# Turbo Question
**URL:** https://forums.speedlife.net/t/turbo-question/172163
**Category:** PittSpeed Off Topic
**Created:** [February 7, 2005, 7:25am UTC](https://forums.speedlife.net/t/turbo-question/172163 "2005-02-07T07:25:52Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)
#### Post date: [February 7, 2005, 7:25am UTC](https://forums.speedlife.net/t/turbo-question/172163/1 "2005-02-07T07:25:52Z")
I was reading about the engine in my truck this weekend and found that the compression ratio was less than 8:1. I was on a truck board and everyone said to scrap the 360 and get a 390 with 10:1 if you want to make any power out of it. Doesn’t forced induction like low compression? Also, how cheap can a turbo be fitted to a big block ford? I keep hearing about junkyard turbo systems being pieced together for a couple hundred bucks and want to know what I would need. I have no clue even how to run the exhaust/turbo/ anything else involved with a turbo. I think it would be cool to have a turbo truck. I need to rebuild the motor anyway, so i figured I would check all my options.
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### Author:  [@eurodad](https://forums.speedlife.net/u/eurodad)
#### Post date: [February 7, 2005, 7:27am UTC](https://forums.speedlife.net/t/turbo-question/172163/2 "2005-02-07T07:27:37Z")
if your truck is a 360, it’s not a big block.
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### Author:  [@oneslowbowtie](https://forums.speedlife.net/u/oneslowbowtie)
#### Post date: [February 7, 2005, 7:30am UTC](https://forums.speedlife.net/t/turbo-question/172163/3 "2005-02-07T07:30:07Z")
weezer 305 \> turbo’ed 390 boat anchor
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### Author:  [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)
#### Post date: [February 7, 2005, 7:30am UTC](https://forums.speedlife.net/t/turbo-question/172163/4 "2005-02-07T07:30:08Z")
> [@eurodad](#):
>
> if your truck is a 360, it’s not a big block.
yes it is
CI doesn’t mean shit
a 427 was made both a big block and a small block
a ford FE series engine range from 352CI-428CI and all are considered big blocks
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### Author:  [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)
#### Post date: [February 7, 2005, 7:32am UTC](https://forums.speedlife.net/t/turbo-question/172163/5 "2005-02-07T07:32:09Z")
> [@oneslowbowtie](#):
>
> weezer 305 \> turbo’ed 390 boat anchor
probably, but I want to be different
turbo 360\>na 305
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### Author:  [@eurodad](https://forums.speedlife.net/u/eurodad)
#### Post date: [February 7, 2005, 7:33am UTC](https://forums.speedlife.net/t/turbo-question/172163/6 "2005-02-07T07:33:03Z")
we have a 76 ford highboy POS at work with a 360. i would not call it a big block.
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### Author:  [@BlkP42E](https://forums.speedlife.net/u/BlkP42E)
#### Post date: [February 7, 2005, 7:33am UTC](https://forums.speedlife.net/t/turbo-question/172163/7 "2005-02-07T07:33:59Z")
Turbo, prob like 3" piping to bend/weld, clamps, turbo flanges to weld to your headers, intercooler
talk to dappie99 or P8ntballer, they both run JY turbo setups, they would be your best resource.
also [www.turbomustangs.com](http://www.turbomustangs.com) is your friend
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### Author:  [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)
#### Post date: [February 7, 2005, 7:35am UTC](https://forums.speedlife.net/t/turbo-question/172163/8 "2005-02-07T07:35:41Z")
> [@BlkP42E](#):
>
> Turbo, prob like 3" piping to bend/weld, clamps, turbo flanges to weld to your headers, intercooler
>
> talk to dappie99 or P8ntballer, they both run JY turbo setups, they would be your best resource.
>
> also [www.turbomustangs.com](http://www.turbomustangs.com) is your friend
thank you, finally someone who realizes this is on-topic :D:D:D:D:D:D
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### Author:  [@eurodad](https://forums.speedlife.net/u/eurodad)
#### Post date: [February 7, 2005, 7:35am UTC](https://forums.speedlife.net/t/turbo-question/172163/9 "2005-02-07T07:35:52Z")
i work on fords every day. i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them i hate them
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### Author:  [@eurodad](https://forums.speedlife.net/u/eurodad)
#### Post date: [February 7, 2005, 7:37am UTC](https://forums.speedlife.net/t/turbo-question/172163/10 "2005-02-07T07:37:04Z")
BTW it would probably be easier if you put some type of FI on it.
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### Author:  [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)
#### Post date: [February 7, 2005, 7:37am UTC](https://forums.speedlife.net/t/turbo-question/172163/11 "2005-02-07T07:37:18Z")
> [@eurodad](#):
>
> we have a 76 ford highboy POS at work with a 360. i would not call it a big block.
it doesn’t matter what you would call it, everyone and their mother knows that the FE line of engines are considered big blocks.
