Its just a quick question.Ive got a blitz intake and blitz catback as well as having done the vacuum hose job.Im just wondering if anyone with the same blitz parts has dynod their car or if anyone with a intake and catback has dynoed their car.If so what were your hsp and torque figures at the wheels and what would they be at the crank.Just very curious because the car feels very strong right now.

 

hmm no answers yet.there must be someone that was crazy enough to dyno their car after adding an intake and catback.Or maybe im the crazy one.LOL.

 

cmon fellas.someone must have a rough idea of how much horsepower im putting down.

 

Intake: ~5hp
Exhaust: ~20hp
Vacuum Job: 0hp

 

If your car feels a lot stronger & more responsive, then it's prob because you had a boost leak somewhere before the hose job.

I think Import Tuner had a "power pages" a few years back with a red fd that had the blitz intake & exhaust, w/ either the hose job done or s-afc. I think the guy got ~ 235 or so.

*if I come across it i'll pm you

 

I think the intake is worth more than 5 HP. I would guess 15

 

I was thinking, "at the wheels". Even then, with intake solely w/ stock precat/cat/exhaust, I doubt that you'll see *that* much of a gain. Of course if you show me a dyno sheet to prove it I'll believe you.

 

You show me your dyno, and I'll show you mine

Of course, I don't think either of us has a dyno. As I said, I would GUESS about 15 hp.

 

OK, I'll pull mine out of my ***. Bet you'll do the same.

 

hmm.I think i have that issue.Ill look it up.But i think it was the apex intake and the apex catback.

 

I was going to look for something in my ***, but I found this instead. From Steve Cirian's website:

**N-Tech
The N-Tech intake looks to be very similar to the Pettit one, but with improved sheilding and cold air intake. The following is from the vendor:

To: Nick Riefner
Date: Tuesday, July 07, 1998 5:15 PM

The N-Tech Engineering Fresh Air Intake System (FAIS) for '93-'95 RX-7's comes as a complete kit, including filters, hoses, clamps, ducts, nuts, bolts, washers, shielding, etc., The ducting alone is available as well. The kit draws air from the front of the car on all models, and from the passenger side front air opening on non-R-model cars. The air is channeled to the filters by way of aluminum ducting, with a back wall that runs from the hood down to the bottom pan/subframe. This assures that the air that enters the system must go to the filters.

A stock RX-7 was put on a chassis dyno, and made 216 rear wheel horsepower. The N-Tech intake was then installed in less than ten minutes, and the car then made 229 rear wheel horsepower. The results should be even better when the car is moving, due to the 'ram' effect that will happen due to the ducting.**

 

wow a whole 13 horses at the wheels.impressive.but unfortunately i dont have a cold air intake as mine is an open element air filtration system.I did cut away some unnecesary plastic that should have improved airflow to the filters though and also moved the fusebox in order to decrease the restriction.So who knows.But im thinking of perhaps making some kind of ducting to channel the cold air to the filters thus having a ram air effect without having to worry about the filters sucking up any water.

 

ok I managed to find the article in the power pages section.
the car had the vacuum job done and had and apex power intake and an apex n1 catback.
Before the vacuum job the car dynod at
201.4 hsp and 199.2 lbs trq
after the vacuum job
230.5 hsp and 203.1 lbs trq
after intake
238.5 hsp and 215.4 lbs of torque
after the catback
242.6 hsp and 233.9 lbs of torque

 

from the looks of the testing i would say that the parts improve toque greatly while improving horsepower slightly.I would think you feels 30 punds of torque a little more than you would 13 horses.But I could be wrong.I did the calculations and the car would be putting roughly 270 horses at the crank and 250 pounds of torque.Not bad at all.
Ive also read an article about the hyperground wires actually gaining between 7 to 8 horses at the wheels on an fd.Thsi was dyno proven.So that would put the car at like 250 horses at the wheels and 280 at the crank.Not too shabby for wires that cost only a hundred dollars or so.

 

An issue I have with this synopsis:

As above, "The following is from the vendor:" Can you say, "manufacturer bias"? I always prefer unbiased 3rd party testing myself. I'll take those results with a grain of salt.

 

I agree there.Thats like blitz saying yeah our intake gives the car 40 horsepower.You cant believe everything.Only dyno proven results wow me.
I must say that for only two bolt on power adders im quite happy with my investment.I mean I took the car from 255 horses to about 270 and I took the car from 217 pounds of torque to about 250 pounds of torque.
And lets face it.The rotary isnt known for its earth shattering torque figures.I think the next step will be to add some hyperground wires.For more reasons than just horsepower.I want to see if they help with the 3000k hesitation.Mines really bad.So im hoping it helps aleviate the problem as well as adding about 10 horses at the crank.Not too shabby for $110 bucks.

 

I don't blame you for not accepting the manufacturers test with out any other data. In this case, I believe them. I did my own test:

I did a 40-80mph test. The test was done on a 60 degree afternoon. The car was driven in third gear at 35 mph, then floored. I started the timer at 40, and stopped it at 80.

The first test was with a stock airbox, and K&N filter. The average time was 5.49 seconds. I then installed my Cheap Bastard intake mod. That is a stock box with a large hole in the bottom, and a shield to keep warm air out. The average time dropped to 5.27 seconds. Thats a 4% improverment. Since my car has an estimated 300 rwhp, that equates to about a 12hp increase. The K&N in the stock box adds at least another 2-3 hp over the stock filter, so that puts us up to around a 15hp gain over a stock intake.

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