I think I blew my turbo!

[Baja Resident]

Just when everything is running great and I am turning towards upgrading the cosmetics things took a turn for the worse.

I was driving to grab a bite to eat tonight and got into a race with a Crossfire (1st kill by the way, if it those even count). Everything was well, then on an open stretch I decided to open it up a bit to triple check for any signs of knock. It boosted fine up to around 80 and I coasted a bit, then I hit the boost again and it spooled up and accelerated to 100, then suddenly "FOOOOSSSHH" and it lost boost. This is usually what happens when a pipe comes loose so I figure no big deal. I rolled down the window just to listen if anything sounded wrong. I gave it gas and it wouldn't spool at all, it made a rattle noise a little bit instead so I knew it wasn't a pipe this time. When I pulled it into the garage it smelled a little burnt. After the engine cooled off I took off the orange hose and sure enough the fan was stuck scraped to the side of the rim, the nut on it was finger loose, and the shaft would wobble side to side. I unstuck the blades, then got a ratchet and tightened the nut. It spun freely after that, but the shaft still would wobble slightly (maybe 1/8th inch any direction). I was feeling hopeful so started the engine, but to no avail. After a slight "SHIIINK" noise it drove with -5 max boost so I knew it was frozen again. On the bright side it drives wonderful for a 4.3 nonturbo.

Short version:

- killed Crossfire
- lost boost at 100mph
- engine made rattle
- turbo shaft loose, fan stuck
- do I need new turbo?


TIA

 

[SeattleSy#1255]

ya sounds like turbo is toast...couldn't ask for a better reason for the "non cosmetic upgrades" you were thinking of. :wink:

 

[Baja Resident]

So where do you shop for a new 20g turbo? Is it better to have this one rebuilt?

 

[Tydriver]

Based on yer mods listed in your signature.. I wouldn't p!ss around with a stock turbo or even a 20g.

Go for a GT61 turbo. Should have good spool and alot better top end than you have now. I had a 52 that bit the bullet when my motor went south, sent it back to PTE and had parts replaced and upgraded to the GT61 and sold the kit. For a little more than the 20g's are available for it's wise to acquire a PTE kit and move on to a new technology turbo.. just my :2cents:

 

[Baja Resident]

Will it bolt on the same? I was more concerned with being able to slap on another without having to replace anything else. I am running dry on funds here.

It has a Delta external wastegate and 3000 stall so it should be able to run a better turbo as you said, but I need to make sure it bolts on without having to replace exhaust, etc, etc..

 

[timgt]

Get a new turbo, that turbo has already been rebuilt once to my knowledge by the owner right before you. That small turbo is holding that truck down anyway. That truck should be MUCH FASTER then it is. I only ran a 12.6 in that truck and she should go 11's all day long with those mods. Get a new/slightly larger turbo.

 

[Tydriver]

PTE kit is for the most part, a straight bolt in affair. It's supposed to bolt to the stock exhaust and has far better boost control than any 20g or stock turbo ever thought about..

With turbos almost doubling the CFM flow if the stock turbo, its pointless to go 20g or stock turbo anymore IMO, unless ya find one at a garage sale for cheap cheap cheap.

 

[nightdiver]

Mods: Engine rebuilt at ~50k
Accel Gen 6 DFI
Bored .30 Over
Forged Pistons and Rods
1.6 Roller Rockers
Brodix Aluminum Heads
50# Injectors
20G Turbo
KB Cold Air Kit
KB Air/Air Intercooler
KB Auxillary Fuel Pump
KB AFPR
KB Headers
Catalytic Converter Removed
3" Exhaust

:rock:




Jesus Man...your engine begs for at least a T63 or T66

 

[Tydriver]

Jesus Man...your engine begs for at least a T63 or T66

I was thinking same thing, but more like a GT67 (or thereabouts)..

But then again I see the KB headers.. Not 100% sure that the headers will match upto a PTE setup......