More New Scrambler Details
#191
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Re: More New Scrambler Details
"DougW" <post.replies@invalid.address> wrote in message
news:u4Chb.17849$Qo.13190@news2.central.***.net...
>
> Which is why I stuffed a blower on the 4.0 :)
> Turbos are good for high RPM boost but superchargers give
> you low end umph.
Depends on the design. Many turbo designs can develop lots of boost at
relatively low rpms. This is the whole point behind twin sequential turbos.
2 smaller turbos can spin up at lower exhaust gas pressures than one larger
one. Also, a centrifugal supercharger needs high rpm to build up decent
pressure too.
I have owned 2 different SAAB 9000 full pressure turbos. They both develop
full boost by the time they reach ~2500 rpm. They have a considerable
amount of torque for their low 2.4 liter displacements. 225 Hp and 258
ft/lbs in stock trim and with a chip they can be coaxed to 260 Hp and 287
ft/lbs easily with no other modifications. These engines were very torquey
and did not have very high redlines.
They are also not high tech engines made from unobtanium. They were early
'90's vintage engines that routinely ran 250-300k miles with only a timing
chain or head gasket in the interim. But the engines were designed with
forced induction in mind, unlike strapping a blower on a pushrod V-8.
What I'd really like to do is put a modified roots type blower on an 8
cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
aspirated). I'm sure that would be more than a handful.
-Fred W
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#192
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Re: More New Scrambler Details
Its up to 333 bhp at 6,100 rpm now ( 4.4 litre in the 745i).
Dave Milne, Scotland
'99 TJ 4.0 Sahara
"Fred W." <Fred.Wills@ nospam myrealbox.com> wrote in message
news:FGEhb.106980$qj6.3380134@news1.news.adelphia. net...
: What I'd really like to do is put a modified roots type blower on an 8
: cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
: aspirated). I'm sure that would be more than a handful.
:
: -Fred W
Dave Milne, Scotland
'99 TJ 4.0 Sahara
"Fred W." <Fred.Wills@ nospam myrealbox.com> wrote in message
news:FGEhb.106980$qj6.3380134@news1.news.adelphia. net...
: What I'd really like to do is put a modified roots type blower on an 8
: cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
: aspirated). I'm sure that would be more than a handful.
:
: -Fred W
#193
Guest
Posts: n/a
Re: More New Scrambler Details
Its up to 333 bhp at 6,100 rpm now ( 4.4 litre in the 745i).
Dave Milne, Scotland
'99 TJ 4.0 Sahara
"Fred W." <Fred.Wills@ nospam myrealbox.com> wrote in message
news:FGEhb.106980$qj6.3380134@news1.news.adelphia. net...
: What I'd really like to do is put a modified roots type blower on an 8
: cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
: aspirated). I'm sure that would be more than a handful.
:
: -Fred W
Dave Milne, Scotland
'99 TJ 4.0 Sahara
"Fred W." <Fred.Wills@ nospam myrealbox.com> wrote in message
news:FGEhb.106980$qj6.3380134@news1.news.adelphia. net...
: What I'd really like to do is put a modified roots type blower on an 8
: cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
: aspirated). I'm sure that would be more than a handful.
:
: -Fred W
#194
Guest
Posts: n/a
Re: More New Scrambler Details
Its up to 333 bhp at 6,100 rpm now ( 4.4 litre in the 745i).
Dave Milne, Scotland
'99 TJ 4.0 Sahara
"Fred W." <Fred.Wills@ nospam myrealbox.com> wrote in message
news:FGEhb.106980$qj6.3380134@news1.news.adelphia. net...
: What I'd really like to do is put a modified roots type blower on an 8
: cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
: aspirated). I'm sure that would be more than a handful.
:
: -Fred W
Dave Milne, Scotland
'99 TJ 4.0 Sahara
"Fred W." <Fred.Wills@ nospam myrealbox.com> wrote in message
news:FGEhb.106980$qj6.3380134@news1.news.adelphia. net...
: What I'd really like to do is put a modified roots type blower on an 8
: cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
: aspirated). I'm sure that would be more than a handful.
:
: -Fred W
#195
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Posts: n/a
Re: More New Scrambler Details
Fred W. did pass the time by typing:
> What I'd really like to do is put a modified roots type blower on an 8
> cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
> aspirated). I'm sure that would be more than a handful.
Considring my friend at work drives a BMW M5 with the 4.5 engine and
wants me to do the blower install... I'll let you know. :)
Of course he has to buy the dang thing first.
His previous car, now owned by another cowerker, was a 300ZX Twin Turbo.
