backtobirds
Registered User
After the rebuild, diagnosing what turned out to be a bad crank sensor mount, and exploding the trans on the test drive around the block I have the car back together and driveable. Also got a Moates Quarterhorse for tuning. Props to those guys, that is probably the best EEC-IV tuning product I have ever used. Plenty of fun to drive and it sounds like a big block, but I can't get any boost out of it.
A little background, new block, rotating assembly, SSM heads, ported intake, MPX case and plenum, 10% crank pulley, 10% jackshaft, 10% blower pulley, cam, and long tube headers. So I would expect some boost but it barely creeps to maybe half a pound. So, for what it might be:
Head gaskets are of course new, ARP head studs, 99 block so the threads are countersunk an extra inch for better gasket retention. No evidence at all of gasket failure, and it showed 160 to 170 psi on a compression tester.
Intake-torqued, retorqued, dry and thread-locked.
I am using teflon gaskets on the blower outlet, return plenum-to-intake manifold, and return tube-to-return plenum. Turbonetics silicone couplings for the FMIC piping.
Put the blower together with anarobic gasket maker and torqued everything. I had a problem with the bypass plate sticking, so I sent it back to Charles and he opened it up a little to free it.
Still no boost. The car pulls 18-20 inHg at idle and I sprayed all the connections and gasket areas with brake cleaner, as well as the intercooler. I even did all this with the bypass manually closed as well, but came up with nothing. Just to double check my butt dyno and boost gauge I took a datalog. The MAF follows the throttle position sensor just fine until the TP is opened up, but then it only shows the engines natural air capacity and no more. Score one for the butt dyno I guess. Anybody have an idea what might be going on?
Here is the datalog if anybody wants to see.
http://www.mediafire.com/?xciiygy1wyl
A little background, new block, rotating assembly, SSM heads, ported intake, MPX case and plenum, 10% crank pulley, 10% jackshaft, 10% blower pulley, cam, and long tube headers. So I would expect some boost but it barely creeps to maybe half a pound. So, for what it might be:
Head gaskets are of course new, ARP head studs, 99 block so the threads are countersunk an extra inch for better gasket retention. No evidence at all of gasket failure, and it showed 160 to 170 psi on a compression tester.
Intake-torqued, retorqued, dry and thread-locked.
I am using teflon gaskets on the blower outlet, return plenum-to-intake manifold, and return tube-to-return plenum. Turbonetics silicone couplings for the FMIC piping.
Put the blower together with anarobic gasket maker and torqued everything. I had a problem with the bypass plate sticking, so I sent it back to Charles and he opened it up a little to free it.
Still no boost. The car pulls 18-20 inHg at idle and I sprayed all the connections and gasket areas with brake cleaner, as well as the intercooler. I even did all this with the bypass manually closed as well, but came up with nothing. Just to double check my butt dyno and boost gauge I took a datalog. The MAF follows the throttle position sensor just fine until the TP is opened up, but then it only shows the engines natural air capacity and no more. Score one for the butt dyno I guess. Anybody have an idea what might be going on?
Here is the datalog if anybody wants to see.
http://www.mediafire.com/?xciiygy1wyl