I did my own twin turbo kit, i used gt35r's with S covers. I mounted them behind the front wheels as many people do. The car is a 99GTS, i used the aem system for management. Used 850cc side feed injectors, I modified the stock headers and ran V-bands off them to connect to the turbos. I custom made the front mount, in two side to side cores. Everything came out great, except .. .
for the turbos i used a scavenge pump ( scavengepump.com ) I didnt use a scavenge tank ( do i need one ? ) The feeds are stepped down to a .041 , and the outlets are t'd and go directly into the oil pan. The problem is , when i start the car i get smoke for about 10 minutes and then clears up, i pull the turbo filters and see oil. I put one way check valves out of the bottom of the turbos but that didnt work, so i took them out.
I spoke with jason heffner, he told me to just gravity feed them to the pan, and not use a pump. i dont know if the turbos are higher then the oil level. Any input from anyone would be greatly appreciated.
The car at 6psi made 600whp and 700ft lbs...
If i can just clear up the smoking issue, i'll enjoy the car..
First get rid of that pump. We only use the Weldon since its the pump we have had best luck with on rear mount customers that trash the pump that is supplied with their STS kits. Get the Weldon 9200 and oil return setup. You still need the check valve though which needs to be close to your oil pickup from the supply line. If you don't already put another check valve at the oil pan (on the drain line) to prevent any oil from getting out of the pan. If you don't a lot of oil will flow out to downpipe and cause your smoking issue if the turbo is below drain level. You could also put a check valve on the inlet to the pump. With this setup you can ditch the oil scavenge tanks which you said you don't have already. Also when you spoke with Heffner did you not mention the turbos were below oil pan level??
First get rid of that pump. We only use the Weldon since its the pump we have had best luck with on rear mount customers that trash the pump that is supplied with their STS kits. Get the Weldon 9200 and oil return setup. You still need the check valve though which needs to be close to your oil pickup from the supply line. If you don't already put another check valve at the oil pan (on the drain line) to prevent any oil from getting out of the pan. If you don't a lot of oil will flow out to downpipe and cause your smoking issue if the turbo is below drain level. You could also put a check valve on the inlet to the pump. With this setup you can ditch the oil scavenge tanks which you said you don't have already. Also when you spoke with Heffner did you not mention the turbos were below oil pan level??
JZ
JZ
thanks for the reply. Im going to check today and see if they are infact below the oil level. Heffner said , they tap below the oil level. I probably should of used E covers on the turbos. Prob would of sat me about 1/2 - 1 inch higher in that well. I went with a 1.03 backhousing which is big in itself. Do you sell a complete kit for this ?? Maybe i was using the wrong check valve. I had a zero crack pressure, but it seemed oil was staying in the cartridges. Im ready to hang myself, nothing worse then driving a really nice car and smoke billows by you at a light .. Thanks for your help, and thanks for the positive feedback.
id love to see this setup. i need to do a bunch of homework on this stuff. im seriously thinking of going with the heffner DIY...but wanna look into all the options.
Mark, the E-covers save space but cost hp indeed. As for a check valve kit, sorry I don't stock any of the parts since I rarely encounter these problems with rear mount kits, since most owners just complain back to the guys they buy the kits from...hehe. Are you running any restrictors on the feed side?? Also I imagine you have the center section clocked at 0 degrees (straight up and down).
Mark, the E-covers save space but cost hp indeed. As for a check valve kit, sorry I don't stock any of the parts since I rarely encounter these problems with rear mount kits, since most owners just complain back to the guys they buy the kits from...hehe. Are you running any restrictors on the feed side?? Also I imagine you have the center section clocked at 0 degrees (straight up and down).
I have the turbos clocked up and down. The feed is stepped down to .041.. Do you know where i can get these check valves ?
They are like $12 for the 1/4". If you need a larger one they make them all the way to 1/2". If you need turbo help anytime, feel free to contact us. BTW, they are spring loaded piston style, so that should take care of your problems.
