High reving SR

[drifter_for_life06]

Before i get into it, i searched and came up empty, if you canf ind some info please link it.

I was bored today playing gran turismo and drifting around with my AE86 that revs to 16,000 rpm. So i got to thinking.

Here's my question. How do you get a motor, not just an SR(thats what i want to know though) to rev that high? Is it lightened internals, or something in the head? I am 100% lost on this. Any and all help is greatly apprecaited.

Ryan

[silkk]

i know part of it are the camshafts but i don't know what else you need

[Zydeco]

you also need a very short stroke and narow bore and about 30k in motor mods.

[leftovercrizack]

A square engine... SR is oversquare.

[drifter_for_life06]

so with the camsahfts is the higher the lift the better?

[w1ngzer0]

how did you modify the redline in GT3 without a gameshark...

[nismodave]

I run 7500 rpm max with bigger cams and Better springs on my SR.

16000 rpm?

Only If your name is Schumacher.

[drifter_for_life06]

im not shooting for 16000rpm dave

and w1ngzer its easy, do teh FF challenge in Professional and poof you get a Spoon Civic that redlines at 16000rpm OR do the FR in Ameatur and poof an AE86 that redlines at 16000rpm

[w1ngzer0]

lol sounds unreal for a cyl motor

[Cyberkreig]

A square engine... SR is oversquare.

last i checked 86x86 was square.

[Nismo_Freak]

A square engine... SR is oversquare.

An SR is square...

[Nismo_Freak]

Before i get into it, i searched and came up empty, if you canf ind some info please link it.

I was bored today playing gran turismo and drifting around with my AE86 that revs to 16,000 rpm. So i got to thinking.

Here's my question. How do you get a motor, not just an SR(thats what i want to know though) to rev that high? Is it lightened internals, or something in the head? I am 100% lost on this. Any and all help is greatly apprecaited.

Ryan

Lighter reciprocating mass (crank, pistons (best place to remove weight), rods)Better bolts (head, rod, main, etc.)Better/smaller bearingsLong rodShort strokeHigh head flow (porting, cams, valves)

Fact of the matter is that turbocharged engines will never rev as high as N/a motors without sacrificing alot of reliability. This is because their pistons and rods must be alot stronger to withstand the greater combustion temps and pressures. Heavier the components, the lower the redline.

[drifter_for_life06]

thanks a lot Nismo_Freak. That helped alot. And thanks to everyone else for their input and to go along with cyberkreig i thought 86x86 on the SR was square too? : /

[drifter_for_life06]

Nismo, so would acheiving a high revving engine be easier on a KA than on a SR? that is saying you kept it to an N/A setup

[Duckmeister]

that 16k rpm cant be right its 11k rpm for that 86. it has a black hood and is called (Shingo version) right?

[180fan]

The black hood version is the Shigeno, not shingo. Shingo was that guy in the red EG6 in Initial D who tried to drive Takumi off the road by hitting him lol.

[w1ngzer0]

The black hood version is the Shigeno, not shingo. Shingo was that guy in the red EG6 in Initial D who tried to drive Takumi off the road by hitting him lol.

LMFAO. I don't know why but that was funny :pface

[180crafter]

Random, out-of-the-blue reference to Initial D is always funny. Especially when it comes from the guy who is my biggest fan...

[maxpower]

edit: checkout drifting.com, but a voice within me tells me you're most likely already registered there and a frequent drifter.

[drifter_for_life06]

my Hachi-roku revs to 16k not sure why but it does, i just wish i could get my Siliva K's 2000cc to do that

[RMiller]

Unbelievable.

[Projex240]

the rods dont necesarilly hove to be heavier--they can be titanium. Strong.

The cams would have to be set to a bucket and shim design or a solid roller. You cant rev that high on a hydrualic valve train--it aint gonna happen. Youwill have to have VERY low stroke and as big of a bore as you want as long as its close to square--but square is optimal. Thats whay f1 cars use v8s with about 2500cc motors.2.5 liter V8 is pretty nasty--and f1 cars are turbo--but the replace them after every race. The cars rev to like 12-14k for hours on end.

But for a street car--its not feasable for anything less than the cost of a small home.

lol

Talk about some r&d costs.

[rico05]

A square engine... SR is oversquare.

Ahhhhh. So nice having a CA. Nice and square:) IF you want to revv, get a CA. If you want torque, get an SR. Because of the rocker arm design (as opposed to the cam on bucket of the CA) your valvetrain will hate you if you go over 8k. You will need:

-Cams to breathe at that high if an RPM-Valves that are lighter-GOOD valve springs-GOOD retainers and guides-GOOD head gasket-As light as possible (read Tomei) bottom end, balanced w/ flywheel and crank pulley as well-Turbo that will huff that much air that high in the revv range-Highflow intake plenum, big tb-Injectors/fuel delivery control to be able to cope with all of that-Racing flywheel that is built for high revvs-All of the other ancillaries (read FMIC, ignition, etc to support turbo)

All to see 10,000 RPM.

I'm sure I'm forgetting some stuff, but you get the idea. Basically a Tomei Genesis Stage 3 crate motor (which runs at about $10,000 IIRC w/o manifolds, fuel system, or turbo). If you want 16,000 revvs, get a Group A Spec 4AGE or a Spoon B16B and be happy. Too bad enither of those are turbo or drop in for the S13...

[Mameluke]

you guys should check out the L-Series engines. the crankshaft bearings are very strong and can handle high rpms. modded L-series engines can hit 8000rpm easily and reliably with cam upgrades n such... i dont know if that helps .. meh

[BuudWeizErr]

heres a thought;

gran turismo is a video game. life, on the other hand, not a video game. you do the math.

[wickeds14silvia]

I rev past 8000 on my SR. I think it has to do with my mines ECU having a higher rev limiter.

[rico05]

Have fun with valve float and crashing valves into your pistons.

BTW: My CA has seen 9k before. No sweat.

P.P.S. Also, if you want revvs, get a rotary. I miss shifting at 9k all the time...

[rico05]

you guys should check out the L-Series engines. the crankshaft bearings are very strong and can handle high rpms. modded L-series engines can hit 8000rpm easily and reliably with cam upgrades n such... i dont know if that helps .. meh

Yeah, but sinlge cam, carbourated, and heavy. Not really what most people are looking for in a modern engine.

[BuudWeizErr]

Yeah, but sinlge cam, carbourated, and heavy. Not really what most people are looking for in a modern engine.

L series came fuel injected too

[Onizuka]

Solid pivots, stiffer springs, balanced crank, rocker arm stoppers and no rev limiter.