Gtr Redline

[donkey]

hey there,

im looking to getting my r33 gtr engine forged, just the basic package, pistons, jun pump, cams, crank attention etc, running 2860-5, and usual upgrades.....

what would the average person out there who has the similar package set there rev limit too?

im sure my mechanic will set it too what he thinks, but just keen to here some numbers

cheers

[Piggaz]

Ill jump in here early.

Just for arguments sake i have a GT Block, Tomei 2.8 stroker 270 degree procams and GT RS turbo's and I dont rev it any harder then 8000 RPM (with the cutout set at 8500 RPM just so i dont hit it all the time)

After you get it tuned look at where it makes its power. I cant see any need why you would need to rev it any higher then 8000.

[donkey]

Ill jump in here early.

Just for arguments sake i have a GT Block, Tomei 2.8 stroker 270 degree procams and GT RS turbo's and I dont rev it any harder then 8000 RPM (with the cutout set at 8500 RPM just so i dont hit it all the time)

After you get it tuned look at where it makes its power. I cant see any need why you would need to rev it any higher then 8000.

hey thanks for that,

just watching that mines (34 vs. supra) for the millionith time, and dam that gtr still seems to go crazy to about 9k

cheers

[The Dan]

If you are not changing the rods or at least the weak factory rod bolts...leave the rev limit at the factory level. It's there because Nissan calculated it to be that. If you strengthen the rods or rod bolts then maybe add a further 500rpm but realistically it depends on how long you want it to last. Any RB revving over 8000 for long periods every day is going to be short lived....unless you pour a small fortune into development.

[GTR1993]

IMO revs are the second worst thing for a motor, well probably third behind poor tuning and poor engine building. Work out your piston speed and go from there. 8000 is all i would rev a street RB26 to, of course some people will rev more but 8000 will see you enough fines!

[tacker]

i take mine out to 8100 but i have aftermarket valve springs now as the old stock items bounced and i bent a valve at 8100 play it safe and run more boost not revs

[donkey]

If you are not changing the rods or at least the weak factory rod bolts...leave the rev limit at the factory level. It's there because Nissan calculated it to be that. If you strengthen the rods or rod bolts then maybe add a further 500rpm but realistically it depends on how long you want it to last. Any RB revving over 8000 for long periods every day is going to be short lived....unless you pour a small fortune into development.

hey def doing rod bolts too.....

cheers

[den001]

If you are not changing the rods or at least the weak factory rod bolts...leave the rev limit at the factory level. It's there because Nissan calculated it to be that. If you strengthen the rods or rod bolts then maybe add a further 500rpm but realistically it depends on how long you want it to last. Any RB revving over 8000 for long periods every day is going to be short lived....unless you pour a small fortune into development.

please explain what a small forutune is, i plan to rev mine to 9000rpm, and i have gone to a fairly full house extent....

[rev210]

please explain what a small forutune is, i plan to rev mine to 9000rpm, and i have gone to a fairly full house extent....

fairly full house ?

or

full house?

I'd say part of the way there is;

* Jun/Trust oil pump + long snout crank + decent balancer

* crank girdle and head stud upgrade

* Oil gallery mods

* Sump extension/ baffles + rear oild drain

* decent balance of everything

* valve train , titanium retainers / beefy springs etc. (with the right clearences) valve guides etc..

* pistons/ rods /bolts

Edited January 4, 2009 by rev210

[den001]

i have 272 10.2 cams in and out,

jun pump

big port work

he sump

stud kit

ati balancer

pauter rods

cp pistons

custom gudgeon pins

o/s valves

hks springs

mnodified stock crank, snout and grubscrewed

oil mods

jun retainers

all blueprinterd and fully balanced

why wouldnty i be able to turn this to 9000rpm???

[GTR1993]

What are the seat pressures of the HKS springs? I bought some for a SR20 and they were absolute garbage.

[rev210]

i have 272 10.2 cams in and out,

jun pump

big port work

he sump

stud kit

ati balancer

pauter rods

cp pistons

custom gudgeon pins

o/s valves

hks springs

mnodified stock crank, snout and grubscrewed

oil mods

jun retainers

all blueprinterd and fully balanced

why wouldnty i be able to turn this to 9000rpm???

Some good bits. Power you are looking at that rpm?

Motors that are regularly seeing 9,000rpm and have what you have also usually are bolted up with a decent size turbo or two. If taken to 9,000rpm they usually are pumping lots of horses worth of air and that just means everything becomes one big consumable in time. At least having a spare block and the rest doesn't hurt.

If you are needing to take the motor to 9 for gearing reasons then obviously lopping off/limiting the power is helpfull for longevity.

If the motor is clearenced well and built properly, that short list of parts should help you go there a few times.

[den001]

im goin t04z but mabey a .96 rear, i wana run 9's , its goin into my s15, manual....

dude in bankstowen built the motor,

proform is the name..

[Travis Trayhern]

dont ya love it when ya see those ebay chips that raise ya rev limiter to 9,000rpm hahahahaha

[krzysiu]

dont ya love it when ya see those ebay chips that raise ya rev limiter to 9,000rpm hahahahaha

Ill take 2 so i can rev to 18,000rpm and also attach my new ebay VTEC controller and set vtec from 2000-18000rpm. They youz will all DIE!@@#@!

[T04GTR]

depends how long you want the oil pump to last or break in half. evan with a "good" balancer.... id say safly to 8500. if you have an external oil pump the sky is the limmit so long as the valvetrain can keep up.

its just keeping the oil pump together is the only real factor limiting you.

[R31Nismoid]

You say -5's... then T04Z half way through the thread

which is it?

-5's wont need 9000rpm

[The Dan]

You say -5's... then T04Z half way through the thread

which is it?

-5's wont need 9000rpm

The more time you spend at 9000rpm the higher the street cred.

Good point on the -5's too. 7500rpm will run them out to capacity more often than not. Just crank them up to 2 bar to get the power you want.

[Beer Baron]

for your engine and turbos 7800rpm is plenty.

ask your engine this. do you want it to be here for a good time or a long time? you can't have both. if you don't mind the odd wallet breaking rebuild then rev it to 9,000 all day long (though your peak power will have been passed at about 7500 if that). if you really want it to last keep it to 7800. that still gives you plenty to play with, with some small-ish low mounts as from 4,200 and up the party should be going.

[bubba]

You say -5's... then T04Z half way through the thread

which is it?

-5's wont need 9000rpm

donkey mentioned -5's

den001 was talking about a T04Z on his 30 and reving to 9000rpm

Edited January 12, 2009 by bubba