My project: 10's on a 50 trim and stock bottom end.

[1992awdlaser]

As the title says my goal for this car is to run 10's with the 50 trim while keeping the stock bottom end. I am going to try and do it on just boost. But I have a bottle waiting to go on the car and will put it on if need be to reach my goal. Once I reach that goal or the bottom end goes(whichever comes first) I am going to build the block and will add pictures from that to this thread also. I will be updating this thread as I do things to the car. Expect this thread to last a few months at least.

My ultimate goal for the car after I build the bottom end is to run low 10's on boost with a different turbo. Then I will add the bottle with a 75 shot and try to break 9's.

All comments or questions are welcomed.

Nothing special to look at.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

And the reason I am looking for a shell to swap everything into.

You must be logged in to view this image or video.

 

[banishedmunk]

good thing boost leak tests are free then

 

[1992awdlaser]

I already know where it's leaking. At the htrottle body elbow that came with my buschur fmic kit. It's from tightening the t-bolt clamp too much and crushing the aluminum throttle body elbow. I am going to try some rtv first since a 2G elbow won't fit with the piping.

 

[pneumo]

I already know where it's leaking. At the htrottle body elbow that came with my buschur fmic kit. It's from tightening the t-bolt clamp too much and crushing the aluminum throttle body elbow. I am going to try some rtv first since a 2G elbow won't fit with the piping.

That's exactly why I removed all T-bolt clamps and went back to heavy duty worm screw clamps.

 

[1992awdlaser]

I started to tune the car today but didn't get too far because it still has a boost leak.

I launched it for the first time though and it launches pretty good with the agx/gc combo. But when I shift into second real fast the clutch start slipping so I have to let off and get back on it.


I plan on bringing it to the track on Thursday if everything goes as planned. If I can, I will have videos up.

 

[1992awdlaser]

Forgot to mention. I looked at the datalog and my map sensor is reading up to 24psi. The spring I have in the wastegate equal either 14 or 15psi. I guess it is because it is off the number one runner and it's not bypassing enough exhaust? I know it shouldn't be going up there though.


Or the AEM 5 bar readings are off for some reason.

I wish I looked at my boost gauge while I was doing this or had my friend look at it.

 

[govproperty]

I plan on bringing it to the track on Thursday if everything goes as planned. If I can, I will have videos up.

Which track are you going to? Costal Plains in J-ville?

 

[1992awdlaser]

Which track are you going to? Costal Plains in J-ville?

I would like to. But my friend that is towing me wants to go to Dunn Benson. I'm not going to say no when he is towing it for free. That's also if they are open. If they are not, I will probably be going somewhere else as soon after that as possible. It doesn't say they are closed on the site though.

Welcome to Top Dawg Country

 

[1992awdlaser]

After looking at the datalog, I am pretty sure I am boost creeping to 24psi. I say that because it takes over three second for it to go from 16psi(wastegate pressure) to 24psi.

Now I just need to figure out why. I have never heard of, nor do I think a 50 trim should be boost creeping, especially with an external wastegate.

I plan on running over 25psi anyway. But I want to figure this out still. I know when I put a boost controller on it the boost will come on faster also.




Edit: I went out to check over things. I remembered the alternator belt started making noise when I was at full throttle, so I checked that. THE BELT FLIPPED OVER SOMEHOW. The flat part that would be going away from the pulleys is now against the pulleys. The pulleys cut grooves into it to so it fits correctly now also. I don't know how that happened.

 

[JusMX141]

Weird that you would get creep with that setup. I know the 1-runner external gates aren't as good at controlling boost as the ones that pull from the collector, but pretty much all of my friends are using a similar manifold setup running boost in the 20's with no creep at all from a 38mm gate.

I'm hoping your turbo gets you to your goal and can hold up to the higher boost levels. The newest G50's are made by Kinetic, and they don't have a great reputation for reliability. The earliest generation of G50's were actual Garrett turbos modified to fit into bolt-on Mitsu turbine housings. The next generation were made by Turbonetics, and now Kinetic. I wonder what has prompted SBR to change manufacturers so much over the years?

 

[1992awdlaser]

I'm kind of dumbfounded by why it is creeping also.

My G-50 has a Turbonetics chra.

 

[eviltsi]

What happened man????? Thought you were coming out here?

The creep is wierd, my internal g50 never creeped on me....

Goodluck and give it hell!


-cory

 

[blcknspo0ln]

I wonder what has prompted SBR to change manufacturers so much over the years?

Money, I'd imagine.

Pat,
You're not the only one with boost issues with an external gate. I run a dual green spring in my 38mm (~21psi) and I still can't 'hold' over 28psi. It's very annoying and I don't know why either.

 

[JusMX141]

My G-50 has a Turbonetics chra.

Is that a good or a bad thing?


Best of luck to you, I'll definitely be checking the results.

 

[eviltsi]

It's better than a kinetic........ every single kinetic g50 that is in my area has blown in less than 500 miles.

-cory

 

[JusMX141]

Money, I'd imagine.

