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Long rod 225 buildup
https://slantsix.org/forum/viewtopic.php?t=6333		 Page 1 of 1
Author:  Brett K [ Sun Jul 20, 2003 11:33 am ]
Post subject:  Long rod 225 buildup
I've reached a point in my long rod buildup that brings me to a question. The issue at hand is the compression ratio. I'm at approx 9:1 now, but if I go for a quench setup, it'll put me at right around 10.5:1. Given that this is going in a daily driven street car, with EFI and a 4 speed, I'm a bit torn. For those of you that have built up the 198/2.2 setup in the past, just how much compression will it handle on the street, before pump gas becomes a major issue?

FYI, the current buildup looks like this:

76 225 block
Forged crank (0.000/0.010)
198 rods
KB 2.2 turbo pistons (+18cc Dish)
Double roller timing set
Stand pipes in the lifter Valley

76 Head
Ford 300 valves and seals
Hardened seats
Ported/polished
340 Springs

I'd tell you about the injeciton setup, but I want to keep it under wraps for the time being. :)

Any thoughts on the motor/compression issue?
Author:  DusterIdiot [ Sun Jul 20, 2003 11:46 am ]
Post subject:  D
D
Author:  Doctor Dodge [ Sun Jul 20, 2003 3:05 pm ]
Post subject: 
What cam are you going to use?
Static compression / cylinder pressure and cam numbers go hand-in-hand.
DD
Author:  Brett k. [ Sun Jul 20, 2003 3:16 pm ]
Post subject: 
I'm going to order the cam once I've got everything else figured... Match it to the rest of the hardware, as it were.
Author:  slantzilla [ Tue Jul 22, 2003 6:39 pm ]
Post subject: 
Mine was running at about 11-1 on pump gas. The long rod seems to make the motor very resistant to detonation. I started with a 268*/.460" Racer Brown and ended up with a .528" Mopar cam. :shock:
Author:  Doctor Dodge [ Tue Jul 22, 2003 8:21 pm ]
Post subject: 
I have 12.5 to 1 in the one I'm building now, running an Isky 505 cam. (.505 lift)
my guess is that it will have 195 psi of cranking cylinder pressure, I plan to run this one on race gas . :twisted:
DD
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