well with everything ive done, i jumped at the chance to dyno. granted it was a wideband 02 dyno, it however was setup as an inertia (like a dynojet) and not a load(mustang)...so..i think my numbers work with my old ones. anyway, found out my car is running rich, with a 12.92 A/F ratio at the peaks listed below..

anyway, here goes:
full exhaust w/mufflers, cutout closed:
166.9 hp @ 4800 rpm
203.9 tq @ 4051 rpm (i raised the tq peak.hrm..)

then i asked them to take the cutout off and run it.
cutout open: (using full piping but eliminated muffler)
170 hp @ 4820 rpm
207 tq @ 3529 rpm (got the lower peak rpm back!)

hrm...guess a cutout, no cat, and 3" catbacks do work on 3.4L cars..or maybe its just cause i have higher flowing heads and headers. o well, whatever, im happy with it for now..just gotta throw a cam in there now and see what that does.. and then port/polish the heads, and see how much hp/tq that adds too im hoping by the time im done of having 250 + hp N/A and 260+ tq N/A but well see



edit - o yea, for all you wondering, if you add back the "losses" (supposedly 15% loss) -- that equates to:
(with the cutout open)
200 hp / 244 tq :-D

(but thats estimated at the crank, i couldnt be certain without putting the motor on an engine dyno)

-R

 

hell yea

 

Not bad at all. I guess the cut-out is proven on all cars, wheather its a v6 or v8. im happy i got one

 

to russell. now for the headwork <coughs>

 

awesome!

too bad we do no thave that humping smiley

 

thanks ppl.

something else i just realized...:

while everyone that has been talking to me and looking at this views it as a performance upgrade, keep in mind that everything i have done is STOCK.

engine data for 3.4 hybrid:

bore: 3.623
stroke: 3.31
pistons: cast aluminum pistons for LA1 3.4L("3400") transverse mounted engine
intake: stock 1996 "3100" - cast aluminum, non-ported, non gasket-matched. (considered more restrictive than the 3400 intake)
injectors: 19#/hr GM injectors (stock on the 3100/3400 engines)

basically all i have done is create a very...restrictive 3400 engine (close to the LA1) -- save the roller cam in the transverse engine...

so with that in mind. imagine what i might be able to get if i actually ported/polished the heads, got the 3400 intake (its the higher flowing one), or gasketmatched anything... im sooo looking forward to doing some performance stuff now heheh

ill keep y'all posted :-p

-R

 

or replaced the 80's "performance" cam

 

A lot of people around my parts are just purchasing v-6 rear wheel drive cars (i.e. mustang and camaro) and replacing the engines with v-8's just to beat the insurance. Engine supports, k member and some suspension stiffining is all that is required...
that would bring up your hp a bit!.....

 

Along with cooling system, driveshaft, dash, transmission, harnesses, etc. etc.

 

Yea but I have more pride in my car as a 3.4L V6 than I ever would if it was a V8. Besides, I havent even STARTED to make my car go fast. I mean, I'm not joking when i say all the parts on my engine are STOCK(except for the headers) -- and I have a list of goodies...:

3400 intake, Camshaft (possible hyd/solid roller), ported/polished heads, bigger TB... and maybe some more. (maybe even a little toss of the juice on there too.. but not too much..just some for fun).

anyway, point being that even tho everyone says a v8 is fun, when my 3.4L v6 is runnin 12's it'll be even better

-R

 

looking at the post indicators, 350+ people have checked this post out. didnt realize so many were interested

-R

 

Your AFR is fine if it was 12.92 across the board. Not to lean and not rich. I like NA cars to be in that area. Now if you plan on running a SC/Turbo setup, fatten it up big time to be safe then take away.

Not bad #'s at all though. Your making more power than my fiance's 99 V6 5 speed. I dynoed it Friday night and it made 166 rwhp@5200 and 191 rwtq @ 3500.

 

wasnt 12.94 across. was 12.94 at peak hp. but when the dyno started it was 11.95, then came up a little to 12.02 and then dipped back down to 11.73 ...

when it hit peak tq it was at 12.72 and then 12.94 at peak hp.

(edit: sorry 12.94 not 12.92).

the guys at the dynoshop told me i was running way rich and that i needed to tune it. of course..i still havent replaced my !Cat (no money rite now to do so.).

so thats probably contributing to it.

-R

 

I have a dyno later this month, i better get my cutout on...