ms3 + ported 5.3 heads
04-06-2009, 03:27 AM
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A set of factory 5.3 heads won't work, you'll run into PTV clearance issues. The valves need to be "sunk" into the head more to clear without flycutting.
TSP should chime in to explain it better
TSP should chime in to explain it better
04-06-2009, 12:03 PM
#4
even ported ones need to sink the valves. that is not something they do to every 5.3 head. I would guess that you would gain 60 - 80 rwhp through your stall deppending on your supporting mods of course. What size stall is that?
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04-07-2009, 10:48 PM
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that was when it was in the vette, i currently am doing the swap should be buttoned up like a month or so, the guy who owned the vette said he drove it daily no problem and gas wasn't to bad for the hp. that what i was looking for since this car is my daily driver.
that was with stock ls1 intake and injectors, a fast system will help flow numbers and ive read from others that they gained almost 30-40 hp by switching intakes in some applications, of course long tubes and an x pipe will help
that was with stock ls1 intake and injectors, a fast system will help flow numbers and ive read from others that they gained almost 30-40 hp by switching intakes in some applications, of course long tubes and an x pipe will help
04-07-2009, 10:53 PM
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i am goin with a built 4l60e as well with 3800 stall custom converter, i wanted to go with a th400 but since this will be my daily driver, the th400 3 speed will be a hog with the 4:10 gears i have so i need overdrive.
04-07-2009, 11:12 PM
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there is a guy on hybridz with 5.3 prc 2.5 heads and the ms3 cam. Here is the link and the video of him running the car.
http://forums.hybridz.org/showthread.php?t=146785
http://www.youtube.com/watch?v=kny0QF7LU6I
http://forums.hybridz.org/showthread.php?t=146785
http://www.youtube.com/watch?v=kny0QF7LU6I
04-07-2009, 11:29 PM
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that was when it was in the vette, i currently am doing the swap should be buttoned up like a month or so, the guy who owned the vette said he drove it daily no problem and gas wasn't to bad for the hp. that what i was looking for since this car is my daily driver.
that was with stock ls1 intake and injectors, a fast system will help flow numbers and ive read from others that they gained almost 30-40 hp by switching intakes in some applications, of course long tubes and an x pipe will help
that was with stock ls1 intake and injectors, a fast system will help flow numbers and ive read from others that they gained almost 30-40 hp by switching intakes in some applications, of course long tubes and an x pipe will help
there is a guy on hybridz with 5.3 prc 2.5 heads and the ms3 cam. Here is the link and the video of him running the car.
http://forums.hybridz.org/showthread.php?t=146785
http://www.youtube.com/watch?v=kny0QF7LU6I
http://forums.hybridz.org/showthread.php?t=146785
http://www.youtube.com/watch?v=kny0QF7LU6I
04-08-2009, 12:08 AM
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yeah i originally had 2:73 gears in my car, great on the highway , but they will hurt your 60 ft times drastically, id go with 3:73 gears or if your worried even 3:42's will be a huge difference in performance. Ive heard many say the race is won in the first 60ft. which is not always true i know for a fact but just think about it. 
and if you ever think about goin higher than 3:73's , i know one thing, with my 4:10s and especially with a 3800 stall converter, you have to be dedicated to drive it everyday, i wouldnt trade it for the world
and if you ever think about goin higher than 3:73's , i know one thing, with my 4:10s and especially with a 3800 stall converter, you have to be dedicated to drive it everyday, i wouldnt trade it for the world
04-08-2009, 11:29 AM
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i'm ok with giving up a tad until I get taller gears in there. It wont be anytime soonyeah i originally had 2:73 gears in my car, great on the highway , but they will hurt your 60 ft times drastically, id go with 3:73 gears or if your worried even 3:42's will be a huge difference in performance. Ive heard many say the race is won in the first 60ft. which is not always true i know for a fact but just think about it. and if you ever think about goin higher than 3:73's , i know one thing, with my 4:10s and especially with a 3800 stall converter, you have to be dedicated to drive it everyday, i wouldnt trade it for the world
and if you ever think about goin higher than 3:73's , i know one thing, with my 4:10s and especially with a 3800 stall converter, you have to be dedicated to drive it everyday, i wouldnt trade it for the world 
I mean, if I am running 12.3's on the 2.73's now, they can't be hurting me thaaaat much. I'll switch em out sooner or later though
04-08-2009, 08:40 PM
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I have MS3/5.3 stage 2.5 heads from Texas Speed and I just got a fresh dyno sheet @ 439 hp to the wheels with the cutouts open.I just had a 9" moser put in with 4:11's. I'd have to say those gears were my best move yet!The cam loves those gears.
04-09-2009, 12:24 AM
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yeah i love my 4:10s in my camaro thats why i said i wouldnt trade it for the world 
that plus a big converter = some sweet 60ft times haha thats as long as you dont have a problem hookin, like me.....i need to do suspension once i get my motor back in..haha
that plus a big converter = some sweet 60ft times haha thats as long as you dont have a problem hookin, like me.....i need to do suspension once i get my motor back in..haha