Striker27

Looking at breathing a bit of life into my 86 TPI non roller block 305...... I still have a bit of idle issues I need to solve and my fan is always on but I think I am on the right track with those issues. What I would like to do is get the car up to around 250RWHP... What should I do other then tossing out the block I already have in the car and going with a 350...

Any help would be nice...

I am looking at a new cat back I have some SLP runners the plenum is ported I know I need a cam but what one? I will probably buy some decent headers... Which ones are smog legal and preferred?


THANKS

FRMULA88

http://www.nitrousexpress.com/chevro...s-systems.html

Most HP for the $. Easy to install & easy to remove when you want to sell the car.

A 100HP shot is a lot of fun... and will not hurt the engine / pistons.

I would leave the engine alone. all the other mods will wind up costing much more time & money and not yield the same result.

FRMULA88

for your reference:

"The GM TPI system was based upon the flow characteristics of the lowly 305ci engine. These systems were flow-limited on a stock 350, let alone on a modified one. Mathematically (airflow at 28 inches of H2O x 0.257=HP potential), the airflow potential of a stock GM TPI can support approximately 350 horsepower on an optimized engine. If it is important to retain emissions compliance, ACCEL, Edelbrock, Ford Motorsports, or TPI offer high-flowing California Air Resources Board (CARB)-approved intakes that will support larger engine displacement and higher-flowing cylinder heads while keeping the feds happy.

New to the market for non-emissions-controlled applications are fuel-injected, single-plane manifolds from ACCEL and Edelbrock. These units offer runner lengths, flow capabilities, and tuning characteristics similar to their carbureted counterparts. "


"Factory port EFI systems allow OE engineers to drastically lengthen the intake tract to generate copious low-rpm torque, resulting in increased driveability and fuel economy. Most hot rods, though, are designed around horsepower, not torque. With torque defined as the amount of work that can be accomplished, horsepower is how fast that work can be done. Very simply, you need cylinder filling to make torque and rpm for power. Referencing the "Lengths to Various Points in Cylinder Head and Intake System" chart in the text, we can see the drastic runner-length difference between a GM TPI and popular wet-flow intake manifolds. Camshaft profiles that would work well with either a single- or dual-plane intake will not be effective with a long-runner TPI"

Read more: http://www.hotrod.com/techarticles/e...#ixzz2choxnYcT

Orr89RocZ

iTrader: (20)

Yeah its possible. A peanut cammed lb9 with a stealth ram intake dyno'd 200 whp. A L98 cam should be closer to 220's. Add a good comp xe grind, 260-264 advertised duration and as much lift as you can fit on the stock heads, it should get 250 whp.

For comparison a good condition L98 with all the bolt ons and intake mods should be 250-260's whp

Striker27

Ok so if I can change out the can to something more suitable install the runners and make sure my plenum is port matched then follow it up with a decent car back and exhaust I should be at 250RWHP? It am I still in need of a few more mods?

Thanks.

Striker27

I guess my biggest issue on can choice is I do not have a roller block..... Any cam manufactures that may be considered superior?

Striker27

I also already have a NOS kit. Looking for some more all around umph

FRMULA88

pill it till you kill it...

danclemts

iTrader: (1)

Lots of little/medium things will help, assuming motor is in good shape (leakdown test? compression test?) good free flowing exhaust, better cam, bumping fuel pressure, porting plenum, headers, upgraded ignition, injectors, good roller rockers, worked heads. It should be around that , but how much have you spent? If you can do all the work yourself, maybe a grand. If you're paying somebody, gets spendy. And your torque curve may even make the car less fun to drive under normal conditions.
The changes you've made so far are ok, Exhaust and headers are great idea. How did the SLP runners change the powerband?

Really best to start with a 350 roller block, You'll wish you had at some point in the future if you keep modding your 305. it's a bit more upfront in terms of work and cost, but in the long run, you'll have more bang for the buck. Not much choice in heads for 305 etc. I like my 305, but am looking for a 350 roller long block rather than keep upgrading my 305 (89 TPI)
I've done better exhaust, ported plenum, upgraded ignition, newer injectors, 1.52 roller tip rockers, Open element filter, adjustable FPR. Car is fun, sounds awesome, good throttle response, good mid range torque, and with my 3.73 rear is good off the line. Not gonna invest in head work/headers or a cam until I can get a 350. 305's are sweet motors and good DD's, but as soon as you want any real performance, start with a 350

Miami350

I have a 305 f code would be safe to put a hundred shot

Striker27

The 305 has only around 25000 miles on it so I am not looking at changing it anytime soon. Costs would just be parts I can do all my own work... Any advice on a can for a flat rapper block?

Tjanks

InfernalVortex

iTrader: (4)

Maybe. maybe not.