Planning CA legal LS1 build
04-14-2013, 08:37 PM
#21
Staging Lane
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Normally I would say go boost but your budget is 6K and that might be a little tight. Well for starters your intake setup. The only legal option is a K&N FIPK II kit, you could run an air lid and switch back to stock for smog, but the K&N is legal all the time. For an intake manifold you have 2 options. An SLP LS6 intake is CARB approved because it has an EGR provision. Also the FAST 102 is CARB approved. As far as heads go stay stock or get the AFRs, honestly I would just get 243s and grind the casting #s off. For a cam there are a number of CA grinds or you can have one specd out. For exhaust, get some short tube headers, I believe edelbrocks are the only ones approved. For a catback thats up to you, all are legal with a proper muffler
For shorties flow better than stock manifolds?
04-14-2013, 09:53 PM
#24
If you could swing AFR's and a decent cam that would be good. If not 243 heads and cam that's not too hot. In the end a good tune is really important.A fast intake is a lot of money for stock cubes. At least a ls6 intake looks like the stock one. The key in calif. is passing the tail pipe and not having them look too close under your car.
My car didn't pass smog with 317 heads because of my 2.08 intakes and grappy tune.That size intake is too big. They run better with stock 2.00 or 2.02.size.Even though they are milled to 64cc with a lot of port work.
I had this stuff done by a guy before I knew what I know now.At least you are asking people on this forum before you buy a bunch of parts.That's really important to get the right combo.
My car didn't pass smog with 317 heads because of my 2.08 intakes and grappy tune.That size intake is too big. They run better with stock 2.00 or 2.02.size.Even though they are milled to 64cc with a lot of port work.
I had this stuff done by a guy before I knew what I know now.At least you are asking people on this forum before you buy a bunch of parts.That's really important to get the right combo.
04-15-2013, 02:13 AM
#26
TECH Senior Member
From personal experience, (-6) overlap passes in Cali if installed properly. (-4>-2) will pass but is more tune dependent.
The size of the intake valve is not relative and that issue is tune related.
The size of the intake valve is not relative and that issue is tune related.
04-15-2013, 02:14 AM
#27
For your build, the FAST would probably not net you much more than a LS6. As stated the SLP LS6 is the quick way to make it legal. And yes shorties are an upgrade over stock on 98-99
04-15-2013, 11:18 AM
#28
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06-18-2013, 11:34 PM
#29
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Here's what I am thinking so far.
LS1 stock short block rebuilt
Tick Performance LS1 Emissions cam (218/230 .59x"/.60x" LSA 117+2)
AFR 210s with 66cc combustion chambers
SLP LS6 intake (not sure if that would need any work like port matching)
Ported stock throttle body
California legal shorty headers
New cat back (I like the Borla)
What kind of power range should I see with a build like this?
LS1 stock short block rebuilt
Tick Performance LS1 Emissions cam (218/230 .59x"/.60x" LSA 117+2)
AFR 210s with 66cc combustion chambers
SLP LS6 intake (not sure if that would need any work like port matching)
Ported stock throttle body
California legal shorty headers
New cat back (I like the Borla)
What kind of power range should I see with a build like this?
06-19-2013, 01:18 AM
#30
Here's what I am thinking so far.
LS1 stock short block rebuilt
Tick Performance LS1 Emissions cam (218/230 .59x"/.60x" LSA 117+2)
AFR 210s with 66cc combustion chambers
SLP LS6 intake (not sure if that would need any work like port matching)
Ported stock throttle body
California legal shorty headers
New cat back (I like the Borla)
What kind of power range should I see with a build like this?
LS1 stock short block rebuilt
Tick Performance LS1 Emissions cam (218/230 .59x"/.60x" LSA 117+2)
AFR 210s with 66cc combustion chambers
SLP LS6 intake (not sure if that would need any work like port matching)
Ported stock throttle body
California legal shorty headers
New cat back (I like the Borla)
What kind of power range should I see with a build like this?
06-19-2013, 10:21 AM
#31
Staging Lane
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With the AFR 210s you could run less exhaust duration, and in turn run a tighter lsa, which would net a lower power band with better low-end power. I'd consider a 218/226 115 lsa +3, it'll have -8* overlap so passing smog should be a problem. I'd also recommend having the heads milled to 62cc for even more power, especially since you should have good PTVC.
06-19-2013, 10:58 AM
#32
Stick with the stock rockers and do the trunion upgrade. That will be more then enough for your needs.
Agree no need to go that wide on the exhaust split, a 220/224 would be a nice cam to have and should still pass emissions.
Mill the crap out of the heads to get compression up, also get a tight quench with some thinner cometic head gaskets. That increase power and does not increase smog to make you fail.
Agree no need to go that wide on the exhaust split, a 220/224 would be a nice cam to have and should still pass emissions.
Mill the crap out of the heads to get compression up, also get a tight quench with some thinner cometic head gaskets. That increase power and does not increase smog to make you fail.
06-19-2013, 11:39 AM
#33
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Stick with the stock rockers and do the trunion upgrade. That will be more then enough for your needs.
Agree no need to go that wide on the exhaust split, a 220/224 would be a nice cam to have and should still pass emissions.
Mill the crap out of the heads to get compression up, also get a tight quench with some thinner cometic head gaskets. That increase power and does not increase smog to make you fail.
Agree no need to go that wide on the exhaust split, a 220/224 would be a nice cam to have and should still pass emissions.
Mill the crap out of the heads to get compression up, also get a tight quench with some thinner cometic head gaskets. That increase power and does not increase smog to make you fail.
The only reason I was going to use the Tick cam is they made it to pass smog.
I see a lot of people going with .040" gaskets. Should I use a similar thickness?
06-19-2013, 01:02 PM
#34
Yes the thinner gaskets will only make you performance better, but it would be a good idea to get the decks milled to insure a perfect seal with the thinner gaskets.
Last edited by 99Bluz28; 06-19-2013 at 01:10 PM.
06-19-2013, 01:07 PM
#35
Stick with the stock rockers and do the trunion upgrade. That will be more then enough for your needs.
Agree no need to go that wide on the exhaust split, a 220/224 would be a nice cam to have and should still pass emissions.
Mill the crap out of the heads to get compression up, also get a tight quench with some thinner cometic head gaskets. That increase power and does not increase smog to make you fail.
Agree no need to go that wide on the exhaust split, a 220/224 would be a nice cam to have and should still pass emissions.
Mill the crap out of the heads to get compression up, also get a tight quench with some thinner cometic head gaskets. That increase power and does not increase smog to make you fail.
06-19-2013, 02:24 PM
#36
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I was planning on having the block machined so I would have the block and heads milled.
06-19-2013, 06:07 PM
#38
more then a 4 degree split differance in the intake/exhaust duration timing.could you maybe build a 383 ls1 stroker and use the correct GM head castings ?get the correct legal heads ported .
06-19-2013, 06:29 PM
#39
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