Vortech T trim
Senior Member
Joined: Jul 2005
Posts: 2,105
From: Central North Carolina
It depends. That is right on the edge. Generally a good LS1 can take boost up to putting out about 450 ft lbs of torque at the rear wheels -- about 465 RWHP: I've never seen an LS1 below that come apart unless its been abused and I've seen a few go well past 150K miles with 5-6 lbs of boost at max thorttle - and I've never seen one boosted to over 475 - 485 stay together for more than a couple of months.
That level of HP corresponds to somewhere around 5-7 lbs. Realize that boost pressure actually depends on the heads and exhaust and cam, too: make it easier for the engine to breath and the supercharger will feed more air into the engine, but require less backpressure (boost) to do so. I had a Maggie that made 465 torque and RWHP at 5.6 lbs on an LS6 - the same set up on an LS1 made 6+lbs and about 450 each.
That level of HP corresponds to somewhere around 5-7 lbs. Realize that boost pressure actually depends on the heads and exhaust and cam, too: make it easier for the engine to breath and the supercharger will feed more air into the engine, but require less backpressure (boost) to do so. I had a Maggie that made 465 torque and RWHP at 5.6 lbs on an LS6 - the same set up on an LS1 made 6+lbs and about 450 each.
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Junior Member
Joined: Oct 2008
Posts: 11
Thank you Lee. My question is slightly different. Does the T trim blow more air in terms of cfm compared to the S trim if so, would 7 psi on a T trim would be safe for my 55000 miles motor.
Regards
Regards
It depends. That is right on the edge. Generally a good LS1 can take boost up to putting out about 450 ft lbs of torque at the rear wheels -- about 465 RWHP: I've never seen an LS1 below that come apart unless its been abused and I've seen a few go well past 150K miles with 5-6 lbs of boost at max thorttle - and I've never seen one boosted to over 475 - 485 stay together for more than a couple of months.
That level of HP corresponds to somewhere around 5-7 lbs. Realize that boost pressure actually depends on the heads and exhaust and cam, too: make it easier for the engine to breath and the supercharger will feed more air into the engine, but require less backpressure (boost) to do so. I had a Maggie that made 465 torque and RWHP at 5.6 lbs on an LS6 - the same set up on an LS1 made 6+lbs and about 450 each.
That level of HP corresponds to somewhere around 5-7 lbs. Realize that boost pressure actually depends on the heads and exhaust and cam, too: make it easier for the engine to breath and the supercharger will feed more air into the engine, but require less backpressure (boost) to do so. I had a Maggie that made 465 torque and RWHP at 5.6 lbs on an LS6 - the same set up on an LS1 made 6+lbs and about 450 each.
Senior Member
Joined: Jul 2005
Posts: 2,105
From: Central North Carolina
Yeah, I think the T trim would blow more air - so on the same engine it will blow more air and create a higher pressure (the higher pressure is how it is blowing more air), but overall I would think 7lbs is going to be a bit more than I would fit to an LS1: any L
LS1 you are likely to pick up is going to have a few miles on it, more likely, and so I'd take it a bit easy -- it may already have had some wear and abuse put to it -- unless of course, you rebuild it, in which case definately put in premium parts and add strength.
LS1 you are likely to pick up is going to have a few miles on it, more likely, and so I'd take it a bit easy -- it may already have had some wear and abuse put to it -- unless of course, you rebuild it, in which case definately put in premium parts and add strength.
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