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| General Car / Scooby Chat General chat, car related. Threads posted in here may well be re-directed to a more relevant home. |
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#1
10-01-2016, 04:06 PM
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Rcm header set up
On eBay seems good with all oem gaskets , I'd be tempted but can't as got to stay boring stock lol
Item number 252245120112 
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#3
10-01-2016, 07:56 PM
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The ra won't as then will need map and a lot of money for just ported headers,
Is there any proven gain from this aswell?? The rcm is a great fitment too , but will loose a little rumble from them
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#4
10-01-2016, 08:09 PM
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Quote:
I noticed a spool improvement when I did mine and again didn't bother adjusting the map. It just makes it breath more easily and gets a great volume of air to the turbo quicker.. There are better gains to be had from ported OE then a lot of aftermarket so called performance headers.
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#5
10-01-2016, 08:37 PM
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That's interesting as always have this feeling that your only porting a inch down so your still with a restrictor, it's like having a 3 inch down pipe down to a 2.5 it still isn't free flowing just moving the limit further down ,
But if you say you felt an improvement then blows my theiry out, Some aftermarket headers and up pipes don't work as to large and flood non large blowers, I found the rcm worked very well on A vf35 I'm still unsure if I want to do that stuff to my ra as don't want to modify it other than fitting Sti parts Would love these and the ti cat back that's for sale on here and get a ti down pipe to match
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#6
11-01-2016, 06:41 AM
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Main issue with tubular headers is a loss of spool especially on the supplied up-pipe hence the turbo match Harvey Smith versions available from Alyn! Most people say stick with ported up to around 400/450 Bhp it's only above that you will see gains. I was running 440 on ported OE with matched up-pipe and gained 2 Bhp and lost about 100rpm spool when I switched, however the boost was 0.1 bar lower for the same result (And the clutch was slipping!).
http://www.southeastscoobies.co.uk/v...&postcount=184
__________________
2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter
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#7
11-01-2016, 08:39 AM
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as above on a std car then a well ported set of headers and matched "trick" up-pipe will out spool and out perform most aftermarket set-ups.........
whilst the RCM / GT2 spec headers are very good for higher power they still suffer from a lack of response and can be improved again with a Harvey Smith "trick" up-pipe
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 ASPerformance 0191-4103770 PELTOR, PFC BRAKES, PAGID MOTUL, FERODO, SPEEDLINE, TRS, MINTEX, PIAA, HELLA, TEIN, WHITELINE, SUPER-PRO, MILLERS OILS online shop!!
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#8
11-01-2016, 09:04 AM
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Thanks for updates on this guy's, I've been reading up on the trick up pipe, and confused myself not realizing the trick up pipe is a complete new item not just the stock one ported which i still cant see making any difference as the restriction is still there,
but the 'harvey' up pipe tailor made to your car sounds a good idea. i ran rcm set up on stock vf35 mapped by jgm and had a gain powerstation ecutek mapped @ 330hp same car jgm ecutek mapp with rcm headers and up pipe, swapped out hks to cosworth panel filter 343bhp Still think to my original post £300 seems good price for the complete set up with gaskets. and no its not my ad lol 
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#9
11-01-2016, 01:23 PM
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Intrestesting topic this as looking at my next purchase ported headers with harvey trick up seems to be a good investment but then again so is rcm headers with harvey trick up pipe alot to decided on what route to take .
__________________
Maintained by Hypertech and Mapped by Andy Forrest 1998 UK Turbo , 1998 Terzo , 1997 JDM Type R the money pit , 2004 black WRX STI Type UK , 2004 blue FSTI
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#10
11-01-2016, 03:07 PM
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It's a difficult call, I'd still say under 400 stick to ported OE (possibly with Grimmspeed cross over pipe) and a Harvey up-pipe, 400+ consider RCM and a Harvey up-pipe.
__________________
2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter Last edited by SpecB; 12-01-2016 at 06:44 AM.
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#11
12-01-2016, 04:10 AM
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Is it expensive to get oem headers ported as ive not seen any for sale for a while now and of course Alyn you can send me a pm if you like for full set up including harvey trick up pipe .
__________________
Maintained by Hypertech and Mapped by Andy Forrest 1998 UK Turbo , 1998 Terzo , 1997 JDM Type R the money pit , 2004 black WRX STI Type UK , 2004 blue FSTI
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#12
12-01-2016, 01:20 PM
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We ran a test a few years ago on a set of ported headers i did
13bhp 15fbt increase and bringing turbo spool down 400rpm. well worth doing imo
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all over it jaffa style!!!
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#13
12-01-2016, 01:53 PM
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Quote:
__________________
Maintained by Hypertech and Mapped by Andy Forrest 1998 UK Turbo , 1998 Terzo , 1997 JDM Type R the money pit , 2004 black WRX STI Type UK , 2004 blue FSTI
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