hi Guys,

My car is booked in with Karl for a load of work including my headgasket. T34 hybrid, greys and remap. while the head is off im going to ask Karl to port it. Has anyone got a ported cossy head from Karl and whats the difference? One i want is a stage one low lag 400.

Cheers fellas

 

The difference is down to what you ask to be done Martin.

You cant compare head to head as they're for each individual persons spec/budget but needless to say they're awesome pieces of kit and almost a shame to put back on the engine,

Jake

 

shings,

do you live in solihull mate? ur sig says you do. Thats where i live as well mate?? vheers for the info.

 

I would discuss your needs with Karl, because although porting the head will ultimately give more power, it will lose some midrange. So it might be an idea to just do three-angle valves / seats. Karl will best advise you though on the spec that will be most suited to your needs, but you do need to sit down and discuss how the car will be driven for Karl to give his best recommendations. Also, you will have to push even a 0.63 a/r T34 VERY hard to get 400bhp on today's fuel, let alone a 0.55 a/r one .

 

As Mike says, talk to Karl, he will give it to you totally straight and honest about what will happen in terms of gains/losses

Anyone else opinion based on what we think he might do is utterly pointless when you can get it straight from the horses mouth, especially when its such a well respected horse

 

I think karl also wants 3 months to do head work like a proper nice ported cossi head so he told me when i asked.

 

my head is with Karl as we speak, i'm having the Stg1 which is basically a 'new head' , it'll be re-faced, multi angle valve seats,new guides, stem seals and a light port on the inlet throat.

he'll do whatever you ask him too, but of course he'll advise what he feels is best for your spec. the light porting he does i'd imagine isn't necessarily to gain performance as such, just to improve on the standard design, it will rev better higher up but i doubt you'd see much power gain. if you do want to go over 400bhp then you'd need different cams and maybe turbo and it gets expensive then as you'd probably also need double valve springs etc etc etc

The sky's the limit really, just depends what your target power is

 

Yes its not just a five minute job and like you said im sure he has a waiting list of some sort and wouldnt be able to do it between jobs etc.

My advice is, when the new turbo and greys are fitted the difference will be unreal, running a t34 like me you will be much beter sticking with the standard head and cams for now as i reckon they will be plenty for that sort of spec

I want an engine buliding its just a case of how far i want to go and how much money ive got, mind you if things keep going wrong like they do it will never happen

 

oh and the 'low lag 400' is a stg 2 head

stg1 isn't suitable for 400bhp

 

Head specs are chosen dependant on what you tell me and what you ask for. (i.e. usually maximum forseeable power required is the main factor, as people tend to buy a head which a future bigger spec in mind. If you know exactly what you want, then chosing the right spec is much more simple!

Just to clarify, the waiting time is dependant upon what spec head you have. For my lower spec heads that don't require extensive porting I can normally do these jobs within a couple of weeks as I can fit the work in between other jobs. However when people order my big spec heads that require big ports, it takes me over 40 hours to produce such a head and as such it is'nt viable to do this jobs in between other jobs. As such I have a strict waiting list for top spec heads, and it does vary from 2 - 6 months at present!

In the future I hope to be able to speed up the production of heads and engines with our expansion and being 3 people instead of just myself, but time will tell!!

 

Great news Karl hope it all goes as planned as im sure this will take off very well indeed

 

Ill second that Beachy

 

why wait for karl to do it get spenner from here to port it to karls spec can get it done in weeks instead of months

 

I doubt Karl will give his Spec's out so that others can do the work

 

How do you "spec" a valve throat, you either know what shape it needs to be or you dont, you cant write it down for someone else to do!

 

You know Tiff i was thinking somthing like that myself.....

''here you go mate, its the top spec''

Runs off laughing

 

well spenner has done more than one or two heads lads. he did the head on nick on here as NIL9070 who has that norris designs 632 bhp car so deffo knows wot hes doing wont as you put it run off laughing was only giving you another option but do as you want wot the f k do i know

 

Not a dig mate but the way i see it Karls not going to give away all his little secrets of what he considers the top spec stuff and the things he has found out over the years of tuning engines.

Im sure your mate is very capable of producing heads which are spot on and perform perfectly so please dont think i was fully ripping into you just a bit of fun

 

Agree with Beach, i dont think anyone was questioning wether the guy can port heads, just that if its specifically one of Karls exact heads that is wanted its only Karl that you are going to get it from.

 

Exactly

 

fair enough but spence has a few little tricks himself he can do a cracking head for 400 bhp has done a lot at that spec. i know they have thier own little secrets same as secret spec cams

 

I love the way that cams are somehow deemed to be better when they are "secret spec" is it cause it rhymes with "vtec" that actually makes difference that people get confused over?

Half the tuners saying that are just chucking a BDxx in one side and a BDyy in the other side and timing them in appropriately probably anyway, i bet its not even their own grinds

(NOT a comment on Karl i dont know what cams he uses, im just talking generally)

 

I suppoose its all down to what each tuner knows what works best with his work, i do know Karl has cams ground to his requirements but what these are is up to Karl. Each tuner will have different views on this.

I think the problem is that people want head work doing for next to nothing and dont realsise the time and effort these things take.

The secrets and stuff like that i believe are people trying to hold on to there work which i think is totally fair as theres allways someone who thinks they can do it ten times cheaper or betteror even try and replicate other peoples work.

Its like my cylinder head....

Was purchased from A1 Rallysport when the engine was built, its been lightly ported and is fitted with double valve springs.

This may be stg 1 in somebodys eyes, or nothing in someone else's

 

agree with both your comments. spence has shown me his head work and like you said it takes a lot of man hours to get it right. my own head is really over kill for my conversion which is a genuine 400 bhp conversion done by sheady [he didnt do headwork and have since had iskys fitted for new cam which is from sheady to his secret spec ]
it is really a 500 plus head

 

Is it NIL9070 engine that made that power
What speck is that engine ?
What turbo ,
what boost did it make that power at ,
and what was the afr on the power run,
Just curious as it sounds a good engine.

 

I know spence pretty well...and he certainly knows what he's doin!! He built my rst engine and ported the head (not a cossie i know), and has genuine interest in what he's doin cos it's not his everyday job so not relyin on it for his sole income. At the end of the day, there's plenty of people out there who know how to port a head, just gotta pick the person u trust is gonna do the best job!

 

yes mate it is NIL9070 car think its a gt 35 40 turbo not sure on the rest the car is in the daddy thrash article

 

mart!

bear in mind mate as well that as long as karl has the head it will be off the road

so u might need to replace the head if u need to use it, or take the head off somewhere where u can leave the car for a while and drive the head to karls.

its not a drive in drive out job

 

rst dave is right i do heads mostly for people i know not just for the money but because i have an interest in the cars and enjoy developing specs but on the other hand i wouldnt like to port heads for a living because its boring and dirty work but enjoy doing the dozen or so i do at the minute especially when you see the end result

 

your always getting dirty spence. always fiddling with other peoples cars instead of your own still have memories of spence at castle combe when boost hose blew off on the rst and there he was trying to put it back on by the side of track right on the kink of the main straight loony tunes