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The totally bestest cylinder heads. and stroker. Looking for the answer to the secret of the best head.s

#1 User is offline   5th injector 

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Posted 25 April 2017 - 9:34 AM

Howzit .
So im going to be building a CDB short block pretty shortly and I have a couple of questions.
What sort of heads are considered the best to use to fit the early type intake manifold?
I was thinking v3 v4 shimmy type numbers.
Has anyone tried running later model heads? like v7 v8? is that possible? I know IL have to change inlet man tps etc..
Kelfords dont make cams for the early stuff anymore has anyone tried regrind cams?
I'm liking the sound of doing a 2.1 stroker with standard rod length and stroker pistons on a 25 crank. any experienced strokers out there?
Ive got 4 months to do it.
Im needing a new turbo also and I want in the region of 300kw at the treads.
Fuel ecu and drive line are sorted. these are the missing pieces to the 300kw goal.
I do have an ez30r in stock that I was considering doing the old +t howsyafather on but I think Id prefer to build that one up stout and ask for 400kw.
Cheers.
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#2 User is offline   Sammy 

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Posted 25 April 2017 - 9:57 AM

Any shim under head should be roughly the same flow wise, v2 sti ra have a different/better/hard to get parts for - shim design. A guy on clubsub is running the CDB with the later model avcs heads. From memory You need to match piston to valve setup, the early stuff has different shape in the piston to allow for valve clearance than the later model stuff. Then the head gasket has to match which piston/head combo you choose to run to get a good compression ratio(there is a chart around out there, I have it somewhere if you need it). Have seen race cars on v3/4 reground cams pushing 280kw atw mark and higher on a link with race fuels (super crazy car though with all supporting mods). 300kw not an easy goal, check out turbos along the likes of gt3071 gt3076 or borgwarner EFR series, holset hx30 hx35 12cm housing (never seen much in use personally but SAS rate the BW EFR stuff highly and the other have proven results all over the internet forums) . I have no idea on strokers sorry. Valve springs are good investment/probably required at 300kw mark. 260kw would be much easier haha.
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#3 User is offline   5th injector 

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Posted 25 April 2017 - 11:51 AM

yeah I was thinking 30/76 or holset.
the avcs route is interesting for sure but I'd like to keep it a little simpler this time round. save that for the ez 30.
yeah 300kw ain't the easiest but it's easier than 400kw.
if I did swap to v7 heads what's the arrangement regarding the avcs setup? is it a blank off the solenoid situation?
what's the latest model head I can run?
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#4 User is offline   THE UNDERTAKER 

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Posted 26 April 2017 - 9:24 PM

View Post5th injector, on 25 April 2017 - 11:51 AM, said:

yeah I was thinking 30/76 or holset.
the avcs route is interesting for sure but I'd like to keep it a little simpler this time round. save that for the ez 30.
yeah 300kw ain't the easiest but it's easier than 400kw.
if I did swap to v7 heads what's the arrangement regarding the avcs setup? is it a blank off the solenoid situation?
what's the latest model head I can run?


You need to consider what you want the car for. Track days quick street car. Ported V3sti heads are my pick. If you goto bigger cams & holset turbo then the V7sti heads would be a plus to allow tuner to use the avcs for low - mid tunablity.
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#5 User is offline   5th injector 

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Posted 27 April 2017 - 10:50 AM

Then there is this http://www.trademe.c...-1310525347.htm
I have thought about what i want the car for. 300kw of it!
Its not a daily so why not I say.
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#6 User is offline   DacerX 

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Posted 28 April 2017 - 9:48 AM

Ej15 is a good engine
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#7 User is offline   5th injector 

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Posted 29 April 2017 - 2:35 AM

View PostDacerX, on 28 April 2017 - 9:48 AM, said:

Ej15 is a good engine


Dunno im not ready to go big block just yet..
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#8 User is offline   DCVR 

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Posted 29 April 2017 - 5:49 AM

View Post5th injector, on 27 April 2017 - 10:50 AM, said:

Then there is this http://www.trademe.c...-1310525347.htm
I have thought about what i want the car for. 300kw of it!
Its not a daily so why not I say.


that looks nice
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#9 User is offline   DacerX 

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Posted 29 April 2017 - 8:35 AM

just ls swap and be done with it
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#10 User is offline   THE UNDERTAKER 

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Posted 30 April 2017 - 12:49 AM

View Post5th injector, on 27 April 2017 - 10:50 AM, said:

Then there is this http://www.trademe.c...-1310525347.htm
I have thought about what i want the car for. 300kw of it!
Its not a daily so why not I say.


These are nice. Dave Green race engines in wellington have done a couple 2.2 closed decks for me. Alsort of thoughts on doweling the centre case. Funny the seller didnt understand guy question about O ringn the block. Which is a WRC thing.
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#11 User is offline   5th injector 

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Posted 30 April 2017 - 2:54 AM

View PostTHE UNDERTAKER, on 30 April 2017 - 12:49 AM, said:

View Post5th injector, on 27 April 2017 - 10:50 AM, said:

Then there is this http://www.trademe.c...-1310525347.htm
I have thought about what i want the car for. 300kw of it!
Its not a daily so why not I say.


These are nice. Dave Green race engines in wellington have done a couple 2.2 closed decks for me. Alsort of thoughts on doweling the centre case. Funny the seller didnt understand guy question about O ringn the block. Which is a WRC thing.



Are these a n/a block? or a 257? either way could the n/a block take the turbo crank and vise versa? I wonder is it a 5th thrust crank from standard or is this one modded.
Doweling the cases sounds pretty groovy. So would ya dowel the cases and then line bore em? all those things add up to a stout sounding block.
Ive seen those CDB's in the states doing 700 ponies and i guess the later model heads i use the better for cam selection.
I think asking 400 ish hp out of this isn't too bigger ask.
LS swap has been chucked around as this car has been rwd most of its life. But im going back to 4wd this time. just need a 6spd center.
How about you ls swap and ill do a compound turbo swap on a 1500. With a FWD gearbox. Open diff. Auto.
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