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Gtir Motorsport club » Tech room » Help and Advice » porting & polishing in the midlands?

porting & polishing in the midlands?

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1porting & polishing in the midlands? Empty porting & polishing in the midlands? on 6th January 2016, 8:26 pm

Cosmic73

Cosmic73
While my heads off at the engineers having new guides fitted etc i thought id get a price for porting and polishing,
They came back with £580 affraid

So question are;
1. Is it worth it?
2. At almost 600 notes are they extracting urine from me?
3. Anyone know of a good place near Coventry?
Very Happy

2porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 6th January 2016, 8:34 pm

nomad

nomad
Admin
Admin
Ask gostek he loves a good head job yoursofunny .... check luke s thread in  members gtirs ...


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3porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 6th January 2016, 9:04 pm

pulsarmoley

pulsarmoley
moderator
moderator
If done right is worth the money depending on what you want from the car. On the other hand the money could be spent elsewhere to improve the car.


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4porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 6th January 2016, 9:20 pm

Gostek

Gostek
Events Organiser
Events Organiser
Pm'd you mate


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5porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 7th January 2016, 7:49 am

Mr B

Mr B
gtir technician
gtir technician
Not worth it for your spec build, money & effort better spent elsewhere or saved.
You would be best getting exhaust manifold ported & investing in a 2.75 or 3" turbo elbow as serious gains here & only set you back around £250, you could match/taper the head exhaust ports & gasket to manifold too, can do that yourself with palm grinder . Could even do the exhaust manifold yourself if fancy it .

6porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 7th January 2016, 11:34 am

Cosmic73

Cosmic73
Sounds like sound advice as always MrB,
Smile

7porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 7th January 2016, 3:57 pm

Mr B

Mr B
gtir technician
gtir technician
^ just concentrate on the known weak point & things that troublesome do with engine/box back in.
Exhaust manifold & especially elbow make good gains for little outlay, having a crack at the exhaust manifold could be bit of fun too . I would suggest spending  funds also on decent clutch such as something from Competition Clutch such as CC stage3 segmented 8pad sprung or stage 4 6puk sprung if think you will do fair bit of track or play on drag strip, add a reinforced clutch fork if not got one already & new release bearing. Doing that keeps it strong & trouble free & very versatile for road or track & also handle more power easily should you want it .
drifting a bit from topic so sorry about that :-)

8porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 7th January 2016, 9:12 pm

Cosmic73

Cosmic73
Would a tubular exhaust manifold have the same effect as a polished stock manifold?
I saw this on shitebay;
http://www.ebay.co.uk/itm/Nissan-Pulsar-Sunny-GTIR-GTI-R-AUTOBAHN-88-TUBULAR-MANIFOLD-SR20DET-/321966925030?hash=item4af6b964e6:g:gecAAOSw7FRWYfdu

9porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 7th January 2016, 9:14 pm

Gostek

Gostek
Events Organiser
Events Organiser
@Cosmic73 wrote:Would a tubular exhaust manifold have the same effect as a polished stock manifold?
I saw this on shitebay;
http://www.ebay.co.uk/itm/Nissan-Pulsar-Sunny-GTIR-GTI-R-AUTOBAHN-88-TUBULAR-MANIFOLD-SR20DET-/321966925030?hash=item4af6b964e6:g:gecAAOSw7FRWYfdu
Everybody here will tell you that they're more trouble than they're worth. They flow and look lovely but welds crack after a while...


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10porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 7th January 2016, 9:54 pm

shroom

shroom
moderator
moderator
Yeah those exhausts manifolds are shit. Most of them crack some get away with it but sometimes they just dont see the crack! Absolute rubish. As Mr B said spend the money on the known restrictions i.e elbow and downpipe sorted and port mani yourself job done and a lot cheaper.

Keep things simple dude dont get going ott or you will struggle in the long run.


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Now Shagging sheep on the cheap
You wont find one that's for keeps
Spend the money, find a honey

'Shit' think I need to sell my Sunny!

But woman cant replace a sheep
Oh I wish that for the peace!
But I really cant find my honey
The only one I would give my money
Is one with a great big fleece
And then I would be at peace...

11porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 7th January 2016, 10:23 pm

Cosmic73

Cosmic73
Top, top advice chaps,
Thanks
you the man

12porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 8th January 2016, 6:49 am

Mr B

Mr B
gtir technician
gtir technician
Standard manifolds are quite good & with a bit of porting quite usable for 400hp, decent tubular will be big money, cheap ones are junk. You can make the standard manifold look quite nice by dumping standard heat shield & wrapping it super neat in black/grey heat wrap, rob IW done this on his & looks real good .
Due to you having a quaife & engine will have good piston I think some time down the road you may want little more than 300hp so cover few things so a power increase to say 350-380 is minimal hassle ...

13porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 8th January 2016, 11:54 am

Cosmic73

Cosmic73
Yeah i like the idea of keeping it below 300 for long term reliability but knowing it's got the inner strength to boosted if things change in the future.

14porting & polishing in the midlands? Empty Re: porting & polishing in the midlands? on 8th January 2016, 3:31 pm

Mr B

Mr B
gtir technician
gtir technician
with what you got 380hp could be reliable if engine proves good & you get it mapped proper.
waste of a quaife & forged pistons at 300hp, i've run over 360hp on standard engines & gearbox without bother for years, most of the issues are big power on high mileage engines & gearboxes or ones built badly mixed with sensor faults, vac line issues, oil feed issues & bad mapping.
Makes sense start off round 300 range then once car proves itself & you feel need for some more just add a better turbo & electronics for a reliable, safe & easy 360/380ish .

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