Going to my first Dyno tune

hey Erick I got a new coil which made a difference and they changed the jets and needles out twice.

Maybe I can bring it by your place after my finish my next run at JB racing this Friday. I've been meaning to come down to your neck of the woods and see what you got.

 

here is the very first curve (ignore the bee stuck to the screen)

and here is a picture I took of the dyno sheet (the first one)

PS: no bees were harmed at my dyno run, the bee was safely extracted and released back into the wild where he probably went to go sting someone

http://picasaweb.google.com/lh/photo/pQmhHUDhkoHQqTlPs3OcCQ?feat=directlink

http://picasaweb.google.com/lh/photo/GDHxOMdpdJxObCG21xknZQ?feat=directlink

 

Sounds good man...come on by and bring the Maverick.

 

man the power sure falls off quickly on your motor. i would say the vavle springs are shot not allowing the motor to be able to rev up high enoungh. ive dealt and heard alot about jba racing. i know and am civil with jay bittle (the owner). there shop is a high end shop meaning that your paying alot for there location, lease, there, invitory, there employees, and jays race cars. i do think that you did get your moneys worth. they found problems and addressed them. i suspect that your motor would benifit from a new set of valve springs. that will keep the power from falling off so early in the power band.

 

Final results

So I took it back today. I was told on Monday it would be $98 per hour and I would need about 2 more hours of tuning. Today they told me $150 and hour . . . anyway, no biggy, I decided to let them finish what they started.

Here is where we left off on Monday, this is the first reading on the dyno this morning:


At the above graph I had decent air/fuel mixture through most of the curve:


I had 2 mechanics working on the car pretty much the entire time (about 1.2 hours). At the start the timing was 6 degrees and total was 42. I had primary and secondary jets and metering rods replaced at the last dyno on Monday:


He changed to bigger secondaries:


There wasn't much horsepower there and it ran too rich still:


Finally getting somewhere, went to a fatter metering rod:


Next he changed to lighter/softer springs which sit at the base of the metering rods in the edelbrock carb:


Problem here was that I was still running too rich and dropping off fast at the end of the curve, so the other mechanic (don't remember his name but shorter chubbier dude with really thick glasses) really seemed to know what he was talking about and said to adjust the timing. So we advance initial to 12 degrees and disconnected the vacuum because it was going up to 40's total timing:


Not too bad on the above because we finally crossed 150 horsepower. We decided to go to still fatter rods with everything else the same:


He reconnected the vacuum and decided to try and adjust it. So now the only thing different is that the vacuum advance was adjusted and connected back up:


I'm no mechanic but that looked pretty crappy, not to mention the car sounded pretty crappy when he was revving it that high on the dyno. So he decided to increase the initial timing some more. I don't have a graph for that run but here is numbers:


I am finally getting major horespower improvement. Still running rich so they decided to go with fatter rods still. And I wasn't haven't any pinging which is something they were worried about at 21 initial timing. So here is fatter rods:


The numbers didn't really change much after this run. The air/fuel ratio was still a little too low (in the high 11's) but they didn't think they could improve too much on it. Here is the final run:



Thats 181 hp at the wheels and 280 torque. I am VERY happy. Especially with what I started with. The bill came out to $193. So a total of $800 if you calculate my gas and all. $800 for 6 hours of work and some metering rods, springs, jets and a new coil. Horsepower gain of about 41hp. Also, I was getting less than 10 mpg before and I'm sure I'm gonna doing much better now.

 

MUCH BETTER.......CONGRATS. bananaman

 

I believe you are the winner!

 

I was pretty close

 

nice results. glad to hear that they got making more power. hows if feel now when you drive it?

 

great job got any vids of what is does now

 

yea you were, sorry for missing that! :Handshake

 

it drives very well now. Before it would have flat spots where there was not a lot of acceleration but now it feels very steady. I still need to fix that exhaust leak, feel like that's contributing to a little bit of my detonation. I am meeting with your buddy Dave Monday so I hope he'll fix it.