over boosting?

[turbotyphoon69]

I took the exhaust completely off, running open exhaust(no muffler or CAT) and i think i am over boosting because my boost gauge goes ALOT higher than it has ever gone before. SO my question is, is this kick back/ hesitation "overboosting" when im at WOT, and is and external waste gate the problem?

 

[dgoodhue]

Re: over boosting?

You need an aftermarket boost guage before you touch anything to do with modifying the engine especially anything that affects boost.

 

[SY2932]

I would recommend you to NOT drive your truck in that condition. Your motor is bomb waiting for a place to go off big.

 

[Stangbeater]

I would check the compression in the engine. Might already be to late. A boost gauge and Datamaster would be a great help. Also there are plenty of people in CO thet would be willing to help. plus id\f it is over boosting at high elevation, it will not like it at all at lower elevations. I would also do a bunch of reading on here any other sites, before you have to post the question. Who should I have build my Ty engine?

 

[SYO237]

I run my Syclone with absolutely no exhaust. It runs from the DP to a straight pipe that ends under the middle of the cab. Im running with the PTE52 wastegate to control boost... solid 19psi at the moment.

HOWEVER, my truck has been modified and set up to run like this.


If you are at WOT and you are feeling the truck cut off and surge, you are hitting the boost limit and overboosting. Not good.

But you need to give some more information about your truck before we can fully diagnose the overboost problem:



What turbo are you running?

What external gate are you running and how are you adjusting boost?

What chip are you running?

Fuel / Ignition mods?

 

[turbotyphoon69]

I am running a stock turbo, and 50lbs of fuel pressure(which it think is wrong)

Im on the stock chip

Stock waste gate!?!

stock ignition with conrad cap and rotor, MSD wires and plugs done a year and a half ago(7000mi),afpr

 

[Stangbeater]

I am running a stock turbo, and 50lbs of fuel pressure(which it think is wrong)

Im on the stock chip

Stock waste gate!?!

stock ignition with conrad cap and rotor, MSD wires and plugs done a year and a half ago(7000mi),afpr

Wires and plugs done year. That is some what below average. You should change them more often than that.

 

[turbotyphoon69]

i had planned on doing the ignition again in a week or so, or "spring cleaning" and i am waiting on a Vac kit from Ian, but besides that i think the motor doesnt seem hurt, and the over boost only kicks in when i punch it from a low speed or stop.

So basically my question is IF the motor is not hurt :-? , which i doubt it is... what do i do? different Waste gate?

 

[SeattleSy#1255]

if the WG is stock i'd bet that is the problem right there. Ask stangbeater...he saw what it did to me at the track running a 14.0 LOL took a second off my best time and i was cutting 2.0's 60's...i couldn't build any boost then it would shoot up and down all the way down the track...from a roll, i'd have overboost problems as well. Stock WG is known to get sticky and not function properly...made my TC not perform up to par either...problem solved with PTE setup now, but i was going to go with an external and boost valve.

 

[turbotyphoon69]

ok, that helps alot, but what is prefered the 20g with the WG or pt51-52set up. And i have a 2800stall tc.

 

[InvisiBill]

The 20G is the same turbo, but with a different turbine and/or housing (I don't know for sure). It still has the same crappy wastegate (unless you have work done to it). You'll experience the exact same thing, maybe even worse due to it being an upgraded turbo.

You either need to put a more restrictive exhaust on, which keeps the turbo from spinning up too fast, so the crappy wastegate can do a better job controlling it. Or you need to get an adequate wastegate, whether that's via a PTE setup or an external or something else.

Your third choice is blowing the engine with too much boost.

 

[SeattleSy#1255]

all depends on money...

pte more money more power

external gate, cheapter but good reliable mod, but not a power mod but i guess you could call better boost control power.

 

[SYO237]

Before I had the PTE52, i ran open exhaust on the stock turbo with a Innovative External Progate mounted on the exhaust crossover. Note, I was running a custom T115 Single program chip as well.

I was able to make adequate boost by using a manual valve to adjust -/+, but had a problem with bleeding off boost at WOT, I never did resolve that problem before I got the 52 on there. Id easily hit 19psi then watched it slowly bleed off until about 16psi through the traps.


Of course, with the external gate on my truck, I adjusted the stock wastegate rod all the way shut and then used heavy wire to tightly bound it so it wouldnt crack open under boost. This method worked for me, since I knew I was getting a bigger turbo and didnt want to weld on my stock WG and turbo.

This may have been the problem of the boost bleedoff I had under WOT....the puck was probably able stretch the wire and crack open just enough to kill boost, I assume.


Ian (SyTyArchives) is currently running the same Progate I had with his 20G. The stock WG puck has been welded shut. He is also running a single program T115 chip and has solid boost lines for whatever he wants to program into his Blitz SBC ID controller. He also runs no exhaust except for a Saudi Res (basically a high flow straight pipe disguised as a catalytic converter for those who havent seen one) bolted into the DP.

 

[ghettosled]

the easiest solution if you want to keep the stock turbo is to isntall an external wastegate on the crossover and run a stand alone boost controller. If you are looking for more power and better boost control, we now offer a 100% bolt on garrett turbo upgradw with the factory downpipe. It encorporates a larger 35mm internal wg and heavy duty wastegate actuator.

I took some pics this evening of the setup, which i will post friday.

If you are looking for a complete kit with downpipe and everything then you have the PTE kit with internal wastegate or the RPM with external.

 

[turbotyphoon69]

would it be cheaper to go with the 20g? The Pte kit looks great but its a bit pricey, i dont mind spending the money if i HAVE to but id rather find a cheaper set up with a bigger turbo(20g?) to go in the 12s.

 

[SeattleSy#1255]

if you don't have your tranny done or a higher stall TC, i wouldn't go the PTE route...you'll have to much lag and your tranny is only a bigger time bomb with more power if not upgraded in some sort of fashion.

20g i suppose, but RPM is offering some new bolt on turbo options...may want to check them out.

 

[turbotyphoon69]

my tranny is stronger than stock, not as strong as a waller tranny or something of that sort. But it can handle some power, and i already have a 20g in a stock housing so i wanted to use that. I am going to look into the rpm kits also.


thanks for the hlep guys! :lol: