The afr scale could do with being shortened....it seems to run rich around the two dips....12.2:1 although the graph scale makes it look worse than it actually is.
The afr scale could do with being shortened....it seems to run rich around the two dips....12.2:1 although the graph scale makes it look worse than it actually is.
I can show hundreds of power graphs and if it is a race engine, always dips and bumps. The small once you can never get rid off. With a bit of luck you can place them to other points by making the inlet track shorter or longer, playing with the exhaust 4-2-1 configuration etc... Only with relative soft cams you can get a nice ballon curve. But it's because softer cams have less of these things, the best cam will be the soft one.
Indeed, these small dips are not noticed while driving. But when the engine is long in low torque round 3000 RPM and it's a rally engine, it will feel smoother in short situations. I'm always concerned about the whole graph, not peak power only.
150KW / 240Nm I can not believe. This has no harmony in the calculation.
Question - how do these long stroke pinto's rev compared to a square or over square unit??
its got an 80mm stroke on emeralds rollers it was pulling like a train to 7500.
andy pipes which has an 86mm stroke and whilst it dont make any real power at such revs pulled smoothly round to 8700 on T+R's rollers, on track he is revving it to 8 all the time
rev wise the longer stroke doesnt seem to notice in either,
both have longer than std rods, although not massively, cant remember the length of 1600 diesel rods in the 2.2 but they are about 129mm, and andys has custom steel 131.5mm rods
Last edited by Graham; 18-08-2015 at 12:15.
As Graham said, it is on throttle bodies. Short 42mm Jenveys I think
This might help Graham
Both places I got it mapped both said the same thing, ref they thought it might be the exhaust system
At last, a worthwhile relevant statement and true
which is the same as above. Mines not a race car but I've never noticed it, thanks Graham
Cheers
Dazzle
So, I thought I would put these up....
The setup belongs to my friend who I might be joining/investing in his business
It's a DYNOmite hub dyno which has the ability to hold at set rev's and map for different load sites. An accurate good piece of kit.
That was with the Airbox
This was the glory run at the end with the airbox removed so you could hear it in full glory
Cheers
Dazzle
cool,
power at the wheels was still same as when it was on rollers over here so you havnt worn it out yet
Probably even better due to the difference in altitude levels!?
Was expecting it to be less so was pleased with that result
Cheers
Dazzle
Top Job lads What was the reason for the coolant pressurising?
There's a wee write up on this engine on the Emerald website: http://www.emeraldm3d.com/articles/oct2011/
hi graham is 40 hp loss through drive train correct here in australia we think 30 hp loss is more correct your ideas cheers mario.
depends on how much power it makes in the first place, not to mention whether rollers are single or twin, narrow tyres or wide sticky slicks, loosing 40bhp off 200 is 20%
Hi Graham,
Bit of a resurrection of an old thread, but I'd like to ask you a question regarding the big end side of the diesel conrod and it's bearings. I understand that the big end is about 1mm too wide and has to be machined smaller, but what's the score with the bearings. Do the new bearings that go with the diesel rods also need to be made smaller on their width, or do they still fit OK straight out of the box?
Thank you in advance for your advice.
bearings are ok straight out the box. you cant get 1600 diesel bearings any more though, but you can use 1800 ones, the only difference is 1800 ones dont have location tags, but they will work just fine
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