R33 Rb30 Conversion

[GTR-Ben]

I guess people have different meaning for "blueprinting" to me it means removing any ruff surfaces etc..

[Spoolup]

It involves all of the above. Deburring to minimise stress points, checking all clearences throughout the engine, calculating final compression ratios , balancing rotating mass etc. All of this and much more is involved

[Alf]

Spool up is correct.

Blueprinting is simply machining it exactly to spec - or as close as possible, rather than accepting a part that is "near enough" because it falls into the tolerance band.

[dnb]

i just got my stuff back from the machinist.

cant wait to build it!

also theres the extractors im making

[ace_nz]

i just got my stuff back from the machinist.

cant wait to build it!

also theres the extractors im making

Are those rods small block chev modified to suit?

[Cubes]

wow.. what comp ratio are you going for.

With those pistons you will be around at least 7:1.

[dnb]

yes they are smallblock rods modified.

the pistons are wiseco off the shelf items and they say you get between 8.2 and 8.5 c/r

i have set the deck height to zero

[Cubes]

Give us the part number of the pistons, rod length and bore.

I will work out the approx comp ratio.

I am 99% sure you will not have a 8.2-8.3:1 comp ratio.

The only pistons Wiseco sell off the shelf that have a dish are the RB30DET pistons. They give a 7:1 comp ratio. All the others have a 14cc dome.

Obviously you will have a little more comp ratio if you have a zero deck height.

BUT that will depend on the rods and how much you can deck the block if it is indeed possible to get the zero deck clearance you are after when combined with the compression height of your pistons.

[dnb]

well i was told that!

mine are the m865 ones

hmm, i may have to lower the deck height as far as i can. i have tomei poncams aswell.

ill see how much clearance i have there.

how do you get the full lift with no oil pressure to test the clearance?

[Cubes]

Tell me the specs on the rods.. Are the EXACTLY the same size as the rb30 ones?

[dnb]

Tell me the specs on the rods.. Are the EXACTLY the same size as the rb30 ones?

well i have the same deck height as normal rods would have.

ill do some precise measurements tomorrow.

they are 6" chev rods

[dnb]

any idea on getting full valve lift with no oil pressure?

i need to check the piston to valve clearance

[Alf]

Tell me the specs on the rods.. Are the EXACTLY the same size as the rb30 ones?

I'd be interested too.

DnB the rods look identical to the ones I have, SCAT modified chev rods.

The SCAT rod looks to be approx 1mm longer than the stocker.

Mine require a thicker rod bearing which needs to be chamfered to fit. I havent had it fitted/measured yet.

[dnb]

check this link. i have a thread on it over on our rb friends site calaisturbo

http://www.calaisturbo.com.au/showthread.php?t=30077

did you measure that with the standard chev little end bush? its bigger than the nissan one so it would measure longer if you went overall measurements rather than centres

[Alf]

did you measure that with the standard chev little end bush? its bigger than the nissan one so it would measure longer if you went overall measurements rather than centres

NO, the rods had bushes fitted to handle 1000hp plus for an rb30 when I bought them.

I bought the rods through a mates contacts, he works at Gold Coast Porsche.

I put the scat rod against the stock rod and compared it by eye.

[dnb]

well the rods are good for around 1000 hp or so in v8 form so thats 750hp in 6 cyl form.

[dnb]

any idea on getting full valve lift with no oil pressure?

i need to check the piston to valve clearance

anyone? please

[Cubes]

No idea.

I had the same thought when my engine builder checked the clearances.

[ace_nz]

use a bunch of feeler strips to take up the preload in the lifter then rotate the enginel, or make up a solid lifter, just machine up a solid center to go in the bucket.

[RB30-POWER]

Just a couple of quick questions,

Does the RB25DET oil cooler bolt straight to the RB30 block, or is it different somehow, maybe the filter bypass valve is different or something?

I haven't removed it yet for actual inspection myself, but im sure someone would know?

Also what is this extra drain for, i assume oil? Should i extend the line and plumb it into the sump?

Because I have seen a few conversions where this line has just been crimped shut, therfore no drain, is it critical.

Once again I havent removed it yet for actual inspection.

Cheers for any help