VF35 laggy on newage WRX heads?
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VF35 laggy on newage WRX heads?
hello,
We are currently putting together an engine to drop into a bugeye sti shell we were originally going for standard 2001 onwards WRX heads however we have been told with the vf35 turbo this will be quite laggy..so now we arent sure whether to go and spend the extra on the V7 heads with avcs as this will aid spool time of the turbo.
I have recently sold my own 2005 sti type uk and loved how easy it was to drive compared to the older classic wrx models and would like to have as close to that as possible.
main spec of the engine so far...
Sti inlet manifold
sti injectors
sti intercooler
vf35 turbo
sti rebuilt closed deck bottomend using forged parts
walbro 255
equal length headers
Car will be mapped when it is ready to go...
I'm really looking for peoples opinion and experience of fitting the vf35 on newage wrx's and finding out if the spool time is reduced or isit laggy?
cheers
gordon
We are currently putting together an engine to drop into a bugeye sti shell we were originally going for standard 2001 onwards WRX heads however we have been told with the vf35 turbo this will be quite laggy..so now we arent sure whether to go and spend the extra on the V7 heads with avcs as this will aid spool time of the turbo.
I have recently sold my own 2005 sti type uk and loved how easy it was to drive compared to the older classic wrx models and would like to have as close to that as possible.
main spec of the engine so far...
Sti inlet manifold
sti injectors
sti intercooler
vf35 turbo
sti rebuilt closed deck bottomend using forged parts
walbro 255
equal length headers
Car will be mapped when it is ready to go...
I'm really looking for peoples opinion and experience of fitting the vf35 on newage wrx's and finding out if the spool time is reduced or isit laggy?
cheers
gordon
#3
I've run a TD05 16G and a TD05 18G on my bug WRX standard heads without any issues with lag. Does the shell come with looms etc as it was destined to have AVCS ?
Shaun
Shaun
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i have recently fitted a vf35on a wrx and it is quite laggy compared to my sti with the vf35,turbo comes in about 500 revs later for some reason. the car was also fitted with a full decat system,walbro 255,sti pinks,k&n filter and sti intercooler with scoop and undertray then had an ecutek remap by andy forrest.the car still puts out 340 bhp top end just not so good at the bottom.
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Cheers for the replies guys, as it was an sti shell the loom will have the connections for the avcs heads however as the car was being mapped with the current part I was hoping it wouldn't matter.
I recently sold my 2005 sti type uk and loved how easy it was to drive with the early spool.
Begining to think it might be easier to go for the sti heads now
I recently sold my 2005 sti type uk and loved how easy it was to drive with the early spool.
Begining to think it might be easier to go for the sti heads now
#7
Personally I'd go for the AVCS heads........... a few STi's are being broken by scoobyspares at the moment or try somewhere like finch Motorsport
Shaun
just looked........doesn't seem to have any at the moment but worth a call
http://www.finchmotorsport.co.uk/page.php?a=3&s=69&p=69
Shaun
just looked........doesn't seem to have any at the moment but worth a call
http://www.finchmotorsport.co.uk/page.php?a=3&s=69&p=69
Last edited by Midlife......; 25 June 2011 at 06:21 PM.
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#11
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I have AVCS on mine WRX,but mine is JDM WRX which have AVCS.
Now about the plug-in AVCS to your WRX is possible,but not sure if its your ECU can control AVCS,if not you will need JDM WRX ECU or aftermarket ECU like Syvecs,SimTek,Link etc.
VF35 i never tried,but VF34 on mine WRX has been spooly turbo which has similar spool characteristic as mine TD04L.
Yes AVCS will help spool turbo around 300-500rpm from some reports, definitely worth to do on WRX.
Jura
Now about the plug-in AVCS to your WRX is possible,but not sure if its your ECU can control AVCS,if not you will need JDM WRX ECU or aftermarket ECU like Syvecs,SimTek,Link etc.
VF35 i never tried,but VF34 on mine WRX has been spooly turbo which has similar spool characteristic as mine TD04L.
Yes AVCS will help spool turbo around 300-500rpm from some reports, definitely worth to do on WRX.
Jura
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The shell the engine is going into is a v7 uk sti which has the full loom including plugs for avcs.
The headers are equal length headers.. Unsure which brand they are..possible eBay jobs.
I just need to decide if it will be worth it going down the sti heads or not.. Trying to keep costs down as I'm running out of money lol
The headers are equal length headers.. Unsure which brand they are..possible eBay jobs.
I just need to decide if it will be worth it going down the sti heads or not.. Trying to keep costs down as I'm running out of money lol
#14
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The shell the engine is going into is a v7 uk sti which has the full loom including plugs for avcs.
The headers are equal length headers.. Unsure which brand they are..possible eBay jobs.
I just need to decide if it will be worth it going down the sti heads or not.. Trying to keep costs down as I'm running out of money lol
The headers are equal length headers.. Unsure which brand they are..possible eBay jobs.
I just need to decide if it will be worth it going down the sti heads or not.. Trying to keep costs down as I'm running out of money lol
As above ported headers with Harvey up pipe,will bring spool to lower RPM.
Yes is worth down the route of AVCS,in my view.
Jura
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Thanks Jura.
If money was not an object STi heads and ECU are a better starting point because you have better valves and cams but there are plenty WRX road cars that have been made in to very fast cross country vehicles with the VF35, proper mapping and supporting mods.
Without more information about your headers I cannot comment further but this is usually the cause of poor spool and response. Are the headers one piece or is there a set of headers and a separate uppipe? Is there a flexi joint, slip joint? How about a photograph if you want more assistance.
If money was not an object STi heads and ECU are a better starting point because you have better valves and cams but there are plenty WRX road cars that have been made in to very fast cross country vehicles with the VF35, proper mapping and supporting mods.
Without more information about your headers I cannot comment further but this is usually the cause of poor spool and response. Are the headers one piece or is there a set of headers and a separate uppipe? Is there a flexi joint, slip joint? How about a photograph if you want more assistance.
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