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well all i got to say is i love kenne bell. 2 weeks ago while i was getting my 3.73s installed a guy with an 04 Termie rolled up.....had a 2.8 kenne bell.....putting 550 to the wheels. all i can say is the scream that thing let out left a load in my diapers i havent experienced since childhood! couldnt even get on it until 90 mph.....MAJOR traction issues, what a ride! made my GT feel like a turd.......matter of fact made any other vehicle i have ever been in feel like, well u get the idea.
back to my point on posting. i love the way the kenne bell slammed me into that seat. it felt like INSTANT boost. do centri style S/Cs give near the pleasure a twin screw does?
i understand for a stock suspension as i have, a centri would be better to build boost over time....but is the thrill factor there like with the twin screws?
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2002 Mustang GT Convertible Mineral Grey 5 speed
- Magnapacks
- MAC off road xpipe
- Roush CAI
- MGW short shifter
- Ford 3.73s
- Diablo tuner
- FRPP "G" lowering springs
- Strange adjustable shocks/struts
the reason twin screws feel like that is because its instant power, were in the case of a centri is more like a turbo in the sence that it takes a little time to spool up. you can get a centri to feel like a KB or any twin screw, you just got to get a big enough one.
the reason twin screws feel like that is because its instant power, were in the case of a centri is more like a turbo in the sence that it takes a little time to spool up. you can get a centri to feel like a KB or any twin screw, you just got to get a big enough one.
Centri cars do not "spool". There is no lag like on a turbo.
A centri will make instant boost so long as you are in the RPM range that it makes boost. This is to say, if you start at 3500 RPM and the car makes a max of 4 PSI at 3500 (just making up numbers) as soon as you go WOT it will make 4 PSI. A turbo will not do so... even if you start in the correct RPM range a turbo will take time to build the boost.
This is a short vid I made in car, as we were (long time ago) having a similar discussion:
If you start in the correct RPM it will instantly pull, however if you start below about 3000 RPM in say 4th gear it will not do so. This is pretty easily fixed... shift the car into 3rd. Contrary to what seems like popular opinion, even a twin screw equipped car will pull harder at say 5000 RPM than 2000, regardless of the boost level its making, so either way your not gonna run around starting roll races from 2500 RPM
In the first few gears (1st and 2nd, 3rd as well depending on your gearing/power level) its not even really noticable, that is not building boost below around 2800 RPM. My car made more power on a mustang dyno at 3000 RPM than it did at any RPM before the blower on a dynojet (and dynojets read alot higher). Going from a launch I literally see about .1 seconds without boost, and the car is in full boost the rest of the run.
So far as the twin screw vs centri debate, the only real downside I see to the twin screws is the price. I have heard of them also loosing boost at the top of the band but this seems to mostly be the eatons and not twin screws. Price wise though its hard to compare, as your looking at an extra 1500 bucks easy compared to a centri kit. 1500 will go a long way towards that shiny new shortblock or suspension mods.
Put it this way, dollar for dollar I don't see any way you can make a twin screw as fast as a centri car. If your on a limited budget, the centri comes out ahead.
the reason twin screws feel like that is because its instant power, were in the case of a centri is more like a turbo in the sence that it takes a little time to spool up. you can get a centri to feel like a KB or any twin screw, you just got to get a big enough one.
Centri cars do not "spool". There is no lag like on a turbo.
A centri will make instant boost so long as you are in the RPM range that it makes boost. This is to say, if you start at 3500 RPM and the car makes a max of 4 PSI at 3500 (just making up numbers) as soon as you go WOT it will make 4 PSI. A turbo will not do so... even if you start in the correct RPM range a turbo will take time to build the boost.
This is a short vid I made in car, as we were (long time ago) having a similar discussion:
If you start in the correct RPM it will instantly pull, however if you start below about 3000 RPM in say 4th gear it will not do so. This is pretty easily fixed... shift the car into 3rd. Contrary to what seems like popular opinion, even a twin screw equipped car will pull harder at say 5000 RPM than 2000, regardless of the boost level its making, so either way your not gonna run around starting roll races from 2500 RPM
In the first few gears (1st and 2nd, 3rd as well depending on your gearing/power level) its not even really noticable, that is not building boost below around 2800 RPM. My car made more power on a mustang dyno at 3000 RPM than it did at any RPM before the blower on a dynojet (and dynojets read alot higher). Going from a launch I literally see about .1 seconds without boost, and the car is in full boost the rest of the run.
So far as the twin screw vs centri debate, the only real downside I see to the twin screws is the price. I have heard of them also loosing boost at the top of the band but this seems to mostly be the eatons and not twin screws. Price wise though its hard to compare, as your looking at an extra 1500 bucks easy compared to a centri kit. 1500 will go a long way towards that shiny new shortblock or suspension mods.
Put it this way, dollar for dollar I don't see any way you can make a twin screw as fast as a centri car. If your on a limited budget, the centri comes out ahead.
Just one thing to add I agree with what you are saying but most people don't realize out of that 1500 you need to subtract for a better flowing aluminum intake included with the K/B
that really depends on your plans for the car though. I don't have much inention of replacing the intake anytime soon.. it will be the last thing motor wise. MPH has quite a few 600+ WHP cars with the stock intake, as I have said over and over again its acutally a very good piece.
So far as on a stock motor, you can easily max out the potential of the stock shortblock with either blower + boltons, even with the stock intake on the centri powered car.
basically what I am saying about being on budget is this: Start with two cars with say full boltons and nothing else, and then purchase a i/c KB for one and a centri kit for the other. With the centri car, you have another 1500~ or so dollars to spend on a DIY intercooler kit and other mods. 1000 bucks will get you quite a bit... say a full suspension, or a set of custom ground blower cams + springs and a few other things.
Point being, with the same money you will have a faster car in the centri powered one. If you don't have to worry about budget so much, or arn't interested in having the absolutly fastest car for the money, its not an issue.
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S/Cs centri vs twin screw
