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Landcruiser Colorado 90 series 3" turboback Exhaust .
- Thread starter Shayne
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Looks good Shane, is there any improvement?, sound, .gas flow etc.
Andy
Andy
silvercruiser
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Nice. and just think he will be eating some of lincomb mud for tea.
Tidy install, has it got 3" dump pipe now then?
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Nice one Shayne, you won't regret having that made up.
Looks a tidy job and I'll bet it sounds just grrrrrrrreat! Do you know the wall thickness of the steel?
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Looks to me the dump pipe is still in place and if you look at the 4th pic the new pipework tapers up to 3" off it , though i could be wrong we have had torrential rain since i collected the truck so my first look underneath was 5 minutes to take the pics .
How to describe the improvement ?
Forgive me but the only word i can think of to describe the sound is "Subaru" , sorry but i can think of nothing else that i might compare to . I was astonished by how civilized the exhaust note is while cruising on the open road , but a touch of throttle produces a very deep growl .
Performance is equally hard to explain .
The turbo is no longer an occasional booster for the engine , the power is there all of the time at any time , regardless of speed or revs wiggle your toe on the accelerator and the truck responds . Again i am astonished how civilized the obvious power gain presents itself , acceleration was always good on my truck but it was blatantly obvious when the turbo cut in . Now power delivery is smooth from one gear to the next . Adding to this engine braking has mellowed a lot which again smooths everything out nicely .
All in all i cannot praise Charlie at Prospeed enough , i genuinely felt he was personally pleased with his own success while at the same time being unnecessarily concerned that i wouldn't be as pleased as him with the results .
If your reading this Charlie and you still have any doubts please be assured i would recommend Prospeed to anyone , the results are astonishing and worth every penny
How to describe the improvement ?
Forgive me but the only word i can think of to describe the sound is "Subaru" , sorry but i can think of nothing else that i might compare to . I was astonished by how civilized the exhaust note is while cruising on the open road , but a touch of throttle produces a very deep growl .
Performance is equally hard to explain .
The turbo is no longer an occasional booster for the engine , the power is there all of the time at any time , regardless of speed or revs wiggle your toe on the accelerator and the truck responds . Again i am astonished how civilized the obvious power gain presents itself , acceleration was always good on my truck but it was blatantly obvious when the turbo cut in . Now power delivery is smooth from one gear to the next . Adding to this engine braking has mellowed a lot which again smooths everything out nicely .
All in all i cannot praise Charlie at Prospeed enough , i genuinely felt he was personally pleased with his own success while at the same time being unnecessarily concerned that i wouldn't be as pleased as him with the results .
If your reading this Charlie and you still have any doubts please be assured i would recommend Prospeed to anyone , the results are astonishing and worth every penny
Beau
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Looks good shayne, although I have heard the most restrictive parts of these trucks exhaust system is the down pipe, so surely it's worth the investment on a custom one of those? For maximum gains I would have also poked out the exhaust in front of the rear tyre so that it doesn't go over the axle (restricting?), just my thoughts anyway...
Looks good, may I ask how much it cost you? I wish I had the tools and equipment to make these pipes, I can weld! Would make all you guys one
Looks good, may I ask how much it cost you? I wish I had the tools and equipment to make these pipes, I can weld! Would make all you guys one
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From what i can gather Beau the dump pipe cannot be removed while the gearbox is in , so if i ever have the gearbox out for other reasons that will be addressed at the same time . Regardless of the dump pipe the improvement is obvious . I have to wonder if a 3" dump will actually improve anything though , the turbo itself is not 3" and the dump pipe might be viewed as a short extension of the turbo , but i guess we will never know until somebody actually swaps it .
To exit in front of the rear wheel i would have to either remove the sidesteps or go under them which for me is not an option , under it loses ground clearance when off-road , and i don't like the look of the truck with sidesteps removed . I will eventually get sliders but i intend to keep them looking as close as possible to the original step .
Gary there is no "noise" , it's hard to explain , my neighbours won't be complaining , if i drive around town nobody actually turns and looks to see whats coming because of the sound , what i do see is curious looks from guys who i have to assume recognize (or at least think they do) the sound of a tuned engine .
