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Yes, i was hoping for more but put it down to the dyno and a warm day,Quote:
Originally Posted by czy_sol87
but also suspect the tune wasnt very good....Vtec point set at 7k!? Whats the point of having 2 cam profiles if you only use one for 1krpm.
I realy need to make the mission to Melbourne and get somone who realy knows honda's to tune it.
I think you have over cammed your engine, Toda B cams are too big for stock B16a
too many variables, you can only really compare them on the same dyno,
and to be consistent run one after the other.
yeah i think a retune is in order.
7k vtec is abit too high. Most people have earlier vtec point rather than ones that late.
Just rem that the first profile on nearly all aftermarket cams are the same as stock.
Your holding onto a stock profile about 2k past its due efficiency.
Quote:
Originally Posted by redinteg
AFAIK Toda B cams use a rather large idle cam profiles. Also with stock compression its not surprising that the idle cam is making more power than the VTEC cam at such a high rpm since the dynamic compression with the larger spec cam profile would be very low.Quote:
Originally Posted by Limbo
i thought it was only spec C that had a different first profile?
Im pretty sure both spec B and C use same idle profile, perhaps Toda_AU could clarifyQuote:
Originally Posted by Limbo
Just find someone knows how to phase your cam...
Spec B for stock engine? you'll be happy not to lose any power...
sounds like i need some cam gears and CTR slugs, or whould just a thinner head gasket raise the compression enough?
My mechanic seems to think someone has shaved a bit off the head in an attempt to raise compession also, and that whould explain the date engraved on the head, thats has been a mystery to me since i bought the car.
yeah you gyus are right... according to Adrian/Toda_Au TODA Bs have modified low cam profiles too so the vtec shouldn't be set that high even though it apparently makes power upto 9krpm... even then you'd want your engine to be able to rev that high... it's generally safe to do so if you have the springs too...
your mechanic should have done a cylinder compression check prior to switching the cams.. if it was still the stock 10.4:1 CR and stock valvetrain cylinder compression should be around 220psi each... afaik the ITR B18c7s are around 240psi per cylinder for 11:1 CR with the ITR cams.
Can't do this test anymore with upgraded cams because the dynamic CR would have changed as a result of the cam profile overlaps.
Quote:
Originally Posted by redinteg
ok yesterday i went to a dyno comp at mazfix i ended up quite confused now i know many might think my previous pull of 108.9kw untuned is a bit high.
Many may think this proves it but yesterday my car only pulled 124.2hp or 92kw that is a 17kw drop.
The only difference i made was to take the filter off my injen intake and mount a bellmouth in my bumper
I'm basically putting this down to Different dyno, shouldn't have taken the dyno proven filter off, the car now has 220,000kms and the last and worste my mrs thrashes it when cold.
looks like its time for a new engine or a rebuild but in the mean time can anyone confirm my reason for the loss or add anything interesting