6.0 v8
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From: Petal, ms
6.0 v8 i bent a rod in my ls1 that was in my ta. i found a 6.0 out of a sierra and was told it was an ls based motor. i know i will have to change the heads, oil pan, intake but was wondering if it really was an ls based motor and if my computer would work with this motor. any help with and i thank you.
the motor you found is an LQ4 motor. the heads on that motor as long as they are the aluminum ones are better flowing then your current stock heads. the casting is 317 and have same flow rates as the LS6 heads. only difference is the 72cc compared to the 65cc in the LS6 heads. i have them on my LQ9 motor. the cam is very similar to the cam in the early Y bodys. your pan and everything will bolt up to it. but you will have to drill and tap the one provision for the ALt bolt. its nothing major at all. i did it to mine when i used Fbody accesories for my truck. and yes all parts for your LS1 motor will work for that one. except your current heads. your motor i do believe has perimeter bolts where as 99 and later blocks had center bolts. as for the computer it will fire and run that motor but would optomize if you got a tune. also the CR on the LQ4 is about 9.5 and the CR on your LS1 is 10.1
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From: Petal, ms
Originally Posted by Quik
the motor you found is an LQ4 motor. the heads on that motor as long as they are the aluminum ones are better flowing then your current stock heads. the casting is 317 and have same flow rates as the LS6 heads. only difference is the 72cc compared to the 65cc in the LS6 heads. i have them on my LQ9 motor. the cam is very similar to the cam in the early Y bodys. your pan and everything will bolt up to it. but you will have to drill and tap the one provision for the ALt bolt. its nothing major at all. i did it to mine when i used Fbody accesories for my truck. and yes all parts for your LS1 motor will work for that one. except your current heads. your motor i do believe has perimeter bolts where as 99 and later blocks had center bolts. as for the computer it will fire and run that motor but would optomize if you got a tune. also the CR on the LQ4 is about 9.5 and the CR on your LS1 is 10.1
thanks for the help. so basicly i can put this motor in my trans am with no problem just have to use the heads on the motor instead of the ones on my car right? i have a comp cam .561/.567 lift that i was going to install. it will still fit in this motor without any problems right? also, the lower compression rate a plus or negative as far as power and performance. the motor has 22000 miles on it and the guy proved to me it ran and only wants $500 for it and a 2 year warranty. overall seems to be a good deal just had some questions. thanks.
i run a LS1 cam in my LQ9. its a 566/566 lift and no issues
only factor youll have is the added weight of the motor. since its and iron block youll gain about 80lbs up front. so the front will sag some. give you a rake effect. as for the lower CR youll only lose about 15hp honestly and youll gain that with a cam. if you had a 99 and later block you could use your heads but the 317s are a better head. if you wanted to you could just shave some off but becareful with an GenIII P to V clearance issues. for 500 bucks thats a good deal. just make sure its a 317 head motor.
only factor youll have is the added weight of the motor. since its and iron block youll gain about 80lbs up front. so the front will sag some. give you a rake effect. as for the lower CR youll only lose about 15hp honestly and youll gain that with a cam. if you had a 99 and later block you could use your heads but the 317s are a better head. if you wanted to you could just shave some off but becareful with an GenIII P to V clearance issues. for 500 bucks thats a good deal. just make sure its a 317 head motor.
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i looked on the heads and couldn't find the casting numbers. manifolds and everything is still on motor so could have missed it. is there any castings that is just a don't buy it?
well simple thing to look for are the heads aluminum or iron? if aluminum they are 317s. if iron then i would look for a set of aluminum heads.
and casting number is on passenger side front of head. its behind where the ilder is. also on the back of the driverside head.
and casting number is on passenger side front of head. its behind where the ilder is. also on the back of the driverside head.
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From: Petal, ms
yeah everything was included for a full pull out. i have to use my altenator, starter, intake everything else is the same. it hase cast iron heads though. i have to use my ls1 heads. other than that perfect match.
Originally Posted by PewterSSZ
yes they will but your better off with the 317s
*Also, what is this talk about iron heads on the 6.0?? I thought they all had aluminum 317s??
early LQ4s had iron heads. in 01 they swapped over to aluminum along with increase in power
317s stock are the same flow rates as 243s so if you flow more then LS6 heads then yes use yours if not then use the 317s
injectors are 25s
317s stock are the same flow rates as 243s so if you flow more then LS6 heads then yes use yours if not then use the 317s
injectors are 25s
