lately, on ht and the aem ems forum i have seen alot of b16s and b18s, making well over 400whp, and up to 600whp on stock sleeves. just with pistons and rods. turbo of coarse. of you guys with internals and stock sleeves how big of a shot are you spraying? i have a b18c5 with rods and pistons but stock sleeves, 75 dry shot now. i want to go bigger and its starting to look safe.

 

i run a 150 direct port on mine ls/vtec stock sleeves

 

whta compression ratio is the motor?

 

If it's done correctly you can achhieve quite a bit with stock sleeves. I have a ls/vtec that I'm building with pistons/rods ARP top and bottom endyn main girdle (b18b) and a GE Block guard w/150shot. I've built two of these already and both are still running one killed a bbearing becasue of the owner insisting on running it to 9800 (not smart)
-Now here's the tip when you get into big shot juice which if you ratio it out compared to a big block 540 or something then you'll find that 150shot is pretty big to a 1.6 liter engine thhe main problem is the cylinder temp increase which increases the chhance for detoantion... IF you detonate at over 6K and 150 it's toast no questions asked.. Chipped valves busted pistons, sleeves you name it. Now if you take proper rpecaustions while building such as glass beading the piston tops putting a nice finish on the quench pads for the head and some other things you're doing good. What I normally do is take a 2.5-3 gallon tank and put it in the truck with an in line pump of your choice and a regulator. Make sure it is return style so there won't be a huge drop in pressure when you hit it. Fill the tank with alcohol and not only will you be gaining hp and tq from the cooled charge but, you are also depeleting the chance for detoantion. Oh yeah hook the sperate system to the fuel side of the nitrouus kit and REMEMBER that alcohol takes twice as much as gasoline to to achieve the same ratio I've found that if you use a fuel jet twice that of a traditonal gasoline app it's fairly safe and will keep you running for a long time. Some people like to use toulene it works good but, doen't have the cooling affect of alcohol. You don't have to use a doubled jet either on the fuel side. Take this advice with a grain of salt and flamers beware becasue I don't care what your uneducated selves think nor what your mom said.

 

All good info but I'd suggest against putting too much stock into the cooling effect. The "cooling" effect of alcohol being vaporized is irrelevant next to the sub zero exit temps of the nitrous. If you really want to go deep into the BS around the gains of the "cooling effect" consider the fact that the cooling effect is caused by the nitrous phase changing from a liquid state to a gaseous state. Yes, you gain a small ammount of dynamic volumetric efficiency from the cooling effect increasing the overall density of the intake charge but it is massively overshadowed by the fact this cooling effect is being caused by a liquid converting into a gaseous state and is, thus, increasing in volume by over 300,000%


Alcohol and nitrous do work well together but its just a big pain in the *** for little gain IMO. Most alcohol guys you see running nitrous actually run gasoline for the fuel enrichment on the nitrous side (comp cars, pro mods, etc). The problem with running double the fuel (usually around a 2.2 Nitrous-to-fuel ratio versus 5-6 with gasoline) is that you need double the fuel cell, double the pump volume, and double the fuel solenoid size. Running a 150HP tune requires you to have a fuel solenoid capable of flowing 300HP worth of gasoline so if you have a system built with the smaller "powershot" sized solenoids you are going to be running dangerously close to the maximum flow of the fuel solenoid.

The whole idea of running a seperate fuel system is awsome though, it works great on street cars. Keep the fuel cell full of your favorite flavor of race fuel and the tank full of cheap (comparitively hehe) pump gas and you are ready to go anytime.

 

I personally never sprayed nitrous in any of my motors. But my friend ran a 100shot on a bone stock ls for a year then blew it up after that. This was beating on it every weekend he said. he is nitrous crazy

 

travis aka bigdaddy dynoed 352whp on a dyno jet with stock sleeves on a b20 with n2o. after a year of racing it got damaged and still dynoed 370whp on church's dynapak.

tuning, maintainance, and race gas are the key.

 

The tune is 80% of the battle IMO!

 

Now that's the type of replies I like.

And yes there is a lot to be said for tuning without it your nothing but a bunch of scrap metal laying on the ground.

I like that pic on your website. That a JRSC with direct port?! Nice.

Really I was leaning more towards the alcohol becasue my comp. is 12.42:1 the cooling affect is beneficial for me at that high of compression and trying to make it survive daily (somewhat) use.


Modified by SOHFAST94 at 1:35 PM 6/29/2005

 

If you are referring to the pic on the mainpage it is a 16v VW intake that was chopped down to fit in a golf. That fuel rail was a close fit hehe.

Alcohol can be a fun fuel to play with, it is very forgiving. I started my racing career working on an alcohol funny car for 3 years during high school so I got to learn a bit about the fuel anyway.

 

Still the same it's nice.

Your website doen't seem to work. Is it down currently?

 

I just got it online a little while back and simply have not had time to get the showcase and tech section going. The mainpage, pricelist, and forum should all work fine though. Too many irons in the fire to get it all done hehe

 

on a b16 my mechanic in pr got 175 in it but progresively

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Phase Change Racing &raquo;</TD></TR><TR><TD CLASS="quote">If you are referring to the pic on the mainpage it is a 16v VW intake that was chopped down to fit in a golf. That fuel rail was a close fit hehe.
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Its running ^^^^^^

On the alcohol and nitrous deal, I work on few of them and will never do it again.
Their very touchy when it comes to the nitrous to alcohol ratio. What a pain in the ****.