ok so i decided to dyno my old engine with its mods to see what i had before i put the 3.4 in this xmas, my engine is pretty much stock 3.1 with close to 129,000 miles on it. all i have done to the engine is a k&n filter, underdrive crank and alt pulleys, bigger plug wires, pf&e headers into a deadbird exhaust, 5 speed swap and posi, thats about all for performance i know some of that doesnt affect hp and tq but figured i would list anyways.

my first question is how much hp/tq is lots in the drivetrain so i can estimate my engine hp/tq?

anyways to the numbers

first run i ran it up to what i thought was redline, come to find out it was only 5000, damn gm tach and i ended up with 132.4HP and 177.7 TQ

2nd run i ran it up to what i that was like damn near 7000, come to find out it was a little over 5500....grrr, anyways my second run i pulled 133.8HP and 178.9 TQ

not to shabby if i do say so myself, especially outtve a motor that is only rated at 140hp and 160tq...im sure if it had a good tune up id pull a lot more outtve it, i havent replaced anything on it in a long time....cant wait to see what this 3.4 im building puts out, what ya all think

 

I think its time to pick up a $20 tach off Ebay so you know your true RPMs.

 

yeah i plan on getting one now for sure soon as the new engine is in.....well at least i know i havent been over reving it cuz i never take it up to redline, or what i thought was redline

 

are the stock tach really that inacurate?

 

at idle alone mine was like 400 off, at high rpms i guess it just got worse, either way im pleased with the restults...im sure if i had somene stuff replaced on the engine and reshened it up it woudl be running a lot more than what it did....oh well 3.4 here we come haha

 

no the stock ones are not that off. His must just be bad. I have a led tach and it maches my stock on R for R.

 

what kind of duno was that on? your TQ numbers are a lot higher than the dyno has showed mine! you hp numbers are about the same as mine...that doesn't make sense. you ever run your car at the track? if so, what does it run? they say about 10% loss for a manual tranny.

 

I think that the 90-92 Camaro tachs are off about 200 RPMs.
I am having the same problem as Pillsbry10. My tach is
off about 600 RPMs at idle, and gets worse off idle.

I think I am switching back to my V6 tach with the V8
chip, and see what happens. I know that one was a lot
closer than the used V8 one I bought off Ebay.

 

I compared mine to the ECU's readout - mine is about 300rpm behind.

 

I have the dummy gauges so I installed an Equus tach... I like it.

 

AM91Camaro_RS it was a dyno jey dyno...what all do you have done to your engine,im sure ive read about it before but i dont remember. yeah the tq kinda surprised me but we ran it twice and they were pretty much the same, i floored it a little quicker on the second run hence the extra power. maybe i just have a freak engine ....no i havent ran it at the track yet i was gonna this year but im having a transmission mount problem which keeps me from launching. im not sure if our track is even still open ill find out cuz i wanna go run it before i do the motor swap, ill let ya know

so estimated at 10% i would have 146hp and 195 TQ at the flywheel

as far as tachs go i probably just have a crappy one, or the tach on the dyno was way off, but hey at least i know i wasnt hurting anything when i was racing cuz i kept it below what i thought was redline

 

my tach is off too...

pillsbry, i think either you have a freak engine or the pf&e headers really do work better than my old hookers. cause i have headers with fully custom y-pipe to 3" single to a flowmaster, P&P heads and intake, 1.72 int 1.42 ex valves, 10.75:1 compression, BIG cam. i have been on the dyno yet with my new throttle body though. and, i need to get my new intake manifold finished so i can, hopefully, see some big improvements.

 

those are some impressive numbers

 

My tach my be off a little but not noticeable.

stock tach has 12 lines between each number.
My LCD ones has 4.

But at cruise speed 2500-3000 they match up well.

 

AMS youve still got a lot more done to your engine than i do mine i cant imagine the headers are doing that much more. what are your numbers anyways?

 

143hp and 165tq. that was late in the day on a dyno day so i thinkin that they calibration could have been off on the dyno. there had been some pretty powerful cars on it before me. i was rather dissapointed. but, i'm shooting for getting some high 14s N/A this winter! i've pulled a Z06 out of the hole at the dragstrip so i know it has some torque! Hemi Rams are no competition... so, i don't know.

 

That's it? I would think you had upwards of 200 ft/lbs. Must have been the calibration. There's a formula for determining rough HP from et's and trap speeds vs. weight somewhere....

 

yea, i've guessed that hp is really around 210-220 at the crank and those ET and mph formulas support that guess.

 

im gonna check to see if our strip is still open this weekend and try to get at lest one run in so i can give you some numbers.

i cant wait to get the 3.4 done....its gonna be one heck of a sleeper against all the little kids in this town and there hondas

 

yea, if the strip is still open, definately see if you can get some numbers! and, yes, the 3.4 will let you have even more fun against some unexpecting, um,....smaller engined cars.

 

well we are still having good weather down here low 60's upper 50's but i dunno how they stay open....its supposed to be nice this weekend so if i actually get up early enough to go down there ill get some numbers

yeah everyone in this town knows my camaro and knows that its a v6.....and i can even show them whats under the hood with the 3.4 swap and no one will know the diffrence its awesome. maybe make some money back as well

hey can you estimate times with hp and tq? id have to guess the weight on the car though

 

if you are making that much power, you should be running low 15s would be my guess. the weight could make a big difference though.

 

well i do have a fiberglass hood but i also have a system in it so im guessing its pretty close to stock weight.

all we have down here is an 1/8th mile track so im hoping to at least break into the 9's....hope they are still open so i can find out

 

Was that on a Dynojet or a Mustang dyno? Last time on the dyno (Dynojet), Redraif's 3.4 did:

Max Power = 134.1 @ rear wheels (+20%) = 160.92hp @ the fly wheel
Max Torque = 207.4 @ rear wheels (+20%) = 248.88ft-lbs @ the fly wheel

Her HP is way lower than I would expect, but then again its with stock programming and I really think it needs a good valve job and more porting (heads are basically just cleaned up). It really needs better exhaust too. Still, the last time it was on the strip it ran in the mid 16s (the trans was acting up, not wanting to upshift), and spun off the line quite a bit on the Scorchers. I think it would probably run high 15s/low 16s as is with drag radials. BTW how much does your car weigh? The #s seem low to me for your car to do as well in the 1/4 as it does. Redraif's car is pretty heavy, probably heavier than my TA was stock.

 

"Redraif's car is pretty heavy, probably heavier than my TA was stock."

Well that red paint adds up, hehehe

Id think her car would / should run a low 15. You got plenty of mods.

 

those numbers were on a dynojet. i'm not sure what my car weighs exactly. i'm going to go get it weighed sometime, i just haven't done it yet. i worry more about the track numbers than i do dyno numbers anyways. but, yea, i would like to see my hp estimates backed up by a dyno sheet.

 

wow so my car's numbers were

133hp and 178 tq

ams car 3.1

143hp and 165 tq

Redriffs 3.4

134hp and 207 tq

so i guess my numbers really are pretty good considering the mods i have done, i cant wait to get my 3.4 in hopefully itll do much better than the 3.1

i couldnt get any track numbers for you guys as our track closed last weekend grrr, week to late

 

redraif's made 207 tq

you planning any trips to FL? our tracks are still open down here!

 

Actually, if Am91's car weighs around 3350 with him in it (You really need to weigh the car!) he should be ~175hp. I know my car weighs just under 3000lbs, and with my 200 lbs in it, I'm doing ~235hp.

And I have yet to do the new heads/intake and 1.6 roller rockers.

 

haha my bad, guess i cant read late at night, i edited the post.....if i had the money id love to come down to florida for awhile, its to cold to ride my motorcycle down here now(one reason why im sick) oh well guess i wont get any track times with the old motor

 

There is a lot of extra weight in the car; tons of sound deadening, a heavier early disc brake rear, HEAVY wheels, bigger sway bars, extra equipment (wonderbar, strut brace, neon, stereo stuff), plus its pretty low, stiffly sprung (cut-down Eibach Pro Kit, so the rate is more than normal), and completely not set up for drag racing. She weighed it once (before the disc swap) and I want to say it was around 35-3600, and I don't think that was with her in it.
Hopefully by spring we'll have some of the tuning issues corrected, throw on some drag radials and skinnies, yank off the front swaybar, and see what it will do.
Funny though, it has tons of torque (for a V6), yet everyone said my cam selection was too big and would kill all the torque!

 

Not sure, other than our annual trip to the Southern Trans Am Regionals in Ft Walton Beach in late March...unfortunately both of us have a lot less free time than we used to!

 

I have never weight my Camaro, but I would imagine it sits around 3100lbs. By the time i get into it (240lbs) and the wife and daughter (wife is 6' and about 155, duagther is 5'1" and about 105) that puts a total of about 3600 + a full load of fuel at around another 100lbs=3700lbs aprox.

There is a major difference in acceleration in this car between just me and a half tank compared to the family + full tank and we are only talking 300lbs- It fells like about a 1 1/2-2 sec drop in 0-70.
Weight is major in these cars.

I want to also add that I can not even begin to spin the tires in this thing- and barely spin them for a split second in the rain when taking off. But when this car was stock (years ago) with less power and skinny 15" rims tires w/no posi, I could roast the "tire" on this thing fairly easily. I can't believe you guys are having to try and "set this things up for drag racing". They are slow enough that a good set of tires will cure any wheel spin of the line 20 feet.

 

The Scorchers seem fairly soft, but considering the car has 3.73s and a stall they aren't enough, at least not enough to take full advantage of the convertor. The car would drop several tenths just from being able to launch off the convertor.

 

What are Scorchers?

Edit: Nevermind, I found them- BFG's. They are as bad a Radial T/A's, Like an ice skating rink. They are made for "show" if your into colored tires. I would not recommend something like that for any kind of performance value.

 

Why not just get DOT drag tires? Better than those
stupid Scorcher BFG tires! Those ARE just for looks, BTW!
I have driven a car with them on. It feels like the
car is not gripping to the road, especially on turns!

 

what stall convertor does redraif have?

 

I'm well aware these tires are not designed for drag racing, but there were no spare drag tires laying around that day. Plus with the tranny acting up I was not going to press the issue and damage it. As far as the Scorchers being only for show... Well those must have been some worn out tires, or way skinny that you were experimenting on. Cause mine handle as well as Comp TAs and better then most other tires that have been on the car over the years. Have had them on the car since 99. Never had a traction issue as far as handling goes. Grips the courners in a serious way. I live on a curve road and play in the car quite often on the curvies. Even took the car out on a road racing track. It held great even in the rain. Wished it had stayed dry long enough to play on the skid pad. Oh well!

 

That is what I said, if you'll read the post! They ARE on the car JUST FOR LOOKS, BTW! They wouldn't be my first choice, but they do pretty well for 95% of what they are used for (daily driving and shows).

Considering the car is a V6, it grips just fine except from a dead stop.

 

Around 2700 I believe...its been a while.

 

Computer crapped out before I could finish replying to questions yesterday. It is a custom Convertor made by Neal's Racing in Snellville, Ga. He specked it out to the cam and mods done to the car.

 

that's cool. i have a 2200-2400 stall in mine. however, lately, 3,000 hasn't been a problem. i don't know what's changed but something has! one day, i had it up to about 3500 before it started to spin! i can't wait to go back to the track now!!!!

 

Hope you are not having problems with yours...would suck to have the tranny bust. I can't wait to get mine back to the track with some tires that stick and the tranny shifting properly...

Hey I noticed in a tread that you mentioned you had cut open a stock plenum to see what your could do to open up the air flow...I have considered getting mine extrude honed...you think that enough material could be removed based on your observations to make a difference? It's that or build a custom one as you are doing...

Also have you done anything as far as an upgraded fuel pump?

 

yea, i need a new tranny anyways. i'd hate for this one to go but atleast i'm already planning for a new one if this one does go.

i did cut open a plenum, if you want i can send you pics of it and measurements. there is a lot of material there that can be worked with but the opening of the ports by the plenum is actually smaller than it is where the top bolts to the middle. that's backwards for a good taper...velocity. i'm sure that you could make a difference but i just decided that it would probably be a little more feesable to just build a new one.

no, my entire fuel system is stock.

 

pics and measurements would be a blessing...

Here's my email address

redraif@yahoo.com

Thanks!

The reason I mentioned the fuel pump was its something we are debating about on mine right now. Esp since I went to the 3.4...I mean if you think about it you would upgrade a 305's fuel pump if you went to a 350...plus with it being modified... Wondering with your 6s numbers if it was an upgrade you did or were considering. Had not heard of many people doing a pump upgrade. LT1Guy did one on his stock 95 and notice it gave him a better track time.

 

I have an A/C Delco '89 Vette fuelpump in mine currently. It is a much better unit with all metal intenals, not plastic inerts like our stock fuel pumps have.

 

I went to a 91 camaro 350 pump in mine.

I couldnt remember the year vette to get one from, so I stayed camaro and went 350.

 

Dale & vsixtoy... what is the flow rate on pumps? What kind of gain did you get? I think we are going with a mustang fuel pump. Much easier to get flow rates and a good variety of sizes to choose from. I know GM and Ford measure differently as well. I think Ford is Liters per hour? Not sure!

 

No clue what mine flows. If I gained anything, I really didnt notice it as I was trying to find a problem in the car, not performance. Pump was not it, so I went to next issue.

BTW, nice to see you back on boards LT1 and Redraif

 

quick question....im sure most of you have read the mods im doing to my 3.4 is my stock pump gonna be ok for awhile?