its finally happened ...... - Page 3

davebslater(uk) · Jan 16th, 2011, 16:36

dont forget , if you consider the whole system , the compressor is feeding the engine at set flow/pressure . change the flow , pressure must change as well , otherwise its not a constant

Steve940estate · Jan 16th, 2011, 21:43

I'll have to sit and think about that for a while, lol.
If it is the head/cam combination thats causing the the boost to be less what can you do to sort it out ?
Bigger less restrictive exhaust, less restrictive induction or does the Turbo itself need to be changed. Or is it just a case of winding the wastegate up a bit ?

stevieturbo · Jan 17th, 2011, 00:18

Quote:

Originally Posted by davebslater(uk)

well , ive had a road test , running nice and smooth , but it a bit slower?

then i noticed its not running the same boost by 3 psi , perhaps thats some flow restriction removed !!

anyway the boost doesnt come on as strong , but it is early days yet , ive not really tested it properly . the v cam being a bit different from the T cam , it certainly doesent feel as torquey

What sort of boost control are you using ?

Generally whilst airflow may increase, boost control setup should maintain the same boost pressure. But if it's some sort of manual bleed, it may just need re-adjusted.

And as for performance. Until fuelling and ignition have been optimised for the new setup, you may not see the gains you want to see.

Out of interest. Where are you buying the OE type cams from ? Local motor factors ? I assume the likes of AE do replacement cams ?
Cant imagine Volvo being very cheap. I take it, from looking at various cam charts, the "K" cam is the pick of the bunch ? Or a VX3, wherever it might be sourced ?
The "T" in mine does look very tame.

I looked at some other links for some places selling cams, and the prices seemed horrendous ( circa £300+ )

And are the heads solid lifters, or hydraulic ? ie, will most cam swaps be a hassle having to re-shim or adjust ?

davebslater(uk) · Jan 23rd, 2011, 23:21

well , i sorted the boost issue , and err all is well....... it pulls very nicely , altho ive got a ticking camshaft , perhaps the silencers werent fitted , but , ill look at that when i get time .

Jan 16th, 2011, 16:36	#21
davebslater(uk) redbollock guru Last Online: Jun 30th, 2016 23:54 Join Date: Jan 1970 Location: lincoln	dont forget , if you consider the whole system , the compressor is feeding the engine at set flow/pressure . change the flow , pressure must change as well , otherwise its not a constant __________________ www.dbsmotorsport.co.uk

Jan 23rd, 2011, 23:21	#24
davebslater(uk) redbollock guru Last Online: Jun 30th, 2016 23:54 Join Date: Jan 1970 Location: lincoln	well , i sorted the boost issue , and err all is well....... it pulls very nicely , altho ive got a ticking camshaft , perhaps the silencers werent fitted , but , ill look at that when i get time . __________________ www.dbsmotorsport.co.uk

Jan 16th, 2011, 21:43	#22
Steve940estate Steam Driven PC Owner. Last Online: Mar 4th, 2024 23:50 Join Date: Dec 2004 Location: Not sure.	I'll have to sit and think about that for a while, lol. If it is the head/cam combination thats causing the the boost to be less what can you do to sort it out ? Bigger less restrictive exhaust, less restrictive induction or does the Turbo itself need to be changed. Or is it just a case of winding the wastegate up a bit ?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)