Towing with a 99 GMC Suburban 7.4L
A buddy is selling his 99 Suburban 4x4 with the 7.4L (454) for a great price. Not sure of the model but it’s loadd with leather. It’s in very good condition except a little paint peeling on the ro...
Forum Discussion
IIRC these numbers, but should be close enough for discussion...
Our Vette with a L88 (big block 427) we ran on track days back in the late 60's had (great discussion and disagreements) 550 Ft/Lbs and 530 HP at around 5K RPMs. To run at that level required 103 Octane. Sold out of that partnership, as knew I'd kill myself in it. Bought into that partnership when it had a small block 327 (such a sweet setup and one of my best engine builds) and they talked me into funding the L88...but...that body was NOT built for that kind of engine...first time nailed it wanting "to go this'a way" and "it went that'a way"...said it was going to kill me one day if did't get out of that partnership...
My L21 (big block 7.4L) is around 410 Ft/Lbs (1,800 RPMs and up) and 290 HP. Red line is dashed from around 4,300 RPM and solid at 4,800 RPM. Power drops off at around 3,800 RPMs so not much to gain above that except for HP
The L18 (8.1 big block) is around 450 Ft/Lbs and 330 HP.
Now with +168K miles of extreme usage (worst was towing a 8.5K + trailer from sea level up to Lake Tahoe..often and WOT keeping up with the others with newer TVs) and just plain fun boy racer used as a car...could smoke the rear's anytime AFTER figuring out that the computer denied power mode when it got over 200*F.
Today, it no longer has the juice to smoke'm, but does run strong in reference to just car boy racer stuff. Towing (sold the boat and just borrow trailers from church members) really shows that it has lost a few pony's...and the why noodling a crate (dropping that, but will continue to search as a just in case) or rebuilding. Target is L88 levels or more on 87 to 9X Octane (cam, valve train, tune, etc) and still pass Calif SMOG...maybe a turbo installed in back for altitude towing...throttle lag isn't a problem there...and a maybe brake launch when testosterone kicks in...
To the OP, there are lots of other stuff forgotten and will noodle to post. Fun stuff for me...
On my second steering box. First had to be tightened often till it started to leak. Since you say 'farm' am noting this...as used to off road much more and used the front tires to move stones out'a the way...
There is an adjusting set screw on top of the steering box and locked in with a jam nut. Careful, as you can ruin the box by over tightening. I'll dig up the old thread posted on HOW2, but it has Photobucket pics...which won't work and have to find original pic's to post
Our Vette with a L88 (big block 427) we ran on track days back in the late 60's had (great discussion and disagreements) 550 Ft/Lbs and 530 HP at around 5K RPMs. To run at that level required 103 Octane. Sold out of that partnership, as knew I'd kill myself in it. Bought into that partnership when it had a small block 327 (such a sweet setup and one of my best engine builds) and they talked me into funding the L88...but...that body was NOT built for that kind of engine...first time nailed it wanting "to go this'a way" and "it went that'a way"...said it was going to kill me one day if did't get out of that partnership...
My L21 (big block 7.4L) is around 410 Ft/Lbs (1,800 RPMs and up) and 290 HP. Red line is dashed from around 4,300 RPM and solid at 4,800 RPM. Power drops off at around 3,800 RPMs so not much to gain above that except for HP
The L18 (8.1 big block) is around 450 Ft/Lbs and 330 HP.
Now with +168K miles of extreme usage (worst was towing a 8.5K + trailer from sea level up to Lake Tahoe..often and WOT keeping up with the others with newer TVs) and just plain fun boy racer used as a car...could smoke the rear's anytime AFTER figuring out that the computer denied power mode when it got over 200*F.
Today, it no longer has the juice to smoke'm, but does run strong in reference to just car boy racer stuff. Towing (sold the boat and just borrow trailers from church members) really shows that it has lost a few pony's...and the why noodling a crate (dropping that, but will continue to search as a just in case) or rebuilding. Target is L88 levels or more on 87 to 9X Octane (cam, valve train, tune, etc) and still pass Calif SMOG...maybe a turbo installed in back for altitude towing...throttle lag isn't a problem there...and a maybe brake launch when testosterone kicks in...
To the OP, there are lots of other stuff forgotten and will noodle to post. Fun stuff for me...
On my second steering box. First had to be tightened often till it started to leak. Since you say 'farm' am noting this...as used to off road much more and used the front tires to move stones out'a the way...
There is an adjusting set screw on top of the steering box and locked in with a jam nut. Careful, as you can ruin the box by over tightening. I'll dig up the old thread posted on HOW2, but it has Photobucket pics...which won't work and have to find original pic's to post
