how will a b20 block with oversized CTR pistons "coated" with a shot what shot will be good the highest as a posibble and it will be a 4 fogger if it matters..... so im basically asking what octane should i run and what shot.....and if the b20 ctr pistons with a 4 fogger big shot will pop off??

because i have knowledge of ctr pistons on a b series 81.5 mm block melting.....but with c16 will run some what of right......
(DID RESEARCH SO DONT FLAME ME)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callinthe187 &raquo;</TD></TR><TR><TD CLASS="quote">(DID RESEARCH SO DONT FLAME ME)</TD></TR></TABLE>

Was it related to the topic of this post? Or something else...?

 

excuse me? i dont get you.

 

The pistons you have listed are cast, making them the weak point in a N20 application. I also think that your compression ratio will be pretty bad (as in 0.00:1). The CTR pistons are 81mm, no? maybe 81.5mm if they are oversized. Now, if I remember correctly the B20 block is an 84mm bore (combined with an 89mm stroke to achieve its 2.0L displacement)... that can't be good.

Without any other information (fuel setup, ECU tuning, other mods, etc...) I can't really answer your question... if there is one.

 

well i have been told that CTR pistons can be sprayed but only tuned with c16 as in you cant run 93 octane and spray on 81.5 CTR because there cast and they will melt......because i have seen someone post on here that they ran on 13.5:1 CR with nitrous with out a problem.....but i forgot who posted and i cant find it to talk to that person......but i wanted to ask what fuel set up do i need for this to be possible also what else do i need to support the nitrous 12.16:1 set up..

 

Just to clarify, what block are you building? You mentioned a B20 which has an 84mm bore, and proceed to talk about oversized CTR pistons that have an 81.5mm bore. 84 is not equal to 81.5 and vice a versa.

As for the pistons, they will yield differnt comp. ratios depending on the block, and head that they are used in. Use this following web-tool to determine your compression ratio, and let us know what it is.

http://www.c-speedracing.com/h...c.php

After we know a little more about your setup, we can help you out with other issues related to it.

 

no yes i know that originally CTR pistons are 81 mm.....but they have 84mm CTR pistons....if you know wich ones im talking bout i think the RS machine shop supports them i think they are called arias.....well instead of me using the term CTR pistons ill call it 84mm 12.16:1 CR pistons...

 

b20 sleeves are supposedly weaker. regardless of whether they are or not, i wouldnt run 13:1 with nitrous on stock sleeves. you are going the right route tho with direct port, but i would look more at 11.5 mayyyyyyyyyyyybe 12:1 with like a 60-100 shot of squeeze.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callinthe187 &raquo;</TD></TR><TR><TD CLASS="quote">no yes i know that originally CTR pistons are 81 mm.....but they have 84mm CTR pistons....if you know wich ones im talking bout i think the RS machine shop supports them i think they are called arias.....well instead of me using the term CTR pistons ill call it 84mm 12.16:1 CR pistons...</TD></TR></TABLE>

Okay, sorry for the confusion. As stated by zeimbo, the compression ratio seems pretty high for nitrous. I am not sure about sleeve strength on a B20 vs. a B16 or B18, but that is a hefty compression ratio to squeez on top of. Also, the fact that the pistons are cast worries me.

 

yea i heard about weak sleaves im guessing because the thinner sleaves....but im willing to take the risk...

 

yea like i stated above about the weak sleeves but im willing to take the risk....and the pistons ima end up getting are not cast actually there forged or coated....but definatly not getting cast becaus ethey will melt with out a doubt..

 

I sprayed a 200 shot on a B20 with stock sleeves...... It finaully cracked a sleeve when I had a coolant leak and over heated it but it was after 200 passes. It made 202whp on the motor and 315whp on a 100shot...

 

was it a completely stock motor??? and did you have a vtak head....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callinthe187 &raquo;</TD></TR><TR><TD CLASS="quote">was it a completely stock motor??? and did you have a vtak head....</TD></TR></TABLE>vtec

 

oo if you dont mind me asking what mods did you u dont mind me asking...cuz im looking to make high numbers also...thanks in advanced....

 

202whp = no stock motor.
prolly intake, hytech headers, 2.5" exhaust, high comp pistons, maybe an aftermarket intake manifold, and good tuning

 

nitrous loves high compression. for best results run some race gas and a 100-150 shot.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callinthe187 &raquo;</TD></TR><TR><TD CLASS="quote">oo if you dont mind me asking what mods did you u dont mind me asking...cuz im looking to make high numbers also...thanks in advanced....</TD></TR></TABLE>12.5.1 pistons
Crower rods
Type-r head, intake
Crane cams
Mugen header, exhaust
Tuned by myself on TEC3

 

You still messing around with NA/n2o cars Rick?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sc4dr &raquo;</TD></TR><TR><TD CLASS="quote">You still messing around with NA/n2o cars Rick?</TD></TR></TABLE>Not on my car.....But I have a few others that I mess with. If street racing was hopping I would build another one in a heart beat. Spray is the way to go on the street.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecallmotor &raquo;</TD></TR><TR><TD CLASS="quote">Not on my car.....But I have a few others that I mess with. If street racing was hopping I would build another one in a heart beat. Spray is the way to go on the street.</TD></TR></TABLE>

If you're street racing for money I'd hope you're bringing a whole lot more than a sprayed FWD Honda to the party

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted92 &raquo;</TD></TR><TR><TD CLASS="quote">

If you're street racing for money I'd hope you're bringing a whole lot more than a sprayed FWD Honda to the party </TD></TR></TABLE>I've won my share on the street with my sprayed FWD.......... Its not always about the fastest car......

 

spray on the street would be awesome IMO.

 

about how much did you waaste cuz i wouldnt mine having 200 plus whp

 

why is it a way to go on the "street"?