This is my first post here, but some of the colorado 914 folks should know me at least. Brant suggested posting this here as its kinda nifty considering a stock 4 cylinder, and at altitude. This is just a repost from our local 914 group board...


So i took my car down to Mac Autosport in Parker today to get it
dyno'd for the first time since i have owned it. Was pretty
excited, and the results were very good (to me anyway). I was
running a 50 series tire on a 15" rim, and the HP was measured at
the rear wheels.

As far as the car..

1976 914-4 2.0L
K&N Intake
Garretson Headers and Flowmaster Muffler
Stock Ignition, Cam, etc
Running 205/50R15 Victoracers on 15" Rims

Testing was on a Dynojet Research Chassis Dyno
72.26 Degrees F
24.62 in-Hg
9% Humidity
5200 Ft above Sea Level (approx)

Max Power: 95.50 hp
Max Torque: 105.73 ft-lbs

Max Power was right around 5300 RPM
Max Torque was around 4250 RPM

Will try and scan the graphs into the comp later and post, as i
found it fairly interesting. The car was tuned by AJRS in Grand
Junction, and was running a bit rich (between 11 and 12 Air/Fuel,
but Grand Junction is around 4000ft as i recall), but it pulled
strong, and had a very even curve.

I did have my right rear wheel rubbing a bit, as the hold downs for
the car were pulling the body down, and was causing a bit. Looks
like i get to do some more pulling on that fender and a new coat of
paint again. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

Anyway, i am thrilled as can be. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

Grant

cool for adding it.
those are dang good results grant!

brant

(IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

Nice results! How much, and how many pulls.

Ferg.

$60 for 3 pulls. And i was the first 914 they ever had. Lets mess with their heads and all show up to dyno this week. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

Grant

Good to see you on here Grant! Nice job on the dynomometer! (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

Finally dug my scanner out of the bottom of my closet. Quality is pretty nice from what i expected. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) Top curve is Torque, bottom is HP. Lower graph is Air/Fuel. I didnt put the actual numbers in, for the sake of a small picture, and they are in the first post anyhow. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

That's lookin pretty good Grant. I might have to pop $60 to find out if the "Budget 914" has any thing close.

FI still? Those are great numbers to pull from a stock 2.0. Good job! (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

Stock FI.

Nothing too fancy, K&N, and some homemade hoses to run all the oil breather lines to a catch tank. This was from April or so, before i cleaned everything up, and was just installing the K&N.

QUOTE (TROJANMAN @ Nov 1 2005, 03:53 PM)

QUOTE (orcadigital @ Nov 1 2005, 02:39 PM) $60 for 3 pulls.  And i was the first 914 they ever had.  Lets mess with their heads and all show up to dyno this week. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) Grant GROUP BUY!

There's actually another dyno place around 50th and Tennyson (I think). Closer for most of us. I'm going to do this at some point.

Found it. Dyno Pro

Dyno Pro web site

good first post ever Grant!
and belated welcome to the club!

brant

(IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif) Great post Grant. If anyone else of our local group decides to do this, let me know. I only live about 10 min north of the shop.

Excellent Grant, I can't wait for mine to finally get done. Congratz (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

Don't want to rain on anyones parade, but does this make sence? I pulled an old road and track road test from '76, and they show the 2.0 as having 7.6:1 CR, making 84 HP at 4900 rpm, and 97 lb-ft of torque at 4000 rpm, both of which I imagine are stated by the mfg, and while they are not stated, I would again suspect they are at the crank. So just a K&N and header, at 5000 ft, running rich, is making 109 at the crank? (95 x 1.15 for drive line losses)

Again, not trying to be a jerk but want to understand this all. I've never dyno'd my car, but plan to this spring after the winter round of bolt ons. I'll be sure to post the results and mods.

I did do a GTech HP run, which is rather lame compaired to an actual dyno pull. You have to program in the weight of car and driver, which I did after taking the car off my corner balance scales, so I know the weight was right on, no "cheating" there to skew the numbers. With a similar K&N set up, SSI exhaust and a blown out bursch muffler, bolted to a 30k mile Brad Mayeur 2.0 rebuild, (euro p/c's, shaved heads, approx 9.2:1 cr) stock FI, I took 5 runs, tossed the high and low, averaged the middle 3, and got 96 hp at the wheels. NO idea what the mixture was, lean or rich, it was all stock FI.

Adding the 1.15% gives 110 at the crank, which is about what Brad thought it would do with a stock cam.

Just wondering...

What he said.

Kelly

I would imagine the test that netted 84 hp was a '76 with all the smog stuff choking the life out of the thing. I don't see any smog stuff in that pic.

That open element K&N is going to be WAY less restrictive than the stock snorkel, which would help.

I doubt if the header and exhaust would help much, as the stock 2.0 muffler is pretty good, but I don't think this is too out of line really.

Should it really run that rich? I thought the D-jet would compensate for altitude to some degree.

There are many people much more knowledgeable then i, i just posted numbers that were above my expectations.

I was using a baseline of 91HP at the crank, which was a factory number for a 76 2.0L. I am told crank to wheels is ~15%, and the 5000ft altitude gain is another 10 to 15%. That would show around 70ish HP at the rear wheels on a stock 914, stock exchangers and air box. 70 to 109 is pretty drastic % wise, 45% or so (doing ghetto math in my head, so forgive me). Assuming that any of this is correct, or even ballpark, returning to sea level would put me in the 120 range at the crank. I am assuming that you are at or near sea level, but please correct me if i am wrong. I also have stock US pistons, stock head, and stock compression. I have a friend in NM that comes to some of our track events, with shaved heads and higher compression, and his car is crazy fast. Now a big part of it is the driver, but i have ridden with him, and the car pulls just incredible. He hasnt dyno'd as far as i know, but it feels like it is stronger then mine by some noticable amount.

My only thoughts comparing would be discounting the benefits of running at sea level, as well as higher compression. I think the impressive part to me, besides being higher then i expected (i was thinking 80, hoping 85, putting me near 100 at the crank), is that it is basically a stock motor, with the only changes being before the intake and after the exhaust, meaning truely bolt-on horsepower gain.

Maybe someone with more knowledge can respond, as i honestly dont know. I had a baseline number, and approx modifiers both for and against, and in the end, was very pleasantly surprised. I think as 914 owners, we all know horsepower really isnt the end all, or i wouldnt be passing those 911's on the track. Thats why i take no offense to any of this, and to me, its just more info in the pot, for us all to disect and learn something (hopefully) from. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

Grant