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#61
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Thanks for the help.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#62
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You are probably right. I would hazard to guess that with the cooling properties of E85 although not as much as methanol I might be ok without an IC. Thanks for the help.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#63
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I do have a 467 that is a runner right now that I am planning on starting my turbo build with.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#64
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#65
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I think 4.25 bore is a good start. That is what I'm building with a PT 91.5 turbo.Rodney Butler has a 4.25 X 4.25 combo.
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#66
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Without doing the calculations, shooting from the hip so to speak, if you were to buy the S475 and use on the 467, at low rpm, low boost, correct sized exducer, it should be fine at low boost levels and I think meet your current goals, it would have virtually zero lag time as well. Then if you do build a bigger engine, you could buy another s475 and with twins meet your goals then with a shortblock that can handle the power. The s475 route is the cheapest I've come up with to make good power in a twin configuration. Other wise you could buy a turbo in the 88-103mm range that would work on both, more money up front for the turbo, but somewhat of a one time expense. Generally speaking, you need a bigger "cheap" turbo to make the same power as a smaller turbo built for class racing, mostly due to billet wheel designs and the cost that go with them. If you get everything match right, it is really hard to not make big power with turbos. |
#67
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Building a merge is easier out of steel (single) than aluminum (twins) mainly due to welding. (same work involved in building both merges). |
#68
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The downside to the BW's is the weight,they weigh about 50lbs each! I almost went that route but couldn't bring myself to bolt that much weight to the front end. In the end I went with a pair of MP T70's, just enough for the 1200-1400hp I want and they only weigh around 20lbs each. Oh yeah, and they were only $575 each.
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#69
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#70
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Thanks for your help. I am sure I will have a lot of questions as I get.further into this build.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#71
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I merely suggested the 472 t4 Borgs as they are a suitable match to what he has planned for now and large enough to cover a bigger ci stronger higher power combo later. I dont know as much(or hear as much) about the MPs as the Borgs. If he runs a single, a T6 housing is best way to go on 400+ ci motors IMO. |
#72
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Thanks for the help Bruce and everyone else who has helped me.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#73
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I agree the BW's are a good turbo for the money,never seem to hear of any problems with them either. I believe the Master Power turbos have been renamed to Magnum turbos but are basically identical.
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#74
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I need to check into the MP's more closely... I've seen nothing negative but havent brought myself up to date on them and dug in. I can think of a few Turbonetic and Garrets that could work well, but I like the Borgs hot side drive capabilities and the cold side's wide maps...
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#75
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A pair of T-72 or T-76 Turbonetics Turbos will easily make the 1400 HP Target and each turbo weights 26 Pounds (on my bathroom scale). (:>).
Tom Vaught
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#76
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A mate of mine has a pair of Precision 76's with billet comp wheels on his BBC combo,easy 1800hp capability, about 25lbs each in weight and they weren't expensive either, around $1250 each IIRC, sourced them through Travis.
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#77
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My IAT's drop going down the track with roughly half the ethanol through the supercharger - not a turbo. For a blow through I'd run no IC, injected in the runner you'll want it over about 15lbs. Gdlk!
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The secret to happiness is not getting what you want but rather, wanting what you have. |
#78
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Did I see blow thru ????? Do yourself a favor and go EFI -- It can do so much more and make the engine happy --
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#79
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I am going thru the specifying phase right now on a pair of billet turbo's for my 555. Since its only a street car I know the compressor side. 72mm. Plenty of power available from twin 72's.
But there is still some thought being put into the turbine side as to the best size. 83mm or 87mm in a 1.3 A/R stainless housing that uses a V-band mount. And the primary pipe on the turbo headers will only be 2". On a N/A motor, a 555 would be at least 2.250. So big difference there. |
#80
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I am hoping to do EFI. I have most of the parts now, but need to get the Electronics side of the FI figured out.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
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