Cant go higher then 175chp
Hello, i race in a local time attack series with not very limited rules. Pretty much my only rules i have to stay within is 200tw tires (225 rival s 1.5) and then staying in 12:1 hp to lb. I had my car weighed with a full tank it was 2120 this tells me i can pretty much get 175 at the crank. The race sanction takes your wheel hp and adds 15% if your 2 wheel drive so thats about 150 to the wheels. The motor i have in the car is a automatic 1.6, i say auto motor because supposedly they have a smaller intake cam and lower compression. Im looking to focus on power this off season with that being said 1.8 swap/supercharger/turbo give me advice. I know with 1.8 i will still be pretty low on power. The supercharger would put me right their but im just not a fan of them. I would love to do a low boost turbo build but kinda scared of making too much power
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you can drop in a vvt long block with bolt ons and achieve 150hp without even needing boost.
that's a very modest power goal and super easy to reach. |
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Sounds like you're running the PPIR series. I'd recommend an MKTurbo kit and then just turn the boost down to 5-7psi for competition and enjoy 10+ on the street. I was driving the black Miata in RA with an MKTurbo kit last weekend, the turbo response is excellent.
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Originally Posted by vitamin j
(Post 1436474)
Sounds like you're running the PPIR series. I'd recommend an MKTurbo kit and then just turn the boost down to 5-7psi for competition and enjoy 10+ on the street. I was driving the black Miata in RA with an MKTurbo kit last weekend, the turbo response is excellent.
im the maroonish red na6 89 rb i think you talked to me two events ago askin if i was running ms and asked about my paint |
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VVT Swap with bolt-ons should get you right there with no issues.
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Yea as much as i would like to turbo i think im goin to go the vvt route
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The NA route makes a lot of sense, but if youre feeling adventurous you could take advantage of the rules by building a turbo setup that makes lots of torque and stays under the max power. The trick would be to use a restrictor with a small turbo. Run "all of it" at low-mid RPM and let the restrictor choke it down at higher RPM. With a responsive turbo you could get something like this dyno.
Attachment 229838 |
Originally Posted by Full_Tilt_Boogie
(Post 1436846)
The NA route makes a lot of sense, but if youre feeling adventurous you could take advantage of the rules by building a turbo setup that makes lots of torque and stays under the max power. The trick would be to use a restrictor with a small turbo. Run "all of it" at low-mid RPM and let the restrictor choke it down at higher RPM. With a responsive turbo you could get something like this dyno.
https://i.imgur.com/agrGB0u.jpg |
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This tiny turbo, high rpm, boost bleeding theory sounds way overly complicated, over expensive, less reliable, and not very much fun to drive, all for very little gain. N/A VVT makes plenty of tq down low, not that you're driving at 3000rpms on a track anyway. I'm as big of a turbo fanboy as anyone, but at that power level it just makes no sense to me.
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Originally Posted by pdexta
(Post 1436873)
This tiny turbo, high rpm, boost bleeding theory sounds way overly complicated, over expensive, less reliable, and not very much fun to drive, all for very little gain. N/A VVT makes plenty of tq down low, not that you're driving at 3000rpms on a track anyway. I'm as big of a turbo fanboy as anyone, but at that power level it just makes no sense to me.
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how about a gt2052? or something like or smaller than a kp39
https://cimg3.ibsrv.net/gimg/www.mia...a4438ace68.jpg |
you don't need to run a small turbo, just make sure your wastegate is big enough to allow you to waste the boost.
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Originally Posted by Jitwontee
(Post 1436503)
Ha small world yea i run in rb at the ppir tad and i want to stay in rb for next year. Im leaning towards a turbo with real low boot because their is room to grow so when im ready for the class switch i already have it figured out.
im the maroonish red na6 89 rb i think you talked to me two events ago askin if i was running ms and asked about my paint |
I agree with everyone suggesting a VVT with bolt ons. A turbo for that little of a power boost is not worth the cost/weight of the entire system. Think about it, you'll need to add the weight of a turbo, all of its necessary lines, intercooler, and charge piping.
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I just want to see it for science. VVT/bolt-ons would probably win races.
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Originally Posted by Lexzar
(Post 1437071)
I just want to see it for science. VVT/bolt-ons would probably win races.
But im trying to win races not win a science fair, im on the lookout for a vvt motor now. |
It would be quite fun to make 20psi by about 2-2.5krpm
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