First Retail PhatBoyPerformance Rotrex kit SOLD!!!!
- Thread starter TRUUBLE
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Dalamar said:
:hammer: :hammer:
im happy for you Tad.. ill be happier though when i have one on my car! my dad is really interested in the Rotrex so maybe next year i could get one.. motor comes first but we are building it for boost. :dancing6:
DYNO NUMBERS!!!!! can't wait to see the results. i hope you guys are making respectable numbers.
i follow both ford and chevy tech info. fan of both. so, i'm going to share a bit of info on rotrex blowers from the other side.
there are a few people using the C38-81 unit in kits for LT/LS engines, so maybe we can learn some stuff from those who are using them.
W2W, a GM tuner, sells a rotrex C38-81 unit as well as KB units, vortech units, and porcharger units. their c38-81 kit costs $3,000 and is their cheapest kit. it includes the head unit and mounting brackets. no plumbing. One of their shop tunned cars, a GTO with a 392ci LS2, made 520rwhp with a maxed out c38-81. It made just over 650flywhp. Kevin at W2W states that the c38-81 makes out just around 650flywhp at 8psi on LS/LT engines. on the larger cubed engines, they feel the c38-81 is just too small of a unit. the c38-81 flows a max of 952cfm at 90,000rpm impeller speeds. the vortech s-trim and procharger p-1sc flow considerably more cfm at max impeller speeds.
But, here is the huge BUT, they say that the blowers are the most effecient they have and are more than worth the money for them.
why? because they don't have the typical linear boost curve of other centri units. they build low end boost much quicker than other centri units and tend to have better torque curves as a result.
comparing a twin vs the rotrex vs other centri's you have this.
the twin builds boost instatly, but has poor high rpm flow.
the typical centri builds boost slowly but has lots of high rpm flow potential.
the rotrex DOES NOT build boost as fast as a twin, it DOES NOT have the high rpm flow potential of a typical centri, BUT it DOES build boost faster than a typical centri and DOES have more high rpm flow potential than a twin screw.
it is a good middle of the road blower. nothing more, nothing less.
is this $3,500 kit worth it? IMO, depending on dyno results to come... worth every damn cent.
If, you are looking for reliable, cheap, effective middle of the road performance. i wouldn't argue against this blower.
i have no doupt that at 6-10psi (a 281ci mod will see more boost from this blower than the bigger LS/LT engines do) that the c38-81 rotrex will outperform a s-trim/p-1sc. it will have comparable peak numbers, with a better curve.
IMO if you are looking for 10+psi and 450-500rwhp, a vortech or procharger is also worth ever cent of their $5,000 price tags.
i follow both ford and chevy tech info. fan of both. so, i'm going to share a bit of info on rotrex blowers from the other side.
there are a few people using the C38-81 unit in kits for LT/LS engines, so maybe we can learn some stuff from those who are using them.
W2W, a GM tuner, sells a rotrex C38-81 unit as well as KB units, vortech units, and porcharger units. their c38-81 kit costs $3,000 and is their cheapest kit. it includes the head unit and mounting brackets. no plumbing. One of their shop tunned cars, a GTO with a 392ci LS2, made 520rwhp with a maxed out c38-81. It made just over 650flywhp. Kevin at W2W states that the c38-81 makes out just around 650flywhp at 8psi on LS/LT engines. on the larger cubed engines, they feel the c38-81 is just too small of a unit. the c38-81 flows a max of 952cfm at 90,000rpm impeller speeds. the vortech s-trim and procharger p-1sc flow considerably more cfm at max impeller speeds.
But, here is the huge BUT, they say that the blowers are the most effecient they have and are more than worth the money for them.
why? because they don't have the typical linear boost curve of other centri units. they build low end boost much quicker than other centri units and tend to have better torque curves as a result.
comparing a twin vs the rotrex vs other centri's you have this.
the twin builds boost instatly, but has poor high rpm flow.
the typical centri builds boost slowly but has lots of high rpm flow potential.
the rotrex DOES NOT build boost as fast as a twin, it DOES NOT have the high rpm flow potential of a typical centri, BUT it DOES build boost faster than a typical centri and DOES have more high rpm flow potential than a twin screw.
it is a good middle of the road blower. nothing more, nothing less.
is this $3,500 kit worth it? IMO, depending on dyno results to come... worth every damn cent.
If, you are looking for reliable, cheap, effective middle of the road performance. i wouldn't argue against this blower.
i have no doupt that at 6-10psi (a 281ci mod will see more boost from this blower than the bigger LS/LT engines do) that the c38-81 rotrex will outperform a s-trim/p-1sc. it will have comparable peak numbers, with a better curve.
IMO if you are looking for 10+psi and 450-500rwhp, a vortech or procharger is also worth ever cent of their $5,000 price tags.
mean green
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ics: ics: ics: ics: ics: ics:tooslow said:
Well said.
I agree about the C38-81 not being able to handle the bigger cubes, which is why I would do twins if I put them on my 427. And, we will be offering twin kits for larger displacement motors at some point.
People need to understand (as you stated very well) that it's not the peak numbers that will be overly impressive, but the flatness of the power curve. This is a very "streetable" blower.
i'd like to see this drive system used on higher CFM head units. being a manufacturer who distributes to tuners who deal mostly with smaller displacement engines, finding the incentive to build larger blowers is hard for rotrex to do.
i'd like to know what kind of performance can be had from a compressor with the same flow potential as some of the other centri units. (t-trim/YSi - d-1sc/F1)
i'd like to know what kind of performance can be had from a compressor with the same flow potential as some of the other centri units. (t-trim/YSi - d-1sc/F1)
I'm with you Tad... Rotrex probably has designs for larger units sitting on the table right now, but without a demand for them its not very smart to start pumping them out. Especially for a company that doesn't create units for specific vehicles or applications.
Jrgunn5150
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See what happens when you search? Lol Congratulations, but your website sucks!Lol, seriously, there is nothing on there. Is there a 99-up kit? How much is it? Whqat kind of lead time on shipping?
Jrgunn5150 said:
Yeah . . lol . . there's nothing on there because we don't have product to ship, yet . . except for the 94-95 kits. We will have 87-93 kits ready to ship in a couple of weeks, and 96 2-valve kits will be ready in about a month or so.
We are working our way toward the 99 and up kits, but it will be a while.
bLuE x said:
Thanks, Mel! 8)
Jrgunn5150
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Awesome, thanks. Will pricing be in line with the other kit's roughly?
