iirc toda_au mentioned about b18's piston speed is higher then b16, so, doesnt suit spec C that well compare to b16, in addition to not having enough compression etc..
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iirc toda_au mentioned about b18's piston speed is higher then b16, so, doesnt suit spec C that well compare to b16, in addition to not having enough compression etc..
piston speed is given coz of the bore/stroke ratio.. but maybe he should clarify also.. did he he mean B18c2 in his references to "B18" or B18c7.. coz a B16 only has 10.2:1 staticQuote:
Originally Posted by gambate
b16a has a much revier nature thats y it would be more suited to spec c's were as having a 1.8l with spec c'ss youd probably make power past its stock bottom end limits...
a stock bottom end b16a can rev past 9000rpms no problems at all assuming valve train has been upgraded...
my car (b16a2) gained power everywhere from stock cams to spec c's... the mid range power is awesome... the high crossover point can be seen as a negative.. bcoz yu dnt get the vtec sound until 6800-7000rpms but yur making alot of poweer without vtec yet... vtec kicks inn at 6800-7000rpm and then its alot of funn the sound is unexplainable... rev limit at 9000rpm... i make 98kwatw at 7000rpm before vtec kicks in...... a b18c wnt like reving to 9000rpms alot.... although a bigger displacement motor will make the power band and torque band lower anyway so it wnt need to rev to 9000rpms...
as for other stuff you will need to speak to adrian from toda.... any other questions i can answer coz i have the cams in my car so i dnt talk shit its all by experience..
maybe jdmtypeR can share his experience with Toda c's on a b18c7
all i can say is not a good idea didnt gain any power losr power from low and mid over the stock itr cams and vtec was to late and was getting beaten by a stock motor
go the toda C's....the only way for stock b16a motors! I would use them if i had a set.
thanks all, just wanted to clarify.. it all makes sense.
but just one more thing... does it hold true for ITR motors also?? because everyone referring to "B18" or "B18c" seems generic.... i just always thought that the b18c7 from the ITR was also happy to be around 9000rpms safely despite bore/stroke ratio...
***EDIT***
delsol9000rpms: btw i saw your video.. definitely looks like a fast car... you must have really crap tyres though?
ye the tyres on the street were half decent but on the track oncee they got some heat into them they were hopeless... plus single spinner diff... its almost impossible to launch the car fast... launch control doesnt work with shit tyres plus a single spinner..
heres the videoo... you cann hear when i start to accelarte very late coz of wheel spin...
http://au.youtube.com/watch?v=TTmrulYP834
cant be agreed more, has toda B (same low cam as spec C, afaik, 11mm lift) on my stock b18c7 bottom end with oem head gasket (did not took out head for the cam job). anywhere below 5krpm is TOTALLY gutless, even less then my stock d-series i reckon.Quote:
Originally Posted by jdmTYPE R
i dont understand how most ppl that has this setup can say "good low end and superb mid-high with the toda B in b18c7" with oem spec compression. shit me to tears..
What should shit you is you either didn't have them installed & tuned correctly or your tuner was unable to pinpoint the problem with your combination.Quote:
Originally Posted by gambate
I guess from a customer's perspective it's easy to blame the latest part of your combination for being the root of all evil...
But unless it's not backed up with a why, quite frankly it's just not logical.
FWIW, most cams perform poorly when they're not installed per manufacturer's spec as the tuning will be off - regardless.
For best results (read as get what you paid for)Cams need to be set to the correct LCA or they won't work as they should.
Other issues are usually found in the actual combination used. (I/H/E etc)
There is a lot more to why than "I changed the cams & it went worse"
In the case of B18C7 ITR engine, if the combination is right & capable of supporting better cams, the B's work a treat.
If the combination is shiite they won't work well at all... & if the B's don't work... Don't fool yourself into thinking something else will.
Like it of not, there are a lot of aftermarket parts from name brand manufacturers that don't work well with real motorsport engine parts.
These are I/H/E components that claim to be the goods yet struggle to improve the output on a std engine...
Good Combination + Good instalation + Good tuning = Good output
Swap a Bad in for any good & you get Bad output.
It's pretty simple.
Though reading this will likley shit you even more,
You should know, Just because something didn't work for you, does not mean it cannot work.
There is always a "Why" & it could well be glaring you in the face.
i think adrian summed it up nicely... anything else need to be said...?
All i hear is excuses mate....Quote:
Originally Posted by delsol9000rpms
From listening to the vid, you have a gutless mid range and power from 7k onwards... Look at your MPH, its only 93mph (Ek4 full interior, full tank of fuel)... you can get that with a stock b16a motor with a few bolt-ons...and plus you gota rev the **** of your car to make it wheel-spin...
Your gota pop a valve one day doing that... rev limiter :zip:
Enoguh said :zip: