all the 'new set up' bugs are worked out I want to do a B2B swap with a 58mm and no othe changes to see if there is an advantage. Problem is, I can't find one, I bought one off ebay that *looked* like a 58(guy musta had tiny little chic hands:lol:) but it was a 52. Nothing avail from rockauto, where are you guys sourcing them from?
Re: Cracked Piston What Would You Do?
98-2000 3.8 vans. 1 vacuum port throttle body. no extra bosses for extra ports.
no lip on the end. straight out AIS normally. that you need to change.
https://www.ebay.com/itm/98-99-00-CA...L/401343399152
Re: Cracked Piston What Would You Do?
Done, thx. I searched 3.8 throttle body a few times, that one never came up for me:confused2:
EDIT: Now can you find a gasket source:o I've bought 3 for the 3.8's, they've all been 52's...
Re: Cracked Piston What Would You Do?
Quote:
Originally Posted by
2.216VTurbo
Done, thx. I searched 3.8 throttle body a few times, that one never came up for me:confused2:
EDIT: Now can you find a gasket source:o I've bought 3 for the 3.8's, they've all been 52's...
Maybe this?
https://www.modernperformance.com/pr...ntake-manifold
or this?
https://www.modernperformance.com/pr...ntake-manifold
For that matter, has anyone tried one of those MPx 60 or 62mm TB's yet?
Re: Cracked Piston What Would You Do?
Quote:
Originally Posted by
OmniLuvr
What about the fuel injectors?
They look ancient, so I'm installing some good +40s that I had laying around
Quote:
Originally Posted by
masterjr33
dont forget to get a lip on that 58MM... after coming on and off a few times my 58mm started to blow the line off under boost.
How did you address that? I haven't put enough boost through one to blow off the IC pipe yet, but I know that day is coming.
Quote:
Originally Posted by
2.216VTurbo
Cordes I've been saying mine is 'getting close' for 6 weeks now, always some other delay:( At least I've made it to the templating/final mock up/gasket cutting stage. Getting close:lol:
I'm gonna start with my optimized 52mm TB but after all the 'new set up' bugs are worked out I want to do a B2B swap with a 58mm and no othe changes to see if there is an advantage. Problem is, I can't find one, I bought one off ebay that *looked* like a 58(guy musta had tiny little chic hands:lol:) but it was a 52. Nothing avail from rockauto, where are you guys sourcing them from?
I've got a pile of them from the JY.
Quote:
Originally Posted by
2.216VTurbo
Done, thx. I searched 3.8 throttle body a few times, that one never came up for me:confused2:
EDIT: Now can you find a gasket source:o I've bought 3 for the 3.8's, they've all been 52's...
If anyone finds the PN, I would appreciate it too. I've been cutting 52mm gaskets.
Re: Cracked Piston What Would You Do?
Quote:
They look ancient, so I'm installing some good +40s that I had laying around
phew! just wanted to make sure because you hadn't mentioned it in the post, these stock injectors are 30 years old now!
Re: Cracked Piston What Would You Do?
Quote:
Originally Posted by
OmniLuvr
What about the fuel injectors?
Quote:
Originally Posted by
masterjr33
dont forget to get a lip on that 58MM... after coming on and off a few times my 58mm started to blow the line off under boost.
Quote:
Originally Posted by
2.216VTurbo
Cordes I've been saying mine is 'getting close' for 6 weeks now, always some other delay:( At least I've made it to the templating/final mock up/gasket cutting stage. Getting close:lol:
I'm gonna start with my optimized 52mm TB but after all the 'new set up' bugs are worked out I want to do a B2B swap with a 58mm and no othe changes to see if there is an advantage. Problem is, I can't find one, I bought one off ebay that *looked* like a 58(guy musta had tiny little chic hands:lol:) but it was a 52. Nothing avail from rockauto, where are you guys sourcing them from?
Quote:
Originally Posted by
2.216VTurbo
Done, thx. I searched 3.8 throttle body a few times, that one never came up for me:confused2:
EDIT: Now can you find a gasket source:o I've bought 3 for the 3.8's, they've all been 52's...
Quote:
Originally Posted by
OmniLuvr
phew! just wanted to make sure because you hadn't mentioned it in the post, these stock injectors are 30 years old now!
I haven't been reusing them in my builds for about 15 years now. Anything that's seen enough boost to necessitate a 3 bar map has automatically gotten larger injectors.
Re: Cracked Piston What Would You Do?
I fired the car up today and it ran well. I need to adjust the shifter cables because it won't go into reverse now. Other than that everything is looking really good. There isn't any smoke coming out the pipe and I don't see any leaks. Hopefully the car responds well to all the mods and the engine holds together for a while. Joy just likes to drive it, so I think a strong TII setup will suit her well.
Thanks to all of those who have contributed to the thread. It was a huge help while I was doing this, especially since I haven't swapped pistons and rods like this in an engine before.
Re: Cracked Piston What Would You Do?
Final update on this. I got back today after putting over 800mi on the rebuild at SDAC. Some slightly spirited driving, but nothing crazy and the boost was only set at 7PSI. I'm 99% sure it was a failed LM which caused 3&4 to lean out and kill a piston. Regardless, I think the car will be good to go for a while. With how much Joy drives the car, it could last for many years. Thanks to all who helped with this process. I really appreciate all of the advice and feedback.