Questions for the turbo gurus
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TECH Fanatic
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From: Charlotte, NC / Ansonia,CT
Questions for the turbo gurus so i got a couple questions for the turbo gurus, i figured this would be the best place since its the FI section 
ill start with i have a 77 nova fully done up at with a 486 BBC with a nice hit of juice, im not very happy with the motor or the cost of race fuel. my buddy proposed a swap between the 2 of us as he wants a BB rather then SB turbo. the deal is his 355 fully forged SB chevy, with aluminum heads, intake, blow threw carb, t76 turbo and full kit, the motor is a 4bolt main, and he has the turbo cam in it now. the motor was originally designed to hold up to a f3 so the crank is keyed and every part of this motor is desired efficiently and is very well built. the only thing not included in this swap is the water to air intercooler but he told me at 10 psi or less i dont need one. at 12 psi he made a lil over 650 to the wheels. it is going into a street/strip car that rarely is takin out of the garage these days, but the swap seems kinda cool. i was just wondering how much power i could possibly make with this motor seeing as he was told the motor will hold up to 50 lbs of boost if he felt that crazy and if the turbo would hold up to it. he is giving me the turbo cam and blower cam, and the motor is currently 8.5:1 compression. he designed it to run on 91 pump gas which is another thing i like. my fuel system, trans, and suspension will work perfect with this if i decide to do it. but what kind of extra maintenance or problems should i worry about doing this swap? and i know im sorry its not a LS1, but i figured you guys have the wisdom no matter what style v8 it is
ill start with i have a 77 nova fully done up at with a 486 BBC with a nice hit of juice, im not very happy with the motor or the cost of race fuel. my buddy proposed a swap between the 2 of us as he wants a BB rather then SB turbo. the deal is his 355 fully forged SB chevy, with aluminum heads, intake, blow threw carb, t76 turbo and full kit, the motor is a 4bolt main, and he has the turbo cam in it now. the motor was originally designed to hold up to a f3 so the crank is keyed and every part of this motor is desired efficiently and is very well built. the only thing not included in this swap is the water to air intercooler but he told me at 10 psi or less i dont need one. at 12 psi he made a lil over 650 to the wheels. it is going into a street/strip car that rarely is takin out of the garage these days, but the swap seems kinda cool. i was just wondering how much power i could possibly make with this motor seeing as he was told the motor will hold up to 50 lbs of boost if he felt that crazy and if the turbo would hold up to it. he is giving me the turbo cam and blower cam, and the motor is currently 8.5:1 compression. he designed it to run on 91 pump gas which is another thing i like. my fuel system, trans, and suspension will work perfect with this if i decide to do it. but what kind of extra maintenance or problems should i worry about doing this swap? and i know im sorry its not a LS1, but i figured you guys have the wisdom no matter what style v8 it is
well if its the SB chevy with the heads that have the 2 middle exhaust ports right next to each other then, correct me if I'm wrong, but I believe you are limited to 900 hp due to the high amount of heat generated by the ports being so close together. I could be wrong though. Just my .02
Teching In
Joined: Apr 2007
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You don't want to through 50lbs at any motor if you ever want it to last more than a second. as for the swap that's not a bad deal if its a straight up trade. i have had plenty of both and would a take a Turbo SB over a BB with spray. mainly preference. as far as maintenance not much more than your current setup i would think. you will have to make sure all your oil lines are tight and don't leak and spark plugs seem to last longer in boosted cars than cars on the bottle.
You should go to theturboforums.com and go to the chevy section. The heads are not the issue, its the block itself (if its still a standard production block). they crack around 900-1000hp.
http://www.youtube.com/watch?v=byVsl3Beldw
http://www.youtube.com/watch?v=exARf...eature=related
http://www.youtube.com/watch?v=byVsl3Beldw
http://www.youtube.com/watch?v=exARf...eature=related
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