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Anonymous
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The Holley mechanical secondary 4150 4-bbl is the almost universal choice for a blow-thru. I'd guess a 650 CFM for a 200 CID engine, or a 750 CFM for a 250 CID engine.sefus":15semqgq said:
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Anonymous
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I would call Autozone/Checker/PepBoys for a rebuilt carb. They deal in volume and their prices are generally about as good as you'll see. If you want/need a more cutting edge solution, try Demon Carbs.
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Anonymous
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I've done the 231 Buick Turbo onto a 250 Chevy and it worked fine. That was several years ago and it's still running great up in Ohio. I hear from the guy that bought it, now and then.
I wish we had of installed a water injection unit on it so we could have cranked the boost up, it's only running 5psi.
We used the entire turbo unit, Qjet carb and all. I didn't even have to touch the carb settings, it was close enough.
Ebay no# 2445968019 is were you will find another complete unit, there is 5 days left.
BTY: The 250 Chevy was completely stock but it sure didn't feel like it.
John
I wish we had of installed a water injection unit on it so we could have cranked the boost up, it's only running 5psi.
We used the entire turbo unit, Qjet carb and all. I didn't even have to touch the carb settings, it was close enough.
Ebay no# 2445968019 is were you will find another complete unit, there is 5 days left.
BTY: The 250 Chevy was completely stock but it sure didn't feel like it.
John
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Anonymous
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If it's a draw through style like the early Buick, you do nothing. It will supply more than enough fuel.
If it's a blow through style then you have to Boost Reference the pump. There is a small hole in the top of the pump that allows air into the dry side of the diaphram area. You have to drill it out a little larger and tap it to accept a small nipple. A hose is attached to the nipple and to the intake manifold. That way as the boost goes up, so does the fuel pressure.
With EFI there is a fuel regulator that you can buy that can be boost referenced. It is sold by a dozen different companies mainly the supercharger manufacturers. It's fairly priced but you can find them on Ebay real cheap.
John
If it's a blow through style then you have to Boost Reference the pump. There is a small hole in the top of the pump that allows air into the dry side of the diaphram area. You have to drill it out a little larger and tap it to accept a small nipple. A hose is attached to the nipple and to the intake manifold. That way as the boost goes up, so does the fuel pressure.
With EFI there is a fuel regulator that you can buy that can be boost referenced. It is sold by a dozen different companies mainly the supercharger manufacturers. It's fairly priced but you can find them on Ebay real cheap.
John
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Anonymous
Guest
Got my rebuilt Q-jet today. It's the Buick turbo part number so it has the power system that's referenced to manifold vacuum/pressure. Plan to put a small check valve between manifold and carb so it'll read vacuum in the manifold, but not boost. I know from nothing about Q-jets, so I thought a professionally remanufactured one was best for me.
For a JY DIY project, it's getting expensive. Ordered an MSD 6-BTM yesterday. That's about all the hardware.
Now it's mock up time and fabricating some brackets and pipes.
I'll do pictures as I go.
Wish someone built an aluminum sheetmetal rocker cover for the 200. Looks like you could make the sides straight with welded in tubes for bolts. Make it a bit higher so it would clear everything--roller rockers, etc. You'd think I haven't spent enough money as it is.
For a JY DIY project, it's getting expensive. Ordered an MSD 6-BTM yesterday. That's about all the hardware.
Now it's mock up time and fabricating some brackets and pipes.
I'll do pictures as I go.
Wish someone built an aluminum sheetmetal rocker cover for the 200. Looks like you could make the sides straight with welded in tubes for bolts. Make it a bit higher so it would clear everything--roller rockers, etc. You'd think I haven't spent enough money as it is.
why not use this for boost:
http://www.holley.com/HiOctn/ProdLine/P ... 950TB.html
I think that would ideal. I'm going EFI eventually, so maybe I will add a turbo. Also, I talked to a Holley guy, it seems it should work.
Slade
http://www.holley.com/HiOctn/ProdLine/P ... 950TB.html
I think that would ideal. I'm going EFI eventually, so maybe I will add a turbo. Also, I talked to a Holley guy, it seems it should work.
Slade
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