When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
Proper Prior Planning Prevents **** Poor Performance, and a quick turnaround time too. 1 week of downtime is awesome.
As you know, I started working with Joe on this build back in February, but didn't want the work done until after my Silver State run last weekend (1 second off for 90 miles in the 150 class = 9th of 16, not good this time). Builders seldom get that much advance notice, but it worked for me and my use of the Z.
CPR does so many LS7 builds, they have a set of spare heads that get built up in advance. Joe indicated he will probably get an additional spare set of heads to make sure the head work is not the critical path of the vehicle down time. Before I talked to Joe, I was expecting about 6 weeks and that would have been OK, but when he indicated about a week downtime I was very pleased. During the past two months Joe and I talked about various parts in my build and a couple weeks ago one of his guys (Jeff) called me saying they had all the parts except the X-pipe and wanted to confirm I was bringing it down when I brought the car in (I was). I agree PPPPPPP.
Affordable Powder Coating in the Valley did the headers.
I went with 1 7/8" headers as they should be adequate for my build and I don't anticipate going bigger in the future.
I know Unreal does not like the Phadt headers (don't know if that carries over to the AFE/Phadt's I have), But Joe seemed fine with the AFE built Phadt headers and sells them from his shop. I was interested in the possible mid-range torque benefits. I guess I'll have to see the dyno runs and compare with similar builds going on now at CPR for final results.
I've seen it time and time again kooks/arh/lg pick up power everywhere over pfadt design. So paying extra for a under-performing header just doesn't seem smart to me.
I've seen it time and time again kooks/arh/lg pick up power everywhere over pfadt design. So paying extra for a under-performing header just doesn't seem smart to me.
Car looked good. Just picked mine up from CPR.
Did you re-dyno your engine after the work?
I got a call today and my motor mounts were leaking (no surprise). They will replace them with billet mounts if they won't create interference between the top of the firewall and the new MSD intake or with new stock mounts if they would.
Oops, just saw your post and no dyno runs indicated, thanks.
I've seen it time and time again kooks/arh/lg pick up power everywhere over pfadt design. So paying extra for a under-performing header just doesn't seem smart to me.
Car looked good. Just picked mine up from CPR.
What dyno comparisons do you base your statement on?
I dumped ARH for Pfadt and got a nice boost in torque under 4500 - which is what I wanted for the track.
Maybe mine is the exception, or just an issue with "everywhere".
I lost 4 or 5 at the top, but gained almost 20 ft/lb of torque where I wanted it.
BTW, the ARH headers burnt thru both of my brake lines at left front header tube.
Ultimately my fault for never checking all clearances after the install, took about 2 yrs.
They both went at the same time, luckily the day after I was on the track.
What are the rest of your supporting mods? I'm adding Pfadt 1 7/8 headers to my H/C/I package and was expecting lesser gains than if I had gone with ARH. I was able to get a great deal on the Pfadt's which is why I'm using them.
What are the rest of your supporting mods? I'm adding Pfadt 1 7/8 headers to my H/C/I package and was expecting lesser gains than if I had gone with ARH. I was able to get a great deal on the Pfadt's which is why I'm using them.
WCCH Stage 2 porting with .030 milling and CHI bronze guides
Katech 110 cam
Ported Fast
Ported stock TB
Halltech 103 w/beehive
Pfadt 1 3/4 headers
Check the clearance between the right tubes and starter/solenoid.
Heat Insulation for the starter/solenoid is a good idea with any headers.
WCCH Stage 2 porting with .030 milling and CHI bronze guides
Katech 110 cam
Ported Fast
Ported stock TB
Halltech 103 w/beehive
Pfadt 1 3/4 headers
Check the clearance between the right tubes and starter/solenoid.
Heat Insulation for the starter/solenoid is a good idea with any headers.
My build is not that dissimilar.
Stage 4 AHP heads ported and milled .030 Moldstar 90 guides
Custom cam similar to a 116. Little bigger though. ESP lobes.
Ported MSD
Ported stock TB
Halltech 103 w/beehive
Pfadt 1 7/8 headers
I've heard of the starter clearance issues. I did get the headers coated to help with heat but still plan to install a heat shield if I can find one that fits.
Ya stupid mustang we did a blower and fuel system on before your's had a bad pump out of the box so we had to quickly pull that back out so that car could get tuned and go bye bye lol. Mario who is doing your car did the mustang so he lost a day there sadly. Clutch is all in and done and car will be up and running thur evening. I'll upload an idle video for you on here.
05-19-2016, 12:13 PM
). Good luck and thanks in advance for sharing with the forum! 