First get rid of that pump. We only use the Weldon since its the pump we have had best luck with on rear mount customers that trash the pump that is supplied with their STS kits. Get the Weldon 9200 and oil return setup. You still need the check valve though which needs to be close to your oil pickup from the supply line. If you don't already put another check valve at the oil pan (on the drain line) to prevent any oil from getting out of the pan. If you don't a lot of oil will flow out to downpipe and cause your smoking issue if the turbo is below drain level. You could also put a check valve on the inlet to the pump. With this setup you can ditch the oil scavenge tanks which you said you don't have already. Also when you spoke with Heffner did you not mention the turbos were below oil pan level??
JZ
Call me if you still need some help... 704-361-3443
I had the same problem.. I appears from your pictures the turbos are below the oil level and you have oil lines exiting the turbos and running uphill. I have the STS pump and have no problems with smoking now that I ran check valves before and after the turbo. The check valves before the turbo also restict to .035. It seems like you have oil leaking back into the turbo and seaping into the compressor housing while the car is sitting. I am having problems now with oil coming out of the breathers, so I am fabing a catch tank with return to the pan. I would suggest you do the same as you will get blow by. Also if you are getting smoke out the exhaust you are getting oil in the intake, you need to clean you innercooler and tubing all out. I got 1/2 qt of oil out of mine when I first had my smoking problem. Nice set up BTY. I think we PM'd each other a couple months ago about fuel upgrades. Good numbers to! Anything over 25 Hp per # of boost is really good.
Call me if you still need some help... 704-361-3443
I will def call you, thank you everyone for your help. I cant believe how imformative this site is... Had i posted before hand i prob would of set it up a bit different.
Im going to get it on the lift tomm, and see exactley how far i am from the oil level. They dont make it easy for fitment down there. I had to shoehorn the turbos in. I know i have oil in the intercooler, dreading taking that monster off, but i guess i have to. Just makes a mess overall, because the bov's stay open at idle, oil goes everywhere.
Cant say enough about the ems for the car though, the car gets better gas mileage now then it did stock. ACT is making me a clutch ( prototype ) so i'll let you know how it is. Its supposed to support 1k ft lbs.
My duty cyle on the 850's at 6psi is only 41 percent. I would of thought they would be higher. How much boost can i run before i run out of pump ?
I had the same problem.. I appears from your pictures the turbos are below the oil level and you have oil lines exiting the turbos and running uphill. I have the STS pump and have no problems with smoking now that I ran check valves before and after the turbo. The check valves before the turbo also restict to .035. It seems like you have oil leaking back into the turbo and seaping into the compressor housing while the car is sitting. I am having problems now with oil coming out of the breathers, so I am fabing a catch tank with return to the pan. I would suggest you do the same as you will get blow by. Also if you are getting smoke out the exhaust you are getting oil in the intake, you need to clean you innercooler and tubing all out. I got 1/2 qt of oil out of mine when I first had my smoking problem. Nice set up BTY. I think we PM'd each other a couple months ago about fuel upgrades. Good numbers to! Anything over 25 Hp per # of boost is really good.
A scavenge tank ?? I did some research on how to make this. The problem i came up with is , you have to gravity feed to the scavenge tank, then suck out of there. How the hell can you gravity feed to a tank when the turbos are about 6 inches from the ground ? im so scared of bottoming out on the highway. How are you getting blow by ? and how do you know whats causing the problem with your oiling ? Sorry for all the questions
A scavenge tank ?? I did some research on how to make this. The problem i came up with is , you have to gravity feed to the scavenge tank, then suck out of there. How the hell can you gravity feed to a tank when the turbos are about 6 inches from the ground ? im so scared of bottoming out on the highway. How are you getting blow by ? and how do you know whats causing the problem with your oiling ? Sorry for all the questions
mark
turbotrix
mount a tank on your inner fender (photos on post in org site) Run a tube from the valve cover to the side of the tank, then run a tube from the bottom to a bulkhead fitting above the oil level in your pan. Then put a air cleaner on the top. It will provide add'l venting for the lower unit as well as upper (valve covers) and will let the blow by drain back in the pan when your off boost. I just started getting it as the weather warmed up and I run it hard over 8 lbs boost. I noticed all Heffner's ad Hennessey's cars have them. You will get oil out of your breathers and possibly dip stick. The other trick is a vaccum pump, but it would be a bitch to mount one of the crank pully.
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