Houston999

iTrader: (3)

why does it peak too early?the g5x3 peaks at 6700 most of the time

98SS2836

iTrader: (6)

Mine peaks at 6400-6500 carrys to about 6800.
What springs?

Lythropus

iTrader: (13)

I was expecting more...atleast 430's. What's the compression?

Houston999

iTrader: (3)

the car is an auto , springs are the same that came with the AFRs

Lythropus

iTrader: (13)

still low, what's the compression...they are out of the box afr's...no milling?

98SS2836

iTrader: (6)

you need and upgraded spring if they are stock AFR springs. There springs are good up to .600 lift.

BrianC98Z28

iTrader: (11)

like stated above. you need to upgrade your springs and also the AF is leaner than id like it. Are the heads milled?? Is the manifold ported??

Houston999

iTrader: (3)

out of the box heads and 90/90 , and the car is a holden 4 door

bad95killer

Try to get new Dual springs & i'm not gonna say too lean but ya should feed her with more fuel guys & play with timing table

peace

98SS2836

iTrader: (6)

Im not going to say lean either my car makes more power at 13.4 than 13.0 I try to run it at the track 12.5.

allngn_c5

iTrader: (3)

You look to be peaking around 6250 rpms according to your graph. Got a little fall off then a slight rise then another falloff. Don't know about you peaking at 6700 rpms. How many miles on those valve springs??

Houston999

iTrader: (3)

i mean other g5x3 cams peak at 6700, mine peaks like you say at 6250 , the springs are new without of the box AFR.

98SS2836

iTrader: (6)

You need upgraded springs with out of the box AFR's. Right from there web site:
Note:
Hydraulic roller cams in "LS" Gen III engines typcially experience valve float at 6600-6800 RPM's. If you plan on running over .600 gross valve lift and/or 6600 RPM, AFR suggests you upgrade your springs to AFR part #8019. Our upgrade spring has higher seat and open pressures (155/410+) to better reduce the risk of valve float in more aggressive applications. AFR also recommends the use of Crane Billet lifters in conjunction with our 8019 spring upgrade.

G5X3 234/242 .600/.610= need comp 921's or AFR 8019. Patriot Golds etc....

ss2002

Hey

this is all parts on the car:

98-02 LS1 /1996 LT4 Breather
2004-2005 160* T-Stat
AFR Mongoose 205cc FULLY CNC 66cc Chambers COMPLETE
ARP Header Stud Kit, LS1,LS6, 5.7L & 6.0L
ARP High-Performance LS1 "Cracked Rod" Connecting Rod Bolts
ARP LS1 BALANCER BOLT
ARP LS1 Hex Head Bolt Kit
ARP torque convter bolts 113-230-7305 -TR
ASP CRANK AND ALTERNATOR SET LS1
cam bearings
Chrome Moly Pushrods 7.400 (Stock Length)
COMETIC HEAD LS1 GASKETS 3.910 BORE .040"
COMP HIGH ENERGY ROLLER LIFTERS
Diamond Pro-Select Piston Rings, 3.905 Bore, 1.5 - 1.5 - 3.0 mm
Drive Belt for use with underdrive pulley
F-body & 1999-up GM Trucks w/ 4.8, 5.3 or 6.0L
Federal Mogul LS1 Main Bearing Set, Competition Series Super Duty Alloy, 3/4 Groove (STD)
Federal Mogul LS1/SBC Rod Bearing Set, Competition Series, Super Duty Alloy, Chamfer (STD)
G5X3 - 114 Cam
Isky Piston Notching Pilot, 5/16" or 8mm Valve Guide
Isky Piston Notching Tool, 2-1/8" Diameter
MSD LS1 8.5mm Super Conductor Plug Wires
NGK TR-55-6 Set of 8 Spark Plugs
Nitto 555 245-45R17 Radials (Pair)
SLP Double Roller Timing Set
SLP GTO Linelock
SLP Heavy Duty Oil Pump
Stainless Works GTO Headers - Off Road
TCI Automotive SFI Approved LS1 Flexplate, 1998-2002 LS1
valve spring upgrade for AFR heads
Vigilante 9.5" 5-Disc Torque Converter 4L60E 3200

ss2002

this is the last scans on the dyno by EFI :

411HP Was in Locked TC

waterbug1999

iTrader: (3)

Mine seemed to have peeked at 6500...

ringram

Whats your DCR with that setup? Have you got the cam timing set right?

Frost

iTrader: (45)

Looks good but you have tuning to do yet... Try it out, but 12.8-13.2 (usually the low side of that) usually yields the best. You can get that AFR to be a straight line from left to right. It definitely needs some fuel down there early on in the pull; that's knock territory. I bet it feels f---n strong on the street right the way it is though.

Xtnct00WS6

iTrader: (8)

With 66cc's, I'd say you should mill those to at least an 11:1 static compression. You're leaving some serious power on the table with 66 cc's.

ExceSSive

iTrader: (13)

I agree...60 - 62 cc chamber would improve your gains 20+ and you need some 8019 or 921 springs as mentioned earlier (could be causing some bind if you don't have the upgraded spring) and shortening you curve maybe, and more fuel down low will probably pick up some torque. Just my $0.02.

Jon