trucdoken

watsup, i used to be an all-motor guy, now decided to try out turbo setup.
my all-motor gsr block messed up due to valves and pistons. the one of the rod damage the cyclinder wall, and im wondering if i bore and hone to 81.5mm using cp 9.1 compression pistons and eagle rods. whats the maximum psi i can push safely for street and for track usage. will tune with uberdata. thanks.

ProjectDarkBlack

sounds like a 600 hp block at least. Remeber output is what stresses it not boost pressure

trucdoken

so, the block can hit 400+ without a problem right.

b16sedan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by trucdoken &raquo;</TD></TR><TR><TD CLASS="quote">so, the block can hit 400+ without a problem right.</TD></TR></TABLE>

With a good tune, absolutely. Welcome to the world of real power, you'll wonder why you didn't go turbo sooner

trucdoken

hey i have a mild build gsr block with bc4 cams, after drove my friend turbo b16, then drive my car again damn i fell so slow. heheh. decide to go turbo now, because i live in albuquerque, elevation 5500ft. bad for NA, good for turbo. love the feeling when turbo spool up...

s2kdre

raise the compression a little

trucdoken

how high schould the compression raise too and whats the benifit for doing that. please explain..

OMG B16

9:1 compression will be fine.

EK_GSR

i have a 98 B18C bored out to 81.5 with CP 9:1 dished pistons and eagle rods..... and i have absolutely no regrets... boost for life !!!

m R g S r

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmhonda &raquo;</TD></TR><TR><TD CLASS="quote">raise the compression a little</TD></TR></TABLE>

no...don't

leave it 9 to 1

deftones0817

i think 9:1 is a good number. Not to high not to low. It's safe and its still streetable.

Josh

BoostedEG6

I have a set-up somewhat like what you are going to have. I am running 81.5mm with CP 9.8:1 pistons with eagle rods and I am running 14psi with no problems and going to bump up to 20psi later on when I tune

Chip

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmhonda &raquo;</TD></TR><TR><TD CLASS="quote">raise the compression a little</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by trucdoken &raquo;</TD></TR><TR><TD CLASS="quote">how high schould the compression raise too and whats the benifit for doing that. please explain..</TD></TR></TABLE>

The thought of higher compression is that it gives you better low end power, a bit more power per pound of boost, and overall better response. Unfortunately I listened to people like jdmhonda who probably have no real experience comparing the two setups, and I went with 10.5:1 compression for my turbo motor. If I had to do it over again I would have gone 9:1, for me having only 92 octane available I like the safety cusion of 9:1 better.

hondaguyef

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chip &raquo;</TD></TR><TR><TD CLASS="quote">

The thought of higher compression is that it gives you better low end power, a bit more power per pound of boost, and overall better response. Unfortunately I listened to people like jdmhonda who probably have no real experience comparing the two setups, and I went with 10.5:1 compression for my turbo motor. If I had to do it over again I would have gone 9:1, for me having only 92 octane available I like the safety cusion of 9:1 better.</TD></TR></TABLE>

I somewhat agree w/ you. ^^^^^^^^^

I have had both an 11.5:1 motor and a 9:1 motor on boost. The 9:1 was much easier to tune and race gas never had to come into play. The 11.5:1 made good power but, it was very difficult to tune on 93 after a certain power level and had to be switched to a race gas/pump mix. I'm sure the power difference was minimal but, noticeable(on the high C/R motor) and I will not go higher than 10:1 on a turbo motor again due to tuning difficulties.

Phil

JDM_Risa

iTrader: (1)

i think with mild compression such as 9.8:1 to 10:1 compression for a boost setup you should sleeve your block to protect you from any denonation cause thats what usually occurs but with 93 octane thats no problem...were less fortunate in california stuck with 91 octane....i use to have a sleeved 2.0 liter block with 10:1 compression now i am goin with a 9.8:1 block in my new Type R stock sleeves....i shud be good for 400hp on stock block