what do you rev too

[popsy09]

id be wanting to rev it to at leased 7500 or 8 running a tdo5 on a 1.3 lad .as said you find it out quickly on a rr when tunening what best suits the tdo5 on your engine build

chances are i wont be getting it tuned on the rr it will be a road map

 

[billybob]

chances are i wont be getting it tuned on the rr it will be a road map

id running it to 7500rpm if your getting boost ful at 4800 or so

 

[popsy09]

id running it to 7500rpm if your getting boost ful at 4800 or so

that was only 1 bar i will be running 1.6 ,, so will be closer to 5500rpm i would imagine

 

[Sigma]

With the JAM Ecu on the CT9, with a mani & ported wastegate, with raised compression, it's powerful until about 6500, on stock cams.

I think with come big cams in, and maybe a hybrid blower, the 8400 JAM limiter would get used more often.

It sounds evil on the limiter there though, because its soooo high, lol.

What's the standard limiter?

 

[billybob]

that was only 1 bar i will be running 1.6 ,, so will be closer to 5500rpm i would imagine

most of the lads run them round 7500rpm or even 8500rpm on fully forged setups

 

[ALaN]

Usually 7-7.5k sometimes 8 but not often.
I have to laugh at the people that say they don't rev it past 5.5k etc you don't know what your missing, 5k is where mine gets good, that's where the blitz access steps it up a gear with the ignition advance.
When mine was dyno'd it was taken to 7 and the power curve was still rising with a hybrid ct9 lol

 

[popsy09]

well im going to push this as far as i can i want to get the most out of the setup and if revving to 8000 rpm is what it takes then it shall be done ha ha

 

[ALaN]

All you'll really need is uprated valve springs as I'm guessin you'll be using forged rods already.

 

[finx]

Quad Turbo Nuclear Forged 14.5:1 High Comp 5e = Max Torque @ 3760rpm, for the win :shoot:


On a more serious note:

anything much over 8-8200rpm on stock valve springs will suffer valve float.
some of Those aftermarket jap pre tuned ecus seem to have ridiculous rev limiters which leads me to believe (without reigniting the debate over them) that they were not all tuned equal or for a specific turbo or even a stock engine.

have had a few revving to around 7800rpm on all stock internals but its only worth doing so if your turbo is capable of producing power at those rpms and it is specifically tuned to suit.
doesnt matter what some may say ct9s dont enough power at those kinds of rpm to justify it. i have been down that path many times, hybrid or no hybrid the increased size of the compressor wheel doesnt compensate two tenths of stuff all for the puny exhaust wheel they have.
i have see a few set ups that run heavy quantity's of timing at the top end to keep the thing making power up top but all you really do is flatten the curve off instead of it just dropping off the side of a cliff


For those that are not clear:

different rev limits will obviously suit different engines and turbo set ups.
those with larger turbos which have higher lagg thresholds and or cams which come in late will obviously be wanting to maximize their rpm as the set up makes the most power at High rpm when the engine is moving the highest velocity of air VS smaller torqueir or stock turbo set ups which make max power at lower rpm and then flatten or fall off the power curve further up there is no point reving the engine higher as the engine has stopped or is making less power so your only going to keep the same steady rate of acceleration or stay at the same speed.



so combined with the above to answer the initial questions

seems the highest revved engines reach mid 8K
i have seen some inc one in particular go higher but am not going to state how high as it will cause great controversy. dont bother asking me what it was exactly but it was a highly modified and one off engine.


on a stock engine i wouldnt be going over 76-7800rpm personally speaking other may beg to differ. but either way i would not be doing so without a good tune created by a competent tuner, the cams wont be much use higher than that either


on a forged engine, sky is the limit but so is the balance and weight of the rotating mass along with the spec of your valve springs cams and other associated components so you need to consider all of the above then work out where you want to rev the engine to and spec the appropriate parts to suit.


at a minimum over 7800rpm on any E series toyota engine i would be looking at going for some after market replacement valve springs. im not saying (for those who disagree with my statement) that it is not possible to go higher with the stock items but it is defiantly advisable to get some Higher rated and correctly specked replacements if you are expecting to rev higher





cheers
Ryan

 

[bob]

well im going to push this as far as i can i want to get the most out of the setup and if revving to 8000 rpm is what it takes then it shall be done ha ha

thats all wel and good buddy,but have you your botton end fully balanced? and have you aftermarket valve springs? because if you dont have both wel then i wouldnt be reving that hard at all.it puts engine components under serious pressure.

