Hey, I am new to the honda game. I have a b20 with a b18 head in my civic and I wanted to get into forced induction. Turbo takes a lot of work and money so I was thinking about going with something smaller and easier to work with first. From my research Centrifugal SCs are pretty simple but have lower boost levels. I was thinking about trying one on the b20... any experience in this area?

 

Instead of answering this, I'll tell an off topic story.

I was watching a car show recently. They took a $200 turbocharger they got off a diesel truck. They then slapped $600 worth of wastegates on it. Guess this is relevant because even if you some how get a cheaper super charger than a turbocharger, all the extras like the waste gate will add up to be the same price.

 

Okay, I never heard that... I just read that, in general, centrifugal SCs were cheaper... and again, less work as far as piping and intercoolers and such. Im running an all stock b20 block, so i figured just small boost for my first step into forced induction. I heard around 10 is a safe place without worrying about damaging sleeves etc.

 

its all in the tune.

 

I don't believe a supercharger would be any different. Perhaps because superchargers are sold as complete kits vs many turbochargers are pieced together but you can get a complete kit as well.

 

You are VERY mistaken OP. Go and look up the prices brand new for each and you will find turbos to be much cheaper. If you go the used route, superchargers almost always need rebuilt and probably half the turbos. In my opinion, used performance parts are NEVER an option. Also, superchargers are more complex since they add a belt to the equation and if you did go centrifugal it would be exactly like a turbo but with more parts (belt).

 

Centrifugal supercharger = belt driven turbo - the mid range boost.

 

JRSC setup's love displacement. 2.0 liter would be a good start.

B18 head? Vtec?

You can find a good used kit for around $1,100 or so

Just search the threads. There is a lot of info posted.

 

supercharger and turbo have almost the same cost, so i d prefered a cheap T3/T4 ebay turbo kit with 71mm inducer, because with the supercharger you cant adjust the pressure whenever you like.

generaly i detest superchargers because they are fixed boost

 

^^Ebay turbo kit? You may detest superchargers, but I have a bigger problem with Chinese garbage parts and the people who suggest them

 

And they aren't fixed boost. You can change blower speed with different size pulleys.

 

you can also control boost via the bypass valve and a Mac valve

 

i didnt say anything about chinese turbo kit or chineese turbine.

cheap doesnt mean chinese

there are cheap garret journal bearing turbos that are easy (and cheap) to be serviced

i dont believe that it is easy to replace the supercharger's pulley while you are driving...

MGRIM to be honest, i didnt know this thing with the mac valve, i ll check it, thanks for the tip...

 

^^That'd be ok advice, but that's not what you said.

In internet language, cheap Ebay turbo kit (your wording, not mine) = made in China $600 turbo kit garbage. Not a single one of these ebay kits comes with a journal bearing Garrett turbo...

 

i dont suggest chineese turbos but i strongly recomend chineese intercoolers (for low cost applications, not proffessional drag race).

there are some ebay kits that have garrett T3/T4 600HP, thick and durable cast iron exhaust manifold, ok pipes and chineese intercooler.

In the end, you are going to get almost the same power as with expensive turbonetics turbos, tial external wastegates, etc...

the max flow of the turbo compressor matters and almost nothing else...

 

This just isn't true at all... I am not sure why you actually believe what you are saying. Must be due to lack of experience. And max flow of the turbo isn't as important at where you are on the compressor map to be trying all of this.

 

Another supercharger thread jacked by turbo arguements. WA WA WA

Take it elsewhere people.

 

because many people don' t understand the compressor maps, knowing the max flow at cfm or lb/min can give a very convinient view of the spool up rpm and the expected max power. Anyone that knows of turbines, understand that....

I must say again that i recomend low cost turbo kit not for drag race but for somone that just want more and cheap power from his acuura/honda. If the max flow of the cheap turbo is similar with the max flow of the expensive turbocharger, the gain will be almost the same...

 

QFT

 

any how, if i wanted a supercharger kit, i would prefer a rotrex C30-64 κιτ for low rpm gain and drivability, and a C38-71 kit for 600+ HP

 

Rotrex is the way to go IMO... kraftwerks has a b series kit now IIRC.

rmcdaniels also had a company (magnus? can't remember who exactly) that built a large displacement roots type blower that simply destroys the power limits of the old JRSC kits.

 

A lot of big money names throwing around, but you can put together a basic turbo kit for relatively small money if you know what to buy... log mani, oem or used turbo, internal gate, hoses, clamps, management... you can do it for cheaper than a new supercharger kit for sure.

I'm looking to try out an old JRSC setup myself for some extra power at local autocrosses... but I intend on revamping all used parts, rebuild the roots charger if necessary. Even used jrsc kits hold their value... and forget old Vortecs... people still asking a heap of money for them. If you are baller and can afford a Rotrex or Kraftwerks... well, no need to post... call the manufacturers and I'm sure they'd be happy to give you some advice if you're actually buying.

 

A gt2860 or gt2871 make for perfect autox turbos. lightningteg had a gt2860 on a bone stock ls and at 20psi he made 300whp and 300lbft.

 

All depends on what you want.

I would love to use a Gt2860RS, but I run a modified version of solo II and the 2860 is just not for the types of courses. I can't imagine running over 250wtq on a fwd on street tires in an autocross.

 

The toyo r888 has no issues putting 300hp to the ground... and it's dot legal so technically it's a street tire.