Best rod/piston combo for weight and strength for 600hp 6k redline

[69 GTX]

I've decided on the trick flow heads with 78 cc chamber. So I'm trying to come up with the lightest combo that'll stand up at 6000 rpm & 600 hp. I'm thinking I will need a flat top forged piston with 0 deck and valve reliefs. If anyone has their combo weights for comparison I'd be grateful. All input welcome.

 

[lewtot184]

i'm using an icon 836 piston with a light 440 source h-beam rod in a stock stroke 440. takes about 3/4lb of weight out per cylinder vs stock stuff.

 

[mentor70]

i went with the 440 source flat top, but i didnt like the pins that came with them, so i got Trend performance H-13 tool steel pins, the pistons and pins came to 895 grms.

if you go too light, you may sacrifice reliability and that HP level.

 

[cryplydog]

i went with the 440 source flat top, but i didnt like the pins that came with them, so i got Trend performance H-13 tool steel pins, the pistons and pins came to 895 grms.

if you go too light, you may sacrifice reliability and that HP level.

What was the gram weight of the source pins compared to the Trend H-13's.

 

[mentor70]

i didnt ck, but they looked kinda wimpy and i am building with the posibilty of using NOS so i wanted more insurance in the pins.

but im bob weight per assembly was 1194 grs per hole.

im using older 440source I beam rods with .990 pins and ARP 2000 fasteners.

 

[69 GTX]

With boosted engines bigger pins are better. Mine will be not be useing any power booster. And probably closer to 575 than 600 but wanted to error on the side of safety.

 

[69 GTX]

Lew are your 836 pistons flat top or dish, and what chamber cc is your head? Wondering what octane gas you run.

 

[SlinktRR]

With boosted engines bigger pins are better. Mine will be not be useing any power booster. And probably closer to 575 than 600 but wanted to error on the side of safety.

Can you safely run flat tops with pump gas and a 78cc chamber? I am going to run dished with the same chamber volume.

 

[69 GTX]

I'm thinking I may have to go dished. I believe I was told the old trw flat tops with zero deck and 7 cc valve reliefs should be run with 84-88 chambers. I would like to build it to run on 88-90 octane, then put 93 in it and bump the timing for trips to the strip. The cam I choose may be the deciding factor if it bleeds off some compression. Hoping Lew will chime in here with his combo.

 

[mentor70]

I'm thinking I may have to go dished. I believe I was told the old trw flat tops with zero deck and 7 cc valve reliefs should be run with 84-88 chambers. I would like to build it to run on 88-90 octane, then put 93 in it and bump the timing for trips to the strip. The cam I choose may be the deciding factor if it bleeds off some compression. Hoping Lew will chime in here with his combo.

going dished would make the trickflow heads almost a worthless purchase, unless you were making a stroker.

i have the Stealth heads with a Hughes engines stage 3 CNC, im at 78 cc for a 10.5 compression.

im using a 243 @ .50 Lunati roller.

IMO, if your not looking to make some power, then run a 9.0 comp, small cam and just use 452 or 906 heads, and save a ton of dough.

 

[SwedCharger67]

I'm using these pistons
http://store.440source.com/Platinum-Series-Pistons-4375-4-FT/productinfo/5055/

And they weigh the following, in grams:

Piston number Weight w. Pin Weight w/o pin Pin weight
1 703,6 545,7 157,9
2 703,6 546,0 157,6
3 703,3 545,2 158,1
4 702,9 544,8 158,1
5 703,8 546,1 157,7
6 703,9 545,9 158,0
7 703,4 545,8 157,6
8 703,0 545,3 157,7

Average 703,4 545,6 157,8

I didn't weigh the con rods.

 

[69 GTX]

Mentor the goal is 11.50 in the 1/4 so will need to make power. Probably shoot for 10.0:1. Were the ported stealths cheaper than the trick flows? I figured I'd have more in the stealths after replacing retainers & springs & port job to get them = to the Trick flows OOTB.
Icons compresion calculator showed 10.16:1 with the the 836 dish pistons, zero deck & .040 gasket.

 

[SwedCharger67]

I suddenly remembered that I did weigh also the con rods, and mixed and matched it all to get it as equal as possible:
This is the 512 stroker kit for the 400-block, all in grams: