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Old 05-11-2012, 07:48 PM
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305 Tpi

I traded up a 305 TPI the other day. I didn't plan on even putting it in anything just robbing the TPI. I did some research and found its a 1989 with roller cam, and rated at 230 hp. Now thinking I may put it in my '55 any see how she feels.I can always swap in a different long block later.

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Old 05-11-2012, 10:02 PM
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Quote:
Originally Posted by WV junkman
I traded up a 305 TPI the other day. I didn't plan on even putting it in anything just robbing the TPI. I did some research and found its a 1989 with roller cam, and rated at 230 hp. Now thinking I may put it in my '55 any see how she feels.I can always swap in a different long block later.
Sure beats walking! Obviously everything would be an easy swap if you went w/another SBC later on. And depending on the way you use the '55, it may be fine as-is.
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Old 05-11-2012, 10:20 PM
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Not to put down the TPI system, but those things have really lost their luster.

I remember the late 90's when those things were all the rage, everyone was swapping to them, and dumping boatloads of cash into them.

Unfortunately, it didn't take long for people to figure out they didn't really make any more power than a well tuned carburetor setup.

A good friend of mine had a complete set up, with aluminum heads....he tried to sell it for a couple of years, finally sold the heads, and ended up giving the TPI parts away. Nobody wanted it.
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Old 05-12-2012, 02:44 PM
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Quote:
Originally Posted by MrJones
Not to put down the TPI system, but those things have really lost their luster.

I remember the late 90's when those things were all the rage, everyone was swapping to them, and dumping boatloads of cash into them.

Unfortunately, it didn't take long for people to figure out they didn't really make any more power than a well tuned carburetor setup.

A good friend of mine had a complete set up, with aluminum heads....he tried to sell it for a couple of years, finally sold the heads, and ended up giving the TPI parts away. Nobody wanted it.
Yeah free. That's about what I have in mine. I had a GTA with TPI, I really liked the way it ran plus I think it looks cool. Not a huge carb fan either.
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Old 05-12-2012, 06:32 PM
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Quote:
Originally Posted by MrJones
Not to put down the TPI system, but those things have really lost their luster.

I remember the late 90's when those things were all the rage, everyone was swapping to them, and dumping boatloads of cash into them.

Unfortunately, it didn't take long for people to figure out they didn't really make any more power than a well tuned carburetor setup.

A good friend of mine had a complete set up, with aluminum heads....he tried to sell it for a couple of years, finally sold the heads, and ended up giving the TPI parts away. Nobody wanted it.
It's too bad, that this kind of thinking exists. One doesn't traditionally go to FI for more horsepower. One does go with FI if they are interested in excellent throttle response, less emissions, better cold starting, better gas mileage, better all around drivability all the time putting out the same HP as a carbed engine. Sure carbs are better for all out racing, but for the street? Give me FI. TPI got a bad rap because the factory unit was out of breath by 4800 RPM. That can be remedied with a aftermarket base plate and larger volume runners that will get the upper RPM range to 5500-5800. That is more than enough for most street driven cars but in the ongoing never ending quest to have the most HP during bench racing sessions it gets people to turn their noses up at it. If you know of any other free complete TPI units, pm me with the info. I will gladly trade my carb for FI any day.
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Old 05-12-2012, 10:11 PM
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If it's free, and you want to keep it stock, by all means use it.
I'm a big fan of the trusty TBI they used on trucks, myself.

The guys I ran with were building 383s and 406s, with Trick Flow or whatever heads, TPI systems were modified to run MAF instead of MAP, they bought the programable ECMs and software...... running them in 3rd gen F bodies. And they raced them.
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Old 05-13-2012, 07:17 AM
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The key to the TPI is to not get all caught up in the HP wars.

This is a high torque @low mid rpm induction system not a high rpm high HP system.

Keep the motor near stock. with mild modifications like long tube headers
Mild, moderate cam, stock TPI head home porting , moderate compression increase and it will do what it does best.

Make it better in its natural tuned rpm range. idle to 5000rpm.
Make it better at what it is good for. Torque
concentrate on the mid range and make torque.

And the whole 305 TPI system including the 305 TPI heads (081) can be transfered to a mild 350. Makes for a very high torque street cruiser motor.
Even makes a good towing motor.
The cork in the TPI motor is the crappy exhaust manifolds and stock exhaust system.

Last edited by F-BIRD'88; 05-13-2012 at 07:40 AM.
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Old 05-13-2012, 02:52 PM
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I'm building a cruiser not a race car so I believe it will be fine with minor mods. Thanks for the input any ideas are welcome. Also want a overdrive trans. leaning toward auto but not totally against manual
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