opinions on a 305 TPI
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Joined: Nov 2001
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From: Madison Heights, MI
opinions on a 305 TPI I have a pretty much stock 305 sitting in my car and I'm wondering if trying to wake this up is worth the investment. The car is a porsche 914 weighing about 2000 pounds so I don't need lots of torque. The car pulls a low 13 quarter right now. but at the upper rpms it doesn't seem to pull as hard as it should.
Thread Starter
TECH Regular
Joined: Nov 2001
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From: Madison Heights, MI
hmm that would be interesting to try out. How long is the entire set up compared to the stock. The front of the motor sits behind the driver seat and there is about an inch of clearance where the throttle body is at.
http://pg.photos.yahoo.com/ph/nicksw...1a.jpg&.src=ph
http://pg.photos.yahoo.com/ph/nicksw...1a.jpg&.src=ph
Maybe its different in your small porsche, but i drove a 305 iroc a couple years back and that was one of the slowest cars ive ever driven. I think they had 190hp stock. Is it in your budget to save for a 350? Heck, for the price of a 350 you could have a 383? Either of these in your budget? If not, i dont really know what to tell you besides cam or heads to get the power. Do you have custom headers? I know the mini ram really helps the tpi motors out like orange88 was saying. Something cheap to add minimal ponies would be an airfoil.
Thread Starter
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Joined: Nov 2001
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From: Madison Heights, MI
It is way different in the porsche, I have half the weight of a Camaro. I'm not looking for a horsepower monster, just something cheap and easy to let this motor breathe a little easier. I still have the stock manifolds on, aftermarket headers don't fit, the collector exits right smack in the middle of the axle shaft. Most people put a carbed 350 in these cars, as ar as I know I am the only one who put fuel injection in it.
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Joined: Jun 2005
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From: Michigan
I think the 305 might have crossed 200hp on rare models a couple times but yeah, at best you have 200hp. If it runs good, I wouldn't do anything other than bolt ons. Maybe you can get some custom headers and a better intake to help it breath. only thing I would maybe do internally is a cam swap. you could go as far as to get some aftermarket heads but for that kind of money I'd swap it out for a 350. 305's were a good econo motor for drivers. small bore, doesn't allow much room to make them breath.
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i have a 305 tpi in my 85 trans am its not the fastest car but it has decent low end and its good enuff 2 be a daily drive........i checked it out and my engine is rated at 205hp, and if you know anything about tpi's they have terrible high end i guess its the way the intake manifold is designed it cant really breath at higer rpms you can port it? but most guys just swap to an lt1 or a mini ram manifold but you might have some clearance issues with your stock heads, either way if ur running 13's your pretty fast just dont do anything more to the engine it has really thin cylinder walls, IMO its just a really dependable daily drive v-8 not really a race engine
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go w/ this- this is what my bro did in his-
3" flowmaster exhaust-
Dynomax 3" cat
Headers
3.73's / locker
Edelbrock intake manifold
advanced timing
Holley fuel pump
K&N air filter
MSD 6A and wires
High flow fuel filter
Shift kit / servos
that woke his car up big time!
thats all the bolts on and after that he did -
i think 180cc AFR heads
Comp cam
100 shot of nitrous w/ stock timing
everything netted him 365whp and 385ft.lbs
3" flowmaster exhaust-
Dynomax 3" cat
Headers
3.73's / locker
Edelbrock intake manifold
advanced timing
Holley fuel pump
K&N air filter
MSD 6A and wires
High flow fuel filter
Shift kit / servos
that woke his car up big time!
thats all the bolts on and after that he did -
i think 180cc AFR heads
Comp cam
100 shot of nitrous w/ stock timing
everything netted him 365whp and 385ft.lbs
Thread Starter
TECH Regular
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
Thanks for the info guys,
I'm not interested in doing heads and a cam just yet, but headers and intake work should help me get what I am looking for.
Here is a picture of under the car. If you look closely you can see the exhaust setup. Since its a mid engine car there isn't much distance to work with.
http://pg.photos.yahoo.com/ph/nicksw...e2.jpg&.src=ph
I'm not interested in doing heads and a cam just yet, but headers and intake work should help me get what I am looking for.
Here is a picture of under the car. If you look closely you can see the exhaust setup. Since its a mid engine car there isn't much distance to work with.
http://pg.photos.yahoo.com/ph/nicksw...e2.jpg&.src=ph
Thread Starter
TECH Regular
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
What about ignition, I'm not sure what I have actually, most likely stock since I havent found a big red MSD Box hiding around anywhere. The distributor sticks out into the trunk 
On The Tree
Joined: Jul 2005
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From: Old Bridge "Raceway Park" N.J.
Originally Posted by Nick's WS6
What about ignition, I'm not sure what I have actually, most likely stock since I havent found a big red MSD Box hiding around anywhere. The distributor sticks out into the trunk
A better ignition (at this stage) can only help so much, especially if you're running the peanut cam, and you're set-up is unported.
Edit: Fixed link...
Last edited by Street Lethal; Jan 21, 2006 at 09:22 PM.
