I need someone to sell me something for my 305 to make enough power to stick with a stock 4th gen z-28. I have a TPI 305, so sell me something or give me some advice. Thanks

 

Spend lots of money.

 

Lets see if I can remember this it's on my local machine shop's wall.......

Fast Good Cheap

you can have fast and good but not cheap and fast.
you can have good and cheap but not fast

basicly thats the way it is. best bang for the buck would be nitrous like a 100hp or 125hp shot(I wouldn't go past that on a old motor) but you risk blowing up your motor if it isn't in good shape.

 

it's not that hard... the hardest part is planning, and figuring what will work well togther...

pick some budget parts, and do the right machine work... things compliment each other.


rebuild the motor, bring the compression at least a half point higher... if no good aftermarket heads are available on a budget, have a valve job done to yours, and bowl work done to the heads. it will wake them up a bunch.

at that point it's up to camming... 210-220 or a 212/218 comp xe with a 112 lobe sep will both work very well in a 305 and be relativly easy to tune at least priliminarily.

at that point it's getting the trans to hold up, and shift right and gearing..

no matter which way you cut it.. trans, engine, and rear rebuild, retooling will run ya about 3-5 G's to do it allr ight.

all depending on how lucky you get with deals. and reusing parts.

 

pick your power adder, but for cheap fun your going to have to run a shot of nitrous to keep up with a 4th gen with your 305...or break the bank and do heads, cam and all the other go fast goodies and then hope.

 

You need to make at least 170 more horsepower. Unfortuntely there is no cheap way to do it. I ditched my 305TPI for an LS1 swap rather than build it up.

 

I've got three numbers for you.

Three
Five
Zero

 

Make it as big as you can.... get a 4" bore block, or even a 400 block (4.125") and get a stroker kit...

Cubic inches is the cheapest way to get more power.... and its always a sure thing too.

 

That's about it. "Go Big or Go Home"

305's are nice but there is nothing like more cubes

Later, Garrett

 

nawwwwwwwww

the three words are:

four

zero

zero

 

How about some letters:

LS1

 

dude,

for what it would cost to put a 330 hp, no-torque ls1 in a third gen, you could put a 400 with well over 400 hp and 400 lbs ft torque in the car.

 

Unfortunately emissions requirements and fuel consumption spoil the fun.

Lightly modified LS1s run in the high 11's and average 20-22 MPG mixed driving and 29 highway. All while passing the sniffer test.

 

fuel consumption and mileage are primarily a function of induction and heads.

a low compression 400 with a set of vortecs (better yet, fastburns) and a tpi or even an ls1 intake (all you have to do is drill a hole for a distributor) will make way more power than an ls1, get mileage just as good and pass emissions, too.

the biggest difference between gen 1 and gen 2 smallblocks was in the heads. much of that technology found it's way into the latest generation heads for 1st gens.

and first gens bolt right in. all accessories fit.

 

You are absolutely right. That is where the LS1 really shines. The flow of a stock LS1 head is usually greater than ported gen I/II heads. They also did a lot with the valve centerline angle as well.