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Rb30 Head On 25 Block

pf.

By pf.,
in Engines & Forced Induction

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mad082 Grand Master

mad082

Posted
Posted

Yeah but emissions laws are constantly changing these days, so it's hard to directly compare things. Not to mention what an engine it's designed for. An engine designed for a suv will have different outputs to something designed for a sports car. But I do get what you are saying.

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mad082
mad082

Just without the power.....

89CAL
89CAL
MBS206
MBS206

its probably uni holidays.Someone claims they know what they're talking about in building engines... Still wants advice off "backyarders" on how to build engine... Lol

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pf. Explorer

pf.

Posted
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Posted

Ok I have been going slow with the build I got the head back before machining to bolt it up the block is in my backyard atm I just setup my engine stand at work so I will be taking photos soon.

I will make a new thread soon and leave this one here for tech discussion.

I will say a engine needs air fuel and spark it gives no farks for how many valves are delivering the air/fuel to it. My head can be flowed for 350hp with 1mm oversized valves so I roughly know that it will need to spin at 8k maybe a little more to make that. My cam choice will be made for about 8k with a 2.6l (due to bore size) engine at 8k I think I will need to limit power to about 320 330 to stay just under 8k rpm.

There is also the points that I made earlier in the thread about the 2v head being vastly cheaper and easier for me to work with. If you have not make sure you read the quotes on the first two pages as these points made by a pro engine builder are quite true.

The build thread will start when I get time to move my engine the head is bare so ill just be mocking up for a while. I also don't have much cash so progress will not be overnight :)

discoPumpkin Community Regular

discoPumpkin

Posted
Posted

My cam choice will be made for about 8k with a 2.6l (due to bore size) engine at 8k I think I will need to limit power to about 320 330 to stay just under 8k rpm.

oh cool, yah u don't wana make to much power with this NA build..

pf. Explorer

pf.

Posted
  • Author
Posted

oh cool, yah u don't wana make to much power with this NA build..

If I was aiming at say 10k I would be better off using the 25 or 26 head as the air speed of the ports would favour dual valve intakes. This would also increase costs immensely as I would not only need to spend more on the head but also more on the rotating assembly as I would *want* a fully counterweighted crank. Revving the engine into 10k and past territory would also mean I would need to spend alot more on the gearbox for a small percentage gain over a much cheaper 8k rpm build.

HR32GTS 4DOOR Community Regular

HR32GTS 4DOOR

Posted
Posted

oh cool, yah u don't wana make to much power with this NA build..

Dude come on Leave the guy alone. He is willing to try something different and put it up here for us to see. Im keeping my opinions on this to myself and im actually keen to see what this does as its different to the usual rb25 with a gt3076 etc we get on here.

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discoPumpkin Community Regular

discoPumpkin

Posted
Posted (edited)

Dude come on Leave the guy alone. He is willing to try something different and put it up here for us to see. Im keeping my opinions on this to myself and im actually keen to see what this does as its different to the usual rb25 with a gt3076 etc we get on here.

...................

.........

I also don't have much cash so progress will not be overnight :)

and i rest my case... Hes a nice guy and hes motivated i'll give him that but hes spending alot of cash for im afraid almost no gains in power, what 155rwkw? holly bannanas thats nothing, but will wait and c the outcome incase he proves us wrong with 160rwkw, until then i'll sit in silence and admiration

Edited by discoPumpkin
discoPumpkin Community Regular

discoPumpkin

Posted
Posted

My car made 109rwkW (@ like 4,500rpm lol), standard RB30E with a GTS1 cam and GTS2 extractors.

Don't underestimate the power of the RB30E!

except hes going down to a RB25E, so it should fry the tyres even more so then the rest yolo

Stock e-Tune Contributor

Stock e-Tune

Posted
Posted (edited)

without me sifting through the pages of opinion,

I'd like to say if you go the easy route and use a RB30 ECU I will set a tune up for you to get it running well.

If you want to go Nistune, I can do that also.

need a shorter timing belt no doubt.

What wiring loom were you planning to use, as the RB25 one is substantially different to the RB30 one which you will need unless aftermarket ECU?

btw, the RB30 is a good head and capable of as much horsepower as anything else. cam and a stally or 25-manual box will make for a nice combo.

Hi all what would be the go with this what would I need to mod the head or the block? Also how and what would I do to do this.

Also I do not need anyone telling me to use a 25 head there is reasons why I am doing this I could work it out myself but want to fast track the process.

Thx for helpful responses in advanced.

Edited by Stock e-Tune
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

I am a mechanic guys I have been involved with and have driven very fast cars I want a turbo yes but I don't froth over turbos like some.

A Mechanic that drives this...
http://performanceforums.com/forums/showthread.php?67270787-dyno-s-car

shanes028.jpg

PF = performance forums?

Pretty much yeah

http://performanceforums.com/forums/member.php?52013-dynoryder

Stopped getting attention over there, came here... Awesome...




Ah it's good to be back :action-smiley-069:

Captain Natro Grand Master

Captain Natro

Posted
Posted

yeah the guy is full of shit, but kept PF entertained with his retarded antics for a while. Ash can you now move this to the Wasteland?

I am full of disappointment as to how this thread turned out... Wasteland

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