I am getting ready to start building an SOHC ZC (basically just a D16A6) for a 75 shot of nitrous.

I already got a new clutch and flywheel, and an Si tranny ready to go in, so now the motor needs attention.

My plans were: retard timing 2 deg., one step colder plugs, and run race gas when spraying. (Track only spraying, btw.)

I guess the question is, is there any real "weak link" I should worry about before spraying? Pistons? Rods? Rings? Fuel Pump? (I'm running a wet kit, will the FP be an issue?) Say something were to go wrong, what's the first thing that would fail? If I know that now, I can replace it before anything happens, as a security measure .

 

A good thing to get would be a walbro, either a 190 or a 255, its really up to you. Its obviously going to be pushing the limits of your stock block, but you should be fine. Keep that bottle hot or you won't be happy with nitrous.

Have fun with it, i know i did with mine

 

weakest link is the piston rings no question. that is the whole reason i am rebuilding and going ahead and getting a turbo setup.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Speed Infliction &raquo;</TD></TR><TR><TD CLASS="quote">weakest link is the piston rings no question. that is the whole reason i am rebuilding and going ahead and getting a turbo setup. </TD></TR></TABLE>

So do they make "upgraded" rings?

 

it's actualy not the rings that are weak its the ring lands (forged pistons will solve that), and the stock block should have no problem with a 75 shot. (properly tuned of course)


Modified by gt25CIVICex at 11:31 AM 8/16/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gt25CIVICex &raquo;</TD></TR><TR><TD CLASS="quote">it's actualy not the rings that are weak its the ring lands (forged pistons will solve that), and the stock block should have no problem with a 75 shot. (properly tuned of course)


Modified by gt25CIVICex at 11:31 AM 8/16/2006</TD></TR></TABLE>

one day when the bottle is not warm enough and you spray...there goes the rings. it happend to me sad to say.

 

Go with rods and pistons up your spray too 100-125 shot and enjoy

 

i would say the rods and the rings/ringlands woudl have to be the weak links
good luck on your car

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Speed Infliction &raquo;</TD></TR><TR><TD CLASS="quote">one day when the bottle is not warm enough and you spray...there goes the rings. it happend to me sad to say.</TD></TR></TABLE>

Why would bottle temp cause it to run lean?

 

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

Why would bottle temp cause it to run lean?</TD></TR></TABLE>

if the bottle isnt warm enough it sprays less than your jetted for so i dont know what he is talking about..

 

That's what I'm thinking. It would just make me run richer, which is actually safer.

 

Would a larger fuel pump adversely effect normal, everyday driving?