Got a new motor inbound - F-Body Road Racing and Autocross Forums

Alot of you know that my car has been down for a year now and I have been working on a mega compression stock inched motor. But I needed something just to get the car back on the road. If I couldnt get my fix soon I was probably going to slip into some horrible bi-polar depression.

One of the other moderators on LS1tech.com was unloading his cam only motor at an extremely good price and he was nice enough to lower it even further for me.

Its a 98 motor with a TREX cam (242/248 .608/.612 110), double valve springs, MTI rods, ARE oil pump, cloyes timing set with JWIS chain. The motor is complete minus headers, intake, TB, Fuel rails and injectors. I have everything except the TB and the headers.

Its last dyno it made 417rwhp through a TH350 w/ 5000 stall (unlocked), 5.xx gears and "31 slicks. Thats pretty stout considering its a cam only motor. I currently have an LS1 intake which will choke it down a bit but with a M6 and a 10 bolt with CF driveshaft and regular sized tires it should still make some good hp. My only concern is the cam. The TREX is BRUTAL. The ramp rates are astronomicaly fast which doesnt lead to long valve train life around a road course. So I may think about dropping my Grand Am cam in it. Wont make as much HP but the valve train will survive alot longer. I am hoping to have the motor up here from Texas in the next couple of weeks.

NataSS Inc View Member Profile	Jun 7 2005, 04:48 PM Post #1
Advanced Member Group: Advanced Members Posts: 827 Joined: 30-December 03 From: Bellevue WA Member No.: 73	Alot of you know that my car has been down for a year now and I have been working on a mega compression stock inched motor. But I needed something just to get the car back on the road. If I couldnt get my fix soon I was probably going to slip into some horrible bi-polar depression. One of the other moderators on LS1tech.com was unloading his cam only motor at an extremely good price and he was nice enough to lower it even further for me. Its a 98 motor with a TREX cam (242/248 .608/.612 110), double valve springs, MTI rods, ARE oil pump, cloyes timing set with JWIS chain. The motor is complete minus headers, intake, TB, Fuel rails and injectors. I have everything except the TB and the headers. Its last dyno it made 417rwhp through a TH350 w/ 5000 stall (unlocked), 5.xx gears and "31 slicks. Thats pretty stout considering its a cam only motor. I currently have an LS1 intake which will choke it down a bit but with a M6 and a 10 bolt with CF driveshaft and regular sized tires it should still make some good hp. My only concern is the cam. The TREX is BRUTAL. The ramp rates are astronomicaly fast which doesnt lead to long valve train life around a road course. So I may think about dropping my Grand Am cam in it. Wont make as much HP but the valve train will survive alot longer. I am hoping to have the motor up here from Texas in the next couple of weeks.

NataSS Inc View Member Profile	Jun 7 2005, 11:26 PM Post #2
Advanced Member Group: Advanced Members Posts: 827 Joined: 30-December 03 From: Bellevue WA Member No.: 73	QUOTE (rmackintosh @ Jun 7 2005, 13:47) QUOTE (NataSS Inc @ Jun 7 2005, 11:22) Mainly funds. 14.0:1, 8000+rpm motors cost bookoo. I am basically making a higher compression more powerfull world challenge motor. ...I guess the question is.....WHY? Are you gonna run this thing in some road racing circuit.....seems HIGHLY overkill for ANYTHING that will see the street....JMHO... (IMG:http://www.frrax.com/rrforum/style_emoticons/default/unsure.gif) Maybe even the better question......why NOT? The car isnt a street car and hasnt been for some time. It has been seen on the street from time to time though. W/ the new motor it will be even less. I run the open road races and am trying to hit 200mph on a stock inched, NA Ls1. And to do that its going to need to spin and make oodles of HP. And be able to do it for 1/2 hour to 40 minutes at a shot.