Calling Syms Racing manifold owners
#1
Calling Syms Racing manifold owners
We've just installed a Syms manifold on my V5 STi Type R along with some other modifications, just curious in what aspects Syms helped you - other than the insane sound
The old setup:
OEM VF34
OEM yellow 440ccm injectors
OEM TMIC
Custom made headers
APS turbo back
Motec M48
Blitz cold air intake
The car made 350hp/450Nm around 1.5 bar, spool came right at 3700rpm.
The new setup:
Turbo Dynamics Hybrid VF34
STi pink 550ccm injectors
Process West TMIC
Syms equal length headers
Custom turbo back
Motec M48
Blitz cold air intake
The car makes 360hp/480Nm @ 1.55 bar, spool comes at 4400rpm…
The first positive step is the sound, just amazing. Sounds almost like a WRC, just love it Check it out: http://www.youtube.com/watch?v=ew9Yqz9nWt4
Now comes the bad news…car spools at 4400rpm – definately not happy about that I'm aware that the larger TMIC does not help spool, but Syms adds only more lag to this (we've gained 20hp at above 6000rpm, but thats due to the TMIC)
We've replaced the Syms with unequal length Tomei manifolds, the car spooled at 4100 and way better above 6000 too. We've measured the backpressure of the Syms and the Tomei, guess what: the Syms' backpressure is almost 15% less compared to the Tomei
Is this normal or we have a constant leak we can't hear or see? The car feels sluggish below 4000 and pressure builds up reeeaal slow. Everything is fine above 4500-8000rpm, but I've expected more of Syms. Right now I have to say, that Syms is laggy compared to a cheaper Tomei manifold, which is superior in all aspects except for sound.
Any thoughts?
The old setup:
OEM VF34
OEM yellow 440ccm injectors
OEM TMIC
Custom made headers
APS turbo back
Motec M48
Blitz cold air intake
The car made 350hp/450Nm around 1.5 bar, spool came right at 3700rpm.
The new setup:
Turbo Dynamics Hybrid VF34
STi pink 550ccm injectors
Process West TMIC
Syms equal length headers
Custom turbo back
Motec M48
Blitz cold air intake
The car makes 360hp/480Nm @ 1.55 bar, spool comes at 4400rpm…
The first positive step is the sound, just amazing. Sounds almost like a WRC, just love it Check it out: http://www.youtube.com/watch?v=ew9Yqz9nWt4
Now comes the bad news…car spools at 4400rpm – definately not happy about that I'm aware that the larger TMIC does not help spool, but Syms adds only more lag to this (we've gained 20hp at above 6000rpm, but thats due to the TMIC)
We've replaced the Syms with unequal length Tomei manifolds, the car spooled at 4100 and way better above 6000 too. We've measured the backpressure of the Syms and the Tomei, guess what: the Syms' backpressure is almost 15% less compared to the Tomei
Is this normal or we have a constant leak we can't hear or see? The car feels sluggish below 4000 and pressure builds up reeeaal slow. Everything is fine above 4500-8000rpm, but I've expected more of Syms. Right now I have to say, that Syms is laggy compared to a cheaper Tomei manifold, which is superior in all aspects except for sound.
Any thoughts?
Last edited by Visionhu; 17 November 2011 at 04:45 PM.
#4
Syms racing equal lenght headers have small diameter pipework and a built in up pipe....
Mine sound and perform awsome but this was compared to subaru original equipment....went from 360 to just over 400 with Syms headers...
Mine sound and perform awsome but this was compared to subaru original equipment....went from 360 to just over 400 with Syms headers...
#5
Scooby Regular
iTrader: (13)
I have the Syms equal length headers and its bespoke twin venturi uppipe. Mine seem to perform okay in conjunction with my 20g. And being unequal, most of the flat-4 burble has gone. But it's replaced by more of a, as you say, WRC-type wail.
Is that the noise of your Syms mani. in that vid ^^^?! It sound like there's a massive leak somewhere, what with it making that rough stucatto type noise! Did nobody there pick up on that?!
