smudge2031
Well-Known Forum User
Hi, I need my p90 head proted and was needing a bit of advice of who to go to to get it done......quality and cost...who is the best??...thanks
-
The Z Club relies on the support of it's paid members - join the club or renew your membership here.
Head porting....whos the best value for money...UK
- Thread starter smudge2031
- Start date
Turn & Burn
Club Member
I've just spoken to Rob Jarman about this, as I want a head done too. I wondered if he would still be interested. Basically he said that there was nothing too clever in porting these heads as the ports are already oversize and any useful tuning shop should be up to it.
3 angle valve seats, smoothing up the edges in the ports, unmasking the valve guides, matching the inlet manifold, were the main pointers.
I was going to speak to some of the tuners I have used in the past for Vauxhall and Ford stuff to gather their thoughts.
Cheers
Andy W
3 angle valve seats, smoothing up the edges in the ports, unmasking the valve guides, matching the inlet manifold, were the main pointers.
I was going to speak to some of the tuners I have used in the past for Vauxhall and Ford stuff to gather their thoughts.
Cheers
Andy W
smudge2031
Well-Known Forum User
OK, well keep me in the loop if you have any luck etc....I am really wanting someone to build my engine also....what I want is...L28, forged rods and pistons, P90 ported head, race damper bearings etc... triple 45's and a 11.5:1 compression ratio......who would you suggest??
SeanDezart
Well-Known Forum User
Dave Jarman.
With that porting described by Turn & Burn, although good, you'll have a CR in the high 7s or low 8s. So you'll then need a good few mm taken of the head to get the CR you want, and then you'll need cam tower shims to lift the cam sprocket back up. and then you'll need big lash pads or poss raising the valve seats or using taller valves. OR get a Kameari Twin Idler tension.
Or... more likely consider welding up the chambers to reduce their volume. but this gets more expensive.
I think it all depends on budget, but nothing with strong performance is cheap. I think also if you do some searching on here, you'll find there really isn't a UK turn-key engine builder for L engines. Although Rebello don't seem to actually quite deliver the HP they claim and they are in the US, they do build a lot of strong performance a la carte L engines and I think are probably the best bet for fixed price, guaranteed delivery time, fixed performance.
As a data point on price - I've built my own over bored L28 with spec similar to what you describe and I've spent £7k so far.
Or... more likely consider welding up the chambers to reduce their volume. but this gets more expensive.
I think it all depends on budget, but nothing with strong performance is cheap. I think also if you do some searching on here, you'll find there really isn't a UK turn-key engine builder for L engines. Although Rebello don't seem to actually quite deliver the HP they claim and they are in the US, they do build a lot of strong performance a la carte L engines and I think are probably the best bet for fixed price, guaranteed delivery time, fixed performance.
As a data point on price - I've built my own over bored L28 with spec similar to what you describe and I've spent £7k so far.
Last edited by a moderator:
Usually the case when you speak to an expert who isn't after work. I bet a head worked by you and one worked by Dave would be slightly different.
Alphabettispaghetti
Club Member
would you think it was important to get flow reports, before and after, designed to work with the chosen cam and CR?
Its an interesting topic as i'd like to use an e31 head but the costs of bigger valves with correct seats, crack testing etc etc all add up before its even been touched.
Its an interesting topic as i'd like to use an e31 head but the costs of bigger valves with correct seats, crack testing etc etc all add up before its even been touched.
SeanDezart
Well-Known Forum User
Les Collins is doing some great work down in Ausland. But my next engine (block, internals, head and cam) is being sorted not far from Stroud and I'm not saying anymore unless MZR let me.
I've just got mine back from these people http://www.massracing.co.uk/home/4580266969
In the short amount of time I managed before they started salting the road the car seems to have be transformed.
In the short amount of time I managed before they started salting the road the car seems to have be transformed.
Alphabettispaghetti
Club Member
What have you had done?
smudge2031
Well-Known Forum User
Thanks for all the advice.......Rebello seems the best option.......3.0 stroker engine ready to just bolt in with exhaust, flywheel and clutch $14,000...expensive but probably worth it....
smudge2031
Well-Known Forum User
My car is actually in the US at the moment so I dont have to worry about that....its busy getting a FIA spec cage fitted....rolling shell at the mo......will come to me with a cage, engine and box...and I will finish it here...Tarmac stage rally car build
Alphabettispaghetti
Club Member
what suspension are you going for?
smudge2031
Well-Known Forum User
to be honest havent given alot of thought yet.....coilovers of some description.....who recommends what?
SeanDezart
Well-Known Forum User
Jeez - I hope you've someone good over there 'cos most of 'em know eff all about FIA specs which are far from SCCA etc !!!
Might be able to do you a deal on the header.
smudge2031
Well-Known Forum User
Yes...he is a wizard when it comes to cages.....I actually have 280z SCCA car its cage is actually over specced material compared to the FIA one....thicker walled etc
SeanDezart
Well-Known Forum User
And usually front strut-tower braces etc like Custom cages - all illegal 'chez la FIA'.
Nigel Brook
Well-Known Forum User
I'd be interested to know what spec the shell is, seam welding etc.
smudge2031
Well-Known Forum User
The 280z or the 240z shell? I will post pictures of both when I get the 240 and the 280 out of storage