Garrett gt30 500hp bb on rb20???

[R31Nismoid]

eek microtech

[discopotato03]

I think an RB20 would stand up to harder use than an SR20 and keep coming back for more . Correct me if I'm wrong but an R32GTST would weigh more than the S13's and is probably a better handling car .

The valve train on SR20's is not intended for high rpm use , Nissan went through LOTS of engine development with SR20's for the 2 litre super tourers .

From memory the head was turned 180 degrees , the cams reversed , special brackets made to stop the rockers going postal . The bore stroke and rod stroke ratios were nothing like the production engines . There was not much Nissan about the finished block either .

Possibly the question being raised is how each engine performs in standard tune . The SR20 having larger pots (capacity wise) may feel a bit more willing at low revs , but a bit further up I reckon the RB would anihilate it . With the smaller pots the RB20 may have more to loose with back yard tuners and their "she's sick mart" ways of doing things .

My money would be with the RB20 out of these two every time .

Cheers A .

[cameron]

Currently on the R31 forums there is a R31 for sale with RB20 (R32) with Modified GTR exhaust manifolds and turbos.

Modifications:

Twin turbo (gtr turbos and exhaust manifolds)

Microtech LT8 with handset

Double dump pipes of each turbo

Large FMIC (gtr size)

2 bov plumbed back

3in high flow exhaust (new cat.) chrome magnaflow exhaust tip

High quality water and oil lines for turbos

700hp rated in tank fuel pump

Malpassi fuel reg

"Makes full boost round 4-5000rpms running bout 10 psi."

Microtech -Theirs the problem right their!

Microtech are good but its either Big HP no good drivability or No HP with drivability. Ever car i've seen fitted with a microtech has gone backwards, run's like sh!t, has missfire's & hesitation's. - CA18's & RB20, RB25's - still to this date I havn't seen one car that actually goes half decent with this ecu. And the wiring in it..... well thats a whole new story :uhh:

sorry bit off topic!

Jun

[Sydneykid]

Microtech -Theirs the problem right their!

 

Microtech are good but its either Big HP no good drivability or No HP with drivability. Ever car i've seen fitted with a microtech has gone backwards, run's like sh!t, has missfire's & hesitation's. - CA18's & RB20, RB25's - still to this date I havn't seen one car that actually goes half decent with this ecu. And the wiring in it..... well thats a whole new story :uhh:

 

sorry bit off topic!

 

Jun

The Microtechs work great on rotaries, have had no problems. Don't know if that's good or bad though. :wassup:

[Sydneykid]

i am very serious. that many SR's around now making good power, with better driveablily to the RB20.

None of which have had any block problems to the day.

That would be because S14 and S15 owners spend more money on SR's than R32 GTST owners spend on RB20's. I reckon its got diddly squat to do with the basic engine structure. Let's face it, an S14/15 owner can't stick an RB25/26/30 in as easily as an R32 GTST owner can. That's why you don't see many big power RB20DET's, you can get a much more powerful RB25/26/30 for the same upgrade cost.

I can easily stick a standard RB26 crank, with forged RB26 rods and a set of forged pistons into an RB20 for 2.4 litres, rev it to 10,500 rpm with 2.5 bar of boost. You can't do that with an SR20, the valve train won't handle it for a start.

I work on 3 X SR engines in the SuperTourers (refer picture below) and I can assure you that there is very little SR left in them. Everything has to be upgraded.

[pnblight]

Its a bit funny got basically same discussion going on in two different threads

Out of interest Sydneykid what sort of rwhp could be extract from a Rb24det(rb20)

as im a bit of a fan of the littler known rb20 and ca18 and wouldnt this configuration responsed well to (larger single) or twin turbo, because of it's the long stroke(rb24dett) and displacement now your talking cheap rwhp yeah lol

[Sydneykid]

Its a bit funny got basically same discussion going on in two different threads

Out of interest Sydneykid what sort of rwhp could be extract from a Rb24det(rb20)

as im a bit of a fan of the littler known rb20 and ca18 and wouldnt this configuration responsed well to (larger single) or twin turbo, because of it's the long stroke(rb24dett) and displacement now your talking cheap rwhp yeah lol

Copied from that other thread...........

I was talking to a friend in Japan last week about RB20's and he was at a HKS drag meet last year where an RB20 powered R32GTST did a 9.9 at 139 mph on radials. It used HKS drag fuel (Elf TurboMax) with no nitrous. It was a 2.4 litre with a T51 ball bearing turbo, not drastically lightened, road registered of course. Punch those numbers into the drag calculator and it says 575 to 600 bhp. That's pretty damn impressive.

PS; he has pictures and will find out which workshop it was from.

[R31Nismoid]

I can easily stick a standard RB26 crank, with forged RB26 rods and a set of forged pistons into an RB20 for 2.4 litres, rev it to 10,500 rpm with 2.5 bar of boost.  You can't do that with an SR20, the valve train won't handle it for a start.

indeed you can, but then your not dealing with an RB20 anymore are you

good discussion

[Sydneykid]

indeed you can, but then your not dealing with an RB20 anymore are you

good discussion  

So if I stick Carillo rods and JE pistons and Jun valve train in a SR, it's till an SR? What about if a stick a Jun 2.2 litre stroker crank in the SR, is it still an SR then?

The differences (between RB and SR) are all about the number of cylinders, the block composition and the valve train actuation. And the RB20 is demonstrably superior on all counts when you are talking RPM and turbo charged power handling capacity. SR's are lighter and RB's are cheaper, but that's not the point of this discusion.

[R31Nismoid]

I thought we were talking 2litres in this particular thread.

The whole RB20. Mark made no mention of ripping out his motor and stroking it.

If we are going to talk about stroking motors and stuff, then the ball game changes in soo many ways

[discopotato03]

Hello Gary , if you have the time can we please have a brief run down on the efforts taken to morph an SR20 into a race engine . I believe its truly a case of engineering over design- but on a moonshot budget .

To get the same power out of an N/A RB20 surely would cost peanuts by comparison .

Cheers A .