MY friend had zex hooked up to his b16a2 and burnt a piston. So instead of spending a lot of money on aftermarket pistons he might go w/ type r pistons. Will B16b and B18c5 both work?? Which would be best??

 

The ctr or itr pistons can be used, but the rods will need to have 1mm milled from each side of the connecting end of the rods.



The ctr pistons will yield higher compression than the itr pistons and in either case if your friend still wants to use nitrous he's better off going with different pistons that will yield a lower comopression.

 

Any OEM piston, being that they are cast, can also melt or burn under the extreme temps when using nitrous. Therefore, the only way to minimize this is to use a forged unit. By using a ITR piston you are not gaining any added strength and by the same token, a CTR piston will achieve a higher compression level, which in turn will possibly create more issues when used with nitrous. I've had good results in the past using 10.5:1 forged pistons in a B16A block, while running up to a 100 shot of nitrous. In conjunction, the fuel management used helped to dial in the nitrous and tune the motor around the configuration.

For a relatively stock ecu config(i.e. VAFC or other entry level fuel controller), you can probably get away with it as well.

-Brandon

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 110 South &raquo;</TD></TR><TR><TD CLASS="quote">Any OEM piston, being that they are cast, can also melt or burn under the extreme temps when using nitrous. Therefore, the only way to minimize this is to use a forged unit. By using a ITR piston you are not gaining any added strength and by the same token, a CTR piston will achieve a higher compression level, which in turn will possibly create more issues when used with nitrous. I've had good results in the past using 10.5:1 forged pistons in a B16A block, while running up to a 100 shot of nitrous. In conjunction, the fuel management used helped to dial in the nitrous and tune the motor around the configuration.

For a relatively stock ecu config(i.e. VAFC or other entry level fuel controller), you can probably get away with it as well.

-Brandon</TD></TR></TABLE>Agreed, the last thing you want with nitrous is hight compression. If I were you, I'd spend the little extra for an aftermarket piece with a lower comp.

 

So he should get aftermarket lower compression pistons?? Which brand?? We arent sure what went wrong w/ tyhe motor. Something went bad in the fuel system. He was running a zex 50 shot and only ran it once, leaned it out and burnt a hole in the piston.

 

Anyone??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by getzy3 &raquo;</TD></TR><TR><TD CLASS="quote">So he should get aftermarket lower compression pistons?? Which brand?? We arent sure what went wrong w/ tyhe motor. Something went bad in the fuel system. He was running a zex 50 shot and only ran it once, leaned it out and burnt a hole in the piston.</TD></TR></TABLE>

Are your sure it was hooked up correctly?

 

well i have no clue of how to hook up it up so i wasnt able to help. He is pretty sure it was hooked up right though. What could have been wrong in hooking it up to make that happen?? If anyone knows it would be great so it doesnt happen again!!

 

If you have the vacuum lines going to the manifold and to the fpr reversed that probably would do it.. On a 55 shot, any stock motor should be able to handle that.. I ran a Zex 55 shot dry on a crx hf motor which is the weakest motor out there and I did it for a long time..

 

I hear ya on that one. I've seen 80 shot dry on a stock B16 at it didn't burn the piston up. Keep in mind that although you are using a 50 shot jet, by the time it enters the intake plenum and it distributed into each runner, then mixed with fuel and into the combustion chamber; it is a little less. Therefore, a 50 shot will not get you 50hp, but maybe 10-15 at the wheels.

-Brandon