Quote:

---

Gregsdart runs the 440-1 heads an make somewhere around 900hp, so I would imagine your combination isn't maxed out. Generally speaking, adding more cubic inches will bring down your peak power RPM as you stated. If all else remains the same, I would imagine the gains would be minimal.
Here's a for you

---

Quote:

---

Quote:

---

Gregsdart runs the 440-1 heads an make somewhere around 900hp, so I would imagine your combination isn't maxed out. Generally speaking, adding more cubic inches will bring down your peak power RPM as you stated. If all else remains the same, I would imagine the gains would be minimal.
Here's a for you

---

You could send them out to have them ported to the max, if the 325 has enough meat left in them. Do they have the 2.25 intake valves? That would be my first move. Consider buying the valves a touch longer for better installed height if you are going up in valve size. It is tough (maybe impossible)to get more than 2.050 out of the standard length valves. I have plus retainers and keepers to get there.
I started with a max ported 440-1 and told the porter that I wanted lots of runner volume for Alky, and they run pretty good for a 528 cube motor. I also run the 3X intake.

---

Quote:

---

Indy 325 CNC heads flow 370 at .700 lift with the 2.18 intakes.

I had Jim LaRoy up in Challis, ID do the valve job on them and a little touch up to unshroud the chambers to the 4.5 bore. Here is how my 325's flow with the POS Indy valve job (before) and a good valve job. Note the ex/in flow ratio is pretty constant at around 82% across the lift range.

lift............before..........after

.100..........69/61.........80/68
.200........144/123......158/134
.300........215/172......226/183
.400........274/217......277/229
.500........321/251......320/265
.600........346/280......349/290
.700........362/301......368/307
.800........372/317......372/327


My heads have the 2.18 intakes. Jim experimented with dropping a 2.25 valve in without changing the seat. These are the results (I think he used a different cylinder as the before numbers are a little different):


i also run the r2 cam, w/1.5 rockers. i have a bigger one i havent run yet that is a 112 separation .750 lift that might be good in a bigger engine

i dont remember my flow numbers off my head, they was flowed as soon as i got them from indy, there has been a valve job on them since then

Quote:

---

I have 1.6 HS lifters and talking lash from the roller lifters into account I have right around .700 lift on both I and E. I can't wait to get this engine in my Demon but that will need a different (bigger for sure) radiator. I will be using 2 1/8 Mazzolini (TTI) semi-fenderwells.

I bought a World block because I heard too many horror stories about aluminum blocks not keeping the cylinders round without a fill. 200 lbs is a pretty high price to pay though for round walls. My 499 Keith Black block has a fill and seems to be OK but it gets warm driving on the street.

---

Don't believe everything you hear about round walls.

Quote:

---

Just depends on the other parts in the combo. You can crutch the smaller heads with extra valve lift, more compression, better oil control, etc.

I pushed my EZ heads up over 900 hp by working on everything other than the heads. [/quot



was thinking about that, open the valve further and hold it longer

how much torque will i gain going with more stroke like the 4.25 or 4.5

Quote:

---

Quote:

---

Quote:

---

Gregsdart runs the 440-1 heads an make somewhere around 900hp, so I would imagine your combination isn't maxed out. Generally speaking, adding more cubic inches will bring down your peak power RPM as you stated. If all else remains the same, I would imagine the gains would be minimal.
Here's a for you

---

You could send them out to have them ported to the max, if the 325 has enough meat left in them. Do they have the 2.25 intake valves? That would be my first move. Consider buying the valves a touch longer for better installed height if you are going up in valve size. It is tough (maybe impossible)to get more than 2.050 out of the standard length valves. I have plus retainers and keepers to get there.
I started with a max ported 440-1 and told the porter that I wanted lots of runner volume for Alky, and they run pretty good for a 528 cube motor. I also run the 3X intake.

---

this combo is no where close to max effort, and dont intend to get it on the edge,i want my engine to go 600 passes without any problem. no they are not 2.25 valves, there is alot that could be done these apparently. i also run alky but mine is carburated. so i can make 900hp with these heads, just need some good head work.

so if i put these heads on 540-572 as they are i will still be below 800hp is that what we think?

thanks guys

---

Quote:

---

I went with a 4.25 stroke because of piston speed and the availability of a windage tray that would fit the 4.25 crank. My rods are 7.1 long and the wrist pin is not in the oil groove. Biggest error on the motor was the 14-1 CR as that darn C-16 is pretty expensive.

---

I use the stock stroke Mopar windage trays in my BB Mopar stroker motors with the BB Chev rod journal sizes, 2.200 with forged H beam rods. My 400 block with a 4.300 stroke clear okay by a little bit by adding two extra Fel Pro thick oil pan gaskets between the block and the windage tary Lots of ways to skin the kitty I used a stock internal Mopar 3/8 oil pickup also

Quote:

---

the question is when running a smaller head than the cubic inch requires what does it do beside lowering the torque curve..

i have the 325cc -1 heads on my stock block 499, with the weight to et formula it makes 735hp. so thats a little less than 1.5 hp per ci

going to build a larger engine with a aluminum block i can build it any size, but will the heads limit the hp at a certain point? will i still gain some hp even with to small a head.

cant really afford more heads yet, just wanting that stock block out of there before it gives up.

thanks for some input.

---

Quote:

---

I am building the same motor as Lee what do you guys think as far as camshaft?

Lee, I hurt the 512 Saturday. Luckily we made a split at 4. I took the indy block and crank to Saint Louis today.

---