How to gain 22 rwhp from the Fiero intake @ 6000 rpm... (Page 1/3)
lou_dias JUL 05, 03:39 PM


Your mileage may vary...
Here is my setup:
Patrick JUL 05, 11:15 PM

Lou, that's an interesting intake mod. Although what you did is much more involved, it reminds me of the old days where we would modify the divided plenum on V8 intakes to enhance top-end power.
lou_dias JUL 06, 12:31 AM
It was an experiment. I threw caution to the wind and would never do this on the street but the benefits outweighed the drawbacks in this case. Giving up 10 ft*lbs for a larger area under the curve gain from 4600-6000 rpm seems like a big win here.
Dennis LaGrua JUL 06, 12:42 PM

quote
Originally posted by lou_dias:

It was an experiment. I threw caution to the wind and would never do this on the street but the benefits outweighed the drawbacks in this case. Giving up 10 ft*lbs for a larger area under the curve gain from 4600-6000 rpm seems like a big win here.



Impressive results for what you have there. You gained more than 22 HP as a stock 2.8L on a dyno only puts out about 120 RWHP due to drivetrain losses.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

lou_dias JUL 06, 02:23 PM
@Dennis,

My motor is actually making >200hp but my larger diameter and much heavier wheels+tires and clutch spacer (1" thick aluminun disc) drivetrain are making it *look* much lower. I don't put on "dyno wheels" to tune. The 3.4 can make >200 rwhp in a Fiero pretty easily if you don't just do a low-ball "basic swap" that will only get you 135rwhp...

When I was using wheels near stock weight, this motor put down 187 rwhp and 249 ft*lbs on a Mustang dyno. That was using 99 Camaro 16" alloy wheels and 255 series tires that weighed 45lbs each. My current combo weighs 52 lbs each and most of that weight-gain is a the perimeter since they are 1" larger in diameter than stock and much wider (315/35/17).
If you know anything about torque is that it's based on a radius arm and where the force is coming from. Since the force is coming from the axial point - If you shorten the arm, torque goes up...lengthen the arm and it does down. When you force it from the radius, then it's easier to apply force to a wrench, for instance, to loosen a bolt. I think we are talking about 1/2" but that's about 5% off the top already. So just taking that into account, I'm almost at 181rwhp. Perhaps if I decide to skip next year's racing season, I'll go back to street tires and work on fixing the body and maybe hit a dyno then... That's a big if. I love racing.

[This message has been edited by lou_dias (edited 07-06-2019).]

lou_dias JUL 08, 11:12 PM
Disappointing results as I lost part of my exhaust in round 2 which pinched a brake line. Caused me to lose my balance in round 4 when I was coming into turn 4 hot and tapped my brakes... Looked like I would have been able to out accelerate John Feilding's Camaro coming out of turn 4 until then...



You can see my exhaust fly out at around the 12:21 mark...

[This message has been edited by lou_dias (edited 07-08-2019).]

Spadesluck JUL 08, 11:23 PM
You came pretty darn close to kissing that wall as well!
Patrick JUL 08, 11:54 PM

quote
Originally posted by lou_dias:

Disappointing results...



Yeah, that was too bad.

I always enjoy watching these videos. Maybe they should limit the number of Camaros though.

So what's the deal with the 2-stroke EVO?

[This message has been edited by Patrick (edited 07-08-2019).]

lou_dias JUL 09, 06:45 AM

quote
Originally posted by Patrick:
Yeah, that was too bad.

I always enjoy watching these videos. Maybe they should limit the number of Camaros though.

So what's the deal with the 2-stroke EVO?


That car is insane. That motor is almost blowing up but he's been building another one that should do the 1/4 mile in 8 seconds...
BillS JUL 16, 06:01 PM
Very nice results, Lou.
Great to see some dyno evidence instead of the more common "I swear it had 100 bhp more...' we see so often. What is the intake you started with - 3.1 F body?