i need some advice on this topics but im not to sure. i have a golden eagle sleeved b18c1 block with je 11.5.1 comp pistons and eagle rods. Can i safely run 12 psi or more psi of boost with c16

 

no.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SmrCRX &raquo;</TD></TR><TR><TD CLASS="quote">no. </TD></TR></TABLE>

yes you can, you can even run 100 octane its all in the tune. Im at 11.3 compression and on 6 psi on hondata s300 and got me 296whp and 194 tq. Its fun as hell on the streets too, got me a 12second run full interior also. When the tax returns come i will take the itr pistons out and go with some 9:1 and sleeve the block. If you have the money i would go that route Also what rods and bore size is it?

 

you can do it, but make sure you have enough octane to keep out knock.

 

the block is already sleeved and it has 84mm bore and eagle rods. so i shouldnt push it over 10psi or should i just take the pistons out and put 9.5.1 . i really wanted to try the high compression boost thing. i figured it would rev quickly and eliminate lag

 

my bad.. sorry for an inaccurate post

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by osaka777 &raquo;</TD></TR><TR><TD CLASS="quote">i need some advice on this topics but im not to sure. i have a golden eagle sleeved b18c1 block with je 11.5.1 comp pistons and eagle rods. Can i safely run 12 psi or more psi of boost with c16 </TD></TR></TABLE>

Same old stuff...

What turbo?

What engine management?


On C16, you can pretty much do anything... As long as you feed the motor with C16 every time, 12 PSI on any turbo would do fine.

 

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

Same old stuff...

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lol

 

nos51s stock k series is 11:1 compresion and its been running over 20 psi for some time now....run c16 and tune it right and youll be fine

 

I wouldn't do it...it would not be a fun car to drive IMHO I did it on 11:1 and the car was so unstable. Granted I was untuned, but it was still a pain in the *** trying to get it right. And no tuner in town wanted to touch it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1Quikgsr &raquo;</TD></TR><TR><TD CLASS="quote">

yes you can, you can even run 100 octane its all in the tune. Im at 11.3 compression and on 6 psi on hondata s300 and got me 296whp and 194 tq. Its fun as hell on the streets too, got me a 12second run full interior also. When the tax returns come i will take the itr pistons out and go with some 9:1 and sleeve the block. If you have the money i would go that route Also what rods and bore size is it? </TD></TR></TABLE>

what kind of head gasket did you use???...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MiraiZ &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't do it...it would not be a fun car to drive IMHO I did it on 11:1 and the car was so unstable. Granted I was untuned, but it was still a pain in the *** trying to get it right. And no tuner in town wanted to touch it.</TD></TR></TABLE>

Too bad you don't live near me...LOL

Anyway, pump gas I wouldn't suggest it without a competent tuner and good EMS in your area. On C16, the detonation limit is a lot higher; and at that compression, you can probably get away with 450+ WHP at that compression ratio even if tuning was iffy.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18b1turbo &raquo;</TD></TR><TR><TD CLASS="quote">

what kind of head gasket did you use???...</TD></TR></TABLE>

oem never had a problem with it either

 

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

Too bad you don't live near me...LOL

Anyway, pump gas I wouldn't suggest it without a competent tuner and good EMS in your area. On C16, the detonation limit is a lot higher; and at that compression, you can probably get away with 450+ WHP at that compression ratio even if tuning was iffy.</TD></TR></TABLE>

I heard you do amazing work...too bad nobody here has your skillz

 

I cant read all the posts, but high compression pistons in FI isnt what the FI theory had in mind. But, to each his own.

Put it this way, if i ran a high compression FI set-up, id be sure I know how to remove a head, oil pan, crank, then rods and pistons. (you can actually replace rings/pistons with the block in the car.) Trust me, I know what happens to compression rings at 10.6 c/r. go broke.


digressing, its like a drive train. Theres a weak point that will go first. clutch, spider gears, axles tranny blah. Similar goes for the above.

There is a lot out there I still have to learn.

 

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

Put it this way, if i ran a high compression FI set-up, id be sure I know how to remove a head, oil pan, crank, then rods and pistons. (you can actually replace rings/pistons with the block in the car.) Trust me, I know what happens to compression rings at 10.6 c/r. go broke.

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You can't replace pistons with the block in the car. Plus you need to take it to a machine shop to get it honed.

 

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

You can't replace pistons with the block in the car. Plus you need to take it to a machine shop to get it honed.</TD></TR></TABLE>

sure you can with the head and oil pan off ask me how i know..

 

word brother, to your mother!

 

run some E85 in that thing and you'll be set

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1Quikgsr &raquo;</TD></TR><TR><TD CLASS="quote">

sure you can with the head and oil pan off ask me how i know.. </TD></TR></TABLE>

Yeah but how are you going to hone it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Finger Lickin’ good &raquo;</TD></TR><TR><TD CLASS="quote">I cant read all the posts, but high compression pistons in FI isnt what the FI theory had in mind. But, to each his own.

Trust me, I know what happens to compression rings at 10.6 c/r. go broke.

There is a lot out there I still have to learn. </TD></TR></TABLE>

Which FI theory? All this compression vs boost boils down to controlling detonation. If the fuel octane can support the compression ratio along with proper tuning, then it is no different then low compression on low octane fuel

I don't see my compression "rings" go broke at both 11.5:1 CR and 10.5:1 CR. I think the ringlands would probably go first, but that's not what we are discussing here. No detonation/improper combustion (det., pre-ign, etc.) means no damage. Doesn't matter what the compression ratio is.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Finger Lickin’ good &raquo;</TD></TR><TR><TD CLASS="quote">
There is a lot out there I still have to learn. </TD></TR></TABLE>

^ That's the best statement you've made so far

 

the block b18c1 i have is sleeved and i have herd that alot of american muscle cars have been doing it for a while with super chargers running high comp with boost. i dont want to boost alot just about 10 - 12 psi, im using 2000 b16 head. stock head gasket shoulb be fine right?? and im thinking of running crome pro

 

Have to a agree with Tony. Proper combustion will take into account compression ratio, timing, burn rate of fuel, detonation resistance, etc. The reason most people follow the "lower compression is better" theory is because it is safe. I run 11.5:1 and 13psi (15 if I would get off my *** and install the solenoid). I wouldn't build a customers engine because I can't control their right foot.

There is no reason why you can't run pump gas and run that kind of compression, but you better be ready to break some parts learning how to tune it. Don't even try it if you don't have proper fuel and ignition control.

 

i dont claim to know everything. effing considering everything, lower compression levels is better. straight up.

but its cool, everyones doing their own thing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Finger Lickin’ good &raquo;</TD></TR><TR><TD CLASS="quote">lower compression levels is better. straight up.</TD></TR></TABLE>

If overall nut busting power is your goal, then a lower CR is your friend

However in terms of response and off-boost driving, a mild CR (in the 10.0-11.0:1 range) will be "better".

I know apples and oranges, but the Honda RA167E in 1987 ran 3.5bar boost (~51psi) through 10.4:1 compression, and was reliable as hell.

For the average tuner, lower compression is more friendly. You have a greater room for error, and your fuel and ignition mapping don't have to be spot-on.