LSfan70s

I've got a LQ9 for my 68 Firebird. Not installed yet. My dream has always been to include a turbo in the game, but for a what I know (or ignore) I must change many of the guts of my LQ9 to handle the power and not brake it, and my budget won´t let me do that. But on the april hot rod mag page 72, there' a guy who installed a turbo on his 5.3L with all the engine internals stock.
If I do that:
How big will be reduced the life of the engine?
How big (or small) should the turbo be to get some more power without risking the life of the engine?


Thanks in advance.

NemeSS

iTrader: (127)

t76 will be fine for the lq9
5-10 psi with fmic or meth
500-600hp will not hurt the motor with enuff injector and proper tune

LSfan70s

Thanks NemeSS

Sorry again for my ignorance, what is fmic or meth? Gas type?

gogogadgetcar

fmic = front mount intercooler
meth = alcohol injection

deadmanTA

iTrader: (7)

That's what I was going to do to my 76 formula, but ended up selling it and building my 99 instead. I would stay at 8-9 psi to be safe. My internals are stock for now also. Alot of it is in the tune!

geeteego

iTrader: (1)

Couple things...

I have an LQ9 in my Goat. It's turbocharged.

On stock internals, what I would recommend is this:

1. Find out where you are mounting the turbo (front or rear)
2. What fuel system and engine management are you using?
3. You'll need to upgrade lifters, valvesprings, and pushrods in the very least
4. Remember, boost is a restriction value, 7-8 psi on a 76mm compressor is a LOT MORE than 7-8psi on a 60mm compressor.
5. 91-93 octane fuel will be an absolute minimum
6. Stock LS1's are running safely tuned to about 550rwhp on average for 6-speeds I use this as comparative for stock internals
7. It's not cheap at all, no matter how you slice it
8. You want to match the efficiency range of the turbo to the output of the motor
9. Good luck!

LSfan70s

Thank you very much for the good info guys!
I really appreciate it!
I have taken the decision of going turbo. By now I’m finishing the body, once it’s done, I’ll post the pics on conversions and hybrids, I'll be asking for more specific help on how to do the turbo thing. The biggest problem I think is the higher octane gas. The only higher than premium here in CR is av gas. I’ll figure it out.
Now I’m moving to the wheels and suspension sections of LS1tech.

If you think there's something else I should be aware by doing the turbo stock LQ9, please let me know.

Thanks!

... oh! One last thing, I want a belt driven compressor.

CalSpeedPerformance

iTrader: (64)

I think youd save alot of time doing alot of searching and reading....youll answer your questions and understand why through some time there..

tirefryin_s10

iTrader: (3)

While alot of this I agree with the one thing i REALLY dont agree with is the need of upgrading lifters .... unless the motor is some high miler etc the stock lifters have been run in some VERY seriour builds. my stock 5.3 with 76mm turbo is working pretty good to the tune of 550 ish rwhp on pump gas and 12 psi with a FMIC and no meth.

Chadder

iTrader: (2)

Wait. So you want to run a supercharger?

geeteego

iTrader: (1)

The only reason I mentioned lifters is due to some oiling issues encountered on boosted LS2/LQ9 cars, and I've seen some bad lifters (3 sets, to be exact).

I just like to be safe over sorry. I've been sorry, and it hurt my wallet.

tirefryin_s10

iTrader: (3)

Fair enough just adds a whole bunch more cost to the build ....

Lifters
Head gaskets
Head Bolts
Front cover gasket
Water pump gaskets
Balncer bolt
Etc

1bad2k

iTrader: (10)

lol thats what i want thinking. sounds like he wants a centrifugal supercharger.