Be warned though my mpg is definitely going to suffer until the new toy syndrome wears off a bit because my driving is now atrocious , i just can't help slowing down so i can give it a boot full of throttle so i can hear that muted roar but even when i do that the occasional looks that come my way are of idle curiosity rather than frowning annoyance .
I fitted a K&N air filter yesterday and while the jury is still out on whether or not it improved performance in any way (waiting for Helen's non bias review) I definitely think it compliments the exhaust by making its very deep tone perhaps slightly more obvious .
The final parts for my intercooler have just arrived
Zorst was £480 by the way after vat , dropped truck off at 10am and was asked to collect at 4.30pm .
To exit in front of the rear wheel i would have to either remove the sidesteps or go under them which for me is not an option , under it loses ground clearance when off-road , and i don't like the look of the truck with sidesteps removed . I will eventually get sliders but i intend to keep them looking as close as possible to the original step .
Gary there is no "noise" , it's hard to explain , my neighbours won't be complaining , if i drive around town nobody actually turns and looks to see whats coming because of the sound , what i do see is curious looks from guys who i have to assume recognize (or at least think they do) the sound of a tuned engine .
Be warned though my mpg is definitely going to suffer until the new toy syndrome wears off a bit because my driving is now atrocious , i just can't help slowing down so i can give it a boot full of throttle so i can hear that muted roar but even when i do that the occasional looks that come my way are of idle curiosity rather than frowning annoyance .
I fitted a K&N air filter yesterday and while the jury is still out on whether or not it improved performance in any way (waiting for Helen's non bias review) I definitely think it compliments the exhaust by making its very deep tone perhaps slightly more obvious .
The final parts for my intercooler have just arrived
Zorst was £480 by the way after vat , dropped truck off at 10am and was asked to collect at 4.30pm .
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When Charlie did a 3" on my 80 I asked for it to be no noisier than standard and what I got was perfect, no noisier but with a deeper tone, every time I go through a tunnel I have to lower the window just to listen to that throaty rumble which seems to have got better with a coating of coke on the inside.
Charlie obviously doesn't remember you Chaz , i mentioned your name and he said "he's mad him" i said no we must be talking about different people
He was probably remembering all the dents and scrapes.
Beau
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I think you need to see the standard Dump pipe to understand how restrictive it actually is and very small, they say on a turbo car you can never have a "big enough" exhaust....and then theres always the argument over back pressure and stuff....
I think a increase at the fuel pump would now show good gains as the hot gasses can exit faster
I think a increase at the fuel pump would now show good gains as the hot gasses can exit faster
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I would certainly like to have changed the dump pipe as well Beau , what i meant was i find it hard to believe there can be much improvement at all above and beyond what Charlie at Prospeed has achieved already with the exhaust . The fuel will be tweaked .
Anyway the jury is back with the verdict about K&N air filters . Helen drove the truck after the new exhaust was fitted and was very impressed . Tonight she drove it again for the first time since without knowing the filter might change anything . I have just had a text asking what i have done ! , she says (and its very unlike Helen to admit such a thing) she found it frightening to drive coz it feels like she won't be able to stop in time
30 odd quid on ebay - get one 
Anyway the jury is back with the verdict about K&N air filters . Helen drove the truck after the new exhaust was fitted and was very impressed . Tonight she drove it again for the first time since without knowing the filter might change anything . I have just had a text asking what i have done ! , she says (and its very unlike Helen to admit such a thing) she found it frightening to drive coz it feels like she won't be able to stop in time
30 odd quid on ebay - get one
When Charlie did a 3" on my 80 I asked for it to be no noisier than standard and what I got was perfect, no noisier but with a deeper tone, every time I go through a tunnel I have to lower the window just to listen to that throaty rumble which seems to have got better with a coating of coke on the inside.
My missus is always complaining, "why do we have to have the window down in the tunnels?" I just can't resist!
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I wish i could explain the sound its not loud its just different , think i will get a youngster to help me upload a vid .
fridayman
Well-Known Member
The exhaust looks good. "Turbo back" includes the dump pipe though. It is apparently possible to get the dump pipe off without removing the gearbox, but I couldn't do it in 3 attempts - I think the exhaust place magicked mine off when I had my exhaust fitted.
