2.3l turbo questions

Topic: 2.3l turbo questions (Read 1330 times) previous topic - next topic

2.3l turbo questions

June 11, 2007, 10:19:20 PM

which motor has the flat pistons from factory. and i am building a motor for my tc its 60 over with speed pro flat tops how much power will it add i have a t-3 a/r 60 a/r 63 for now?

2.3l turbo questions

Reply #1 – June 11, 2007, 10:23:13 PM

Flat tops are a BAD idea in a 2.3, especially considering Speed Pro doesn't make forged ones for the 2.3! PM me.

hey

Reply #2 – June 11, 2007, 10:30:38 PM

Quote from: Aerobird Motorsports;153612

Flat tops are a BAD idea in a 2.3, especially considering Speed Pro doesn't make forged ones for the 2.3! PM me.

can u give me a call or is there a number where i can call 513 276 0676

2.3l turbo questions

Reply #3 – June 11, 2007, 10:31:17 PM

Quote from: mikesparks;153608

which motor has the flat pistons from factory. and i am building a motor for my tc its 60 over with speed pro flat tops how much power will it add i have a t-3 a/r 60 a/r 63 for now?

n/a versions of the 2.3 have flattops.

Remeber raising the compression raises octane demand resulting in less boost per fuel octane.

2.3l turbo questions

Reply #4 – June 11, 2007, 10:42:28 PM

a friends car had the flat tops in it and it felt fine on pump gas and the motor i just tore down had a set in them too the pistons i have i h435p i looked them up and they say that they were buick turbo pistons . they have the letter F stamped on them in two different spots

2.3l turbo questions

Reply #5 – June 11, 2007, 10:45:10 PM

Quote from: mikesparks;153625

a friends car had the flat tops in it and it felt fine on pump gas and the motor i just tore down had a set in them too the pistons i have i h435p i looked them up and they say that they were buick turbo pistons . they have the letter F stamped on them in two different spots

factory turbo buick pistons are cast just trying to save you a tuning headache 9:1 motors work alright but like i said the timing curve and fuel will need to be compensated when you are at stock or above boost levels.

H435p Piston Hypereutectic 3.7795 in. bore, 2-2.0mm, 1-4.76mm rings, Flat Top

factory 2.3 bore is 3.7850

2.3l turbo questions

Reply #6 – June 11, 2007, 10:50:00 PM

Quote from: SLEEPER T-BIRD 87;153626

factory turbo buick pistons are cast just trying to save you a tuning headache 9:1 motors work alright but like i said the timing curve and fuel will need to be compensated when you are at stock or above boost levels.

i have 650cc inj. and a 255 fuel pump i want to race the car i am in the process of getting a 456 gear. im going from dsm to these so i dont know these cars 100% yet

2.3l turbo questions

Reply #7 – June 11, 2007, 10:50:30 PM

Flat tops are not a "bad" idea IF you have the ability to tune the engine.

Actually I beat the dog snot out of 9.0:1 compression engine (BV ported head, cam, no IC, 16-17# boost, 13-14* timing, no KS, gutted intake, PC-1 ECU) and never had a problem. The car ran like a scalded ape.

Now the .060" over bore IS a bad idea on a 2.3 block. If you have to go that far with it, find another.

2.3l turbo questions

Reply #8 – June 11, 2007, 10:51:47 PM

Quote from: SLEEPER T-BIRD 87;153626

factory turbo buick pistons are cast just trying to save you a tuning headache 9:1 motors work alright but like i said the timing curve and fuel will need to be compensated when you are at stock or above boost levels.

H435p Piston Hypereutectic 3.7795 in. bore, 2-2.0mm, 1-4.76mm rings, Flat Top

factory 2.3 bore is 3.7850

they say 60 over on the piston and the machine shop bored each cylinder to the pistons 1-4

2.3l turbo questions

Reply #9 – June 11, 2007, 10:53:27 PM

Quote from: Chuck W;153631

Flat tops are not a "bad" idea IF you have the ability to tune the engine.

Actually I beat the dog snot out of 9.0:1 compression engine (BV ported head, cam, no IC, 16-17# boost, 13-14* timing, no KS, gutted intake, PC-1 ECU) and never had a problem. The car ran like a scalded ape.

Now the .060" over bore IS a bad idea on a 2.3 block. If you have to go that far with it, find another.

i already had the pistons for the block . whats wrong with that bore

2.3l turbo questions

Reply #10 – June 11, 2007, 10:59:04 PM

That is too much bore for a motor you're planning on beating on.

Sorry, but you just wasted money.

2.3l turbo questions

Reply #11 – June 11, 2007, 11:26:42 PM

The max for these motors is about .040 and even them they need to be sonic-checked before and after.

So you're running a flat-top, hypereutectic piston at 3.8395 (a .545 overbore) for a Buick motor? It's not hard to get the correct pistons for these motors, so I'm at a loss as to why you would do that.

THIS is what happens to flat-top hypers in a turbo motor.

2.3l turbo questions

Reply #12 – June 19, 2007, 10:42:31 AM

Just curious..... why would you put boost to a plastic piston? it's bad enough when youre putting bost to a cast piston. Using hyperutectic pistons in a boosted application is just asking for rapid disassembly without the use of tools.. IMHO. Nice pics though.

2.3l turbo questions

Reply #13 – June 19, 2007, 11:07:44 AM

I didn't know what pistons the motor had :hick:

I bought the car used and the engine looked factory stock. It looks like a cheesy NAPA/Jasper/whatever rebuilt bottom end with for pistons and horrible machine work.