Supercharger choices

[mrrob96fs]

Ok I am ditching the heaton and have some questions for people that have toyed with twin-screws.

I thought I was going to get the Kenne Bell 2.8l Blowzilla for the Termi, was all set to purchase it and Whipple comes out with a 3.4l twin-screw.

I know Kenne Bell has a great reputation as THE blower for Termis, Whipple makes a good product too, but will this new 3.4l be that big of an improvement over the 2.8 blowzilla?

I also read that the Whipple requires "minor" modification of the hood for fitment issues. I would have to ditch the strut tower brace for sure then but just how minor is minor? I don't want to cut a hole or even remove the sound deadening material(unless it is clipped on and can easily be replaced.) The Whipple also claims to require aftermarket fuel rails, any reason why this is? I mean if the stock fuel system can support 13 psi from the blower, why need fuel rails?

My goal for the car is mid 600's rwhp and as much efficiency out of a blower as I can get. The reason I am looking at the larger displacement blowers is I read they require less RPM to produce the same boost levels as the smaller displacement blowers. Is this correct and will it reduce parasitic loss and IAC temps?

Also at this power level... 640-670rwhp to be safe... what size injectors will I need and does anyone have a suggestion for a fuel pump? In-line or in-tank?

Thanks in advance.

 

[SVT98Snake]

3.4 or 2.8 are overkill unless you plan on wicked boost and mods (motor, cams....)

 

[Gearbanger 101]

Either blower will easily get you into the mid-600's on pump gas. So go with whichever one is cheaper and/or provides better customer service.

Also, you can't just look at blower RPM to determine what ACT's are going to be. Twin Screw are rated to be more efficient at higher boost levels than say an Eaton, so spinning them hard won't necessarily be detrimental to performance. Also, Kenne Bell has a couple of different port configurations available for the 2.8L, so you might want to look further into it before making a decision. Just make sure you get an objective opinion. Kenne Bell has a rep at adding a lot of unnecessary "hype" to their sales pitch.

That being said, you might want to check out Whipples smaller 2.3L and KB's 2.6L units too. They'll get you where you want to be with a lower price tag.

 

[mrrob96fs]

Thanks for the great input guys. I do have my heart set on the mid 600s for my rwhp mark so the 3.4l and 2.8l do seem to be a bit of overkill. I believe it also that Kenne Bell has a lot of hype and that big name to choke a few more dollars out of people.

For the horsepower I am looking for, it seems like I'll need to run about 21 psi of boost to make it... Do you guys think the smaller 2.3l Whipple could efficiently support this? It seems to be at the edge of Whipple's rating, which is 8-24 psi. Also, will the stock fuel rails support this power level?

Thanks for the help so far.

 

[SVT98Snake]

Thanks for the great input guys. I do have my heart set on the mid 600s for my rwhp mark so the 3.4l and 2.8l do seem to be a bit of overkill. I believe it also that Kenne Bell has a lot of hype and that big name to choke a few more dollars out of people.

For the horsepower I am looking for, it seems like I'll need to run about 21 psi of boost to make it... Do you guys think the smaller 2.3l Whipple could efficiently support this? It seems to be at the edge of Whipple's rating, which is 8-24 psi. Also, will the stock fuel rails support this power level?

Thanks for the help so far.

My buddy hit 644 on 19 psi with a KB 2.2...stock motor.

He then traded that for a Whipple 2.3 and said he wished he kept the KB. He said better torque. What reasons, I don't know, but I have heard that on more than one occasion.

 

[mrrob96fs]

Interesting... I wonder why. Unfortunately KB doesn't sell their 2.2l anymore. It only comes in 2.6l flavor now. Does this also fall into the overkill category you think?

 

[Gearbanger 101]

First off....what are you more hung up on? You wanna build an ultra fast street car, or are you looking for a dyno queen? I met up with a buddy this summer at a T-Bird/Cougar shoot out that was running consistent 10.7's@127mph with his 2.3L Whipple blown 2V Thunderbird. This was a full weight nearly 4,000lb car running full interior and still had it's factory air conditioning in tact. Last he checked, he was putting down about 550rwhp@15psi. So as you can see....it doesn't take really big dyno numbers to make an ultra fast street car.

