powah!

[Cobain03]

i currently have the edelbrock performer intake on my 289. what should i go to to get more power? the RPM? the weiand stealth?

any more suggestions to get some more performance outta my car

 

[MrBobMarley]

How about some new heads? Another intake probably won't make the power jump you want without the help of nice flowing heads. I don't think working the 289 heads will get you where you want either. Was your shortblock a stock rebuild?

 

[Cobain03]

mods in sig, but its bored 30 over with a cam

 

[Max Power]

You will see a small increase, but it's just a bunch of shuffling around until you buy heads.

 

[iskwezm]

heads will be a bigger improvement, and then get a matching cam

 

[Cobain03]

the cam is new, and matches up to performer heads (i dunno bout the rpm heads) but would my cam be good with the gt40 heads? the cam is not coming out.

 

[DJCarbine]

I think some good can be done by porting out the exhaust ports on the stock heads.

If you want to really get it going, buy a matched set with intake/heads/carb that will work well together.

 

[Dark Knight]

I have the performer on my vert with AFR's, works good even with the stock cam. Spend the $$ in some good heads and try port matching the performer to the head and you'll pick up a bunch. And spend a little more time on the dyno tweaking the timing, 3-4* timing changed my HP by 10-20...

 

[Cobain03]

ok i got to talking with a guy who has a 66 and hes putting down some serious power. i told em i dynoed and got 150 horse and he looked at me. he asked about the engine and he said the heads was where its killing the engine. not letting enough air in. he reccomended a place here in town that will work my heads and put in larger valves (said they were chevy valves) something like 194/205 valves.

your two cents?

 

[DJCarbine]

For the price of mosy machine shops to port and work the heads... you are almost at the price of a set of aluminum heads

 

[57fairlane]

If you are that cheap search EBAY.

I picked up a set of dart windsor jr aluminums for $700 for the pair.

A decent set will run you ~$1000 for a fully assembled pair. Pretty much all $700 pair alums need work (Take off GT-40s X/Y, Superflow heads etc . . .)

 

[Dark Knight]

I have a set of 66 289 heads that have been ported and have the chevy valves in them. They dont flow even close to what my AFR 165's do. Save the $$ up for some name brand alum heads. Skip the ones you havent heard of, usually more $$ to get them right and it's not a part that you want to go cheap on.

 

[Max Power]

You can't port factory heads to flow as well as good aftermarket ones. You hit water jackets. Modern aftermarket heads are designed with 21st century technology, not late 50s technology.

If you want to make power, quit screwing around with band-aids and get some decent heads.