Zeniceguycrx

LAUNCH CONTROLE, NO LAG ---- caps was on

0b00st0

You see the problem here is that most people don't know what they are referring to when they speak of this LAG. They are mostly speaking of BOOST THRESHOLD. Boost threshold is the rpm at which "FULL" boost comes on in each gear (yes each gear is has a different boost threshold because of the transient changes in rpm and the load on the motor).

Lag is the time it takes for full boost to come on after the boost threshold.

There will always be lag on any motor/turbo combo. It can be reduced however, but none the less it will be always present. Even superchargers have lag. It just tends to be shorter.

Even N/A motors have a "lag." Vacumn doesn't go away instantly. It still will take some amount of time.

hyper4mance2k

True there will allways be some sort of lag. But the reason A lot of honda guys go t3/t4 is cause the t3 is a nice small turbine and will spin rather quickly. and the big t4 side will makes ots of boost. The key to low lag is a smaller turbo. For example If I was to put a t3 on my 13b then I would litterally boost at idle and there would be almost zero lag about 1/10 of a sceond worth, but the turbo would be maxed out at 3000k rpms, and be nothing but a restriction for my high reving rotary after that. I'm not to much of an athurity on turbo hondas. I'm a weber guru though. Direct all weber carb questions here. LOL! I hate how carbs get a bad rep in the import tuning world. A properly setup carburetor will allways make more peak HP than fuel injection.

hyper4mance2k

Wow I know I'm going to take heat for the carb statement so I'll preemptivly defend myself. It is true that FI is much easyier to tune and you will allways make more HP and TQ across the revrange with FI over carb, but a carb properly setup will allways make more peak HP than fuel injection. The reason is air intake temprature. When air crosses the choke velocity increases and there is a pressure drop and the venturi effect pulls fuel out of the bowl into the air streem. While this happens there is a dramatic drop in air temps. Cooler AIT's more power. In the winter and fall times I would get ice on my intake manifold when the car was running at full opperating temp. The drop in AIT is usually in the neighborhood of 20-50* from ambiant.

Erich

I run a centrifugal blower on my 97 mustang. I don't really understand why they would not be good on hondas. While you get a noticable increase in power thruout with a centrifugal, you get most of the power above 3000 rpm. So it should be a perfect match for a high reving motor. Turbo vs supercharger arguements aside
The roots style blowers are a different story. Getting instant torque is kind of the opposite of the powerband on a honda. That is why it seems funny that people always want to run the roots blowers on there.

I guess with turbos, you have ultimate flexibility. On my 89 TT 5.0 mustang, the motor redlines at 6K so I set up the turbos on the small side to spool quick and max out not too far above the redline on there. That seems to work pretty well.
Erich

beerbongskickass

You can't really compare your car to a honda. Your mustang is RWD and you can put big fatty tires on it, so you have traction. Our hondas are FWD with dinky tires, so traction is a big issue. Your car also has a V8 compared to our tiny 4 cylinder motors, so you actually have power to turn the S/C. The powerband between your car is also very different, a b-series motor is going to start making good power around 5k, which is getting close to your redline, and we can rev all the way to 8-9k.

The S/C kits out there for hondas are expensive and don't make ---- for power, the majority of the b-series S/C hondas I see on honda-tech or other car forums are lucky to make 250whp at 10psi, and you can't turn the boost up anymore because the S/C isn't efficient past that. If somebody makes a custom S/C kit, then I'm sure they could get it to work well on a honda, but your basic JRSC kit or other kit is crap.

Obscene_CNN

All turbos will have some lag because they don't have a direct coupling to the engine. Superchargers can have lag too. With a supercharger lag is caused by excessive volume in the piping to the intake manifold. Having an intercooler will aggravate this problem even more.

Roots and centrifugal superchargers both suffer from lag the same. Where a roots supercharger has an advantage is it will generate boost at lower rpms than a centrifugal will (Note: this is not lag). A roots supercharger is not subject to surge and choke conditions either. A roots type supercharger has some drawbacks though. It is not as efficient as a centrifugal supercharger. This lack of efficiency means more parasitic power drain and increased charge temperatures.

Turbos will generate more power than a supercharger however. Turbos extract power from energy normally just blown out the tail pipe. This energy that is utilized by the turbo is the blowdown pressure in the exhaust stroke and heat( turbos convert some of the exhaust heat to work). Unfortunatly turbos do create additional backpressure and are affected much more by intake volume induced lag.

To reduce intake volume lag take the following steps. Keep all piping runs between the compressor and the intake manifold as short as possible. If an intercooler is used try to keep the piping run between the intercooler outlet and the intake manifold as short as possible because a cooled charger occupies less space than a warmer one. If you are willing to trade off charge cooling capacity for less lag, an air to water intercooler would be a good choice instead of an air to air intercooler as the volume is less in the air to water intercooler.

beerbongskickass

You guys are getting too technical for me lol.

Turbocharger on a Honda = Good

Supercharger on a Honda = Poop

This isn't homemadesupercharger.com...

:P

BoosTedZSix

^^for shizzle. why would it have TURBO lag? its a supercharger

hyper4mance2k

Cause a supercharger is a belt driven turbo charger. Fine we'll call it boost lag.
And turbo's arenot free hourse power. Try this run your car with a nice header, then put a manifold turbo and dp on and don't hook up the charge pipe. Now tell me if all that back pressure hasn't cost you any power. Turbos are not free HP since you need HP to turn the fan.