Detonation when turbo'ing an N/A

[Distortion 5.0]

Is it that likely to happen? Was doing an old post search and came across startling photos. How low should I start out my boost during the tuning phase, and whats the top end you would run? I don't want any smashed pistons.

 

[Red_LX]

It's been universally accepted that you don't want to run over about 7 psi on an n/a, or else you're looking at possible burned pistons.

 

[Distortion 5.0]

That's a Rodger. Now, how does one go about knowing your boost level? I assume it involves adjusting the wastegate stop screw? (if so equiped)

 

[bhuff30]

Yikes.

Your pistons are strong enough, however if you let it detonate, you will break rings, or ring lands on the piston unless you really do it right and destroy a piston.

The max boost allowed really depends on your tune. What are the AFs and how much timing. There is no set forumla for figuring this out, and with an NA engine, you may only get one chance before hurting something with a bad tune.

I ran a turbo computer with the associated injectors and VAM. I started at 9psi, and it worked out great. The min boost is set by your wastegate and a stock TF wastegate is for about 9psi. You just hook up the wastegate to a boost reference and it will boost to there. If you were too add a boost controller, this would allow higher boost levels.
I later ran about 15psi sucessfully. Then, a vacume hose popped off the FPR, causing it to go lean up an onramp. I broke the rings in one cylinder.

 

[Distortion 5.0]

Yikes.

Your pistons are strong enough, however if you let it detonate, you will break rings, or ring lands on the piston unless you really do it right and destroy a piston.

The max boost allowed really depends on your tune. What are the AFs and how much timing. There is no set forumla for figuring this out, and with an NA engine, you may only get one chance before hurting something with a bad tune.

I ran a turbo computer with the associated injectors and VAM. I started at 9psi, and it worked out great. The min boost is set by your wastegate and a stock TF wastegate is for about 9psi. You just hook up the wastegate to a boost reference and it will boost to there. If you were too add a boost controller, this would allow higher boost levels.
I later ran about 15psi sucessfully. Then, a vacume hose popped off the FPR, causing it to go lean up an onramp. I broke the rings in one cylinder.

DAMN. So if my fuel trim goes lean, thats instant detonation? So if a vaccuum hose pops off my car, (which happens a lot really), my engine could just blow from that? That's sucks ass. I might just run like 4 pounds for a good long time. It will still be better than the electric blower I engineered. It delivered like a two percent improvement which seemed to mainly just smooth out the idle, and cool down combustion chamber temps.
That almost makes me want to hook up and emergancy blow valve to the wastegate, controlled by the o2 sensor. I will definately get an air/fuel monitor before I try to crank it (at first with the pipeing completely disconnected)

 

[Distortion 5.0]

***damnit, a year away and I'm a newb again***

 

[Distortion 5.0]

I ran a turbo computer with the associated injectors and VAM.

The thing that sucks here is that I JUST bought four brand new 93 stock injectors last week before the big poof. My only other option would be to use the ones from the T-bird. Is that a definate must, or can I get around it with lower boost setting for now?

 

[Stinger]

You need to start over from the beginning...figure out how you are going to control timing retard under boost, supply sufficient fuel under boost (it's more complicated than just injector size), and many other things...otherwise it will have an immediate ugly death.

 

[Distortion 5.0]

You need to start over from the beginning...figure out how you are going to control timing retard under boost, supply sufficient fuel under boost (it's more complicated than just injector size), and many other things...otherwise it will have an immediate ugly death.

I'm using the entire wiring harness from the t-bird. Every single wire will be from the t-bird. Shouldn't all that other stuff work the same as it did in the t-bird? Also gonna use the distributor and all components electrical.

 

[Stinger]

Any reason you are choosing the "reinvent the wheel" when it comes to how to do the turbo swap?

 

[Distortion 5.0]

Any reason you are choosing the "reinvent the wheel" when it comes to how to do the turbo swap?

I've actually decided that I don't want to mess with this. I have a limited amount of money, and a strong feeling that this sounds like a money pit. I found a nice 91 5.0 powered t-bird at a lot near here, and they're gonna take care of me on it. 2,495, It's got sunroof, power seats, the works. Though I think the sunroof may have been siliconed shut. It runs awesome, and ultra smooth. But no where near the power my 89 gt pumped. I guess due to wieght difference/ possible mods done to the engine before I got it. (It had cobra R styled wing and hood scoop, so maybe). But runs super cool too, and that was a big problem for me in the gt. So I think it's the better deal considering I make delieveries for a job and need to be on the road like yesterday and out of my grandmothers taurus. I know gas mileage is gonna suck, but delivery times should go down.