Daimo B
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Registered: 20th Mar 00
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Now I read about these a few years ago and saw some videos, but how do they really work???
When in America they had a wicked program on SpeedTV called Pinks all out. Basically a drag racing comp for legal cars (good TV, wouldn't work here though  ) and a chap turned up in a Pontiac V8 with rear mounted turbo and standard everything else. It ran an 11.5 @ 110+ mph odd and stuffed a 500bhp V8 in the process.
Thing is turbos need spooling, so if the turbos mounted under the car right at the back where the tailpipe is, surley the lags awful? Or do you just get lag on small cc engines with big turbos (hence usless peak power instead of usable power). Do you get much lag with big V8 American engines?
PS, im converted, American SB and BB V8's are the way forwards for performance. None of this 2.0 rubbish lark. They were easily in the 9's and 10's where as us UK lot (in normal road cars) are happy to get in the 13/14s region 
So whats the score with these rear mounted turbos? Huge pipework needed, lag (well it didn't seem to have any). Pro's, cons???? Would they work in the UK as we have awful wet weather (hence turbos easily clogging up?)..
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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Oil and water supply is an issue to...
Seems a bloody stupid idea to me.
A small or big-block v8 out of the box will not do a 9 second 1/4, you have to throw a fuck load of money at it to get those kind of times.
[Edited on 21-09-2009 by DaveyLC]
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Daimo B
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Registered: 20th Mar 00
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But it works though, and a standard crappy low powered car running on, and running an 11 provs it does work....
Someone should try one on a LET corsa. Plenty of room if you remove the spare wheel well... 
They were doing 10's, altered diff ratio, some nitrous (ok 300bhp odd, but still the engines can take it in standard form), maybe some new cams, and boom high 10's......
[Edited on 21-09-2009 by VXR]
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jr
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Registered: 20th May 02
Location: Kent
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Its been for years sucessfully by well reknowned tuners davey
Daimo how have you just compared us drag racing, with there abindance of cheap un rusty v8 rwd cars to the uk which has neither
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DizzyRebel
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Registered: 2nd Jan 09
Location: Lincoln
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Its supposed to be less lag and more power than an intercooler setup as the pipes smaller diameter means you dont need to wait for the IC to fill and pressurise and the inlet track is smoother.
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Daimo B
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Registered: 20th Mar 00
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I know, it sucks.....
V8 muscle on idle, schulrp...
They had car auctions on TV too, complete restorations. I saw restored mustangs going for nearly $70,000-$100,000!! 
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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quote:
Originally posted by jr
Its been for years sucessfully by well reknowned tuners davey
Daimo how have you just compared us drag racing, with there abindance of cheap un rusty v8 rwd cars to the uk which has neither
I'm yet to see one thats reliable.. There is too much pressure loss running an oil feed from the engine to the rear of the car so they last about 5 minutes
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mattfiesta
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Registered: 14th Jul 05
Location: Nottinghamshire
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quote:
Originally posted by DaveyLC
quote:
Originally posted by jr
Its been for years sucessfully by well reknowned tuners davey
Daimo how have you just compared us drag racing, with there abindance of cheap un rusty v8 rwd cars to the uk which has neither
I'm yet to see one thats reliable.. There is too much pressure loss running an oil feed from the engine to the rear of the car so they last about 5 minutes
Seperate oil tank and pump mounted at the rear?
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Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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These big old V8s they do it to have about a billion ft lbs of torque from 500rpm so would imagine that helps the lag issue?
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DizzyRebel
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Registered: 2nd Jan 09
Location: Lincoln
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quote:
Originally posted by Adam_B
These big old V8s they do it to have about a billion ft lbs of torque from 500rpm so would imagine that helps the lag issue?
Its supposed to be less lag and more power than an intercooler setup as the pipes smaller diameter means you dont need to wait for the IC to fill and pressurise and the inlet track is smoother.
Of course the extra cubic capacity means the engine creates much more waste gas than a small cap engine so the turbos do spool up faster.
Most of the ones done properly run a separate oil feed and pump for the turbo and are pretty reliable.
