A customer wanted me to install this on his 91 vin e tbi 5.0. Well, i dont see how this thing adds power because it connects to the tps and the map sensors, and thats it. the car did not feel any faster with it, and not any faster than my 89 formy vin e with the timing set to 14 deg advanced.

anyway, i thought i would post the results so anyone looking to do this would have an answer to the question, does it work.

thanks

What is a venom 400? 14° base is way too much timing. Are you sure you set that with the EST unplugged. IIRC that is even off the timing tab.

http://www.streetstyler.com/Venom400.htm


here is the link to what it is. I dont think the tab is off on my car, i have a matco digital timing light so its not off. I adjusted the timing up 1 deg at a time till i hit knock, then i backed it off till the knock was gone. it ended up being right around 14. And yes, the tan plug was unpluged.

thanks

The computer will pull timing way before you ever hear knock. You just advanced it so far the ECM couldn't pull enough timing, or you got into knock so fast the ECM couldn't react to it. I strongly suggest you set it back to something more reasonable before you break something.

i was using my snap on 2500 scan tool while doing this. regardless, i would not reccomend installing the venom as i did not see improvement on the customers car.

thanks

Sounds like the same sort of voodoo you would get here.

Not worth it.

Yeah I would assume those things would not work.

And just so you know at 14* base timing you are essentially running 45* of timing at cruising speeds. Motor may not last too long there, more timing is not always good, it may make it snappy on the throttle response but in the end effect your car would probably be faster at about 4* base timing.

Maybe even faster at 0*. My current engine has 26* of timing at 2,800 rpm after all the adders, etc. I get 26* @ WOT and about 37 at cruise. Works great and have all kinds of power. More timing just reduces power. Swirl ports are fast-burning heads. Generally they like no more than 30* of timing.

Stock knock sensors can only detect knock in a certain frequency range (hence the reason for different sensors for 305's and 350's). So what may have looked like a trivial couple of knocks down low might have been where your engine traveled through the knock sensors audible range and into heavy detonation. You could also have a bad knock sensor that isn't picking up the knock.

My experience with an LO3 shows max SOP power around 28-31 deg total timing. This was in a camaro, which is probably why Fast355's need slightly less in his heavy van. Anything more than 31 deg produced knock whith more than one person in the car or pulling a hill at WOT.

After reading about the venom, it just makes the TPS and MAP sensor read higher than it actually is, which will basically advance timing and richen the mixture at part throttle and do nothing for full throttle performance.

Trust me, Brian is much more than those "advance your timing" off the shelf chips. Tell him what you want and he will burn it for you.

Please tell me you were just kidding.. right?

You just haven't seen what a car can do when it is properly tuned.

And after many many runs down the drag strip, and testing via the MPH feature with a tazzo. I found stock TBI's like 4* initial advance. at 4*, you get the best trap speeds.

Good point there. Plus I typically run a shim style gasket which raises the compression slightly, but gives me better quench.

Brian dials in WAY TOO MUCH timing and generally floods the engine with fuel. Nothing in common with a properly dialed in chip. Every engine is different.

I will change my timing down when i get some time. It does not seem to ping or detonante thoe. I dont plan on driving the formy much longer as my T/A project is almost complete, but i will post results if i have nothing to do and tinker with it a little. I also cut the cat off and have strait pipes on the formy, and that made the biggest improvment imo. The car is a load of crap, a 200 dollar beater that has been my driver for a couple years while i finish one of my other projects to drive. You can see in the pic that it is a peice of crap with all that back end damage, but hey, its better then driving my 86 toyota van lol

thanks
anthony

I'm running 6* advance and I don't think I would want to go anymore than that.

$299 couldve bought that guy alot of stuff to do the job proper.

One thing ive found about timing is that too much timing equates to power loss and LOTS of heat into the pistons, CC, and reduced fuel economy from all the pumping losses. The idea is to have the right ammount, not more. You may pass the point of peak power before the engine starts knocking.

Oh well, as far as the venom unit goes its not my money so I could care less, but it sure is a waste on something that just feeds the computer skewed inputs.

Looks better then my car At least the paint is still reflective and it appears to have an interior.

lol, im sure yours is still in better shape than this one, both rear quarters have damge like that, the rear hangs about 3 inches closer to the ground.

Sounds like my old cutless that got rear ended. Didnt stop me from driving it.