 

[jam]

i have a basically stock 5efhe only internal mod is the wiseco standard bore forged pistons. i rev to 8100 all day every day.:rockon::rockon:

car makes 304 whp at 8000 rpm. looking to retune and make some more power

Hi,what turbo and how many bar you are pushing the 5efhe engine.Did you change valve spring.Thanks

 

[starletjosh]

my bike revs to 16000rpm. but my car i change at about 5500-6000 rpm

 

[y3Lo]

8600 y0 :rockon:

 

[blakchiney]

i think we need to learn from jamica our builds cost 4x the amount of what ye pay , and get the same results



ya surely you can raise it to nearly 8k the jam ecu raises the limit to around that anyway does it not ,they wouldnt do it unless it was safe ??

i think the problem is that you guys underestimate the abuse the stock parts can take.

stock 5efhe cams, stock vavles springs retainers ect genuine HG, oem bearings oem crank oem rods oem rod bolts oem everything. just pistons were changed to wiseco and i think i am the only persn that has ever done that. everyone else uses 4efte pistons.

the trick is to make sure you build the engine properly. before i went to twins scroll turbo my evo 3 turbo was using a na 5e cast iron manifold. even now i am using a evo 9 intercooler. makes no sence paying all that money for brand new everything when u can get used parts off of bigger cars. why go to sard and buy a set off 550cc injecctors when u can get a set from an evo guy for little or nothing. things like these help cut cost down. its not rocket science. and i run ac unlike most of you cause this place hot like hell :haha:

 

[Ted]

i think the problem is that you guys underestimate the abuse the stock parts can take.

stock 5efhe cams, stock vavles springs retainers ect genuine HG, oem bearings oem crank oem rods oem rod bolts oem everything. just pistons were changed to wiseco and i think i am the only persn that has ever done that. everyone else uses 4efte pistons.

the trick is to make sure you build the engine properly. before i went to twins scroll turbo my evo 3 turbo was using a na 5e cast iron manifold. even now i am using a evo 9 intercooler. makes no sence paying all that money for brand new everything when u can get used parts off of bigger cars. why go to sard and buy a set off 550cc injecctors when u can get a set from an evo guy for little or nothing. things like these help cut cost down. its not rocket science. and i run ac unlike most of you cause this place hot like hell :haha:

very few people run sard injectors mate, most are off rx-7s 60 quid a set. was considering twin scroll myself, vf38 or one of those, whats your spool up like?

 

[Dan3SGTE]

Used to rev my stock 4E near to the limit and found that to give best performance. I had it for a year and drove it to hell and that was definitely how i got the best speed out of it. Most cars ive driven like to be revved near the limit. Thats my method.

No wonder so many starlets are slow, people arent revving them :haha:

 

[popsy09]

Used to rev my stock 4E near to the limit and found that to give best performance. I had it for a year and drove it to hell and that was definitely how i got the best speed out of it. Most cars ive driven like to be revved near the limit. Thats my method.

No wonder so many starlets are slow, people arent revving them :haha:

lol , revving to 5500 and 6000 is a load of bull if you ask me why have a rev limit if your not going to use it it was put there by toyota and i think they know what there doing

 

[Rory]

Rev limiters are there to prolong the life of an engine, not to aid in performance.

Every car is diffirent as to how they drive, some like to be reved right up there, some dont.

Me, i change when i feel the torque dropping off, regardless of revs.

On a standard setup, after 6k, its all noise and no go

 

[Dan3SGTE]

lol , revving to 5500 and 6000 is a load of bull if you ask me why have a rev limit if your not going to use it it was put there by toyota and i think they know what there doing

Ill drink to that :beer:

Some need to rag the hell out of their cars! Go to santapod for a day and it will be rare to see starlets doing well, after reading this thread i know why :haha:

 

[popsy09]

Rev limiters are there to prolong the life of an engine, not to aid in performance.

Every car is diffirent as to how they drive, some like to be reved right up there, some dont.

Me, i change when i feel the torque dropping off, regardless of revs.

On a standard setup, after 6k, its all noise and no go

on a forged setup on a big turbo in my case i need to raise it as my boost is not coming in till late thats what i would like to find out what can i raise it too , i think the thread took its own path lol