s366 4.8 Camaro 6speed, Steven Sigmon
#162
TECH Fanatic
iTrader: (12)
Join Date: Jun 2007
Location: earth
Posts: 1,438
Likes: 0
Received 0 Likes
on
0 Posts
2 1/2 inch downpipe must be effecting spool cause even my pt7675 was full boost by 3-3500rpm depending on where i floored it, ls6 cam as well 3 inch downpipe. i will have my s366 setup together here shortly. trying a stock 98 cam if that doesnt work well ill throw in my tu1
#165
TECH Fanatic
Thread Starter
#168
TECH Fanatic
Thread Starter
#169
TECH Fanatic
Thread Starter
#170
TECH Fanatic
Thread Starter
And for the New downpipe. 3.5" all the way out and new flange from Race Parts Solutions. Picked up 3-4 psi just from this new downpipe changing nothing else.
Some of the stainless bends are defects from KOOKS that why this one has a slight roll in it. Helping him keep cost down.
Some of the stainless bends are defects from KOOKS that why this one has a slight roll in it. Helping him keep cost down.
Last edited by mrstepheneades; 03-31-2014 at 03:09 PM.
#171
TECH Fanatic
Thread Starter
One more thing. Don't use a cheap clamp on your cold pipes. After the new downpipe we when for a ride. Now the car makes 13psi and it blew the pipe off lol. Messed radiator up and ripped wires out of iat sensor. Radiator still holds fluid but just looks messed up. I gave him a nice tbolt clamp to put back on so this wont happen again.
#173
9 Second Club
Whilst it's always wise to use quality clamps.
The problem there is mostly due to a non existent bead/lip on that TB.
Tightening the crap out of it with strong clamps is one solution, but not always the best.
The problem there is mostly due to a non existent bead/lip on that TB.
Tightening the crap out of it with strong clamps is one solution, but not always the best.
#174
TECH Fanatic
Thread Starter
#175
TECH Fanatic
Thread Starter
#179
TECH Fanatic
Thread Starter
Got Steven's car back in the shop to do address a few issues. For one a major boost leak thru the iat sensor causing max boost to be 10psi regardless. Going to install an exhaust trim ring also and put a lt1 cover on the top of the radiator. He still needs a turbo blanket and a few things but its getting there. Hopefully today I will see 15psi or so when I take it out for a test after fixing leak and adding another spring in the gate.
#180
TECH Fanatic
Thread Starter
A long evening with this car trying to figure out why it will not make more boost. I checked intake, lines behind intake, all vacuum lines in general going to the wastegate and bov, all couplings and clamps and cold piping, took intercooler off and pressure tested with air, fixed iat sensor where no air will pass through it, checked tb gasket, added another spring in the wastegate and still not but 10psi at peak. Made a super thick aluminum cap off plate for the vband wastegate port and capped it of to see if there was a problem with the wastegate. Its a JGS 50mm and ive never heard of them having problems. Took the car out and it hit 12psi and felt like it picked up 100rwhp across the rpm band. Rolls third off as soon as boost comes in and tires are spinning a little in fourth as well. Also the response is half the time it was. It probably will not stay capped off for long before the gate goes back on but it is puzzling why it will not produce more boost pressure. Also took EGR Block off plate off and checked oring and looked into intake to make sure the intake valley plate was intact.
Specs again are:
4.8
243's
LS6 Cam/with springs/pushrods, all the normal cam stuff.
BBK Aluminum Intake
S366 with 1.00ar/73mm turbine
3" CX Racing Intercooler
JGS 50mm Wastegate
HKS BOV
Its on straight 93 pump gas and 16 degrees of timing according to the tuner (Jonathan@Tick)
Maybe it could be something with the valvetrain bleeding boost off? Maybe a restriction from the intercooler? Got me scratching my head!!!
I did put a lt1 cover over the radiator which he provided and also an exhaust trim ring on. Car looks a lot cleaner.
Specs again are:
4.8
243's
LS6 Cam/with springs/pushrods, all the normal cam stuff.
BBK Aluminum Intake
S366 with 1.00ar/73mm turbine
3" CX Racing Intercooler
JGS 50mm Wastegate
HKS BOV
Its on straight 93 pump gas and 16 degrees of timing according to the tuner (Jonathan@Tick)
Maybe it could be something with the valvetrain bleeding boost off? Maybe a restriction from the intercooler? Got me scratching my head!!!
I did put a lt1 cover over the radiator which he provided and also an exhaust trim ring on. Car looks a lot cleaner.