torqueless

ok heres whats going on, i have a d15b7 motor with a t25 turbo, it spools very quick but power falls on its face at 5800-6000rpms. so i have a vtec y8 head that will be put on very shortly, and i was wondering since the power band will be different, will the turbo still fall on its face at 6K? i also have a small 16g, i was saving to put on when i put the y8 head on, but i got anxious and put it on today, to see if it would gain more power on the b7, and it is definitley alot slower!

very laggy and doesnt pick up power till 6k(right when i have to shift.) but i will for sure use the 16g when the vtec head is on, but i was just wondering if the t25 would still only be good for 6k or if it would make more power for longer rpms do to vtec?

mike93eh

get a z6 head, too many headaches with the y8 on anything other than a y7 or y8.

torqueless

i already have the y8 head, and ive done 2swaps using that head, with nothing but great great outcomes and great power.
so anyone else want to try answering the question?

dohcVTECeg2

go for the ODB-1 D16Z6 head

mike93eh

the y8 head requires MUCH less timing. what ecu are you using?

torqueless

with the other y8 heads that ive swapped on b7 i set timing at 10. p28ecu

blingking1904

hey do you kno whow to tell the negative and positive side on a stock OEM coil ?

P h i l

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by torqueless &raquo;</TD></TR><TR><TD CLASS="quote">i already have the y8 head, and ive done 2swaps using that head, with nothing but great great outcomes and great power.
so anyone else want to try answering the question?</TD></TR></TABLE>

im pretty sure ur compression will be alot higher with the y8

P h i l

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blingking1904 &raquo;</TD></TR><TR><TD CLASS="quote">hey do you kno whow to tell the negative and positive side on a stock OEM coil ?</TD></TR></TABLE>

use a digital multi meter

torqueless

th ecompression is 10.2:1 wich is the same as if you were to use a zc head.

blingking1904

hey would you be able to show me or tell me how to hook up a tach ?

ek_chris

it'll kick out at around 6000rpm. T25's are good for 2-6K rpm.. after that they lack top end. I have a d16y8 motor.. past 6000 is weak.

13g-crx

same here. i had the 13g, which is very similar, on a y8. right after v-tec came in it fell on its face.

phresh_5

196tq at 4400 rpm, is enough to get me goin'. Just shift sooner to stay in your power band longer. Might want to lower VTEC to about 45k.

P h i l

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by torqueless &raquo;</TD></TR><TR><TD CLASS="quote">th ecompression is 10.2:1 wich is the same as if you were to use a zc head.</TD></TR></TABLE>

if you used the z6 head i thought the comp would be arround 9.8:1