low-end torque+ LSx motor, is it possible?
Apr 7, 2009 | 08:05 PM
#12
The OP is talking about low end torque in case you didn't read it....
Apr 7, 2009 | 08:27 PM
#14
I really could care less about 4000rpms when I'm towing. Ok, so my engine out of the box might make 380lb/ft, but it was less than adequate down low, especially with the 3.42s. It's now got 10.6-7:1 compression and 4.10s as well as a few other things to increase air flow and the low end still is not where I want it to be. The only thing left to do is to add a cam, but I'm doubtful that is really going to improve my low end highway pulling power. It may, by increasing the dynamic compression, but we will have to see. So the only solution I see is to step up to a larger displacement.
Apr 7, 2009 | 09:17 PM
#15
In one word, YES. I used to have a TBI 383 in a 94 suburban, that made less power at the crank then my new truck makes at the wheels and red lined at 4600rpm, and it was an absolute blast to drive. With a 1500 stall TC I could light up the tires at anytime and do donuts on dry pavement with 34" tires.
When your talking about trucks rather then the CAR that you have the demands from the motor are entirely different. I love the power of my radix 6L but I need to be above 2500rpm to get anything out of it, and when your towing a trailer, or just getting a 7000lb truck up a hill on the highway, that low rpm power is what you really want.
Apr 7, 2009 | 09:21 PM
#16
it's a given that the LS motors lack the low end grunt that most older small blocks seem to offer. what's it take to get some more usable "truck" power out of one of these motors?
big blocks always produce low end, and the general conception is that a stroker does too.
would a 408 with L92's and an LS6 cam run worth a f*ck for real-world, trailer pulling power? or would it be a dog down low like everything else, and run out of breath up top?
big blocks always produce low end, and the general conception is that a stroker does too.
would a 408 with L92's and an LS6 cam run worth a f*ck for real-world, trailer pulling power? or would it be a dog down low like everything else, and run out of breath up top?
Apr 7, 2009 | 09:41 PM
#17
meh, you wanna tow anything that really needs 400 lb ft of TQ to get it moving, don't f*ck with a small block gas engine, get big block, or better yet a duramax, chip it, and still get 20 mpg call it a day. I think your on the right track with the 4.10's. A cam with a lot of lift (.34-.35) and a tight LSA in a 220ish duration on both sides should get you there......otherwise........just a like everyone else says.........you either get more cubes, higher compression, blower, or like the aformentioned 383, 408 stroker kits.
Apr 7, 2009 | 09:50 PM
#18
Dont know much about GTO's huh? My little "Car" weighs 3800 lbs, pretty close (4-500 lbs) to a STD 1500 cab pickup. My demands on my car's drivetrain are actually similar to a truck where as a vette weighs in at 3100-3200 lbs
Apr 7, 2009 | 09:56 PM
#19
Joined: Apr 2004
Posts: 16,820
Likes: 2
From: In a van DOWN BY THE RIVER
I think this is getting off track. The ?? was low end tq out of the lsx engine. Which NO they don't make it like a older gen small block or big block does.. We are talking about LOW RPMs not high revving here..
Apr 7, 2009 | 10:07 PM
#20
get a comp 212/218 and be done with it. if its matters much i pulled my race car with my 6.0 and 230/226 cam, had 4.10s. hell it pulled just fine. total weight was 12k lbs