LS1 head swap info
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LS1 head swap info
After kicking richards (99silveradoss) tail all over the track last friday he broke down & cried & brought me the LS1 heads yesterday. I have a couple of questions though. This is going on a 03 4.8 with an ls6 cam in it.
How much do I deck the heads to bring me up to 10.5 to 1 compression?
I am assuming that because the bore is larger on an ls1 & the combustion chamber is larger I should use an ls1 head gasket set. I intended on using a factory set here at the dealership is this ok?
what about my headers, will they work on these heads?
I was just intending on doing some simple cleaning & polishing the intake, exhast, combustion chamber, & bowl area. Is there really a big difference in having them ported being that I intend on using my factory truck intake?
Are there any unforseen problems I might run into?
What kind of power increase can I expect?
How much do I deck the heads to bring me up to 10.5 to 1 compression?
I am assuming that because the bore is larger on an ls1 & the combustion chamber is larger I should use an ls1 head gasket set. I intended on using a factory set here at the dealership is this ok?
what about my headers, will they work on these heads?
I was just intending on doing some simple cleaning & polishing the intake, exhast, combustion chamber, & bowl area. Is there really a big difference in having them ported being that I intend on using my factory truck intake?
Are there any unforseen problems I might run into?
What kind of power increase can I expect?
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I used the 5.3 head gasket myself. I also had the heads worked over by Kittlers which just happens to be in Bossier City. They milled them down, 5 angle valve job and cleaned up the bowls and blended them some. I noticed quite a difference up top but not much down low.
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[QUOTE=CARAZYCUTER 4.8]After kicking richards (99silveradoss) tail all over the track last friday he broke down & cried & brought me the LS1 heads yesterday. I have a couple of questions though. This is going on a 03 4.8 with an ls6 cam in it.
How much do I deck the heads to bring me up to 10.5 to 1 compression?
QUOTE]
As far as decking your not going to be able to mill enough off to even get close to 10.5 to 1 I had about 55 milled off and I think that brought me just a little over stock compression.
Oh and did you really beat Richard?????
How much do I deck the heads to bring me up to 10.5 to 1 compression?
QUOTE]
As far as decking your not going to be able to mill enough off to even get close to 10.5 to 1 I had about 55 milled off and I think that brought me just a little over stock compression.
Oh and did you really beat Richard?????
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2bit .. how much did they charge you for all that?
The ls1 and the heads you have on there flow about the same. If you can get your hands on some ls6 or truck heads though .... they flow considerably better than those 2 heads.
What track are ya'll going to, think ya'll will be there this Fri night? Maybe we could finally meet up at the track if you wanted.
The ls1 and the heads you have on there flow about the same. If you can get your hands on some ls6 or truck heads though .... they flow considerably better than those 2 heads.
What track are ya'll going to, think ya'll will be there this Fri night? Maybe we could finally meet up at the track if you wanted.
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Originally Posted by Flyer
2bit .. how much did they charge you for all that?
The ls1 and the heads you have on there flow about the same. If you can get your hands on some ls6 or truck heads though .... they flow considerably better than those 2 heads.
What track are ya'll going to, think ya'll will be there this Fri night? Maybe we could finally meet up at the track if you wanted.
The ls1 and the heads you have on there flow about the same. If you can get your hands on some ls6 or truck heads though .... they flow considerably better than those 2 heads.
What track are ya'll going to, think ya'll will be there this Fri night? Maybe we could finally meet up at the track if you wanted.
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Originally Posted by Flyer
2bit ..
The ls1 and the heads you have on there flow about the same. If you can get your hands on some ls6 or truck heads though .... they flow considerably better than those 2 heads.
The ls1 and the heads you have on there flow about the same. If you can get your hands on some ls6 or truck heads though .... they flow considerably better than those 2 heads.
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My 5.3 heads are milles .050 and only give me 10.3:1, so sorry to say there is NO way for you to get even close to that compression without pistons. If you mill your stock heads, and have them ported you'd be very surprised at the gains.
For the most part, 5.7 heads are only a good thing if you have boost.
For the most part, 5.7 heads are only a good thing if you have boost.
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That's kinda what I was thinking too Snake. I guess I was beating around the bush an just didn't outright say it.
I still wanna know about the track though .. Hallesville isn't running midnight madness this weekend and I'm dying to get ot a track since I finally got it all running again.
I still wanna know about the track though .. Hallesville isn't running midnight madness this weekend and I'm dying to get ot a track since I finally got it all running again.
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Originally Posted by CARAZYCUTER 4.8
After kicking richards (99silveradoss) tail all over the track last friday he broke down & cried & brought me the LS1 heads yesterday. I have a couple of questions though. This is going on a 03 4.8 with an ls6 cam in it.
How much do I deck the heads to bring me up to 10.5 to 1 compression?
I am assuming that because the bore is larger on an ls1 & the combustion chamber is larger I should use an ls1 head gasket set. I intended on using a factory set here at the dealership is this ok?
what about my headers, will they work on these heads?
I was just intending on doing some simple cleaning & polishing the intake, exhast, combustion chamber, & bowl area. Is there really a big difference in having them ported being that I intend on using my factory truck intake?
Are there any unforseen problems I might run into?
What kind of power increase can I expect?
How much do I deck the heads to bring me up to 10.5 to 1 compression?
I am assuming that because the bore is larger on an ls1 & the combustion chamber is larger I should use an ls1 head gasket set. I intended on using a factory set here at the dealership is this ok?
what about my headers, will they work on these heads?
I was just intending on doing some simple cleaning & polishing the intake, exhast, combustion chamber, & bowl area. Is there really a big difference in having them ported being that I intend on using my factory truck intake?
Are there any unforseen problems I might run into?
What kind of power increase can I expect?
Flyer: We ran at Red River Raceway in north caddo parish. I would like to go to hallsville, but as of right now they got me working a 3-midnight shift Friday You, me & Blake will have to meet up sometime soon though!
twobit: CARAZYCUTER4.8 is just kidding around. He doesn't realize that his 4.8 won't match up to the 5.3, even with a 2200 stall and 3.73 gears! (j/k Blake) His truck does pull good on the top-end.