Ls1frc is getting upgraded
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
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.
Melting Slicks
Joined: Jun 2002
Posts: 2,246
Likes: 66
From: Middletown CT
You would also need the adapter harness and the correct size air bridge and coupler, so there is some addditional expenses involved. I think the 78mm MAF can support the mods your doing, so it probably not absolutely necessary. If your looking at buying a used CAI, you will find that most that come up for sale are for the the larger 85mm MAF so the upgrade might give you more options in that department.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
Drifting
Joined: Apr 2008
Posts: 1,510
Likes: 15
From: Ga
You should be above that mark. I have the same mods less the heads on a 2000 Z51 and I am putting down 405 RWHP and 403RWTQ. I bet you will be in the 420-440 range.
Alright i know how much everyone enjoys reading through these so I thought i would contribute my own. A little background for ya I purchased my Vette about a year and a half ago I did a baseline dyno of 320 and 328 not to bad, got called away to do my military dutied I have since returned from my Navy duties in the far off land of Maine. It is time to modify my 99 and change things up.
heres what i got coming my way so far
I have been busy spending money! got some 1 3/4 Long tubes with a catted xpipe, went to Texas Speed and bought a heads and cam kit from them consisting of the PRC Stg2 LS6 heads and a 228/232 114+4 cam,FAST 78mm intake, mti 25% UD pully, melling hi flow oil pump, ls2 timing set already have a vararam CAI, LS6 intake, and z06 ti catback. then got some bilstien sport shocks (Rather than getting the Z06 rear brake ducts). powerwise i have been told i should be around 400-410 to the wheel after tuning. (which will be done by Ryne at CMS)
Please chime in and let me know what you think, and offer wisdom as i progress i will update with Pics
heres what i got coming my way so far
I have been busy spending money! got some 1 3/4 Long tubes with a catted xpipe, went to Texas Speed and bought a heads and cam kit from them consisting of the PRC Stg2 LS6 heads and a 228/232 114+4 cam,FAST 78mm intake, mti 25% UD pully, melling hi flow oil pump, ls2 timing set already have a vararam CAI, LS6 intake, and z06 ti catback. then got some bilstien sport shocks (Rather than getting the Z06 rear brake ducts). powerwise i have been told i should be around 400-410 to the wheel after tuning. (which will be done by Ryne at CMS)
Please chime in and let me know what you think, and offer wisdom as i progress i will update with Pics
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
just have a little more to go and then i can just clean, clean, clean. I do have a question though ok on the fuel injector harness there are these little blue gaskets one is missing does this need to be replaced, and if so where can i get one?
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ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Instructor
Joined: Feb 2010
Posts: 108
Likes: 0
From: Roseville California
Hope your new mods give you that WOW feeling you get for a while the same way we all do when we get our first Vette. ENJOY!!!! 
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
damn i finally got the heads off lol it looks bare in the engine bay. i found that gasket thing it fell in one of the intake ports on the head. hopfully i can pull the pully and front cover off tomorrow. duty today
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
well i just pulled one of the new heads out of the box and noticed one of the corners is smashed slightly. will this affect the head sealing with the head gasket? This is probobly from shipping because i see tear marks on the outside of the box I will have to get ahold of TSP and see what can be done or if its really that bad of damage. Damn UPS drivers!!!! also went to take the pully bolt loose and HOLY HELL it was already loose I had my pully move and the belts come off about a year and a half ago when the balancer bolt worked itself loose and i had the dealership "repair" it. They told me they replaced the bolt and had the car for 2 days now i think they just tried to retorque the original bolt. if i wasn't doing these mods i wonder how much longer i would have had to go before this went sour again. I really hope the head can be repaired or replaced. heres some pics. when scraping the old gasket off how do you deal with the water jackets in the block? I am having one hell of a week!!
and a couple of my motor with the heads off do you think i should clean those pistons ....I do.
and a couple of my motor with the heads off do you think i should clean those pistons ....I do.
Last edited by stryderss; Jul 14, 2010 at 04:17 AM.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
Well i talked with Matt from TSP he said that i could use a file and a straight edge and fix it so thats what im gonna do, its just some cosmetic damage. I can see that its not in any critcal areas at all. man that graphite gasket is gonna kick my ***. i will get back to it when i get home tomorrow afternoon.
Last edited by stryderss; Jul 15, 2010 at 04:32 AM.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
Looks good. I think you'll make more than 420 to the ground. While your in there I would upgrade your lifters to the LS7's. They are about $120-$130 from GMPartsHouse.com. While your at it get the LS2 lifter trays they're about $40. I drilled holes in the top of my trays to help oil drain to the pan. You can do a search on this.
I agree with the Trunion Mod as well. I picked up a set from HinsonSuperCars.com for around $120.
You WILL be needing a clutch soon. Mike Yeager at East Coast Performance in South Carolina has a smokin' deal on LS7 clutch kits. I highly recommend Mike for advice and buying parts. His customer service is 2nd to none.
Good Luck with you build!!
I just read that last post...Send the head back. You paid for quality, demand it!!!
I agree with the Trunion Mod as well. I picked up a set from HinsonSuperCars.com for around $120.
You WILL be needing a clutch soon. Mike Yeager at East Coast Performance in South Carolina has a smokin' deal on LS7 clutch kits. I highly recommend Mike for advice and buying parts. His customer service is 2nd to none.
Good Luck with you build!!
I just read that last post...Send the head back. You paid for quality, demand it!!!
Last edited by CamminC5; Jul 16, 2010 at 03:20 PM.
Thread Starter
Burning Brakes
Joined: Jun 2008
Posts: 838
Likes: 5
From: San Diego CA
well the head is alright i filed it down and hit it with some fine sand paper so its good to go. i already have the upgraded lifters, and i might check into the lifter trays. If i make more than 420 i will be real happy. Yeah i got to wait a bit on the clutch so i will do my best not to beat on it when im finished with the heads and cam. I was thinking more of a spec 2+ or a centerforce DF. Thanks for the comments and recommendations.