I'm sure that's the case.....but I'd rather pay a little more for a turbo with proven reliability than get a bargain price on something with questionable reliability. That's what eBay's for!

 

[1992awdlaser]

What happened man????? Thought you were coming out here?

The creep is wierd, my internal g50 never creeped on me....

Goodluck and give it hell!


-cory

Tom is right about money being part of it. Place to stay was the other since my dad retired and decided to take a long vacation in Florida. I will be there when it starts to get warmer again though. I have a few places to stay now and my friend is going to pay for the gas to go there and tow my car just because he wants to see some fast cars.

Pat,
You're not the only one with boost issues with an external gate. I run a dual green spring in my 38mm (~21psi) and I still can't 'hold' over 28psi. It's very annoying and I don't know why either.

Yeah, I don't get it. I will figure it out though. Yours is an easy fix, don't give the wastegate a pressure source.

 

[andy4g63]

Where do you feed the turbo from???
What Boost cotroller do you have?

Try feed the turbo from the head, if you are not doing it right now, second I don't know, what kind of BC you have , but in case it is manual, try to do a stiffer spring/ I did that on mine and MUCH BETTER boost response, no other changes. Get a second WG spring little bellow your desired boost level, so you could control it with BC but just for a few/2-3/PSI.

I've been doing a lot of dicking with the WG springs and MBC spring and my observations are:

-With a single spring my WG/external Tial-44mm/ was like partially open before the preset Boost level - like 3PSI
-With dual WG springs it got better, almost to the desired level
-Changing my MBC spring to a stiffer one and with ceramic ball, I have it almost perfect. I have Hallman MBC, BTW.
I have T3, 0.70 AR HX-40 and I am getting positive pressure little over 3000RPM, at 3500 rpm I already have 5-6PSI and keep going from there, really fast. So this is just my opinion, hope it helps...

 

[1992awdlaser]

Where do you feed the turbo from???
What Boost cotroller do you have?

Try feed the turbo from the head, if you are not doing it right now, second I don't know, what kind of BC you have , but in case it is manual, try to do a stiffer spring/ I did that on mine and MUCH BETTER boost response, no other changes. Get a second WG spring little bellow your desired boost level, so you could control it with BC but just for a few/2-3/PSI.

I've been doing a lot of dicking with the WG springs and MBC spring and my observations are:

-With a single spring my WG/external Tial-44mm/ was like partially open before the preset Boost level - like 3PSI
-With dual WG springs it got better, almost to the desired level
-Changing my MBC spring to a stiffer one and with ceramic ball, I have it almost perfect. I have Hallman MBC, BTW.
I have T3, 0.70 AR HX-40 and I am getting positive pressure little over 3000RPM, at 3500 rpm I already have 5-6PSI and keep going from there, really fast. So this is just my opinion, hope it helps...

Oil is coming from the filter housing.

I don't have a boost controller on it yet. I was going to tune wastegate pressure(14-16psi) first. Then I was going to install the boost controller and tune around 25psi or so. When I put the boost controller on the higher boost will definitely come on faster. Right now I get the spring pressure of 16psi at around 3,700rpm.

The wastegate already has two springs in it.

 

[selmerguy]

You could try removing your springs and see if you build boost. If you are overrunning the wastegate you should still spike to that pressure with no springs. Or try one spring. Just to see if you can get consistant boost.

 

[1992awdlaser]

I already took one spring out to see what happens. I am going to drive it again when I fix the boost leak.

 

[selmerguy]

Yeah I figured a wiseman would do that. Good luck with your car.

Sam

 

[mach4g63t]

My G-50 has a Turbonetics chra.

How can you tell? I'd like to know who my G60 was made by, but it's 800 miles and going strong.

 

[1992awdlaser]

How can you tell? I'd like to know who my G60 was made by, but it's 800 miles and going strong.

It has the signature Turbonetics T on it.

You must be logged in to view this image or video.

 

[JusMX141]

Yeah I have a G50 here that's made by Turbonetics- it has the big-shaft turbine. Looks like a hell of a well-built unit, something just ate the fins off the turbine and the compressor wheel has some damage as well so I've been using it for parts.

I also have one of the very first G50's that is acutally a Garrett turbo with "G50" ground into the green Garrett-Honeywell tag, and the whole deal is bolted into a very early type of bolt-on DSM turbine housing.

The last two Kinetic G50/G60's that came through my shop got thrown in the scrap pile as they were damaged beyond repair. I swear Kinetic is a half step above the Chinese eBay turbos.

 

[1992awdlaser]

I fixed the boost leak at the throttle body elbow. The shaft seals seam to be leaking some though. I am going to log a pull and see how much they are leaking, if not much I will tune around it. If they are leaking a good amount, I have my hands full to get ready for the track because I have some other things to do also.

I didn't mention before, if the track is open, I am only going to be looking for anything in the 11's. Not looking for 10's yet. My friends mustang rims will probably slow me down a few tenths.



Edit: Took it for a ride. I am gonna have to replace the shaft seals. I could probably tune around it. But, they are leaking enough to where I don't want to tune around it.