A to Z Posted Wednesday at 08:19 AM Share Posted Wednesday at 08:19 AM (edited) Hello! Since my turbo project is going well, I wanted to ask if any of you have any thoughts as to what I can expect from my T3/T04 turbo with .50 A/R 48 trim) with a .63 turbine housing (trim 74.2) on my 2.9 stroker? Since I like quick spool, I think a turbine with more vanes might be nice. Thoughts? Thanks in advance. Edited Thursday at 04:15 AM by A to Z Jesus is the living Son of God Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted Wednesday at 04:28 PM Share Posted Wednesday at 04:28 PM I don't think you have your trim specs right. Trims are usually whole numbers. The 74.2 just so happens to be the measure of one particular turbo e wheel's inducer diameter - and it is for a GT3076 turbo. A 50 trim compressor section is one of the just right compressors for our size engines in the normal journal T3/T4 series turbos. If you want lower spool the the T350 turbine (stage III) would be perfect. If you want more top end power then go with a stage V turbine. 1 Quote Link to comment Share on other sites More sharing options...
A to Z Posted Thursday at 02:33 AM Author Share Posted Thursday at 02:33 AM thanks. T350 turbine Stage III....if you had to guess, at what RPM would it fall flat? Quote Link to comment Share on other sites More sharing options...
A to Z Posted Thursday at 09:37 AM Author Share Posted Thursday at 09:37 AM 17 hours ago, Brad-ManQ45 said: I don't think you have your trim specs right. Trims are usually whole numbers. The 74.2 just so happens to be the measure of one particular turbo e wheel's inducer diameter - and it is for a GT3076 turbo. A 50 trim compressor section is one of the just right compressors for our size engines in the normal journal T3/T4 series turbos. If you want lower spool the the T350 turbine (stage III) would be perfect. If you want more top end power then go with a stage V turbine. here are my T3/T04 Turbo specifics: Turbine Side: Turbine Trim: 74.2 Turbine A/R: 0.63 Turbine Inducer: 64.8mm Turbine Exducer: 55.8mm Turbine exhaust outlet : 79mm Turbine exhaust inlet: 44.7mm(length)/85.8mm(width) Compressor Side: Compressor Trim: 48.1 Compressor A/R: 0.5 Compressor Inducer: 52.7mm Compressor Exducer: 76mm Compressor outlet:78 mm Compressor inlet:51.5 mm Quote Link to comment Share on other sites More sharing options...
A to Z Posted Thursday at 09:50 AM Author Share Posted Thursday at 09:50 AM Exhaust turbine is 10 vane, 64.8 inducer /55.8 exducer. Seems like its a quick spool setup already. can it product to 6000 RPM on a 2.9 stroker L6? Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted Friday at 06:11 AM Share Posted Friday at 06:11 AM It'll be choked off a bit and start to spool around 2800 with full spool around 3200(estimated). Stage III turbine is like a 68 mm inducer and 62.35 mm exducer. The compressor wheel you are describing is awfully close to the 50 trim T04E and is a good match for the engine if not turning over 6k. 1 Quote Link to comment Share on other sites More sharing options...
A to Z Posted Saturday at 02:29 AM Author Share Posted Saturday at 02:29 AM choked off a bit.....just hard to get spinning?, or are you talking about the stage III will be that way? Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted Saturday at 05:48 AM Share Posted Saturday at 05:48 AM Top end will be choked off a bit. Your power will be in the low to midrange rpms. Quote Link to comment Share on other sites More sharing options...
A to Z Posted Saturday at 07:34 PM Author Share Posted Saturday at 07:34 PM well I hope so. I like my power under 6K RPM's thanks for the help. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted Saturday at 08:24 PM Share Posted Saturday at 08:24 PM You may not GET to 6k with any power... 1 Quote Link to comment Share on other sites More sharing options...
A to Z Posted yesterday at 08:26 AM Author Share Posted yesterday at 08:26 AM (edited) I don't really like taking her over 5000 RPM really anyway. The cam is stock, and its a stroker with all the power where I like it.... mid range. If this is going to give me that type of power, frankly I couldn't ask for more. Its a high compression engine (11.5 to 1), and this is meant to just lightly turbocharge it. I am at 6035 ft. elevation, so basically lose a point and a half on the thin air. This is a Draw through setup on an old crown turbo kit that has been updated. I have a snow performance water/methanol kit with 2 nozzles to cool it down and give it a bit more octane....and a J&S Safeguard Knock sensor with individual cylinder timing pull. It's mainly for looks and a little bit extra push....it's a cruiser. Edited yesterday at 08:28 AM by A to Z 1 Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted 22 hours ago Share Posted 22 hours ago Then you should be golden... Quote Link to comment Share on other sites More sharing options...
A to Z Posted 17 hours ago Author Share Posted 17 hours ago Thanks again for all your help. God bless. Quote Link to comment Share on other sites More sharing options...
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