Dual spools are a blast but only if both are working correctly. And
(deleted) was that a beast to work on. Everything crammed in so dang
tight there isn't even room to use a wrench someplaces.
--
DougW
> What I'd really like to do is put a modified roots type blower on an 8
> cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
> aspirated). I'm sure that would be more than a handful.
Considring my friend at work drives a BMW M5 with the 4.5 engine and
wants me to do the blower install... I'll let you know. :)
Of course he has to buy the dang thing first.
His previous car, now owned by another cowerker, was a 300ZX Twin Turbo.
Dual spools are a blast but only if both are working correctly. And
(deleted) was that a beast to work on. Everything crammed in so dang
tight there isn't even room to use a wrench someplaces.
--
DougW
#196
Guest
Posts: n/a
Re: More New Scrambler Details
Fred W. did pass the time by typing:
> What I'd really like to do is put a modified roots type blower on an 8
> cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
> aspirated). I'm sure that would be more than a handful.
Considring my friend at work drives a BMW M5 with the 4.5 engine and
wants me to do the blower install... I'll let you know. :)
Of course he has to buy the dang thing first.
His previous car, now owned by another cowerker, was a 300ZX Twin Turbo.
Dual spools are a blast but only if both are working correctly. And
(deleted) was that a beast to work on. Everything crammed in so dang
tight there isn't even room to use a wrench someplaces.
--
DougW
> What I'd really like to do is put a modified roots type blower on an 8
> cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
> aspirated). I'm sure that would be more than a handful.
Considring my friend at work drives a BMW M5 with the 4.5 engine and
wants me to do the blower install... I'll let you know. :)
Of course he has to buy the dang thing first.
His previous car, now owned by another cowerker, was a 300ZX Twin Turbo.
Dual spools are a blast but only if both are working correctly. And
(deleted) was that a beast to work on. Everything crammed in so dang
tight there isn't even room to use a wrench someplaces.
--
DougW
#197
Guest
Posts: n/a
Re: More New Scrambler Details
Fred W. did pass the time by typing:
> What I'd really like to do is put a modified roots type blower on an 8
> cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
> aspirated). I'm sure that would be more than a handful.
Considring my friend at work drives a BMW M5 with the 4.5 engine and
wants me to do the blower install... I'll let you know. :)
Of course he has to buy the dang thing first.
His previous car, now owned by another cowerker, was a 300ZX Twin Turbo.
Dual spools are a blast but only if both are working correctly. And
(deleted) was that a beast to work on. Everything crammed in so dang
tight there isn't even room to use a wrench someplaces.
--
DougW
> What I'd really like to do is put a modified roots type blower on an 8
> cylinder 4.5 liter BMW engine (which makes ~280 hp 320 ft/lbs normally
> aspirated). I'm sure that would be more than a handful.
Considring my friend at work drives a BMW M5 with the 4.5 engine and
wants me to do the blower install... I'll let you know. :)
Of course he has to buy the dang thing first.
His previous car, now owned by another cowerker, was a 300ZX Twin Turbo.
Dual spools are a blast but only if both are working correctly. And
(deleted) was that a beast to work on. Everything crammed in so dang
tight there isn't even room to use a wrench someplaces.
--
DougW
#198
Guest
Posts: n/a
Re: More New Scrambler Details
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F870C02.B410ED84@***.net...
> Hi Steve,
> I don't know anyone that runs an intercooler with a pump. It's not
> like Doug's pre heating the intake air through a two thousand degree
> exhaust.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
Umm, actually he is. When you compress the air it becomes hotter.
Thermodynamics and all that stuff...
-Fred
---
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#199
Guest
Posts: n/a
Re: More New Scrambler Details
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F870C02.B410ED84@***.net...
> Hi Steve,
> I don't know anyone that runs an intercooler with a pump. It's not
> like Doug's pre heating the intake air through a two thousand degree
> exhaust.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
Umm, actually he is. When you compress the air it becomes hotter.
Thermodynamics and all that stuff...
-Fred
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.516 / Virus Database: 313 - Release Date: 9/3/2003
#200
Guest
Posts: n/a
Re: More New Scrambler Details
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F870C02.B410ED84@***.net...
> Hi Steve,
> I don't know anyone that runs an intercooler with a pump. It's not
> like Doug's pre heating the intake air through a two thousand degree
> exhaust.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
Umm, actually he is. When you compress the air it becomes hotter.
Thermodynamics and all that stuff...
-Fred
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.516 / Virus Database: 313 - Release Date: 9/3/2003