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The next step. More power!
- Thread starter Peter255
- Start date
Car is booked in for next week.
Once done i will get it on the same set of rollers i have used before to get some sort of comparison (bearing in mind different temps etc) and more importantly to get the fuelling checked.
If I can gain some more midrange and (maybe) some top end i will be happy. Then I will take stock as to whether i knock it on the head or get the engine out for proper wallet slaughter! :badgrin:
Cheers
Peter
Once done i will get it on the same set of rollers i have used before to get some sort of comparison (bearing in mind different temps etc) and more importantly to get the fuelling checked.
If I can gain some more midrange and (maybe) some top end i will be happy. Then I will take stock as to whether i knock it on the head or get the engine out for proper wallet slaughter! :badgrin:
Cheers
Peter
I think a RR session is definately needed as soon as i get the car back. Driving anything even vaguely sporty after my hire car experience today will seem like a raging beast! Unfortunately making any human comparisons before and after the work rather difficult. [smilie=doubt.gif]
I currently have 1.2ltr 16v wheeeeeeeeeeeeeeeeezy corsa POWER! :badgrin:
And it has the handling characteristics of a drunken man on a bicycle. What fun! :badgrin:
Peter
I currently have 1.2ltr 16v wheeeeeeeeeeeeeeeeezy corsa POWER! :badgrin:
And it has the handling characteristics of a drunken man on a bicycle. What fun! :badgrin:
Peter
Monkey":2yttjbjh said:
Don't worry it has been throughly ragged :badgrin: , but frankly it makes little difference. After a while i gave up and slipped into cruise mode as it was a ultimately pointless. Its always going to be slow and sh1t. :evil:
Looking forward to tomorrow! [smilie=icon_cheers.gif]
Peter
The car is booked in for next wednesday after work (the soonest evening / weekend time they had) at the same rolling road i have used before.
Fingers crossed for some gains.
I'll post up any feedback (and hopefully some pictures) this evening when i get back from picking the car up.
Cheers
Peter
Fingers crossed for some gains.
I'll post up any feedback (and hopefully some pictures) this evening when i get back from picking the car up.
Cheers
Peter
I don't have figures, and i'm sure Ben would be a little secretive about too much detail. :wink:
From what i have been told / and can see he has smoothed out the surfaces and matched up the points where the various parts of the plenum meet each other and the head. This will prevent the flow being disturbed at the interface between the components. Material is removed from some but not all areas as bigger is not always better.
Looking forward to the RR test tomorrow, but i'm wondering about the effect on the map. [smilie=doubt.gif]
Peter
From what i have been told / and can see he has smoothed out the surfaces and matched up the points where the various parts of the plenum meet each other and the head. This will prevent the flow being disturbed at the interface between the components. Material is removed from some but not all areas as bigger is not always better.
Looking forward to the RR test tomorrow, but i'm wondering about the effect on the map. [smilie=doubt.gif]
Peter
Don't you just love NA tuning! 
I have gained a whole 0.5BHP right at the top end.
The AFR rising (LEANER) from mid to high revs by around 0.5 average. Which makes sense as its getting a bit more air and thus needs a bit more fuel.
Woo Hoo!
Needs some time with the mappers to ensure this is not a complete waste of time.
At least you can all learn from my mistakes! Its a service to the community. [smilie=doubt.gif]
Peter
I have gained a whole 0.5BHP right at the top end.
The AFR rising (LEANER) from mid to high revs by around 0.5 average. Which makes sense as its getting a bit more air and thus needs a bit more fuel.
Woo Hoo!
Needs some time with the mappers to ensure this is not a complete waste of time.
At least you can all learn from my mistakes! Its a service to the community. [smilie=doubt.gif]
Peter
James":3jmor1wv said:
LOL. No, the RR's are notoriously inaccurate! Thats just what the figure was.
Its running fine James. Its basically thus far made feck all difference, except running a little leaner.
If before the AFR was optimum its now different (higher or leaner) so there should be some more power to come. I just have no idea how much. 2BHP or 10BHP?
Who knows? [smilie=doubt.gif]
Peter
As with anything Peter it's all complimentary ... You may need to do other things to release the full gains ... Increasing the flow capacity in your cylinder head may have hit a bottleneck elsewhere or the cylinder head may not have been the bottlenck to begin with ... Everything you do to improve flow through the engine on the induction and exhaust side adds a small increment though - it's the old addage 'power is just a question of money, how much power do you want'.
With your exhaust, head work and ECU upgrades you are a long way down the road and are seeing improvements all the time. How are you for cam's and induction BTW ?
Martin
With your exhaust, head work and ECU upgrades you are a long way down the road and are seeing improvements all the time. How are you for cam's and induction BTW ?
Martin
You would no doubt see more gains once you start fiddling with the cylinder head Peter. Really, that is how the manifold should have looked to begin with. The only real difference being it is now matched to the ports etc. Ive had cylinder heads on flowbenches countless times and its suprising what works and what doesn't. Tim is right about the old skool way. It is still the best in my opinion and in general, bigger is better BUT at the sacrifice of low end grunt. Its finding the happy medium between sweet running stock motor and a slightly lumpier sport motor.
