AVCS heads or V4 heads ?
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AVCS heads or V4 heads ?
As the heads will be off the car for another rebuild, I am thinking of AVCS heads.
Is it worth all the extra cost if I have V4 heads on my 2.5 converted WRX?
I would like to max out my AF20G turbo with the max drive-ability for the road so spool up is the priority.
Is it worth all the extra cost if I have V4 heads on my 2.5 converted WRX?
I would like to max out my AF20G turbo with the max drive-ability for the road so spool up is the priority.
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The engine is forged, and I have a Simteck etc.
I would need the additional wiring and then sort an inlet manifold as I use the V1 type at the moment, I need spacers anyway to get a decent inlet sorted for the V1 inlet.
I wqas actually thinking of changing the ECU again, but keeping my options open at the moment. I was just woundering if the difference between the two set-up would be night/day or would I just get a small increase in drivability/power. I may be better off spending the £ on ported heads. I doubt if I will change the turbo in the future as 20g is enough.
I would need the additional wiring and then sort an inlet manifold as I use the V1 type at the moment, I need spacers anyway to get a decent inlet sorted for the V1 inlet.
I wqas actually thinking of changing the ECU again, but keeping my options open at the moment. I was just woundering if the difference between the two set-up would be night/day or would I just get a small increase in drivability/power. I may be better off spending the £ on ported heads. I doubt if I will change the turbo in the future as 20g is enough.
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You will either need a newage inlet manifold or you will have to modify your current manifold to make it wider and then use adapters. If you go with the newage manifold you will then need to modify the wiring for the AVCS, TPS and ICV. Not a simple modification process.
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Hi, the V4 heads are on the motor already and as I have a HG problem the heads and motor are comming out (Mod for 2.5 done already), so the question was should I upgrade ? Looking at all the data I can see the V4 heads are quite good, and I think there is not alot of difference in inlet manifold as far as performance. I need to get a good flow to the intake of the turbo, so will be playing about with the fuel lines and adding a spacer to give me the clearance I need to get a direct straight entry.
I was thinking the new head design and variable cam timing would give me better spool, and a little more advance in the higher RPM for more power , but its probly going to be a minimal increase, I am probly better off spending more £ elswhere. Next trip to Scotland for a new map me thinks when its all complete I hope for 400/400 and a good spread of power.
I was thinking the new head design and variable cam timing would give me better spool, and a little more advance in the higher RPM for more power , but its probly going to be a minimal increase, I am probly better off spending more £ elswhere. Next trip to Scotland for a new map me thinks when its all complete I hope for 400/400 and a good spread of power.
#12
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Hi, the V4 heads are on the motor already and as I have a HG problem the heads and motor are comming out (Mod for 2.5 done already), so the question was should I upgrade ? Looking at all the data I can see the V4 heads are quite good, and I think there is not alot of difference in inlet manifold as far as performance. I need to get a good flow to the intake of the turbo, so will be playing about with the fuel lines and adding a spacer to give me the clearance I need to get a direct straight entry.
I was thinking the new head design and variable cam timing would give me better spool, and a little more advance in the higher RPM for more power , but its probly going to be a minimal increase, I am probly better off spending more £ elswhere. Next trip to Scotland for a new map me thinks when its all complete I hope for 400/400 and a good spread of power.
I was thinking the new head design and variable cam timing would give me better spool, and a little more advance in the higher RPM for more power , but its probly going to be a minimal increase, I am probly better off spending more £ elswhere. Next trip to Scotland for a new map me thinks when its all complete I hope for 400/400 and a good spread of power.
Last edited by 2pot; 30 August 2013 at 05:04 PM.
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