copo replacement engine build
05-02-2013, 02:57 PM
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copo replacement engine build hey, first off...i dont have one, just came across this article.
http://www.dragzine.com/news/katech-...lus-horsepower
reading through it, they're building a 327 whipple...says 4.065 bore on LSX block. but my question is regarding the bore and the heads. says they are running GMPP LS7-LSx heads. says 2.205 intake valves, and replaced the hollow stem exhaust valves with stainless....1.615 exhaust.
when i look up the LS7-lsx heads (6 bolt) says valve sizes are 2.200/1.610, and they also say minimum bore of 4.100.
http://www.chevyhardcore.com/feature...ylinder-heads/
im just trying to figure out how all this went together, and if maybe some numbers are skewed a little....to me...seems like they got the heads (for minimum 4.100 bore) then put in bigger valves...and threw them on a 4.065 bore.....something is off...either the bore isnt 4.065, valves arent that big...wrong minimum bore stated....idk...numbers dont add up.....i can see some small bore LS7's working....dont know what to think i guess....
http://www.dragzine.com/news/katech-...lus-horsepower
reading through it, they're building a 327 whipple...says 4.065 bore on LSX block. but my question is regarding the bore and the heads. says they are running GMPP LS7-LSx heads. says 2.205 intake valves, and replaced the hollow stem exhaust valves with stainless....1.615 exhaust.
when i look up the LS7-lsx heads (6 bolt) says valve sizes are 2.200/1.610, and they also say minimum bore of 4.100.
http://www.chevyhardcore.com/feature...ylinder-heads/
im just trying to figure out how all this went together, and if maybe some numbers are skewed a little....to me...seems like they got the heads (for minimum 4.100 bore) then put in bigger valves...and threw them on a 4.065 bore.....something is off...either the bore isnt 4.065, valves arent that big...wrong minimum bore stated....idk...numbers dont add up.....i can see some small bore LS7's working....dont know what to think i guess....
05-02-2013, 06:46 PM
#2
IIRC....... they got that displacement by destroking it.
05-02-2013, 08:29 PM
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05-06-2013, 07:36 AM
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hey, first off...i dont have one, just came across this article.
http://www.dragzine.com/news/katech-...lus-horsepower
reading through it, they're building a 327 whipple...says 4.065 bore on LSX block. but my question is regarding the bore and the heads. says they are running GMPP LS7-LSx heads. says 2.205 intake valves, and replaced the hollow stem exhaust valves with stainless....1.615 exhaust.
when i look up the LS7-lsx heads (6 bolt) says valve sizes are 2.200/1.610, and they also say minimum bore of 4.100.
http://www.chevyhardcore.com/feature...ylinder-heads/
im just trying to figure out how all this went together, and if maybe some numbers are skewed a little....to me...seems like they got the heads (for minimum 4.100 bore) then put in bigger valves...and threw them on a 4.065 bore.....something is off...either the bore isnt 4.065, valves arent that big...wrong minimum bore stated....idk...numbers dont add up.....i can see some small bore LS7's working....dont know what to think i guess....
http://www.dragzine.com/news/katech-...lus-horsepower
reading through it, they're building a 327 whipple...says 4.065 bore on LSX block. but my question is regarding the bore and the heads. says they are running GMPP LS7-LSx heads. says 2.205 intake valves, and replaced the hollow stem exhaust valves with stainless....1.615 exhaust.
when i look up the LS7-lsx heads (6 bolt) says valve sizes are 2.200/1.610, and they also say minimum bore of 4.100.
http://www.chevyhardcore.com/feature...ylinder-heads/
im just trying to figure out how all this went together, and if maybe some numbers are skewed a little....to me...seems like they got the heads (for minimum 4.100 bore) then put in bigger valves...and threw them on a 4.065 bore.....something is off...either the bore isnt 4.065, valves arent that big...wrong minimum bore stated....idk...numbers dont add up.....i can see some small bore LS7's working....dont know what to think i guess....
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05-07-2013, 07:39 AM
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05-09-2013, 11:34 AM
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ok cool, can you post up any information/ pics on this? i imagine its valve reliefs into the block, what do you do for a head gasket and such??? does this pose any problems??? (kinda thinking not, beings it cranked 1100+hp..)
05-09-2013, 12:58 PM
#10
Yes, valve reliefs in the liner. It's very minimal and does not affect the head gasket.
05-13-2013, 07:57 AM
#12
