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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
Do some research on the forum, look **** up on the interwebs, when you feel like you seen enough on LS7 heads(fixing yours) or an entirely new set. Pick a top 3 of builders or brands, actually call those three shops or manufactures, let them know your goals and intentions take in what advice or suggestions they offer, swirl that around in your brain for a bit. One of those three you chose will set themselves apart making your decision easy! I did this exact routine. My 3 choices were AHP/Vengeance/LME. I wouldn’t have been wrong going with any of those companies. They all make dope products, parts and tune fast vettes. All three had quick response times and were extremely professional and knowledge way beyond my understanding. AHP imo opinion went just a little further on custom service and for my wants/needs/goals fit perfectly. Lots of amazing shops and companies do sick work on LS7’s, just do some looking around and actually pick up the phone and call these guys, that I can’t stress enough!!! Good luck bro!🇺🇸
My bone stock 2009 Z06 dropped a valve at 5,700 miles. AHP built me a brand new LS7. Stage 4 heads with mold star 90. Bunch of other go fast parts. I just finished putting the new engine in the car. I’m hoping to have a final tune done next week.
New to me 2012 Z06 with 14K miles. Took heads off myself and shipped to AHP. PM guides, reused my valve springs. Stock cam and stock California car. Fast enough for me, really, I mean it...
Did you get a tune after the mil? Is it necessary? I never asked about a quantity of extra hp on a .020 or .030 mil.
The short answer is yes it is necessary, the extra compression will lead to increased detonation(knock retard)
I’d suspect with tune the milling is good for about 15hp by itself - but new pushrods will be required which adds to the cost/process.
The short answer is yes it is necessary, the extra compression will lead to increased detonation(knock retard)
I’d suspect with tune the milling is good for about 15hp by itself - but new pushrods will be required which adds to the cost/process.
I know that JesC6Z has experience with the push rods with milled AHP heads as well as tuning on a car that is pretty close to stock.
The short answer is yes it is necessary, the extra compression will lead to increased detonation(knock retard)
I’d suspect with tune the milling is good for about 15hp by itself - but new pushrods will be required which adds to the cost/process.
Better safe than sorry so a tune is always best. Even tho my tuner told me my AFR was rich. Rich afr more likely no detonation. Either way it’s best to calibrate it for sure. Indeed the pushrods should be measured to run the correct size. Comp cams pushrod checker was the perfect tool.
Originally Posted by 03BlkZ
I know that JesC6Z has experience with the push rods with milled AHP heads as well as tuning on a car that is pretty close to stock.
Appreciate the help via text when I was checking for pushrod length my friend
Originally Posted by Bryan91SE
Did you get a tune after the mil? Is it necessary? I never asked about a quantity of extra hp on a .020 or .030 mil.
Even tho my afr was rich on the Z I would recommend it Bryan. Better safe than sorry. The engine is too expensive to take that chance. Are you in Texas?
I wanted heads fixed with some extra hp but didn’t want to go too crazy. Had them mil .020 and ported. Put a halltech mf108 on with a street/dyno tune. No cam and stock exhaust. Car made 512/448.
Thanks for all the replies. I'm going to fix the heads, get a tune and keep the rest stock. I don't see myself wanting/needing more after this is done.
Pulled heads at 3400 miles. Had LMR pull the heads and send them to LME. Had new Manley dual springs, CHE guides and rockers, Ferrea hollow exhaust valves.
I also added a mild Crane cam, headers, and B&B Fusion III exhaust.
08Z already had Akro Evo full system and K&N intake when I purchased it. I went with AHP package 4 heads, hardened powder metal valve guides, Ferrrea SS exhaust valves, milled heads .020, street ported heads. I added B&B headers while I had it opened and kept stock cam.
AHP stage 4 package plus other ****
what comes with the standard stage 4 package I’ve put (S4P) beside, everything else listed were optional upgrades or additions.
High velocity street port
.010 mil(S4P)
chamber softening on exhaust side
MS90
BTR Platinum(.660 lift with Ti/retainers)
CHE trunion upgrade
Johnson 2110 slow leak down lifters
LS7 rockers
Ferrea 2042 hollow SS
Polished Ti intake valves(S4P)
performance valve job(S4P)
New vinton valve seats(S4P)
all new gaskets, MSD plugs wires(S4P) w/insulators
NGK BR7EF spark plugs(these can vary)(S4P)
ARP Head studs
2007 z06, 55k miles.
AHP package 4, BTR dual valvesprings and titanium retainers, the CHE trunions, street port and a .030 mill, push rods.
ahp 112 cam and lifters
ported intake manifold and throttle body
kooks 1 7/8 headers and x-pipe w/cats
still working on:
suspension bushings
coil over shocks
ball joints
heim jointed links
brake pads, 1 piece and rotors
ss brake lines
and whatever else that i haven't gotten to yet
AHP stage 4 with street porting, 1511 springs, MS90 guides and new lifters. Since they were in there anyways, I also had some Katech parts installed along with a ported MSD intake. Thank you GMPP and Abel Chevrolet.
Replaced my heads at 43k miles with a set from Frankenstein Engine Dynamics. New valves, guides, springs, etc, no porting or milling. Custom ground cam, CAI, AR long tubes and X pipe, and tune
Got new GM Performance heads via warranty. Had WCCH check them out and do minor repair. All stock components with new lifters. Sounds and feels smooth .....
09-25-2018, 10:41 PM
