Thanx for all the help in selecting guages etc,now I need to know what the "safe" maximums are for the pyro and trans temp and what should I expect for boost?.I havnt run it since the guage installation,because while I had the 21cm turbo off to drill the pyro hole in the manifold I decided to replace it with a 16 cm,so I'm waiting for it.

Ive read on this site (search)

egt-1200*

trans-225*

boost-25lbs

is that about right?

 

You should be able to push towards 50lbs of boost, but, I wouldn't turn the pump up more than a few turns past the lock collar until you get injectors. You'll stress the pump if you don't give it releaf with larger injectors. I don't think the stock ones will let you make use of it turned all the way up anyway, or your stock turbo. You might just turn it up a little at a time until you reach the point where you don't notice much improvement. In the mean time, think about beefing up the tranny, and opening up the exhaust. OK, that's enuff thinking for now, until I get some caffiene. Any graamaktickle errors above are strictly do to lack of that last ingredient which i spoke of................

 

No flame intended here Redleg, but, I'd really doubt that 50 psi is even in the ballpark for redhornet's turbo.
There is no way he'll see that level of boost.
Now to be fair, injectors, pump tuning and a hybrid turbo will get him near that, but even then it's a stretch.
That is not a bad thing... the only boost you really need is enough to burn the fuel charge. The lower the boost you can get away with the better.
On a stock turbo, with stock injectors, pump timing upped a tad, fuel screw set moderately aggressive you should see about 28-32 psi.
This assume's a nice open air intake system, good exhaust system and so forth.

The 1st gen tranny runs hotter than the newer one's due to the lockup function which we don't have.
If you look at the dipstick on the tranny it says to check the oil "at operating temperature"... 180* or 185*F.
The trans has a high temp sensor on it. This sensor is set at 275*F
When temps reach that level, it kicks you out of OD and prevents the upshift to OD until that temp drops.
At that level you are seriously hurting the tranny.
Your operating temps on our A518's is between 180*F and about 225*F under load as noted.

The EGT issue is a bit more involved.... you can run nearly all day long at 1200*F... BUT... if you do this, the next issue becomes keeping an eye on your coolant temps.
While the engine/turbo can deal with this temp the prolonged running at that level can start to cause heat saturation of the head, block, cooling system and intercooler.
When this happens the cooling system becomes over taxed and starts to loose ground. You will see our water temps climbing... at this point you need to drop down and pick up a lower gear to ease the loading on the engine/turbo etc.
This will also cause trans temp increases too.
So you literally need to "manage" your driving/throttle/EGt's/trans temps as you go.

As for a stock turbo, you can run it at or around 28 psi and still be in/around the upper limit of it's efficiency map. As you go above that level the boost will increase of course but the efficiency of the turbo starts to deminish quickly and you soon end up with more heat than the extra boost is worth.

JMO.....

pastor Bob

 

I couldn't be mad at you Bob.
I was leaning more towards the fact that he didn't have a lot to worry about there.......... know what I mean Vern?

 

Heed Bushys words, or you`ll end up causing damage. my 93 is living proof it dont take that much.

 

Bobs right. You will probably see only about 18 PSI boost with just a housing change, mess with the fuel screw and you will be in the 22-24 range. With other mods, your turbo is good for about 28-32. I was getting 37 out of my stock turbo and it was out of its efficiency range. I ended up ruining 1 turbo that way.
Once you start bombing you will be addicted so I know you will get to 30 PSI some day, at that point you will want to consider another turbo.
enjoy.

 

Well thats all great info,and you are all correct in saying that this is addicting.

I was gonna stop after the Guage install,Timing,bumping the pump up 10cc,the 16cm turbo housing,but now I'm gonna look at air cleaners,and then probably exhaust.........

thanx again.