Eric Hawkins

iTrader: (3)

OK, we are starting with a 6.0 iron block, I have been told these blocks have a 9.230 deck height. I am going to have the block decked 0.010 so my deck height will be 9.220. I am going to run a stock stroke, 4.005 bore, a 6.3" rod, and a piston for a 402 stroker w/ a compression height of 1.105 and a 12cc dish. So the run down is this

9.220 Deck

1.811" (3.622 stroke x 0.5)
6.300" rod
1.105" Piston Comp Height

This would put me in the hole 0.004
With the 12cc dish, 0.030 gasket and 55cc combustion chambers I will have right at 11.1 to 1 compression ratio. With a 72cc chamber I would have 9.2 to 1 compression ratio.

This would be a dual purpose engine, I want to run it with the high comp ratio and a little nitrous till I can get the money up in a year or so for a blower, which them I would stick a really good thick deck head on there with a 72cc chamber.

Thoughts, comments, suggestions???

405HP_Z06

iTrader: (11)

Assuming a 4.060 head gasket bore diameter.

55cc


72cc


Looking at your intended use, this sounds like a nice universal configuration to fit both requirements. I would opt for a little more SCR for the N/A application but that would affect your future plans.

Eric Hawkins

iTrader: (3)

Thanks alot man!!!

Anyone else have any input on the setup?

Eric Hawkins

iTrader: (3)

Would you care to stick in my cam info to check my DCR. Also change the Combustion Chamber size to 52cc.

Advertised Specs Int-294 Exh-306
Dur. @ 0.050 Int-239 Exh-251
Lift w/1.8rr Int-0.604 Exh-0.570
LSA - 106

Could you pelase check it installed at 105 and 107 ICL. I tried to get that program you are using, it looks great. I just can't get it to work with Vista

Thanks alot

405HP_Z06

iTrader: (11)

What brand cam is that and what lobes does it use? Do you know the IVC @ .006 for one of the ICL identified above?

To run PT programs in Vista, see the following link: http://www.performancetrends.com/faq...sta_Compatible

405HP_Z06

iTrader: (11)

I'm not a huge fan of using DCR for anything other than a sublime performance indicator, so take it for what it's worth. I figured IVC based on the information provided and came up with the following:

106+1: 72
106-1: 74

Here's the calculations with 52cc chambers and the two IVC events above:

52cc, 106 + 1


52cc, 106 - 1

PappyDan

iTrader: (4)

how much of a difference would it make if you set it to
402ci like he wanted in his post.
i see that in all of the spec sheets the motor cubes is set for 365.

just wondering if a change in cubes will change the specs.

405HP_Z06

iTrader: (11)

He states he is using a stock stroke with a 402 piston. This is why he is using a 6.300" rod. If I put a 4" stroke crank in the calculation it would increase the compression but it would also put the piston .185" above the deck.

PappyDan

iTrader: (4)

ok i missed that, i thought he was building up a 402.
could you do one for me please.
i don't have much info but i bet you know where to find it.

im turning my 4.8 in to a 5.7 with a stock crank, rods, and pistons.
i will be useing my 4.8 heads with a comp 216/220 cam lift is 525/532 lsa 114
i have a set of 7.4 push rods, and 918 springs.
just wondering what my compression could be and if i may have a clearence issue
from the 4.8 heads small cc chamber.

405HP_Z06

iTrader: (11)

I need to know cam advance or intake center line to calculate DCR.

Here's SCR with the above specs:
Assumptions:
Stock GM 5.7 MLS head gasket
Piston .007 above the deck

Eric Hawkins

iTrader: (3)

Thanks for the link, as soon as I get home tonight I will give it a shot. The cam is a GM Grand Am Cup, I do not know the other info.

Thanks alot, I do not put much thought in to the DCR but I was doing some math last night and kept coming up with crazy numbers so I just wanted to see what the program said.

I think this will be a great combo for what I want and the long rod with that cam should be a screamer.

Again thanks!!!

PappyDan

iTrader: (4)

Hyd. Hyd. 1300 to 6300 54-414-11 XR269HR
in 269 out 273
@ .050 in 216 @220
lift with a 1.7 rocker .525 .532
LSA 114°
this is the only info i can find with comp cams on this cam.
i think the inteak center line is 112 @ .050