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Rb30 Head On 25 Block

pf.

By pf.,
in Engines & Forced Induction

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pf.

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Posted (edited)

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.

I don't mind having less power if I can use the power I have IE: racetrack style torque profiles.

I have seen rb30 heads that flow enough for 330hp which would want my engine to spin at about the mark I am looking for 8k which is where I will be shooting.

My engine stand comes soon dedicated to this build pistons are next $700 ill be contacting crankshaft rebuilders for a price to do the crank and I am thinking 26 rods.

The head is back to me before machining so I can work out belt's and other little things a mate just blew to 30's at the mattsuri comp so ill be having one for bolts and other parts.

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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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MBS206 Grand Master

MBS206

Posted
Posted

Like a turbo car.......?

Nothing like a turbo car. The power will actually be instantaneous. If you have a turbo that comes on only over 4K, even once you're over those revs and stand on it, it takes time for power to appear. Sounds like some people may be surprised at how much a very driveable lower powered engine can still pull a lap time down.

89CAL Grand Master

89CAL

Posted
Posted

I know, I used to have a cammed RB30 NA. Power and Torque was nice. Not blowing anything away but it was a nice delivery.

I'm just saying, theres a reason why car/engine manufacturers are going DOHC or Quad cam when in V configuration. Just remember there is no VCT with the RB30 head

But anyway, I'm not going to say anymore. Advice has been given, noone is forced to take advice, and thats fine. Everyone is entitled to their own opinion etc.

mad082 Grand Master

mad082

Posted
Posted

i actually meant the 5.5l new small block lol

But that is a smaller engine with new tech. A bit like how the rb25 was better than the rb30. However in this case the op is taking the smaller, newer engine and bolting on the old tech.

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