Is that the noise of your Syms mani. in that vid ^^^?! It sound like there's a massive leak somewhere, what with it making that rough stucatto type noise! Did nobody there pick up on that?!
#6
Roofer what setup/mods you're running mate?
I want to figure out if its the header that makes the lag or maybe another component I'm not thinking of currently…
The current turbo back pipe is slightly smaller in diameter than the previous, so the spool should be better. Its not
I want to figure out if its the header that makes the lag or maybe another component I'm not thinking of currently…
The current turbo back pipe is slightly smaller in diameter than the previous, so the spool should be better. Its not
#7
Joz, I'm running completely catless, its just a tube with a center resonator. That's why you're hearing the rough noise (I guess). We've checked for leaks, but didn't find anything. Maybe we missed something?
Last edited by Visionhu; 12 November 2011 at 10:09 PM.
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#9
Roofer what setup/mods you're running mate?
I want to figure out if its the header that makes the lag or maybe another component I'm not thinking of currently…
The current turbo back pipe is slightly smaller in diameter than the previous, so the spool should be better. Its not
I want to figure out if its the header that makes the lag or maybe another component I'm not thinking of currently…
The current turbo back pipe is slightly smaller in diameter than the previous, so the spool should be better. Its not
Old dinosaur GT30 standard position
740cc injectors
full 3" system
Custom intake
Autronics
After fitting the Syms manifolds the most noticable difference (apart from sound)was in mid range and didnt seem to run out of puff at top end...
Mine sounded similar to your in clip with the Titanium exhaust i had before but was too loud for track so swapped to Revolution exhaust....
Dont have any of it stationary but you can here it barking here >>. Lol...
Go to 7.35
http://youtu.be/MJwjzP60f2Q?t=7m36s
Last edited by rooferman; 13 November 2011 at 01:08 PM.
#10
How about spool rpm, any changes in that?
Cheers, Chris.
#11
Former Sponsor
iTrader: (48)
There are a number of causes of poor spool. For instance today we have a car with the wastegate penny valve partially open. Any gas leak from the cylinder head to the turbo will also cause poor spool.
After that I would look at the design of the headers and uppipe.
Next on the list is the mapping of your car as the map can have a big effect on spool.
Your Avatar does not say where you are located but if you were within striking distance of Darlington we would be prepared to look at an overall package to resolve your issues after we had inspected your vehicle.
After that I would look at the design of the headers and uppipe.
Next on the list is the mapping of your car as the map can have a big effect on spool.
Your Avatar does not say where you are located but if you were within striking distance of Darlington we would be prepared to look at an overall package to resolve your issues after we had inspected your vehicle.
#12
Hey Harvey, thanks for the offer mate I'm in Hungary so the inspection is not going to work We've already checked all parts and everything seems to be in perfect shape, I guess its just the design of the header. In exchange I love the sound it makes
However, we've installed an Injen cold air intake and it looks like this helped a lot. Previously I had a Blitz intake installed (the one with the metal mesh structure).
I don't have a Dyno sheet after the Injen installation, but here's one with the Blitz. The main difference is that based on the MoTeC logs I have the desired boost @ 4130rpm right now (instead of 4300rpm as you can see on the graph)
However, we've installed an Injen cold air intake and it looks like this helped a lot. Previously I had a Blitz intake installed (the one with the metal mesh structure).
I don't have a Dyno sheet after the Injen installation, but here's one with the Blitz. The main difference is that based on the MoTeC logs I have the desired boost @ 4130rpm right now (instead of 4300rpm as you can see on the graph)
Last edited by Visionhu; 17 November 2011 at 04:46 PM.
#14
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Syms equal length here, no issues with spool and I concur with Rooferman regarding seat of the pant dyno performance...will did up a vid for sound when I get in
#15
Just a thought check your turbo inlet pipe, mine started being really laggy and after a lot of head scratching found that the rubber part of the inlet pipe had been chewed by the hose clip around it over time. I replaced it with a samco (ouch) and problem solved :-)
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