TeamCapri
Tech, Repairs, Upgrades => Capri XR-2 89-94 => Topic started by: sterling94capri on July 14, 2010, 07:12:00 AM
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Will the stock downpipe work for a vj-11? Do I need turbo gaskets for a 11 or a 14,or are they the same? I will be buying the vj 11 in the next day or so if this is as easy as it seams.Thanks Rocky.
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NO they are different.
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KEEP the stock turbine housing and use the VJ11 CHRA. This way you can retain the stock cast dump pipe and your downpipe. The CHRA is held in with 4 bolts and retainer washers, the bearing housings will swap between the two turbos. This will keep your spool time to a minimum.
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Thanks Rocketman. IF my turbo is rebuldable thats what I will do.Rocky
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Even if the turbo is not rebuildable, generally only the center sections with the bearing (CHRA) goes bad, the turbine housing would still be usable and you could put the VJ11 CHRA into the VJ14 and have the 14/11 hybrid.
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or,..lol
if you have a good center (either vj11 or 14 ) and the coldside housing and wheel are good on the existing vj11, you can build a 11/14 hybrid... you want the small hotside with the big coldside..
the exhaust wheels are the same size..
but on the coldside you need to keep the corresponding wheel with the corresponding housing...
when i did mine (way back in the day) i didnt even take the turbo out, i used the vj 11 coldside wheel and housing, and just bolted them to my exhisting 14 center. while it was still bolted to the manifold. you can hold the hotside wheel with a socket while taking the 8mm nut off the end of the shaft to swap wheels...
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Thanks both of you. So let me summerize. I may be able to hybrid the used VJ11 with my VJ 14 WITHOUT sending it out for a rebuild. Is that true? If I dont need balancing I have a guy who can probably do it locally. What about enlarging the waste gate or whatever? How big and how to? I have my eye on a good used VJ 11 on ebay for about 175 shipped. What do you think? Thanks a lot. I am sure I, and my mechanic will have more questions. Hey,how high can you boost a hybrid-once I get a good aftermarket gauge?Rocky
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on the hybrid turbo i would still run only 16 psi of boost because that is what the rocketchip is set the fuel maps at to keep the car safe.
the wastegate is very easy to open up when theturbo is taken apart. what i did was cover wastegate flapper with paint then close and just use a dremel tool to open up the hole. just make sure the wastegate can still close.
if you can find yourself a vj-20 downpipe i would get that. i use a vj-20 downpipe. its alot more opened up and will increase flow and spool time. you will need to get a new downpipe flange for the exhaust but will worth it. also comes with a pre-existing 02 bung for a wideband 02 sensor.
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Thanks Joshua. I have a dremel tool,I guess that sounds better than paying someone 80 bucks an hour to do it.Rocky
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exactly!! its very easy just go slow and constantly keep checking to make sure the hole is still completely covered. making the wastegate bigger will make a HUGE difference on keeping a handle on boost spike and boost creep.
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Thanks again Joshua. So do you think with a good used vj11 and my blown vj14 I can put together a hybrid with out sending it out for a 300 to 550 buck rebuild? I mean this is gonna cost me pretty heavy coin as it is!Rocky
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i would have to think it would need to be rebuilt because the way that i did mine was you take the exhaust housing off the turbo then you see the exhaust turbine and the compressor turbine. there is a small reverse thread bolt ... (TURN BOLT TO THE RIGHT TO LOOSEN ) i made that mistake first. then the compressor wheel will pull off. put the vj-11 compressor wheel onto the shaft and retighten bolt. then install the exhaust housing back onto the turbo. then put the new vj-11 compressor housing onto the turbo. so your keeping the same vj-14 exhaust turbine and the vj-14 bearing setup so you will need to get that rebuilt.
this setup like that will keep the smaller exhaust wheel which will spool the bigger vj-11 compressor wheel so you get the same spool time with the slightly more air pushed with the vj-11 compressor.
i dont know if there is a different way to make a turbo all i know is that this was the way i did mine and it made a big difference to my cars performance.
my turbo was in perfect condition with no shaft play so i did not take my turbo to get rebuild i just swapped the wheels and put back together. i have had no problems ... but if your turbo is blown i would think you still need to get it rebuilt because the only thing that is getting changed is the compressor wheel and housing.
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I would not swap compressor wheels without balancing....asking for trouble. They do it for a reason. Remember that thing is spinning upwards to 10000 rpms. Just think of little turbo bits bouncing around in your combustion chambers. Joshua...you got lucky or that thing is waiting to come apart. Just my .02. 350.00 for a good turbo rebuild or more than twice that for a motor and then a turbo rebuild. No reason to buy a complete VJ11. I can find you a housing and wheel..infact I probably have a housing..just need to find a wheel. If do it's 40.00 shipped to your door.
Clay
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well i guess i just got lucky lol. still no shaft play still and turbo spools and runs great!!!!!
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Thanks Clay. I will take you up on that offer! And that is really All the parts I need along with my hopefully rebuildable VJ 14.Let me now when you get the stuff together and I will send you the 40 bucks.Thanks again,Rocky
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i did mine the same way as josh and ran the car for two years like that with no problems...
the wheels on the little ihi turbos have marks on the backside where they were balanced..
there not balanced on the turbo...
if they were, how did they put the marks on the backside of the wheel from balancing???
if you clip a wheel, or do any other mods to the wheel, then the wheel needs to be rebalanced
the turbo dosent get balanced.. how do you balance a shaft running on journal bearings that fill with oil??
there not ball bearing turbos.. there tolerances are surprisingly loose.. but the wheels are balanced way before there put on the turbo...
ive put this one on that, and that one on this, and ive never had an issue...
Joe...
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i did mine the same way as josh and ran the car for two years like that with no problems...
the wheels on the little ihi turbos have marks on the backside where they were balanced..
there not balanced on the turbo...
if they were, how did they put the marks on the backside of the wheel from balancing???
if you clip a wheel, or do any other mods to the wheel, then the wheel needs to be rebalanced
the turbo dosent get balanced.. how do you balance a shaft running on journal bearings that fill with oil??
there not ball bearing turbos.. there tolerances are surprisingly loose.. but the wheels are balanced way before there put on the turbo...
ive put this one on that, and that one on this, and ive never had an issue...
Joe...
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Thanks Joe. But since my VJ 14 ended life in a 5 block several quarts of oil suicide I will need to send it out. I did hear some ticking from the turbo. If it cant be rebuilt I will need to get a good used one from Russ and try that way.But at least I am on my way to a hybrid.Rocky
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So randomly today I took my car out. I needed to go somewere and it was a must to use the car. After driving about 30 mins. The car started to get power back. My friend seems to think since its a non interference that its timing slipped all the way around?
Not to sure but it doesn't miss as much. Turbo spools up again. I'm so lost this car is possessed.
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if any one part of the belt system slips by more than like 2 notches on the belt the engine just won't run, so that's not the case. Have you checked the crank pulley at idle?
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Yeah it wiggles a little :(
Maybe my eyes. But it deff has a small wobble...
I can see my hope of it being alright go down the drain..