Hey guys,
Now this is not a thread on what is better... but here's my little dilemma
I am in the process of planning the rebuild for my BP... and I seriously thought that I was going the naturally aspirated route
My initial plan was to make a 150 whp protege, with a reasonably flat torque curve... not revving higher than 7500 rpm
Keeping the bottom end balanced and reasonably light by means of a balanced/knife edged crank, carillo A beam rods... and new bolts, and an aluminum flywheel
Higher compression pistons, with some mild head work, a new intake cam and an OEM miata exhaust cam
The engine management was still a bit up in the air, i was almost pretty sure on the greddy e-manage tho.
I felt that with these mods, along with some tuning and dyno time... 150 hp at the wheels was attainable and realistic.
BUT THEN...
i started thinking, after thats all said and done.... i still might not be too happy
I mean, its gonna be a lot faster than stock, but its not gonna be THAT fast...
Throttle response will be great, and the overall motor would have a good feel to it... but i dunno
so then i started considering keeping the same setup as above... however... keeping my stock pistons to keep compression down...
with a different choice of intake and exhaust cams... but turbocharging... at a modest psi... roughly 7-8
this way I figured 180 hp at the wheels would be an attainable goal... and a fair amount of a power increase from what i have now, a better torque curve because i wont need to rev super high to get my power... and just overall more power
the downsides that came to mind of going NA, is the overall lack of power, and the possibility that there will be poor low end torque
and downsides of turbo is that it is more finiky... i'd have to monitor temperature, air fuel, and be on guard for knock a lot of the time... i'd have to keep my eyes on my gauges on really hot days... as well as possibly turbo lag
i really am a fan of throttle response
SOOOO i was wondering if you guys could quickly post your opinions... what you think I should do??
now keep in mind, i want to know what you guys think is best for ME
and so you have a little more insight on ME... this is what i do:
my car is NOT a drag racer... i will only hit the drag strip for fun with my car club, just for fun... i will never compete... just have fun maybe once a year
my car is NOT a solo2 autocrosser... i will also only go to those events few and far between, just for fun... when i feel like it... maybe 1 or 2 a year
my car IS going to compete in solo1 .... where its timed laps on a road circuit
that is very important to me, and the car has to be able to do that well and reliably
and solo1 is demanding on an engine, because between timed laps, and practice laps... it is not uncommon to do 25 laps per event... so reliability is a must
my car IS my daily driver year round. i dont mind if it sees some down time for a few weeks every year, but its not a trailer queen... it drives me to work and school and everywhere in between
so guys and girls, if you could kinda let me know what you think is best for me, i'd appreciate it... because I need to set my mind straight on one, and work at it.
I cant be constantly changing my mind, or i'll just be wasting time and money.
Thanks!!
- chris
p.s. money is an issue, however it is not a deciding factor... if i do decide on a more expensive option, that is fine... that just means that I have to wait longer before i do it... but either way, which ever way i go... it is going to get done properly
and something else to bring to your attention, the BP engine was kinda designed with turbocharging more in mind, as opposed to high compression/high rpm
anyways... thanks!
Now this is not a thread on what is better... but here's my little dilemma
I am in the process of planning the rebuild for my BP... and I seriously thought that I was going the naturally aspirated route
My initial plan was to make a 150 whp protege, with a reasonably flat torque curve... not revving higher than 7500 rpm
Keeping the bottom end balanced and reasonably light by means of a balanced/knife edged crank, carillo A beam rods... and new bolts, and an aluminum flywheel
Higher compression pistons, with some mild head work, a new intake cam and an OEM miata exhaust cam
The engine management was still a bit up in the air, i was almost pretty sure on the greddy e-manage tho.
I felt that with these mods, along with some tuning and dyno time... 150 hp at the wheels was attainable and realistic.
BUT THEN...
i started thinking, after thats all said and done.... i still might not be too happy
I mean, its gonna be a lot faster than stock, but its not gonna be THAT fast...
Throttle response will be great, and the overall motor would have a good feel to it... but i dunno
so then i started considering keeping the same setup as above... however... keeping my stock pistons to keep compression down...
with a different choice of intake and exhaust cams... but turbocharging... at a modest psi... roughly 7-8
this way I figured 180 hp at the wheels would be an attainable goal... and a fair amount of a power increase from what i have now, a better torque curve because i wont need to rev super high to get my power... and just overall more power
the downsides that came to mind of going NA, is the overall lack of power, and the possibility that there will be poor low end torque
and downsides of turbo is that it is more finiky... i'd have to monitor temperature, air fuel, and be on guard for knock a lot of the time... i'd have to keep my eyes on my gauges on really hot days... as well as possibly turbo lag
i really am a fan of throttle response
SOOOO i was wondering if you guys could quickly post your opinions... what you think I should do??
now keep in mind, i want to know what you guys think is best for ME
and so you have a little more insight on ME... this is what i do:
my car is NOT a drag racer... i will only hit the drag strip for fun with my car club, just for fun... i will never compete... just have fun maybe once a year
my car is NOT a solo2 autocrosser... i will also only go to those events few and far between, just for fun... when i feel like it... maybe 1 or 2 a year
my car IS going to compete in solo1 .... where its timed laps on a road circuit
that is very important to me, and the car has to be able to do that well and reliably
and solo1 is demanding on an engine, because between timed laps, and practice laps... it is not uncommon to do 25 laps per event... so reliability is a must
my car IS my daily driver year round. i dont mind if it sees some down time for a few weeks every year, but its not a trailer queen... it drives me to work and school and everywhere in between
so guys and girls, if you could kinda let me know what you think is best for me, i'd appreciate it... because I need to set my mind straight on one, and work at it.
I cant be constantly changing my mind, or i'll just be wasting time and money.
Thanks!!
- chris
p.s. money is an issue, however it is not a deciding factor... if i do decide on a more expensive option, that is fine... that just means that I have to wait longer before i do it... but either way, which ever way i go... it is going to get done properly
and something else to bring to your attention, the BP engine was kinda designed with turbocharging more in mind, as opposed to high compression/high rpm
anyways... thanks!
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