mrr23

iTrader: (3)

just got through installing these today along with the matching y-pipe with cats. took about 4.5 hours. R&D for Bassani and www.vincihighperformance.com (new sponsor here on the board). might get it on the dyno tomorrow to get the results. then out to OSW for 1/4 mile times.

http://www.stealthram.com/bassaniheadersinstall.html

mikez28

Is there any way you could get some sound clips and post them or email them to me? I have a '98 Z28 with Borla exhaust and would love to hear what it sounds like, and I am sure others would as well. I am trying to decide between MAC, Bassani, QTP, and FLP headers, trying to get a complete kit because I want to run cats. Also, what plate are you running for the Borla? Thanks alot, I appreciate it!

PREDATOR-Z

Those should make good low end torque. I think they would perform well with a 220 or less cam with medium lift. I'm curious as to the results also.

PREDATOR-Z

Any feedback?? update please

mrr23

iTrader: (3)

did some dynoing of the headers. the stock manifolds are pretty good. but they did notice about 5" of vacuum on the TECH II scanner. so they added the air lid and polyfoam filter. then the MAF housing ends.

Bassani headers and y-pipe with cats
http://www.stealthram.com/familypics...saniheader.jpg

added the VHP air lid and polyfoam filter ( vacuum dropped to 1")
http://www.stealthram.com/familypics...dandfilter.jpg

Added the MAF housing ( O2 reading went from 990s to 890s)
http://www.stealthram.com/familypics...mafhousing.jpg

grand total for all parts added vs stock w/ borla
http://www.stealthram.com/familypics/formula/dyno59.jpg

mrr23

iTrader: (3)

i don't have any sound recording devices. but i have a friend that does. let me get with him one day and see what i can do. i run the one down form completely open plate. it's definately louder. not so much in the car. but out back when you get on it. WOW!!!

mrr23

iTrader: (3)

the dyno doesn't show it. but in auto cars you can feel when the car comes alive at 3200. with the headers it now comes in at 2600-2700. also i could feel the drop in power just before the shift at 6k. now it pulls all the way to it.

mrr23

iTrader: (3)

here's some e.t. updates http://www.stealthram.com/99formulatimeslip.html

PREDATOR-Z

20.2 rwhps is darn good for midlength. Thanks for taking the time topost.
I wonder what would Macs do with the same mods?

jimmyblue

iTrader: (11)

So it looks like from the dyno59.jpg that peak torque
dropped 20 lb-ft but peak HP went up? I bet there
is more to be had with tuning. Strange that torque
dropped against stock manifolds & piping, I expect
that tuning it better in the midband might give it
back (probably backpressure mixture / VE effects
on torque from the better tubes, cats, Y?). I
wouldn't leave those MAF ends on an automatic
without fixing the MAF table.

LightweightZ28

iTrader: (2)

The max torque number listed is being effected by the torque spike that his convertor is causing. He actually gained torque all the way across the graph.

OWENMUSTANG

iTrader: (2)

Hey, just a thought. (this is not a flame) on the dyno looks like you picked up
15 HP & 24 ft lbs but, your e.t's look more like 8 hp. what gives??

PREDATOR-Z

Ah, there is proof of the difference between Dyno racing and track racing