A question for who has TTE rods in his engine, and is using the car in track and not for 10-seconds "races":
where did you put your rpm limitter?

I'm asking because last Sunday I used for the first time the car in track after the latest mods, and at 7600 it's still pushing fecking hard...

Wolf

_________________
Wolf_Tm
TM 250 enduro 2 stroke
GT-four ST205 Snowy White with selfmade 3SGTE v4.1 - [2.34kg/bhp DynoDynamics]
http://www.youtube.com/WolfTm250
http://www.facebook.com/wolf.tm

I've got TTE rods but decided not to fit them as my engine spec is now 500+bhp. I've used Carillo rods instead. The TTE rods were designed for rally use (~400bhp @ ~7000rpm) so I wouldn't be confident of using them in an engine built for circuit use where the rev limit and power output is higher.

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Mmm... I'm using them till 2007 and never had a problem even if my bhp is MUCH higher and I always used them to 7600 rpm.

AFAIK, and as far as I've seen when I installed them, the TTE seems to me to be the stock (100% SAME design) with, maybe, different material...
so would be very strange if the stock could reach 7500 rpm and the TTE no...

Moreover I know for sure they are using here these rods even in de-restrictored 3SGTE for ice-races (for example Yaris with 450 bhp).

BTW, it sounds correct that if approaching to 8000 rpm, it would be better to change to other stuff...

Wolf

_________________
Wolf_Tm
TM 250 enduro 2 stroke
GT-four ST205 Snowy White with selfmade 3SGTE v4.1 - [2.34kg/bhp DynoDynamics]
http://www.youtube.com/WolfTm250
http://www.facebook.com/wolf.tm

Yep, the rods look pretty much the same as the OEM ones. Like you say I think the material must be upgraded. The finish is still pretty rough so before using them I'd probably get them shot-peened, polished etc.

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Hi,

more surface can transfer heat better

this is why i'am not a fan of painting the block and head

greetz

_________________
KEEP COOL UNDER PRESSURE

street legal?.....perhaps in tschibuti

???

_________________
Wolf_Tm
TM 250 enduro 2 stroke
GT-four ST205 Snowy White with selfmade 3SGTE v4.1 - [2.34kg/bhp DynoDynamics]
http://www.youtube.com/WolfTm250
http://www.facebook.com/wolf.tm

Hi,

a rough surface like the head-cover can transfer heat better against a polished as it has more surface

here a extreme example:

on top a rough surface, and on buttom a polished



greetz

_________________
KEEP COOL UNDER PRESSURE

street legal?.....perhaps in tschibuti

Sunny... believe me... I perfectly know relationship between surface and temp transfer...

I don't understand relationship with rods and limitter

_________________
Wolf_Tm
TM 250 enduro 2 stroke
GT-four ST205 Snowy White with selfmade 3SGTE v4.1 - [2.34kg/bhp DynoDynamics]
http://www.youtube.com/WolfTm250
http://www.facebook.com/wolf.tm

Hi Wolf,

ok

greetz

_________________
KEEP COOL UNDER PRESSURE

street legal?.....perhaps in tschibuti

Other meat for the BBQ:

Wolf:
Mr. XXX,
talking about the TTE connecting rods (Japanese ones) for ST205, I need to know their maximum safe rpm limit for track use.
Thank you, regards.


Mr. XXX:
Hello Sir
Maximum is 8500 RPM
With kind regards

_________________
Wolf_Tm
TM 250 enduro 2 stroke
GT-four ST205 Snowy White with selfmade 3SGTE v4.1 - [2.34kg/bhp DynoDynamics]
http://www.youtube.com/WolfTm250
http://www.facebook.com/wolf.tm

http://www.youtube.com/watch?v=njbj6xeYCoU

I definitely need to raise up a bit the limitter...

_________________
Wolf_Tm
TM 250 enduro 2 stroke
GT-four ST205 Snowy White with selfmade 3SGTE v4.1 - [2.34kg/bhp DynoDynamics]
http://www.youtube.com/WolfTm250
http://www.facebook.com/wolf.tm

Balancing and also piston selection will play a major role in RPM limit too

e.g AlBe (Aluminium Berillium or "Unobtainium" to the common person) pistons of 2 ring slipper racing spec would probably double the rev limit due to their ridiculously low mass

Yes, it absolutely has sense that an inertial mass reduction will decrease rods' stress.
I have modified wrc pistons in, so rpm limit must be higher than with stock pistons, even if i remember they were not so light as the as the cp i had in the past...

_________________
Wolf_Tm
TM 250 enduro 2 stroke
GT-four ST205 Snowy White with selfmade 3SGTE v4.1 - [2.34kg/bhp DynoDynamics]
http://www.youtube.com/WolfTm250
http://www.facebook.com/wolf.tm

Heavy rods and heavy pistons = same stress on con rods etc at lower rpm than lighter pistons and rods.

I have a formula to work out the stress placed on the con rod for fitting different weight pistons and rods.

This is in an excel spreadsheet, anyone interested then drop me a line with your email address and I'll send it over for all you geeks to look at/use

_________________
Kris
95 ST205 - slept for 10 years, now waking up...
Avensis
http://www.gtfours.co.uk
_______________________________________
Turbocharging - the replacement for displacement

Hi Kris,

interested

gasthof-hackl@gmuendnet.at

greetz
Alex

_________________
KEEP COOL UNDER PRESSURE

street legal?.....perhaps in tschibuti