running 3.1 pully ( magnacharger ) professional help
hey guys ,,, i am running 3.1 pully ,,, instead for 3.4 ( 5 psi )
but my car is posting 5 psi only !!!
any ideas because of what ?
__________________ C6 Z51 Package M6
Procharger F1C | Custom camshaft l | AFR 72CC heads | 403 Stroker
FAST 92 MM intake | Wet Nitrous Direct Port ( fogers ) | Headers kooks 1 7/8
X pipe + cutback C6 Zo6 | F1-C 11PSI | Ram Twin Disk | Custom fuel System | 75 Shot if Dry Nitrous on F1-C cooler | ARP STUD | Moizer water Pump | Flip Drive | FAST 92 has killed me by leaking air and losing Boost !
RWHP 720 | RWTQ 725 On Dyno Jet ( with Drifiting on dyno)
Last edited by vvette_c6; 02-16-2008 at 10:29 AM.
Reason: need help
__________________ C6 Z51 Package M6
Procharger F1C | Custom camshaft l | AFR 72CC heads | 403 Stroker
FAST 92 MM intake | Wet Nitrous Direct Port ( fogers ) | Headers kooks 1 7/8
X pipe + cutback C6 Zo6 | F1-C 11PSI | Ram Twin Disk | Custom fuel System | 75 Shot if Dry Nitrous on F1-C cooler | ARP STUD | Moizer water Pump | Flip Drive | FAST 92 has killed me by leaking air and losing Boost !
RWHP 720 | RWTQ 725 On Dyno Jet ( with Drifiting on dyno)
any body knows what should i expect Psi when i run 3.1 on C6 Z51 364 engine ?
__________________ C6 Z51 Package M6
Procharger F1C | Custom camshaft l | AFR 72CC heads | 403 Stroker
FAST 92 MM intake | Wet Nitrous Direct Port ( fogers ) | Headers kooks 1 7/8
X pipe + cutback C6 Zo6 | F1-C 11PSI | Ram Twin Disk | Custom fuel System | 75 Shot if Dry Nitrous on F1-C cooler | ARP STUD | Moizer water Pump | Flip Drive | FAST 92 has killed me by leaking air and losing Boost !
RWHP 720 | RWTQ 725 On Dyno Jet ( with Drifiting on dyno)
Need more info.........are you running headers? changed cam? What 3.1" pulley are you running?
Headers and a blower cam will lower your boost........the stock 3.4" is good for 5-5.5 lbs with stock exhaust manifolds. I've also seen some low grade pulleys that are not the actual diameter that's stamped on them. Also, have you tried another boost gauge (to make sure yours is accurate). Even with headers and a change in cam.....I think you should be making 6-6.5 lbs with a 3.1"
Need more info.........are you running headers? changed cam? What 3.1" pulley are you running?
Headers and a blower cam will lower your boost........the stock 3.4" is good for 5-5.5 lbs with stock exhaust manifolds. I've also seen some low grade pulleys that are not the actual diameter that's stamped on them. Also, have you tried another boost gauge (to make sure yours is accurate). Even with headers and a change in cam.....I think you should be making 6-6.5 lbs with a 3.1"
i am running headers 1 7/8 kooks long tube
my camshaft now is blower camshaft duration intake 222 exhust 228
Lift intake 566 exhust 571 lope 114
camshaft ls1 speed for blower
SC2 224 232 .581 .595 114 SC2
i tried the boost gage in another car and it was posting fine
now i will change my adjustable tensioner pulley
but thats good
i had the answer for my question which is i should expect 6 to 6.5 on 3.1 pulley
please guys i will start a new thread and i really need help and please guid me for a professional person who can help me
many thanks
__________________ C6 Z51 Package M6
Procharger F1C | Custom camshaft l | AFR 72CC heads | 403 Stroker
FAST 92 MM intake | Wet Nitrous Direct Port ( fogers ) | Headers kooks 1 7/8
X pipe + cutback C6 Zo6 | F1-C 11PSI | Ram Twin Disk | Custom fuel System | 75 Shot if Dry Nitrous on F1-C cooler | ARP STUD | Moizer water Pump | Flip Drive | FAST 92 has killed me by leaking air and losing Boost !
RWHP 720 | RWTQ 725 On Dyno Jet ( with Drifiting on dyno)
There are plenty of professionals here to help, no need to start a new thread. I would suspect that your cam selection along with the headers and free flowing exhaust might have some impact on your boost levels.
A few questions that I need answered:
1) Did you use the pinning kit for the balancer?
2) Where are you getting your boost readings?
3) Are you using a factory balancer or an after market "under drive" pulley?
4) Are you sure you are using the proper pulley? As stated above, some "after market" pulleys are not to exact specifications.
A 3.1 pulley on a stock 364 CI motor will yield approx 5-6 psi with the MP112, more than likely your cam/header selection is causing the boost to read lower. What you need to remember is you are still moving the same amount of air, just more efficiently. Boost is a measurement of restriction.
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running 3.1 pully ( magnacharger ) professional help