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Eck
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Registered: 17th Apr 06
Location: Lundin Links, Fife
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I've got videos that I'll upload today of two BIG V8 monsters at Crail (Chevy Nova and Pontiac, see pics thread) that were running mid 13's all day The Go Kart would run rings around them 
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Novaneil
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Registered: 26th Oct 06
Location: Leamington Spa
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Balance motorsport sell kits and they have a 205 GTi demo car with one on. Read away....
http://www.balancemotorsport.co.uk/products.asp?subcategory=Rear+Mount+Turbocharging&category=Turbocharging
Neil
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Daimo B
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Registered: 20th Mar 00
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Eck, how much faster can you make the go-karts...
How much faster can you make the V8's 
Cheers Neil, i'll have a read of that 
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DizzyRebel
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Registered: 2nd Jan 09
Location: Lincoln
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V8's rule the drag strip. What do the top fuel ones run... 4 sec 1/4's at 300+ mph?
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Mertin
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Registered: 12th Oct 05
Location: Scotland
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I remember seeing something about a BMW with 2 turbos at the rear? Think someone posted it on here a while back
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Eck
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Registered: 17th Apr 06
Location: Lundin Links, Fife
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quote:
Originally posted by DizzyRebel
V8's rule the drag strip. What do the top fuel ones run... 4 sec 1/4's at 300+ mph?
And the cost of them...? I know the go kart will get hammered Daimo, and aye they are normally better for the drag strip because of the sheer size of the engine! The tolerances of the 2.0 turbo's etc we have mean that the engine won't be able to take much more power before going pop, so a fortune must be spent.
But there are certain motors over here that'll frighten all but the most RIDICULOUS drag cars (ie; Vauxhall Victor). Take Andy Forrest's Impreza for example, that can do insane times (and not on some poncey 2 speed or automatic 'box, a conventional, albeit straight cut, 6 speed! I think that's far more impressive that he can get a TINY engine compared to the V8's to do an 8 second quarter mile! I do love a great big lumpy V8 idle though
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Wrighty
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Registered: 28th Feb 04
Location: Howden
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quote:
Originally posted by VXR
PS, im converted, American SB and BB V8's are the way forwards for performance. None of this 2.0 rubbish lark.
once again proving you awesome knowledge of cars eh daimo
andy forest as eck says, got into the 8.s yesterday
the gobstopper, still a 2.0 and producing over 800hp. runs 8/9's all day long
your not going down the strip in under 9 seconds without spending a shit load of money anyway and even then youve got a be a good enough driver to put the car down there with gear changes and launches.
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Daimo B
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Registered: 20th Mar 00
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quote:
Originally posted by Wrighty
once again proving you awesome knowledge of cars eh daimo
andy forest as eck says, got into the 8.s yesterday
the gobstopper, still a 2.0 and producing over 800hp. runs 8/9's all day long
your not going down the strip in under 9 seconds without spending a shit load of money anyway and even then youve got a be a good enough driver to put the car down there with gear changes and launches.
Woooo in the 8's.......
Ahh yes, im fully aware of what goes on in Scotland on a sunday, when i've jsut returned to the UK, and are in the south east of England.....
How longs he taken to get it to the 8's.......
American cars can make 8's much easier.
Saucer of milk for your bitching?
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scottyp1989
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Registered: 29th Jul 07
Location: Warley, West Midlands
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pinks comes on the telly in this country aswell, there is a guy on passionford doing a rear mounted turbo on a KA
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Daimo B
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Registered: 20th Mar 00
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Really, whens it on?
On speed they ran them all the time there wasn't some racing on, so always got loads to watch.
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scottyp1989
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Registered: 29th Jul 07
Location: Warley, West Midlands
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not sure when its on but it comes on men & motors
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Half Pint
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Registered: 25th Mar 02
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Hmmm Turbo charged go kart.... how would i go about an enquiry for a small turbo ???
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DizzyRebel
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Registered: 2nd Jan 09
Location: Lincoln
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Speak to holeshot racing who build turbo kits for bikes.
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Wrighty
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Registered: 28th Feb 04
Location: Howden
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get a turbo busa engine in something like a dax rush mc...
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Paul_J
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Registered: 6th Jun 02
Location: London
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that program was on men and motors or motors tv a while back, I watched it... it was just loads of yanks arguing with each other about cheating etc.
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