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Piglet's Rebuild Of His Busted Tomei 2.8

Piggaz
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Piggaz
Piggaz

Car is finally booked into Insight on the 19th of April for the ECU, fuel system and sensor wire in plus the tune. Thats the good news. The bad news is that V-cam aint gonna fit with my pistons and ho

Piggaz
Piggaz

Small update.... ITS RUNNING. Fired first go! Smells like burnt dust apparently .

Piggaz
Piggaz

A 9174 would just make the EGP pressure issue worse and in my mind it seems like a bit of a GT RS shit going on. Not that it's horrendously bad (It wouldn't be no twin buttplug pressures), That's NOT

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bigmikespec Veteran

bigmikespec

Posted
Posted

Well its a carbon copy of Elrodeo666's head which was good enough for 445 kw at 1.4 bar on -5's.

Have a look at the inlet ports on Brad's engine (SHOWOFFR32)... that is what they should look like.

Piggaz Grand Master

Piggaz

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Have a look at the inlet ports on Brad's engine (SHOWOFFR32)... that is what they should look like.

BRB. I'll go tell the bloke that ported the HKS drag car that he did it wrong.

bigmikespec Veteran

bigmikespec

Posted
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BRB. I'll go tell the bloke that ported the HKS drag car that he did it wrong.

Go ahead... All I am suggesting is that the port looks polished from the photo.

To enhance mixture quality it is better to have a textured inlet port surface, especially considering you have massive injectors that wont atomise very well.

Piggaz Grand Master

Piggaz

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Well they proberbly are. But considering the guy has built mild to wild RB's day in and day out for the last 20 years, there must be a reason why he has done what he has done. Who know's what that reason is. I'll ask him in two weeks time when Marcus will sit him down and call me from Japan.

elrodeo666 Mentor

elrodeo666

Posted
Posted

Have a look at the inlet ports on Brad's engine (SHOWOFFR32)... that is what they should look like.

The guy in Japan who has done all the port/polish and r&d on the head has built more high powered full race engines, 9 sec drag engines and drift spec engines then most porn stars have ever had roots.

And yes its polished as well. Why..you'll need to ask him about it but as one of Japans top engine builders who has built 100's of high spec engines, I think he has a resonable idea of what he's doing.

But hey everyone has their opinions.

And Paul its 445kw @ 1.3bar

GTRNUR Grand Master

GTRNUR

Posted
Posted

The guy in Japan who has done all the port/polish and r&d on the head has built more high powered full race engines, 9 sec drag engines and drift spec engines then most porn stars have ever had roots.

And yes its polished as well. Why..you'll need to ask him about it but as one of Japans top engine builders who has built 100's of high spec engines, I think he has a resonable idea of what he's doing.

But hey everyone has their opinions.

And Paul its 445kw @ 1.3bar

Just to be clear, your talking flow from a polished port vs fuel atomisation from a rough cut port right?

I figure the rate that Paul's car drinks E85 it probably won't make a lot of difference when its on song. Its not as though there are a lot of injector options to provide a streetable 2lt/min injector flow. The value of optimising fuel atomisation from porting/polishing methods could probably be weighed against the options available for injector spray patterns for similar effect.

elrodeo666 Mentor

elrodeo666

Posted
Posted

Just to be clear, your talking flow from a polished port vs fuel atomisation from a rough cut port right?

I figure the rate that Paul's car drinks E85 it probably won't make a lot of difference when its on song. Its not as though there are a lot of injector options to provide a streetable 2lt/min injector flow. The value of optimising fuel atomisation from porting/polishing methods could probably be weighed against the options available for injector spray patterns for similar effect.

Theres more going on with this head than just a port /polish job.

Been all machined up at Naprec to HKS race specs and then some custom work by HKS.

It has been designed purely for response and slamming his arse hard back in the seat and fro getting around a track nice and quick.

Pauls head has a bit more done to it than mine and has been built to handle 600~650kw if he ever chooses to go down that path.

Anyway this is Pauls build so wait a few weeks and he'll let you see whats what and at the end of the day it all comes down to what it does when it's all bolted together and tuned properly.

It will be interesting to see how it all ends up..

Hopefully one day maybe a V-cam and those new turb's that Gav has, it would be quite an animal.

r33_racer Grand Master

r33_racer

Posted
Posted

Unfortunate about the old engine!

But it will certainly be interesting to see how this new setup performs in relation to the old setup. Especially with the addition of the new head. What sort of port job was done to the old head?

My mates car runs low 9's with a near std head, ports are just cleaned up. Makes about 880rwhp. What bigmikespec has said holds true, port finish 101 regardless of head type or setup usually doesn't go any finer finish then 80grit. Polishing the surface slows air speed and ruins mixture motion through the port. But maybe this particular guy has a formula that works for him and it goes against the theory that everybody else in the world works around. It will be interesting to see if it makes a difference or not.

Gotta keep an open mind about everything!

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