Hpi's R32

[7yphon]

They are doing a RB24 I would like to know if it's worth it? As I like the RB20 and would like to keep the engine?

[lwells]

Simple answer is no. You can get a lot more bang for buck. A few helpful threads are yielded with a small search:

http://www.skylinesaustralia.com/forums/in...s&highlite=rb24

[paulr33]

rb30 bottom end would have to work out cheaper surely?

[7yphon]

They Helped a little well ok then anybody out there own a RB24 and how does it run

[boj01]

RB24 is made by using RB26 crank and rods yeah?

[blackrb20silvia]

RB24 is made by using RB26 crank and rods yeah?

<{POST_SNAPBACK}>

yeah gtr rods crank and 81 mm pistons either toyota factory semi forged or tomei stroker kit bore out the 20block and also a custom head gasket or tomei head gasket

[7yphon]

Must be pritty cheap then, Also anybody done this and how hard was it?

[Sydneykid]

Must be pritty cheap then, Also anybody done this and how hard was it?

<{POST_SNAPBACK}>

I have all the parts necessary to build an RB24 and I have had them for about 5 years;

GTR crank

GTR rods

ARP rod bolts

ARP main bearing studs

ARP head studs

4AGZE pistons (high pressure cast with ceramic coating)

Total Seal Piston rings

ACL race series bearings

Cometic cylinder head gasket

and a 180,000 ks RB20

All I need to build the engine itself is a Nissan RB20 gasket & seal kit, a set of cams, pulleys, valves, valve springs, solid follower conversion and some machining, inc porting the cylinder head.

But I haven't done it, in that time I have done 2 X RB30's for my own use. An RB30DET using an RB25DE top end and the latest RB31DET with an RB26 top end.

WHY?

Because the RB30 is cheaper to build, cheaper to maintain and much easier/cheaper to get parts for. I can make more power/torque with the RB30 without reving it any more than a standard RB26, so I don't need expensive top end parts, high rpm water & oil pumps, low rpm puilleys for the alternator, power steering pump, shorter diff/gearbox ratios, inlet plenum etc etc. Plus I can do it at lower boost, because the RB26 top end flows so much better. Less restriction at lower boost and higher airflow = more power at lower stress.

It's not the cost of the crank, rods and pistons, they are relatively cheap. It's all the other (costly) things that I need to buy for an RB20 to make the RB24 conversion worthwhile. Stuff that I simply don't have to buy when I build an RB31DET.

I will build the RB24 one day, but just for interest sake, not because it's a good idea.

cheers

Edited October 2, 2005 by Sydneykid

[Angry]

4agze 81mm doesnt exactly give u the full monty RB24 .. its more RB23 .... 82mm Tomei .... must be gold plated inside for the price.. .... pistons....will get u a more truer rb24..... but for the price... 800cc or so more for 1900bucks .. or 680 for 2sets of 4 toyota pistons from factory new. (340 a set) .. isnt worth stressin about. machine costs are the bigger issue .. and head work to suit the combustion chambers to suit the new bore.

i got over going rb24.... going Rb25.... cheaper.

Matt