zbigtim Posted November 17, 2008 Share Posted November 17, 2008 I aquired this turbo on ebay last week, not knowing what I was really bidding on. Supprising to me, I won it pretty cheep, which makes me a little worried. The unit has been installed and slightly used, but the shaft turns freely without any end play. The Tag shows 409250-2005s, which also translates to a Garrett T04B15. When I google these numbers I don't find a whole lot of good information. I have come to the conclusion that the exhaust housing will not work. It does not match up to the exhaust manifold. I also believe that the exhaust housing is too large for a street L28. Can anyone tell me what I really have? Coments are welcome... Tim. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted November 18, 2008 Share Posted November 18, 2008 Your best bet it to take the compressor off and measure the inducer and exducer. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted November 19, 2008 Author Share Posted November 19, 2008 Thanks for the advise Let it Snow. I will do that. I wonder if I can replace the exhaust housing with that of a T3. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted November 19, 2008 Share Posted November 19, 2008 You should be able to replace the housing and wheel without much issue. Assuming it doesn't have some freak compressor size it should work fairly well on an L28 with a t3 hot side. Here are some of the more common t04b flow maps. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted November 20, 2008 Author Share Posted November 20, 2008 Thank you letitsnow, thats some awsome info. Forgive me, I'm new to the turbo stuff, does the "s" in the part number 409250-5002s mean that the compressor is the "S" trim? I will be disassembling the compressor to measure this weekend, as you suggested. Who would be a good source for the exhaust housing and wheel? Tim. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted November 22, 2008 Share Posted November 22, 2008 I can't speak for any of the vendors here personally as I haven't bought from them, but I'm sure they would be a good place to start. There's a chance that's what the S on the end of the part number means, but I highly doubt it. Here is a link that has dimensions of many common compressor wheels. Quote Link to comment Share on other sites More sharing options...
cockerstar Posted November 28, 2008 Share Posted November 28, 2008 Why not use an adapter plate to run it as is rather than turning it into a t3/t4 hybrid? Quote Link to comment Share on other sites More sharing options...
letitsnow Posted November 28, 2008 Share Posted November 28, 2008 Why not use an adapter plate to run it as is rather than turning it into a t3/t4 hybrid? If it has the correct size turbine housing then that could work, but it probably has a huge hotside. The T04b-25 that I have has a 1.32a/r housing with a p-trim wheel, WAY too big for an l28. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted November 29, 2008 Author Share Posted November 29, 2008 Sorry for the delay, guys. I will be disassembling the compressor this evening and taking measurements as letitsnow suggested. Tim. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted November 29, 2008 Author Share Posted November 29, 2008 Well, I took the turbo apart and here is what I found: The compressor side dimensions, The outside diameter of the compressor wheel is 2 3/4". The inlet diameter (2 3/4" OD - 2 3/8" ID which cones down to 1 3/4") The outlet diameter (2" OD) Look what I found on the inside of the compressor outlet. The exhaust wheel is 2 3/4" in diameter and 1 3/16" deep. Quote Link to comment Share on other sites More sharing options...
Xnke Posted December 4, 2008 Share Posted December 4, 2008 That turbo looks to be in great shape. I'd definitely try to find a good turbine and housing from a T3 to fit it. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted December 5, 2008 Author Share Posted December 5, 2008 Can anyone tell me what compressor side I have? Will it work well with the L28? If so, are there what size turbine wheel should I be looking for? I would like to run 15lbs boost, with the compressor efficiency peak at about 3000 rpm, for good street use. Maybe I'm asking too many questions, and some of you may ask me to search before I ask the questions. I have done some searching, but I'm still a bit confused, and quite frankly the math in the Corky Bell book makes my head spin. Thanks... Quote Link to comment Share on other sites More sharing options...
Vintage Posted December 5, 2008 Share Posted December 5, 2008 If you put the cold side on a T3 hotside, it should work fairly well. I have a T04B off an old Banks kit for a 6.9 ford, it has a 1.00ar hotside, and a .60ar coldside, and that is exactly what I plan to do. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted December 5, 2008 Share Posted December 5, 2008 That link I posted earlier is dead, try this. http://www.turbocharged.com/catalog/comp_wheels.html You need the inducer(little) diameter and exducer(bigger) diameter to identify the compressor wheel. It looks like you've narrowed it down to the S trim, H trim, V trim, and T5/6. All of which should be acceptable for use on an L28. Quote Link to comment Share on other sites More sharing options...
Clifton Posted December 5, 2008 Share Posted December 5, 2008 I would get a better measurement on the compressor inducer. Big difference in flow between a S and V trim. You can run a .58 T4 flange housing on it, that's what I run on my L28 with a P trim. Or you could get a T3 housing machined to fit the P trim wheel. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted December 5, 2008 Author Share Posted December 5, 2008 Thank you guys for all the responses. I'm going to try and get some more accurate measurements, and go from there... Tim. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted December 5, 2008 Author Share Posted December 5, 2008 Okay, I have taken measurements with a caliper. The inducer measured at 1.877" and the exducer 2.758". Which points me to the s-trim, I believe. Thanks Letitsnow! Quote Link to comment Share on other sites More sharing options...
letitsnow Posted December 5, 2008 Share Posted December 5, 2008 That sounds like an S trim, my V trim didn't match the measurements exactly either. That should work very nicely on a street L28, nice find. Quote Link to comment Share on other sites More sharing options...
zbigtim Posted December 21, 2008 Author Share Posted December 21, 2008 Well, I found a complete stock T3 turbo on ebay last week and received it last night. Today I disassembled it to install the exhaust housing and turbine on my T04B. Much to my dismay, I found a crack in the T3 exhaust housing. I'm really bummed and I guess still looking for a T3 exhaust housing. BTW how do I remove the exhaust turbine. I was able to remove the compressor wheel nut. I don't want to be too aggressive in fear of bending something. Tim. Quote Link to comment Share on other sites More sharing options...
Clifton Posted December 21, 2008 Share Posted December 21, 2008 The cracks won't effect it at all. Remove the compressor wheel. They can gall on the shaft if you have to turn it alot without it slowly coming off. Once it's off, lightly tap on the threaded end of the shaft and the turbine will pop out. The only that that will be giving resistance is the piston ring on the end of the turbine wheel. You just need enough force to pop that out. Same with putting it back in just make sure you have the ring seated as far as it will go into the chamfer in the center housing. Use the T4 heat shield with the T4 wheel too. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.