Ls1frc is getting upgraded
Melting Slicks
Joined: Jun 2002
Posts: 2,246
Likes: 66
From: Middletown CT
You're upgrading the pushrods correct?
Those injectors are bigger than you need for the mods you listed, but as long as they can tune it, they should be fine. I think you will do better than 410 HP. With similar mods, and a much smaller cam (LPE GT2-3), mine made 403 HP.
There were some threads regarding the use of underdrive pulleys as being the cause of some engine failures. I think it was something about certain brands of underdrive pulleys not doing the job of dampening the harmonic vibrations. I'm not sure what that was all about, but you might want to research it just to be sure. I love it when people tell you not to do something with no explaination why!
Good luck with your project.
Last edited by Greg_E; Jun 15, 2010 at 09:35 PM.
Melting Slicks
Joined: Jun 2002
Posts: 2,246
Likes: 66
From: Middletown CT
Here's one of the threads discussing underdrive pulleys as the possible root cause for timing chains breaking. There are others. Do a search on underdrive pulleys and harmonic balancers in the tech section.
http://forums.corvetteforum.com/c5-t...eas-why-2.html
http://forums.corvetteforum.com/c5-t...eas-why-2.html
Pro
Joined: Aug 2007
Posts: 599
Likes: 39
From: citrus heights ca
i highly doubt you'll pass smog with that cam.
i always suggest getting a 2 piece timing cover.if you ever want to change the cam again it will pay for itself in the time saved in doing the swap.even if you do your own swap.
i always suggest getting a 2 piece timing cover.if you ever want to change the cam again it will pay for itself in the time saved in doing the swap.even if you do your own swap.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
its all in the tune, but like i said before im not worried about it. as long as i can pass the sniffer i will be good when that time comes around again.
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Pro
Joined: Aug 2007
Posts: 599
Likes: 39
From: citrus heights ca
biggest cam i've heard passing the sniffer was a 228/228 114lsa.and he said it barely passed and spent alot of time tuning it.
i've known 2 people not pass with the 224/224 112lsa cam.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
my car is registered in colorado so california emmisions dont mean squat to me. when i smogged my car i was way way way below average. on another note i haven't been able to do much to the car the last couple days since i am recoverying from surgery.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
heres a couple of pics of where i am now and whats going on. I had surgery 2days ago and am forced to chill on the couch with beer in hand lol. not really using a how to just going at it. but once it goes back together i will be using alot of the how to's.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
any opinions on my ptv clearence? heads are prc2.5 ls6 castings, and the cam is a 228/232 114+4 i will check anyway just wouldn't mind some others input. i am using the gm mls head gaskets
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
im gonna bump this Question since im still at a stand still from surgery
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Ok luke Lookin good buddy. Chances are you wont have PTV clearance issues with your current setup even with your current combustion chambeactill good prr size. However, its still good practice to check and it dont take that long to check. Then again if you dont check another way (more expensive way) is to put the whole car back together get it up to normal operating temp and the first on ramp you see pull that ****er to redline from second to 4th 
If after all that you dont hear any really abnormal noises and you do a quick compression check and everything checks out, chances are your clearances are good to go 
Of course I dont condone or endorse that method but what ever works for u i guess. lol
FOR GOSH SAKES CHECK THE PTV WITH CLAY AND A DIAL CALIPER OR RULER IF YA WANT TO GO THE CHEAPER ROUTE
If after all that you dont hear any really abnormal noises and you do a quick compression check and everything checks out, chances are your clearances are good to go Of course I dont condone or endorse that method but what ever works for u i guess. lolFOR GOSH SAKES CHECK THE PTV WITH CLAY AND A DIAL CALIPER OR RULER IF YA WANT TO GO THE CHEAPER ROUTE
Last edited by MVP'S ZO6; Jun 22, 2010 at 04:41 PM.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
Ok luke Lookin good buddy. Chances are you wont have PTV clearance issues with your current setup even with your current combustion chambeactill good prr size. However, its still good practice to check and it dont take that long to check. Then again if you dont check another way (more expensive way) is to put the whole car back together get it up to normal operating temp and the first on ramp you see pull that ****er to redline from second to 4th If after all that you dont hear any really abnormal noises and you do a quick compression check and everything checks out, chances are your clearances are good to go Of course I dont condone or endorse that method but what ever works for u i guess. lol
FOR GOSH SAKES CHECK THE PTV WITH CLAY AND A DIAL CALIPER OR RULER IF YA WANT TO GO THE CHEAPER ROUTE
If after all that you dont hear any really abnormal noises and you do a quick compression check and everything checks out, chances are your clearances are good to go Of course I dont condone or endorse that method but what ever works for u i guess. lolFOR GOSH SAKES CHECK THE PTV WITH CLAY AND A DIAL CALIPER OR RULER IF YA WANT TO GO THE CHEAPER ROUTE
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
I have some of those comp cams checker springs if you wanted to remove your stock valve springs to check ptv clearence... google or you tube i know for a fact theres a good U tube video on checking PTV clearence. HERE YA GO BUDDY! http://www.youtube.com/results?searc...clearence&aq=f
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
hey dude to hell with that GM crossover tube for the LS6 intake just get rid of all those fins on the bottom of the intake. Yes I know what they're for you ante gonna hurt anything. then sell that cross over tube thing and make your money back. (J/K whwhat ever floats ur boat) you know ill be down when I can. I have some of those comp cams checker springs if you wanted to remove your stock valve springs to check ptv clearence... google or you tube i know for a fact theres a good U tube video on checking PTV clearence.
HERE YA GO BUDDY! http://www.youtube.com/results?searc...clearence&aq=f
I have some of those comp cams checker springs if you wanted to remove your stock valve springs to check ptv clearence... google or you tube i know for a fact theres a good U tube video on checking PTV clearence. HERE YA GO BUDDY! http://www.youtube.com/results?searc...clearence&aq=f
Melting Slicks
Joined: Jun 2002
Posts: 2,246
Likes: 66
From: Middletown CT
If you already have an 85mm screened MAF there is no need to buy a LS6 screenless MAF. My understanding is that the two have a slightly different calibration, but if you want to run a screenless MAF the screen can be removed, and your tuner can make the necessary adjustments.
I don't know how much the screen affects airflow, but depending on your choice of CAI, it can be benificial. Too much turbulence across the sensor can result in inaccurate measurements and codes being set.
I'm not certain, but I think all the newer gen engines have a screened MAF, so GM obviously thinks that's a better way to go.
Edit:
Your profile says you have an '99 FRC which had a 78mm MAF, so I assume you already upgraded to an 85mm MAF at some point.
I don't know how much the screen affects airflow, but depending on your choice of CAI, it can be benificial. Too much turbulence across the sensor can result in inaccurate measurements and codes being set.
I'm not certain, but I think all the newer gen engines have a screened MAF, so GM obviously thinks that's a better way to go.
Edit:
Your profile says you have an '99 FRC which had a 78mm MAF, so I assume you already upgraded to an 85mm MAF at some point.
Last edited by Greg_E; Jun 28, 2010 at 09:51 PM.