mark chandler
|
| posted on 25/7/11 at 04:09 PM |
|
|
Here's my graph, sticking a turbo straight on to a 919 blade engine, no mods to the engine itself beyond lockup clutch running 7psi.
These are £400 - £500 motors.
The induction includes EFI and a spent a bit of time making the manifolds etc out of scrap.
|
|
|
|
|
coyoteboy
|
| posted on 25/7/11 at 04:27 PM |
|
|
Those are nice curves Mark (ooh err!) - do you mind if I ask how long that engine/box has lasted so far? What's the lockup clutch for and what
sort of price?
|
|
|
mark chandler
|
| posted on 25/7/11 at 10:27 PM |
|
|
Current engine 4 track days, on the rolling road it made no nasty noises ands seems as good as gold, bit smokey on the overrun but it is 14 years
old.
Previous engine was a £350 bay special, unknown to me the previous owner had frost cracked the block and glued up  still I get a complete spare set
of everything.
Clutch started out with big springs, once I crept above ~180bhp it started to slip so had a lockup made by pyscle worxs
www.psycleworkz.com which cost me £400 as it was the first one he
did for these engines, £155 now although you will need a spacer for the cover so talk to anywide7.
Latest extras are oil cooler and acusump, although I do change the oil for every outing, halfords semi syn.
Regards Mark
|
|
|
Bare
|
| posted on 26/7/11 at 02:12 AM |
|
|
Interesting Curve indeed.
A well engineered & executed boost/power curve shows TQ output at equal to or even slightly more than Hp .
Yours is at 1/2... Somethings apparently not even near to the potential.
But as you say, it IS a Cheap setup :-) Tough to complain at beer pricings
|
|
|
Bare
|
| posted on 26/7/11 at 02:16 AM |
|
|
quote:
Originally posted by daviep
Regardless of what you think the TD04 has been used succesfully many times on bike engines although it is usually 1000cc plus engines.
One of the nice benefits is that compressor and turbine housings and CHRA be orientated to any position to aid packaging.
Davie
Hey! Compressor maps Don't Lie .. All one has to do is read them.
Everyone is entitled to their own view of the world.. it's what makes it interesting :-)
|
|
|
mark chandler
|
| posted on 26/7/11 at 10:35 PM |
|
|
Its only a 900cc engine, bike engines have a lot less torque than car engines of twice the CC's of 2litre engines, I guess torque is related to
the leverage on the crank so 1/2 the throw = half the torque in this instance ?
That aside, no decomp plate and no nasty noises @ 7psi, I could increase this but suspect a collection of broken parts would follow.
|
|
|
SausageArm
|
| posted on 26/7/11 at 10:39 PM |
|
|
You cant knock those power/torque figures Mark, impressive considering it's a simple bolt on and run setup, how does she feel to drive?
|
|
|
MikeRJ
|
| posted on 27/7/11 at 12:01 AM |
|
|
quote:
Originally posted by Bare
Interesting Curve indeed.
A well engineered & executed boost/power curve shows TQ output at equal to or even slightly more than Hp .
Yours is at 1/2... Somethings apparently not even near to the potential.
But as you say, it IS a Cheap setup :-) Tough to complain at beer pricings
Sorry to be blunt, but this is rubbish. You do realise that bike engines rev far higher than car engines, and that power is a function of torque and
RPM? How would you propose to get 200+lbft and 200bhp out of a 900cc engine on standard internals? Who defined this arbitrary rule that peak torque
must be equal or greater than the peak power?
|
|
|
daviep
|
| posted on 27/7/11 at 07:10 AM |
|
|
quote:
Originally posted by Bare
quote:
Originally posted by daviep
Regardless of what you think the TD04 has been used succesfully many times on bike engines although it is usually 1000cc plus engines.
One of the nice benefits is that compressor and turbine housings and CHRA be orientated to any position to aid packaging.
Davie
Hey! Compressor maps Don't Lie .. All one has to do is read them.
Everyone is entitled to their own view of the world.. it's what makes it interesting :-)
That is very true, but a compressor map on it's own tells you nothing useful, you also need all the relevant details of the engine to be able to
work out the air demand.
Davie
“A truly great library contains something in it to offend everyone.”
|
|
|
phelpsa
|
| posted on 27/7/11 at 03:29 PM |
|
|
quote:
Originally posted by Bare
Interesting Curve indeed.
A well engineered & executed boost/power curve shows TQ output at equal to or even slightly more than Hp .
Yours is at 1/2... Somethings apparently not even near to the potential.
But as you say, it IS a Cheap setup :-) Tough to complain at beer pricings
Only if torque dies off dramatically past about 5500rpm.... these are bike engines that will rev to 12k+.
|
|
|
