Blew tops of pistons

**Sandman** · 04-29-2013

Your mod list looks good other than the ZZP PCM. Custom tune is best, if you can't do that then a DHP or Intense tune are the best canned tunes.

**Fivefingerdeathpunch** · 04-29-2013

Do you have a fuel pump rewire on that car?

If you don't its a good idea to get one.

**01GrandPrixTURBOGT** · 04-29-2013

No I don't I didn't know I needed one cause file pressure was good.

**Fivefingerdeathpunch** · 04-29-2013

Its after 8-10 seconds of WOT does FP drop off on most of our cars, the FP rewire fixes that issue.

**01GrandPrixTURBOGT** · 04-29-2013

Could you point me to a good forum?

**Sandman** · 04-30-2013

Originally Posted by 01GrandPrixTURBOGT

Could you point me to a good forum?

This one

**jlgp2007nc** · 04-30-2013

I'm thinking super lean as well. Did you put a lot of miles on the top swap? Over 200k is an old engine too. And only a 3.8 pulley? Why is everyone blowing up on 3.8? I'm trying to get to 3.6.

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**01GrandPrixTURBOGT** · 04-30-2013

Yea I was hoping for the best my new one has 85k and no I only got about 350 miles on the top swap. And I meant write up all I can find are ones of people asking about benefits not how to.

**jlgp2007nc** · 04-30-2013

[QUOTE=jlgp2007nc;1040535]I'm thinking super lean as well. Did you put a lot of miles on the top swap? Over 200k is an old engine too. And only a 3.8 pulley? Why is everyone blowing up on 3.8? I'm trying to get to 3.6.

I mean 3.5.

I'm just running mine rich. 10.7-11.0 in boost.

**01GrandPrixTURBOGT** · 04-30-2013

What mods do you have? I'm hoping I can find a tuner I don't wanna get another canned tune and this happen again.

**jlgp2007nc** · 04-30-2013

HP Tuners pro
4.0 pulley
1.8 rockers
Intense stock length pushrods oil restricted
Autolite 104
Blended inlet on gen v
Light port n polishon heads
Fenderwell intake
Speed daddy headers
Arp head studs
105 springs
L67 stock timing table
Commanded afr 11:1
20* timing wide open
knock free

**01GrandPrixTURBOGT** · 04-30-2013

I wish I knew how to tune.

**jlgp2007nc** · 04-30-2013

Hell I don't know how. LOL I'm still learning.

**Sandman** · 04-30-2013

Originally Posted by 01GrandPrixTURBOGT

I wish I knew how to tune.

Research, research, research followed by more research. I read about tuning for quite a while and had plenty of questions to ask.

**jlgp2007nc** · 04-30-2013

Same here. I researched and read, got parts together all for like a year and still seeing new stuff.

**GTPpower** · 04-30-2013

Really guys? Running lean because of a ZZP tune? Give me a break. All canned tunes run rich as hell. ALL OF THEM. The canned tune had nothing to do with the engine popping.

Pistons will usually chip due to detonation, or a lean condition. (Which your tune had nothing to do with) You more than likely have some mechanical issue. The first thing I would check is your fuel pressure.

**blueguy** · 04-30-2013

Originally Posted by GTPpower

All canned tunes run rich as hell. ALL OF THEM.

Lots of truth.

Originally Posted by GTPpower

The canned tune had nothing to do with the engine popping.

While I agree it is probably due to install error...

The canned PCM probably didn't help...as they are always just a band-aid until you get a real tune. If the OP thought you could get away with a canned PCM on a top swapped car, well...

then, lol.