efr 8374 w/pettit ic core
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Beans912 (12-11-23)
#6
Time or Money, Pick one
iTrader: (36)
I’m on a medium to large streetport. That’s what DJ calls it if I remember right. My irons are also ported at the LIM to the larger 13bre runners. I am running water meth so I’m picking up a little there. I believe Ptrhahn made similar power at 15lbs as well, maybe more actually.
#8
Rotary Motoring
iTrader: (9)
Ditching the Racing Beat catback for anything else should get you 15-25hp for starters.
Its not that I have anything against Racing Beat, they are a bad *** company. I believe Banzai Racing has found this and should have the before and after dynos.
If you want a similar quiet and conservative looking exhaust you can get Tanabe Medallion.
Its not that I have anything against Racing Beat, they are a bad *** company. I believe Banzai Racing has found this and should have the before and after dynos.
If you want a similar quiet and conservative looking exhaust you can get Tanabe Medallion.
#9
Senior Member
iTrader: (7)
I don't mean to jack the op's thread, but this is the problem-- https://www.rx7club.com/single-turbo...sults-1118515/
Identical setup, stock port, 8374, 93 pump, AI, restrictive exhaust, same place, same dyno, he's boosting 20+psi, my setup will hardly break 15 and settles to 13.5-14. I have a boost control issue it seems. See my build thread for more info.
Identical setup, stock port, 8374, 93 pump, AI, restrictive exhaust, same place, same dyno, he's boosting 20+psi, my setup will hardly break 15 and settles to 13.5-14. I have a boost control issue it seems. See my build thread for more info.
Last edited by aplscrambles; 03-23-20 at 10:52 PM.
#11
Arrogant Wankeler
Even as someone with a SMIC, I will strongly suggest that intercooler core temp at cruise will have a far bigger impact than intake tract volume to response/boost threshold. If you were talking exhaust manifold volume it's a different story.
#12
Rotary Enthusiast
iTrader: (5)
I'm not sure what core Petit uses. If Spearco, like the ASP/M2 intercoolers, a test was done in the late 90's/early 2000's comparing the stock IC to others available at the time and the M2 Large only lost 1 or 2 psi. That test used to be archived on the Lightning in a World of Thunder web site.
The short piping aids response too.
The short piping aids response too.
#13
TANSTAFL
iTrader: (13)
Ditching the Racing Beat catback for anything else should get you 15-25hp for starters.
Its not that I have anything against Racing Beat, they are a bad *** company. I believe Banzai Racing has found this and should have the before and after dynos.
If you want a similar quiet and conservative looking exhaust you can get Tanabe Medallion.
Its not that I have anything against Racing Beat, they are a bad *** company. I believe Banzai Racing has found this and should have the before and after dynos.
If you want a similar quiet and conservative looking exhaust you can get Tanabe Medallion.
#17
Rotary Enthusiast
iTrader: (5)
In regards to the Racing Beat mufflers, there were at least two different style of tips and how they branded the tips from the originals to now. Does anyone know if the muffler canister was changed?
I have an original one that bought in 1997 when they still sold them with the option for mild steel construction.
I have an original one that bought in 1997 when they still sold them with the option for mild steel construction.
#22
Rotary Motoring
iTrader: (9)
Amazing what high priority external wastegate can do isnt it.
If external wastegate can flow enough the cat back doesnt have to.
This is Twins Turbo long runner exhaust manifold with extreme external wastegate priority like on that car.
Exhaust has easier path to the external wastegate than to the turbo itself.
If external wastegate can flow enough the cat back doesnt have to.
This is Twins Turbo long runner exhaust manifold with extreme external wastegate priority like on that car.
Exhaust has easier path to the external wastegate than to the turbo itself.
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djseven (03-31-20)
#25
Racing Rotary Since 1983
iTrader: (6)
i run a single outlet RB catback along with a Borla 40944 mid muffler and consider it to be top notch. i did check the RB muffler and verified the I D at 3 inches so i don't see it as restrictive.
perhaps the dual outlet RB might be restrictive however i don't have any experience with it.
as far as WG sizing, it does of course greatly depend on the manifold design. from a power standpoint ideally you want no wastegate to impede flow. of course flow must be controlled. to the extent you bias the manifold in favor of the WG position V flow you can run a smaller WG(s) but you give up in drive to the turbo. it is a balancing act.
my manifold purposely favors flow over WG position. WG outlet flow joins the downpipe at a friendly shallow angle. i use a single large Tial V60 wg and have no boost creep running an EFR9180 at 15 psi. boost range in this log running off the spring was between 15.2 and 15.8.
perhaps the dual outlet RB might be restrictive however i don't have any experience with it.
as far as WG sizing, it does of course greatly depend on the manifold design. from a power standpoint ideally you want no wastegate to impede flow. of course flow must be controlled. to the extent you bias the manifold in favor of the WG position V flow you can run a smaller WG(s) but you give up in drive to the turbo. it is a balancing act.
my manifold purposely favors flow over WG position. WG outlet flow joins the downpipe at a friendly shallow angle. i use a single large Tial V60 wg and have no boost creep running an EFR9180 at 15 psi. boost range in this log running off the spring was between 15.2 and 15.8.
Last edited by Howard Coleman; 03-31-20 at 06:33 PM.