Swain Tech is GOOD stuff....

[lord_verminaard]

Driving to work the other day, on the highway at 70 MPH trying to lead a train of tailgaters past a Semi going 62 MPH, a boost hose popped, and in order to keep from getting run over and no place to pull over, had to floor it to get around the truck and get over in the right lane to let the hotheads go past me.  EGT's rapped up to 1400 F almost instantly when the hose popped, and I had to sustain it with a floored pedal for about 8 more seconds before I could lift- when looking at the EGT gauge it was pegged past 1450 F mark.   

Remember, this car was a N/A block with no oil squirters, but I did get the pistons Swain Tech coated.  Drove it about 3 more miles to the next exit (just sustaining 65 mph kept the EGT's at 1250 or so) and reconnected the boost hose.

Nothing blew up!  Had me sweating a minute but from now on I am going to swear by Swain Tech, for the relatively low cost to have it done, it is good engine insurance I'd say.

Brendan

[R.O.R-2.0]

this should be a requirement for any na -> TD conversion imho..

[rabbitman]

So a TD with a popped boost hose runs way higher egt's than just a NA I guess.......

[nathan_b]

I think it's more that hardly anyone with a na has an egt gauge.

[R.O.R-2.0]

So a TD with a popped boost hose runs way higher egt's than just a NA I guess.......

well, take a n/a intake and a TD intake, witch one is more restrictive when its under vacuum?

and put on top of that, its sucking thru small charge piping.. a TD isnt getting nearly enough air when its got no boost.

when i blow a boost connection, my car loses all power, and POURS a cloud of blackness.. im sure my EGTs probably go up there towards 1500* when that happens. god i wish i had a pyro..

and generally, people dont turn their n/a pumps up high enough to even hit 1250* on a n/a..

[VW Smokr]

I think it's more that hardly anyone with a na has an egt gauge.

From one who does... with n.a. and fuel screw turned in just a bit, the EGTs do rise rapidly IMHO. Haven't had the cojones to find out how high, but under load, 1300º F comes up real fast. (Yes... the new engine will have coated pistons, squirters, turbo & intercooler.)

While coating applicators like SwainTech do a wider range of coating jobs, some DIY coating products are available from TechLine  http://www.techlinecoatings.com/hi-performance/index.html


J.R.
SoCal

[truckinwagen]

surprised your turbo didn't overspeed and go bang pulling hard like that with no intake plumbed up to it...

-Owen

[R.O.R-2.0]

surprised your turbo didn't overspeed and go bang pulling hard like that with no intake plumbed up to it...

-Owen

mine doesnt overspeed too much when the boost lines pop off..

it used to scream almost like a supercharger, on the 1.5 i had with horribly retarded timing, and made ~40 psi.. now that was some serious overspeed!

[RabbitJockey]

i gave some guy a bov and bov clamp once, he had been driving it with no bov just an open hole for 2-3 days and then drove 30 minutes across town to pick the stuff up, i was nice and gave it to him for free if he let me drive his car, it was a k24 with k26 cold side and governor mod with a fmic, it went along quite nicely

[rabbitman]

I have a NA with a pyro. I can hit 1200F pretty easy with just a little bit of smoke, if I turned it up more I'm sure it would go lots higher.

I ran NA with a TD intake for a while and putting the NA intake back on made a very small difference.

I also ran an aircraft vacuum gauge with the TD intake to see if it was restrictive and it lost maaaaybe an inch of mercury on a long pull.

[truckinwagen]

my isuzu will hit 1200 without too much smoke when NA, can go much higher if I make it blow smoke.

-Owen

[R.O.R-2.0]

I have a NA with a pyro. I can hit 1200F pretty easy with just a little bit of smoke, if I turned it up more I'm sure it would go lots higher.

I ran NA with a TD intake for a while and putting the NA intake back on made a very small difference.

I also ran an aircraft vacuum gauge with the TD intake to see if it was restrictive and it lost maaaaybe an inch of mercury on a long pull.

hook up boost tubing to it, theres where the restriction comes into play.

when you pop the boost piping off the turbo, and your engine has to suck air thru an intercooler, and 6 feet of piping, then i imagine theres more than 1" vacuum..

i imagine it wouldnt be bad if you just had an air filter hooked up to the TD intake..

[lord_verminaard]

That and you are trying to force the exhaust out of the turbo restriction as well.  And I do still have an N/A pump, so no aneroid, so I have the fuel cranked up a lot just to make any power under boost and if there is no boost, I still have all of that fuel.

I actually was more worried about the turbo overspooling, thankfully I don't think I have enough fuel to spin it too awfully fast....

Brendan

[R.O.R-2.0]

That and you are trying to force the exhaust out of the turbo restriction as well.  And I do still have an N/A pump, so no aneroid, so I have the fuel cranked up a lot just to make any power under boost and if there is no boost, I still have all of that fuel.

I actually was more worried about the turbo overspooling, thankfully I don't think I have enough fuel to spin it too awfully fast....

Brendan

same basic setup as i have then. yea, boost disappears, the fuel doesnt = instant smoke screen and no power

you got the restriction from the turbo, and the restricted intake, along with WAY TOO MUCH FUEL.. andthat doesnt make for nice cool EGTs, thats for sure..

i imagine i got more fuel screw than you tho, i bet i could do some damage if i popped a boost pipe and had to drive very far that way. i usually keep a screw driver in my car tho, because it blows boost pipes at the most random times.. last time it blew a coupler, it was under enough boost that the section of pipe that came disconnected, hit the firewall, chipped the paint on the pipe and wall, and dented the firewall. LOL

[lord_verminaard]

Bumping this back up.  Did a 2600 mile road trip in the Golf to South Dakota and back.  Fought some of the harshest winds I have ever driven in on the way home!  Speed limit in SD on the highway is 75, it was all I could do to keep the car at 70 and even then it was uncomfortable....

Sustained 1450 F EGT, with it going to 1550 F up hills,
10+ PSI constantly, Oil temps at 110 C.

Kept this up for about 450 miles!!!!   

Had no choice, going slower in 5th would drop RPM's low enough that I could not get any boost and EGT's would soar, trying to go faster than 70-ish MPH would bring boost up to 12 PSI which would lead to popped boost hoses (a constant issue throughout the whole trip) or drop to 50 MPH and run in 4th.  Seeing as I had 1300 miles to go, didn't feel like doing that....

Only burned (or lost out of the open valve cover vent!) 1/4 quart of oil for the whole trip, car is just fine otherwise.  Tough little engines!  I REALLY need to re-do my boost pipe and add an intercooler.  I probably would have been golden if I had an intercooler on the trip.


Brendan