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#15
Re: Modded A15 problem
ronald_loulan
Posted on: 2009/9/4 4:20
Retuned my engine d...
The ignition timing were too much when i plug in the vacuum... Static 12 deg but wif vacuum it goes bout 25 deg... Adjust it to 10 deg(static) n wif vacuum 15 deg... After the adjustment i found tat the nosedive prob occur under 2000rpm...(previous was 2500rpm) Confused....  
#14
Re: Modded A15 problem
ronald_loulan
Posted on: 2009/9/2 8:48
Thank guys....
U guys really helped me....
#13
Re: Modded A15 problem
ddgonzal
Posted on: 2009/9/1 19:16
Quote:
single spring good enough or i must use the double 1??? A15 valve springs are only good for a little over 6000 RPM. For higher RPM, Nissan Competition sold dual springs. The lighter A12 valves could go about 6400 with single springs. But the A15 has larger valves. And if yours are worn from age and use, they might not even rev to spec. Quote:
Dual valve springs are the best.
#12
Re: Modded A15 problem
ronald_loulan
Posted on: 2009/9/1 15:04
I recall tat it was from ae86....
But after i install it to the std b310 suspension,the front looks high... So i adjust it down to the max but still looks high... Change the spring to stiffer n lower 1... Then the absorber was like no play after installing 1 inch bump stop....
#11
Re: Modded A15 problem
ROConnor
Posted on: 2009/9/1 14:18
I think they may be silvia strut tops, hav seen them used beffor.
#10
Re: Modded A15 problem
LittleFireyOne
Posted on: 2009/9/1 14:06
Quote:
The strut tops were so rare in Malaysia... Tats the 1st 1 i saw when i bought it... Too right, inverted monotube shock absorbers!! that's the sort of good gear you would find on a rally car or circuit car.
#9
Re: Modded A15 problem
superbin
Posted on: 2009/8/31 20:37
Rather go double on any performance 8valve a 16valve head is another story there the valves are about half the weight and you can get away with one spring. On the 8 valve the valves just become to heavy. Anyway that the way I figure it to be.
#8
Re: Modded A15 problem
ronald_loulan
Posted on: 2009/8/31 11:47
Is single spring good enough or i must use the double 1???
Any other engine's single valve spring(heavier) tat i can use??
#7
Re: Modded A15 problem
ROConnor
Posted on: 2009/8/31 8:16
you'l need heavyer spings to make the best of your cam otherwhise its a bit of a waist. for much over the 6000 rpm mark you will need doubles.. allthough I hav heard of some racers who arent allowed to use doubles useing Haley davidson springs and allso buick V6 springs.
#6
Re: Modded A15 problem
ronald_loulan
Posted on: 2009/8/31 7:57
Im thinking of stock spring from other engine like mayb L16 or etc??
I scare those hard spring will wear off my regrind cam...(not sure bout tat) Low budget spring i mean... Thanks...
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