How very wrong u are. Gears have teeth if u must and pulleys have nothing...Quote:
Originally Posted by tinkerbell
U cant have a cam pully because it has nothing to grip to and turn.
Cam gears have teeth for the belt OR chain to sit on :)
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How very wrong u are. Gears have teeth if u must and pulleys have nothing...Quote:
Originally Posted by tinkerbell
U cant have a cam pully because it has nothing to grip to and turn.
Cam gears have teeth for the belt OR chain to sit on :)
sorry to be off topic again...Quote:
Originally Posted by silver_screen
but even though you are RIGHT - you are still WRONG
http://home.exetel.com.au/tinkerbell/pulleypictures.jpg
we knew what he meant....move on!
Adrian, I dont think cam gears are gonna fix those 2 dips in the curve.
There is something else goin on there, it has to be igntion timing.
What did you do to timing in that area to test if that was the issue?
Ever consider "retarding" timing... you'd be suprised.
who did the valve job on yonas' head?
Incorrect usage of words :)
I know what you're saying,Quote:
Originally Posted by ProECU
FWIW, we tried both iginition retard & advance...
Also tried humps & dips in the timing at the problem area's with no great result though this did result in smoother power delivery than when the timing curve had a linear advance to peak.
The final curve ended up with a few small humps / dips.
Not pretty, but there wasn't much else that could be done.
Regarding mixtures,
Tried as lean as 13.5:1 & as rich as 11.5:1
FWIW, it liked it best at 12.3~12.4:1 WOT
IMO, there's other issues with that engine,
It's likley the cams are retarded & causing the lack of mid range & high peak.
This could be from material removed during head service & possible use of thinner head gasket.
No adjustable pulleys were available so it's only guess work.
Further to that, there may be an issue with the head on this motor.
In the past, we've had engines built elsewhere, come in to be tuned that have had a similar output charateristic.
When nothing worked to solve it including cam pulleys & the problem turned out to be the valve job in the head itself.
In any case, there's no fixing this one for now as I'm pretty sure that engine is no longer in the car... (Not sure, you'd have to ask Yonas)
Cheers
Adrian
:thumbsup:Quote:
Originally Posted by TODA AU
you don't save money with a cheap head job...
http://img.photobucket.com/albums/v6...u/IMGP0135.jpg
This is what I got with the same b16a motor/gearbox and head , ctr cams + valve springs , Type R IM + TB .The only difference : J's racing intake , JDM 4-1 header , spoon plug and play ecu. No adj cam gear are used.
This is before BC header , 70MM cai , and hondata s100.
Sounds like you are speaking for experience :zip:Quote:
Originally Posted by tinkerbell
ALLMTR996
dam i never thought of how the head gasket may affect timing. would it really make that much difference? i mean u lose timing but gain compression. am very curious how this may affect things when i do my minime.Quote:
This could be from material removed during head service & possible use of thinner head gasket.
btw: this thread is total pwnage!
...
To be honest, Yonas's car would be hard pressed to pull the skin off a potato, let alone impress on the 1/4 mile.
Don't worry, i'm sure the new owner will give it a good bashing ;)
it WAS a stock B16A, then it became a stock B16A with:
CTR cams
valve springs
ITR Intake manifold
ITR throttle body
BC 4-2-1 headers
Hondata s100 (tuned)
but even though you are RIGHT - you are still WRONG
you don't save money with a cheap head job...
luv it :thumbsup:
it is about 0.5 degrees retarded for every 20 thou of an inch removed...
but i never verified this figure independently, it was just what i was told by a person...
yes:Quote:
Originally Posted by ALLMTR996
http://home.exetel.com.au/tinkerbell...CdynoOct06.jpg
shocking valve seat job according to my tuner(s)...
i am looking forwards to seeing what a "proper" multi-angle valve job does to that aweful torque drop over 5600rpm...