Put the car on the dyno
Thread Starter
Instructor
Joined: Feb 2007
Posts: 112
Likes: 0
From: Macungie PA
Put the car on the dyno
I had my 90 on the Dyno tonight. Dynojet
Results,
Max Power 217.89 at 4,600 rpm
Max Torque 296.45 at 3,500 rpm
The power fell off hard after 5,000 rpm. The Air/Fuel was at 11 to 1
Results,
Max Power 217.89 at 4,600 rpm
Max Torque 296.45 at 3,500 rpm
The power fell off hard after 5,000 rpm. The Air/Fuel was at 11 to 1
Race Director
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Team Owner
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From: Athens AL
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Le Mans Master
Joined: Jan 2002
Posts: 9,036
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From: Edmonton AB
350HO #12486041
Specs: 330HP @ 5000 RPM, 380TQ @ 3800 RPM
Camshaft #24502476: 0.435”/0.460”, 212°/222° @ 0.050
Heads #12558060: Vortec Iron 64cc w/ 9.0:1
Are the Vortec heads still on it? If so, what intake base did youSpecs: 330HP @ 5000 RPM, 380TQ @ 3800 RPM
Camshaft #24502476: 0.435”/0.460”, 212°/222° @ 0.050
Heads #12558060: Vortec Iron 64cc w/ 9.0:1
use to adapt the TPI Plenum and runners to the Vortec heads?
The Vortecs breath respectably. With iron heads, 9:1 is compatible
with readily available fuel. My vote is that you are closer to realizing
the engine's potential than it might have first seemed.
.
Drifting
Joined: Oct 2005
Posts: 1,257
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From: North Carolina
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
First, you need to understand that the TPI was originally designed for the 305 (Three-0-Five) cubic inch engines.
So, then GM plopped it on a 350 (three FIVE O), which is 45 cubic inches larger. Think of it this way, if your 350 had 45 more cubic inches, it would be a 395!! Add 45 cubic inches to that and you'll have a 440!!!
So you can see from the get-go that airflow is going to be your main problem; a 305 system trying to feed a 350 engine.
Ever wonder why the SuperRam, Holley Stealth Ram and TPIS' Mini-Ram are so popular. Yep; you've got it.
Get an intake setup that'll breathe above 4500 RPMs and, THEN you'll be good-to-go.
Jake
So, then GM plopped it on a 350 (three FIVE O), which is 45 cubic inches larger. Think of it this way, if your 350 had 45 more cubic inches, it would be a 395!! Add 45 cubic inches to that and you'll have a 440!!!
So you can see from the get-go that airflow is going to be your main problem; a 305 system trying to feed a 350 engine.
Ever wonder why the SuperRam, Holley Stealth Ram and TPIS' Mini-Ram are so popular. Yep; you've got it.
Get an intake setup that'll breathe above 4500 RPMs and, THEN you'll be good-to-go.
Jake
Thread Starter
Instructor
Joined: Feb 2007
Posts: 112
Likes: 0
From: Macungie PA
Thread Starter
Instructor
Joined: Feb 2007
Posts: 112
Likes: 0
From: Macungie PA
350HO #12486041
Specs: 330HP @ 5000 RPM, 380TQ @ 3800 RPM
Camshaft #24502476: 0.435”/0.460”, 212°/222° @ 0.050
Heads #12558060: Vortec Iron 64cc w/ 9.0:1
Are the Vortec heads still on it? If so, what intake base did youSpecs: 330HP @ 5000 RPM, 380TQ @ 3800 RPM
Camshaft #24502476: 0.435”/0.460”, 212°/222° @ 0.050
Heads #12558060: Vortec Iron 64cc w/ 9.0:1
use to adapt the TPI Plenum and runners to the Vortec heads?
The Vortecs breath respectably. With iron heads, 9:1 is compatible
with readily available fuel. My vote is that you are closer to realizing
the engine's potential than it might have first seemed.
.
No the Vortec heads are not on it. Someone put the 113 heads back on.
Le Mans Master
Joined: Apr 2005
Posts: 8,077
Likes: 4
From: Scarborough ONTARIO
Here is my Dyno graph of my old 350 motor with Tpis flat tappet Cam/Dart heads, headers,........and Accel manifold, Tpis ported plenum, and Accel LT runners, this is my old combo, my current one is 383/219/dart heads/SR..... here is a dyno graph of old TPI
Observe no power after 4700 rpm, even this Tpi is aftermarket with LT runners, accel base and ported plenum.
Observe no power after 4700 rpm, even this Tpi is aftermarket with LT runners, accel base and ported plenum.
Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
Then heads and cam it should be. Waste some good money on heads and cam then put a TPI on it and watch the HP STAY THE SAME as if you had the stock heads and cam on it.
Lets play pretend.
You are in the middle of an open field no one around you and all the fresh air you can breathe. Put a 1/16" dia straw in your mouth and see how much air you can suck in in 1 minute. Now lets pretend that the straw is a TPI intake.
Danspeed, keep your TPI if you like it so much. You will be limited to around 280 rwhp with an automatic car. If that's enough you don't need a MR, SR, aftermarket heads or aftermarket cam.