n/a beast

[prozeke07]

hey guys first time looking in the n/a section but heres my ? has anyone run higher compresion pistons here if so what ratio and gas im trying to stay with 93 oct but i dont know what kinda compression ill be able to run and what kind of hp are we looking at with say 11:1 to 12:1 with hotter cams pulleys possibly a little wait on the pnp but i will also be running a aem ems from mam any help will be appreciated i allready have 4to1 headers 2 1/4 full exhaust cold air underdrive pulleys fidanza 9lb flywheel and clutchmasters stg2 clutch. i should also mention i will be runnung quit a substantial about on direct port nitrous once the internalls are built nothing less than 75 shot looking at 150 (blowup) . also what have people done to raise thier redline and how high have you gotten. this will be a daily driver since i have my rx7 which is in process of cosmo swap.
just a little help guys please
thanks

 

[Nightmare]

nitrous is FI..


sounds good though, is the AEM ems stand alone? cause your gonna hear about microtech from twilight any minuite now lol

 

[Nightmare]

... ok i read that over


i take it back. re think your project.

 

[Gen1GT]

nitrous is FI..


sounds good though, is the AEM ems stand alone? cause your gonna hear about microtech from twilight any minuite now lol

Nitrous isn't FI. It's a 'power adder', but it's not forced induction. Prozek, I see no reason you won't be able to run 12:1 CR with proper tuning. Forged pistons, improved quench area, polished combustion chamber, big-ass cams etc. Jamie's got the closest thing to what you're looking at so far, so he might be the best to comment.....

 

[twilightprotege]

microtech! (just for you pseudospeed)

get the rest of the engine done before you go HC pistons as they dont add massive amounts of power for the dollar investment

 

[scorch70]

Nitrous + high compression = BOOM?

On a similar note, is it possible to run such high compression (11:1 and up) and nitrous at the same time? Isnt this asking for trouble? Im just wondering because I have considered the same.


Thanks,

 

[Nightmare]

On a similar note, is it possible to run such high compression (11:1 and up) and nitrous at the same time? Isnt this asking for trouble? Im just wondering because I have considered the same.


Thanks,

thats exactly what i was just thinking, 12:1+150.. (eekdance)

ive always called nitrous FI. i suppose you could think of it as a fuel additive, but the fact that it changes the atmosperic pressure going into the engine drasticaly from what fuel does, to what turbo does.. i dont know. heated debate i guess

 

[anarchistchiken]

As much as I respect all you guys who are pushing the NA envelope on our cars (or planning to), I just don't think it's worth it on our motors. They're such an old design that they've pretty much been tapped out as far as NA power production goes by Mazda just to keep them competitive with new honda/nissan/toyota engines. Good luck to each and every last one of you, and I hope that you kick my ass someday (on the track) and throw FI to the mud and stomp on it and laugh.



It's a metaphor. It's also 6 AM and I havn't gone to sleep for 36 hours, so dont blame me if that made no sense.

 

[twilightprotege]

n2o + HC = good. why? lots of oxygen and fuel in a very small space. just like high psi FI. however, like high psi boost, dont push it

 

[Nightmare]

our engines cant take high psi boost, detonation..


someone swap in a 2.3i, i want one in my sedan

 

[stdntDrvr]

i'm pretty much planning the same thing (12.1:1, but no no2)...i need a spare motor to do the work on...i may try to talk the wife into the MAM block within the next year...then all i'll need is a head and engine management.

 

[Gen1GT]

Going from 9:1CR to 11:1 will only add about 4% more power(and torque), but jump to 12:1 and an overbore, and I see no reason pistons alone won't give you 10whp or more.

In my case, going from 8.8:1 to 12:1 with a 2mm overbore will probably give me 15whp, and better able me to take advantage of lumpy cams.

 

[BlkZoomZoom]

How did tripoint get 240hp out of the 2.0l? I thought they were only like 11:1 compression? I may be mistaken.

 

[Hughes412]

How did tripoint get 240hp out of the 2.0l? I thought they were only like 11:1 compression? I may be mistaken.

I have their number if you want it. I also have the nuber of the guys that built their motors. I plan on giving them a call when I have the money to do so. Tripoint is selling their Proteges 50k! (first)

 

[BlkZoomZoom]

If I had 50k, I wouldn't spend it on a protege. No offense, lol.

 

[scorch70]

How did tripoint get 240hp out of the 2.0l? I thought they were only like 11:1 compression? I may be mistaken.

Heres all the tech info I could find on their car. I asked them about the intake manifold that they used, when I called about ordering cam gears. They said "no sale."

 

[BlkZoomZoom]

Damn, I was off alittle. 13:1...

65mm throttlebody with Mazda part number? Whats ours is stock?

 

[scorch70]

Damn, I was off alittle. 13:1...

65mm throttlebody with Mazda part number? Thats what ours is stock?

I think ours is 50 mm stock. Could be wrong tho.

EDIT: sorry, looks like according to corksport, our stock TB is 55mm.

 

[BlkZoomZoom]

interesting. I wonder if thats actually a good part number, I guess I'll find out tommorow.

 

[Hughes412]

If I had 50k, I wouldn't spend it on a protege. No offense, lol.

Non taken lol, I laughed when he said it. But if you did want to race this is an all out race car with a winning history. But you have to rebuild it every somany miles. That would suck. But damn that would be a fast NA.