 

[mrrob96fs]

I want both preferably. My goal is 650 rwhp purely for my own personal reasons. I can do it with the 2.3l Whipple and I think I am going this route. Further interweb sluething points strongly at KB being horrible with customer service. The products seem to be pretty much even with a slight nod of higher quality at the Whipple. So my choice is made. Big thanks for the help guys.

 

[SVT98Snake]

First off....what are you more hung up on? You wanna build an ultra fast street car, or are you looking for a dyno queen? I met up with a buddy this summer at a T-Bird/Cougar shoot out that was running consistent 10.7's@127mph with his 2.3L Whipple blown 2V Thunderbird. This was a full weight nearly 4,000lb car running full interior and still had it's factory air conditioning in tact. Last he checked, he was putting down about 550rwhp@15psi. So as you can see....it doesn't take really big dyno numbers to make an ultra fast street car.

I don't think he wants a dyno queen, but he wants the power to run what he wants....650 rwhp vs 550 rwhp is more potential any way you slice it.

Dyno's are just a safety measure for your tune and to perfect your combo.

 

[SVT98Snake]

Further interweb sluething points strongly at KB being horrible with customer service. The products seem to be pretty much even with a slight nod of higher quality at the Whipple.

qft....plus bell and the owner of whipple split which is why there are now 2 companies.

 

[04sleeper]

I would go with the new Gen II Whipple 2.3. It just came out last week.

 

[Gearbanger 101]

I don't think he wants a dyno queen, but he wants the power to run what he wants....650 rwhp vs 550 rwhp is more potential any way you slice it.

Dyno's are just a safety measure for your tune and to perfect your combo.

I realize that. I just wasn't sure if he was aware how fast he could actually go with even 50-100rwhp less. I wondered if he was more concerned about bragging rights, or hitting a particular goal. I thought maybe knowing he could still run well into the 10's with less power (and thus an easier attainable goal) would make him feel a little more at ease with his blower selection?

 

[SVT98Snake]

I realize that. I just wasn't sure if he was aware how fast he could actually go with even 50-100rwhp less. I wondered if he was more concerned about bragging rights, or hitting a particular goal. I thought maybe knowing he could still run well into the 10's with less power (and thus an easier attainable goal) would make him feel a little more at ease with his blower selection?

I totally agree....

My point prior to that was that KB's to me feel more violent....for a car I drive a lot, I love the violent power. I have been in/driven cars with both blowers....the Whipple to me just didn't have as much 'umph' as the KB.

as far as power to run...you can run 10's with 500 rwhp....if driven to hell and back

For me, I would like to have 650 rwhp, run 10's easy and not break my car vs. having 550 hp, and run 10's but break things from abuse.

 

[mrrob96fs]

I've read both about the power differences. I've read Whipple gives you more torque and I've read KB gives you more torque. I am turned off completely by how many people mention problems with KB. Then on the other hand, every Whipple owner says they love it... and the KB owners have nothing really bad to say. I am going to check out this GenII blower.

Also I want the power for some bragging rights, but to consistently and easily run in the 10's as Snake said.

I am looking at a lower and changing upper as I want to move between 17psi for street driving and 21-23 psi for HOLY CRAP fun.

Thanks.

 

[big power]

I am so sorry to say you will spend some were around 3,500 to 5,000 dollars on the blower. If you want black, satin or chrome. f--- all that go with turbos or if you have 2,000 to 3,000 more then go with twin turbo.

 

[mrrob96fs]

I don't like turbos. I like positive displacement blowers. I have driven turbo, nitrous, centrifugal and positive displacement supercharged cars. I absolutely love that full boost at 2500 rpm and the mechanical whine. Turbo sounds like a blow dryer and while the peak numbers are impressive... I want boost below 4k rpm.