960 replies to this topic

[CHILL Gone DUTCH]

I will do a power run on the old V2 map in pro without the protection soon and see what's gained from turning the oem protection off I still think there's more to gain but concerned about the block and what it can take

[Exmantaa]

Can you start your runs earlier, so well below 4K? Just to see how the behavior is at lower revs

[CHILL Gone DUTCH]

Yes I will Car going on the road in April so will get it done then It's more jerky lower down when going straight on to full throttle

[oakmere]

How is the LS4 throttle body with the PRO software, did it resolve to the issues?

[CHILL Gone DUTCH]

TBH martin I didn't have a issue in v2

[CHILL Gone DUTCH]

Thought I would give this a bump to see how the b207 engines are holding up and what people are doing with them Are we still saying 400 is thelinit of these engines ?

[vocky]

400 is the limit for the B207 block

[CHILL Gone DUTCH]

400 is the limit for the B207 block

Thought you would say that

[TFD]

400 on the liners for a Gen II block as well? Find contradictious information on the web about it since they seem to have enforced cilinders (or waterjackets).

[vocky]

 

400 is the limit for the B207 block

Thought you would say that

 

 

Darton sleeves or a GEN 3 block if you want more

[CHILL Gone DUTCH]

 

400 is the limit for the B207 block

Thought you would say that  

  Darton sleeves or a GEN 3 block if you want more

Maybe somthing I should think about when I have the chains done over the next 3-4 years

[Rosssco]

This person seems to have found the limit of his @ 480 bhp... https://www.ebay.co....8.c100675.m4236

[vocky]

cracked where the dowels have been fitted, not good

[CHILL Gone DUTCH]

I guess I'm on the look out for a cheap astra vxr 2.0 block ( Gen 3 )

[Rosssco]

I guess I'm on the look out for a cheap astra vxr 2.0 block ( Gen 3 )

I could be totally wrong on this, but I think you may have to do some mods to either the gasket or the head, as I think the coolant channels from the Gen 3 may be slightly different (read somewhere..)

[vocky]

the main difference is the vvt, the block has two lugs to block off the oilways

 

so you can fit a non vvt head to a vvt block, but trying to fit a vvt head to a non vvt block might have issues

[Rosssco]

Ah, ok. That must have been what I (mis) read then..

[CHILL Gone DUTCH]

the main difference is the vvt, the block has two lugs to block off the oilways

 

so you can fit a non vvt head to a vvt block, but trying to fit a vvt head to a non vvt block might have issues

 

so shouldent be a issue using my crank and head in a A20nft (gen 3 block ) from a astra vxr which should equal up to 400 + hp

 

and my next question will my pistons and rods be ok ( will i need new rings head bolts gaskets etc etc ) and is it worth opening out my exhaust ports while im there to match the exhaust primarys ??

Edited by CHILL Gone DUTCH, 08 February 2018 - 07:22 PM.

[Nev]

 

the main difference is the vvt, the block has two lugs to block off the oilways

 

so you can fit a non vvt head to a vvt block, but trying to fit a vvt head to a non vvt block might have issues

 

so shouldent be a issue using my crank and head in a A20nft (gen 3 block ) from a astra vxr which should equal up to 400 + hp

 

and my next question will my pistons and rods be ok ( will i need new rings head bolts gaskets etc etc ) and is it worth opening out my exhaust ports while im there to match the exhaust primarys ??

 

 

Careful, you sound perilously close to installing a full turbo engine (and joining the dark side!).

 

[Rosssco]

Side question - has anyone fiddled about with the CR on a standard B207 to increase it, say by using a Z22SE (or is it a Z22YH) head gasket, from the original 9.5:1 to 10:1? I know the trend is low compression / extra boost (and heat), but it would be interesting to see results of the converse approach.