View Poll Results: BIG Cube DD
Yes
72
85.71%
No, if so why
12
14.29%
Voters: 84. You may not vote on this poll
BIG cube DD?
Why would it be bad? Little less MPG... make sure it stays cool...
I guess it'd depend on your commute?
I swapped out a 350 and dropped in a 455 in my '68 GTO, neither engine was a screamer, but the extra torque made my commute more enjoyable.
I guess it'd depend on your commute?
I swapped out a 350 and dropped in a 455 in my '68 GTO, neither engine was a screamer, but the extra torque made my commute more enjoyable.
I just want to have something different! Just want to go another route. Don't want another run of the mill H/C LS1 , N2O or a blower, those are all to common nowadays.
Need to break away and try something new in the crowd! Figured the technology is there to support having a big cube as a DD.
Anyone else?
Need to break away and try something new in the crowd! Figured the technology is there to support having a big cube as a DD.
Anyone else?
Originally Posted by 03 BUSA
Not for a DD, I think a 402 setup would be better for a DD. I would think a 402 would have better manners on the street as opposed to a 427 + sized motor.
If anyone has any REAL information on this, I'd like to hear it. Just what kind of MPG does a 427+ motor get as a DD? Besides not running a crazy cam or gears, are there "tricks" to keeping the MPG viable for a DD?
Are there reasons besides that which would make it a bad idea?
Are there reasons besides that which would make it a bad idea?
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Originally Posted by MonkeyBoneSS
Would a big cube motor be a bad idea for a DD? Just want to get a few opinions on the question.
When I say big cube I am thinking 427-461ci.
When I say big cube I am thinking 427-461ci.
TECH Regular
Joined: Nov 2005
Posts: 459
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From: Arlington, TN
More Cubes = easier to handle larger lobe cam's not the other way around.
If you have the tune set up correctly a large displacement motor in a car that had an LS1 346 (that is using the same driveline) will only get slightly lower gas mileage then the LS1 did with a proper tune.
Now if you had an LS1 that wasn't tuned and were only get'n 20mpg then the large cube motor with a tune might actually get better gas mileage... Ironic.
If you have the tune set up correctly a large displacement motor in a car that had an LS1 346 (that is using the same driveline) will only get slightly lower gas mileage then the LS1 did with a proper tune.
Now if you had an LS1 that wasn't tuned and were only get'n 20mpg then the large cube motor with a tune might actually get better gas mileage... Ironic.
Last edited by Bring the Noise; Nov 19, 2006 at 03:35 AM.
im just trying to teach people that built SBCs can make BBC numbers without sacrificing driveability.
Originally Posted by caindo
so you''re saying that the c6 z06 is a bad DD eh? interesting ... 
Everyone misunderstood where I was coming from. If you are looking at the LS7 crate motor then I would agree with it being o.k. for a DD. However, most guys who are looking to drop an easy 10k on a 427 or larger cu LSx that I know of are not going with a docile cam type setup, they are looking for 600 + kind of numbers at the wheels and with that in mind, NA this would not be a great DD due to cam specs and compression to hit those numbers. I should have explained where I was coming from a little better. I apoligize. I would prefer to see more guys with 427 NA motors out there, there are too many nitrous, FI and 402's cars running around. I like the idea of doing something different from everyone else.
Originally Posted by SLED28
I would go with a 447 motor with a 4.125 stroke x 4.155 bore. We have many 4.125 stroke combos out there on the streets and they work great. Lots of power and torque everywhere!
What would be the projected power output with the 447? (Rear wheel of course)
Originally Posted by MonkeyBoneSS
Would a big cube motor be a bad idea for a DD? Just want to get a few opinions on the question.
When I say big cube I am thinking 427-461ci.
When I say big cube I am thinking 427-461ci.
Originally Posted by black_knight
LOL, too many variables. Heads, cam, intake, exhaust?
But of course I do know that. Say with a mild cam nothing to extrem.
What intake could be ran on a 447, LS6 - FAST- LS2?
Also what would be a mild cam for that size motor, 240 or 250?
Last edited by MonkeyBoneSS; Nov 19, 2006 at 06:40 PM.
Originally Posted by MonkeyBoneSS
But of course I do know that. Say with a mild cam nothing to extrem.
What intake could be ran on a 447, LS6 - FAST- LS2?
What intake could be ran on a 447, LS6 - FAST- LS2?
You would be looking in the range of a carb style or sheetmetal intake for that application. Fast would be the better plastic style intake but depending on other variables would most likely hold some power back.