KF9BD

I am going to change my LS1 intake to the LS6 intake. Will the LS6 throttlebody and MAF mateup to the LS1 plugs and PCM without changing the wiring, plugs, and/or tuning the PCM?

KF9BD

Ok....so noone has information concerning this thread topic???? If those with informaiton aren't replying because it is an old overly done topic and are waiting for me to "do a search" have you tried doing a search with specific? I have searched using many different word combinations with no results that are relevant to matching the throttlebody and MAF electronics to those of the LS1 and/or PCM changes that might be needed. If someone has any information I would really appreciate some help.

nuck

Not sure if what you need is here specifically but give it a look http://www.ls1howto.com/

KF9BD

Outstanding... thanks for the information. Now, do I need to change anything to use the LS6 throttlebody?

RPOZ4Z

I don't believe there is a difference between an LS1 TB and LS6 TB .

gojo

Maybe someone will confirm this, but I believe the internal electronics for the 99 TB are different. It's the same size and flows the same so why change?
The later MAF is bigger, but will need to be calibrated. There are calibration #'s out there. Someone should have them for you.

NEPTUNEBILL

Somebody makes a wiring kit, our tuners can handle the job no prob--depending on your mods you may not notice much diff--the ls6 intake is an improvement over the ls1 intake manifold, I think the TB's are the same and going from the 75mm MAF to the 85mm will not be sotp noticeable--FI cars and my Stroker improved because of the need to flow more--

KF9BD

Thanks for the infor. So, from the information provided the LS1 throttlebody is the same size and has the same flow capabilities as the LS6. Sounds good. It appears the only components that I should consider replacing are the intake and the MAF. My target HP/TQ (at the wheels) is 425/400 on my LS1 N/A motor. I am hoping to acheive that with the following:

LS6 intake and MAF
LG LTs and RT cats into a Z06 catback
LS6 heads
G5X2 or 3 cam
Tune

It is my understanding that the LS6 heads produce a 10.9:1 compression. Can the head been milled to increase compresssion?

Thanks again for your help.

gojo

The LS6 heads produce 10.6CR. I don't know if you can mill them without notching your pistons for the LG cams. Ask LG. I know of a C5 with a 4.11 rear and 90mm Fast and otherwise the same setup as you are planning that makes 427RWHP.
What trans and gears?

mdhmi

CR on the Z's are 10.5:1. You don't need to replace your MAF. I certainly didn't when I had my LS6 intake manifold installed. I remember reading about people who went to the LS6 MAF - no real power gain.

Cheers,

Mark

gojo

cut .005 from deck or Z06 heads = 1cc
cut .007 from LS1 heads = 1cc

9.1:1 = 77.27
9.2:1 = 76.21
9.3:1 = 75.16
9.4:1 = 74.15
9.5:1 = 73.16
9.6:1 = 72.19
9.7:1 = 71.24 (Approximate Combustion chamber of 6.0L heads +/-)
9.8:1 = 70.32
9.9:1 = 69.41
10.0:1 = 68.53
10.1:1 = 67.66
10.2:1 = 66.67 (Stock LS1 Head)
10.3:1 = 65.96
10.4:1 = 65.18
10.5:1 = 64.45 (Stock LS6 Head)
10.6:1 = 63.61
10.7:1 = 62.85
10.8:1 = 62.10
10.9:1 = 61.37 (Approximate Combustion chamber of 5.3L heads +/-)
11.0:1 = 60.66
11.1:1 = 59.96
11.2:1 = 59.27
11.3:1 = 58.60
11.4:1 = 57.93
11.5:1 = 57.28
11.6:1 = 56.65
11.7:1 = 56.02
11.8:1 = 55.41
11.9:1 = 54.81
12.0:1 = 54.20
15.4:1 = 38.00 (Stock C5R Head)
You can figure the milling needed for your desired CR. When TEA did mine they had all my information and CC'd the chambers to get 11 to 1.

Hell-bent

I was going to mill my AFR 205s to somewhere in this range on on my LS1 block. Is this a safe range with 91oct gas or will I get some pinging with a 224 .581 cam? Would I have to mill approx .025 from the AFRs to get just below 11:1?

gojo

Better talk to Tony Mamo at AFR about his heads.

KF9BD

Good information. Hmmm...Looks like I need to consider 5.3L or AFR 205s if I want to get to 11:1.

mdhmi

If you're serious abut AFR heads I would get the 225's.. Look at the 225 vs 205 thread - you will find the 225's out perform the 205's from 3000 RPM all the way to redline.

Mark

KF9BD

Thanks, I'll take a look at them.

Zip Corvettes

I just had the harness made about a weekr two ago. They should have them too me sometime this week. I don't know how much yet but I just paid $29 for one from Pro M and it does not have the IAT sensor input like my harness does. With my harness you will be able to plug in your old MAF and IAT wires into and use the IAT sensor that is in the MAF unit. You will need to call me though as I have not released this to the sales dept. yet.
Justin Abbott
Zip Products
800-962-9632 ext.256