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### Author:  [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)
#### Post date: [February 7, 2005, 7:38am UTC](https://forums.speedlife.net/t/turbo-question/172163/12 "2005-02-07T07:38:37Z")
> [@eurodad](#):
>
> BTW it would probably be easier if you put some type of FI on it.
I don’t have the $1200 it costs to put fuel injection on it. I prefer a carb anyway. computers suck in cars
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### Author:  [@GNocide](https://forums.speedlife.net/u/GNocide)
#### Post date: [February 7, 2005, 7:39am UTC](https://forums.speedlife.net/t/turbo-question/172163/13 "2005-02-07T07:39:47Z")
turbos love low compression
lower compression= higher boost levels on pump gas
under 8 to 1 = about 19psi in a turbo buick or t/a without knock and 92-93 octane(not factoring bigger intercoolers or anything else)
talk to the turbo mustang guys about your n/a motor
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### Author:  [@T70\_Tsi](https://forums.speedlife.net/u/T70_Tsi)
#### Post date: [February 7, 2005, 7:48am UTC](https://forums.speedlife.net/t/turbo-question/172163/14 "2005-02-07T07:48:26Z")
compression ratio does not determine how much boost you can run it determines the margin of error you have when tuning it, higher compression = smaller tuning window. to the “average” person yes higher compression would = less boost
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### Author:  [@GNocide](https://forums.speedlife.net/u/GNocide)
#### Post date: [February 7, 2005, 9:39am UTC](https://forums.speedlife.net/t/turbo-question/172163/15 "2005-02-07T09:39:06Z")
> [@BlueMeanieTSi](#):
>
> compression ratio does not determine how much boost you can run it determines the margin of error you have when tuning it, higher compression = smaller tuning window. to the “average” person yes higher compression would = less boost
on pump gas with -all things being equal it does.
ill run more boost per same octane on an 8 to 1 car then the same car on 10 to 1
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### Author:  [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)
#### Post date: [February 7, 2005, 9:41am UTC](https://forums.speedlife.net/t/turbo-question/172163/16 "2005-02-07T09:41:19Z")
what size turbo would be good? I only want about 350-400hp with a max rpm around 4500-5000 rpm
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### Author:  [@GNocide](https://forums.speedlife.net/u/GNocide)
#### Post date: [February 7, 2005, 9:46am UTC](https://forums.speedlife.net/t/turbo-question/172163/17 "2005-02-07T09:46:13Z")
> [@77rednecktruck](#):
>
> what size turbo would be good? I only want about 350-400hp with a max rpm around 4500-5000 rpm
talk to bluemenie about turbo size/specs
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### Author:  [@fshowcars](https://forums.speedlife.net/u/fshowcars)
#### Post date: [February 7, 2005, 9:47am UTC](https://forums.speedlife.net/t/turbo-question/172163/18 "2005-02-07T09:47:33Z")
> [@Dick Starbucks](#):
>
> on pump gas with -all things being equal it does.
>
> ill run more boost per same octane on an 8 to 1 car then the same car on 10 to 1
yeah… but boost isn’t a static measurement… it’s simply psi, but at what cfm?
i run 22+ psi on my stock vw motor with stock turbo.
that doesn’t equal 22psi on a t3t4 of any size…
lower compression is ‘better’ for FI, but compression makes HP
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### Author:  [@GNocide](https://forums.speedlife.net/u/GNocide)
#### Post date: [February 7, 2005, 9:55am UTC](https://forums.speedlife.net/t/turbo-question/172163/19 "2005-02-07T09:55:12Z")
> [@fshowcars](#):
>
> yeah… but boost isn’t a static measurement… it’s simply psi, but at what cfm?
>
> i run 22+ psi on my stock vw motor with stock turbo.
>
> that doesn’t equal 22psi on a t3t4 of any size…
>
> lower compression is ‘better’ for FI, but compression makes HP
true statment
to run safely with no knock same everything = more boost
i can run 34lbs on your stock turbo too then the head will lift or ill run over the crank.
boost makes horsepower better then compression and more efficiently
1 point of compression ratio makes=2% hp
1psi of boost =6.8 hp(1 divided by 14.7 =6.8%)
1psi of boost =.5 compression ratio
so an 8 to 1 car with 16 psi at sea level is running at 16 to 1 under full boost.
try that with an n/a block with no nos
i know which one id rather have.
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### Author:  [@T70\_Tsi](https://forums.speedlife.net/u/T70_Tsi)
#### Post date: [February 7, 2005, 10:16am UTC](https://forums.speedlife.net/t/turbo-question/172163/20 "2005-02-07T10:16:25Z")
> [@Dick Starbucks](#):
>
> on pump gas with -all things being equal it does.
>
> ill run more boost per same octane on an 8 to 1 car then the same car on 10 to 1
it’s in the tuning not the cfm
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