litlred515

i have a 87 base with no mods other than a k&n air filter. this summer i want to put on a new exhaust, not sure if i wanna go header mid pipe and catback or if i wanna go true dual. i also wanna get a apexi AFC, aluminum flywheel and was thinking about a 50 shot od NOS. my engine is in great condition and was wondering if there's anything else i might need to add onto this to make it work properly and how much RWHP i should expect and what i possibly could run in the 1/4 mile? thanks!

dr0x

Id upgrade to the TII fuel pump, just because you are putting on nitrous. And please dont call it NOS, that is a brand name. To tell you the truth, Id rather have a NX kit. Just make sure you get a wet kit. Safer (I guess). On the juice Id say 190rwhp.

1987RX7guy

iTrader: (3)

Definatley go with the true duals. You will not regret it. I don't that is for sure . I have not talked to anyone that has them that does not loke them. I think he will be a lot farther than 190rwhp but that is just my oppinion. I believe he could break 200rwhp without Nitrous Oxide and he does not need to run the TII fuel pump the N/a fuel system is good up to 250hp. I would just recommend that he get a new fuel filter and replace the lines and have his injectors cleaned to make sure that he does not run too lean.

hypntyz7

Where did you come up with that??

We all know the stock t2 fuel system cannot support more than 225-240hp at all reliably. This is with a higher volume fuelpump than an NA, and with 4 larger injectors than an NA. How then, do you imagine that an NA fuel system can handle 250hp??

Id say the NA fuel system is good to about 160rwhp...

1987RX7guy

iTrader: (3)

then my engine should have blown up about two weeks ago.

1987RX7guy

iTrader: (3)

Ok stock the FC has about 122rwhp I have the "True Duals"wich are dyno proven to give 34rwhp on a healthy engine. I also have a cone filter which would proly be another 3-5hp depending on the brand. I have removed the Air Pump and A/C pumpmaybe giving me another 2HP I just cleaned my auxilary ports so those are working fine.

122+34+4+2=162

My engine is fine.

Taelem

where has it been proven that true duals give you 34 horsepower? that seems way too big a gain to me.

any dyno charts?
where does it give you the power, low or high end?

rxn00b

you DO need a bigger fuel pump to run nitrous. and the exhaust system makes a BIG difference. I it is said that it gives you a 20% increase in HP. I can feel the difference in mine, but that might also be the midpipe that I put in.

1987RX7guy

iTrader: (3)

OK maybe you do for the Nitrous Oxide but without N2O I have heard of people with porting and they are still running rich as hell. O and the Dual Exhaust gives you a 28% increase of Rear Wheel Horse Power and yes they have a dyno sheet to prove it. Here is the link: http://mazdatrix.com/r-ex86nt.htm

1987RX7guy

iTrader: (3)

there is the chart.

Taelem

wow, thanks guys
i want some duals, are they louder than a single. or quieter?

1987RX7guy

iTrader: (3)

Wll it depends on what you are doing.

1 Idling= very quiet
2 Reving it= loud
3 Cruising= Not loud
4 Accelerating= A little louder than reving
5 Decelerating= No sound
6 Redlining= ******* LOUD followed by some pops or FLAMAGE which i think is cool.


EDIT-- Remember that anything gets loud if you are hawling ***. Wankel7 has riden in my car and he says it is not loud. MAX-IMAL has heard my car also and he likes the sound. But don't forget that the Duals are expensive total cost for me was 1328 bux from mazdatrix to my house. I live in texas though it will vary if you live in another area farther than me.

rxn00b

i have the same exhaust from mazdatrix and it is loud as hell, but it sounds SWEET so definatly get that. I was roughly guessing on the gains from the exhaust I have looked at the dyno sheet. It made a LOT of difference to my car.

1987RX7guy

iTrader: (3)

RXnoob


Do you drive like a maniac?
The exhaust is only loud when your on it. WELL at least in my car. Shoot Wankel7 a PM and ask him about how loud my car is or MAX-IMAL they will be able to give you un-biased oppinions.

1987RX7guy

iTrader: (3)

Wait you have the HKS mufflers. I have the RB mufflers these are quiet I don't know how the HKS sound. Maybe those ARE loud and the RB ones are NOT loud. Well either way I here stupud fart canons over my exhaust every day so it is not too loud. I personaly like the stereo sound i got from them. ALways remember that LOUD is a qualitative not quantitative answer and is based on a persons oppinions.

dr0x

Maybe on a dry setup. However on a wet kit there is additional fuel being injected with the nitrous, which is why a wet kit is more safe IMHO. The extra fuel stops you from leaning out during its use. And you can even mix and match nitrous + fuel pills to run a tad rich during use. That extra alone is enough to over come a NA pump on say a 75 pill. You could probably sneak by with the NA on a 50, but Im willing to bet fuel rail pressure starts to fall off.