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post #1 of 10 (permalink) Old 11-12-2006, 06:59 PM Thread Starter
 
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Max RPM Increase

What is the best way to increase the max RPM of my 97'Tbird 3.8L?

Looking to increase RPM to be able to run a twin turbo with great potential with high output at higher RPM's

What do i need to do to be able to run higher boost levels than 9psi.
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post #2 of 10 (permalink) Old 11-13-2006, 02:59 AM
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To increase the maximum RPM, or raise the rev limiter, you need to get a tune.

To run the boost that you want, you're gonna need a new engine. That 3.8 in your car isn't capable of handling that amount of boost. You WILL blow it up. If you want to run massive amounts of boost (i.e. more than 8 psi) you'll need forged internals.

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post #3 of 10 (permalink) Old 11-14-2006, 01:42 PM
 
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Perhaps start out with a SC engine. At the very least, you'll be starting out with a forged crank and rods. However, you'll still need a good set of forged pistons.
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post #4 of 10 (permalink) Old 11-14-2006, 08:02 PM
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Cutting out some of the carpet underneath the throttle pedal could help? (Sorry, I had to do that.)

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1994 Super Coupe ('93 5.0L swap), 1990 Tbird 3.8L, 1982 Honda CB900F, 1972 F-100 SportCustom 4x4, 1970 Chevy Custom Camper / 20
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post #5 of 10 (permalink) Old 11-21-2006, 08:46 PM
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Quote:
Originally Posted by master486
To increase the maximum RPM, or raise the rev limiter, you need to get a tune.

To run the boost that you want, you're gonna need a new engine. That 3.8 in your car isn't capable of handling that amount of boost. You WILL blow it up. If you want to run massive amounts of boost (i.e. more than 8 psi) you'll need forged internals.

Why do you say that, With a safe tune the stock N/A bottom end is good for 111-12psi boost. Mines still living happily at 10psi for the last 30,000 miles and I see 10psi daily when I drive it to work. 112k on the stock bottom end. RPM kills the bottom end quicker then boost, just keep it under 6000rpm.
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post #6 of 10 (permalink) Old 11-21-2006, 11:22 PM
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On kinda the same note, what's a safe max RPM for a stock 3.8?

"WHAT CONE?!?!

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post #7 of 10 (permalink) Old 11-22-2006, 05:50 AM
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The stock 3.8L will hold up great to 6500rpm without boost, but its done making power at only 4200rpm so there is no use in reving it past 4500rpm. Even my engine with a cam and ported heads needed to rev to 5000rpm before I lost power and needed to shift gears.
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post #8 of 10 (permalink) Old 11-22-2006, 08:19 AM
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6500?! Wow, I've never felt comfortable taking it over 5

"WHAT CONE?!?!

1997 T-Bird Sport, 'Interceptor' (12 ESP 2008-2012)- CAI, 2.25 duals, Flowmaster 40 series, Clear corners, BBK 70mm Throttle Body, TrickFlow upper intake, PI Intake, BBK adjustable fuel pressure regulator, LE stripes, Bullitt-style gauge faces. 18x9 wheels, Sniper tuned, 3,620 pounds


1991 Ford F250 - Air restrictor delete. Cat delete.

1991 T-Bird 'Interceptor II' (12 CP 2013-) - Race-prep, Full custom "interior", Carb'd 302, Trick Flow twisted wedge heads, stage 1 cam, Custom Koni coil-overs front, Koni yellows rear, Cobra front brakes, fuel cell, 18X9 wheels, 275/30 Hoosier A6, 4.11 T-Lok. 3000 pounds

2004 Toyota Solara SE - V6, Sport package, Muffler delete, 17X7 wheels, 235/50 Conti ExtremeContact DWS
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post #9 of 10 (permalink) Old 11-22-2006, 09:41 PM
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i agree with rancher lee, these cars can handle a good bit of boost in comparison to other vehicles. i think the key is making sure you get the proper air/fuel ratio. ie - don't starve your engine of fuel if your going to use boost.
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post #10 of 10 (permalink) Old 12-02-2006, 06:31 PM
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your transmission is whats limiting your rev capabilities, well, that and your power band is only good up to 4500 anyway. But the torque converters balloon around 5000rpm. Too much of this will make it go kaboom. I'll admit I've taken mine to 5000 or even 5500 a few times, but this stock tranny has had it anyway, I could care less if it commits suicide.
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