My top end rebuild begins - First step, dynoed the car today to get the baseline
08-26-2009, 04:31 AM
#1
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Thread Starter
My top end rebuild begins - First step, dynoed the car today to get the baseline
Hey guys,
In light of my top end rebuild plans for this winter, I dynoed the car this morning.
I got a solid 279,4hp and 337Nm (248lbs ft) at the flywheel (Corrected). The power at wheels was 250hp.
The only changes related to the motor are Dach-x pipe, RSR mufflers and RS airbox.
Looking at the torque curve you can clearly see that the car is running lean. Even more so when we did a re-run without the air filter (the curve was even choppier and peak power was down to 270hp).
It is clear that the standard ECU cannot adapt well to the better airflow (airbox & exhaust).
My tuner who has 20+ years of experience in building the fastest rally and road race car engines in Finland (even factory teams like Toyota and Honda use his services at times), said he could get 300 crank hp out of the car with just Motec and some time on the dyno.
It will be interesting to see if my top end rebuild really gets out of hands and what will be the end result… =)
Stay tuned!
Juha
In light of my top end rebuild plans for this winter, I dynoed the car this morning.
I got a solid 279,4hp and 337Nm (248lbs ft) at the flywheel (Corrected). The power at wheels was 250hp.
The only changes related to the motor are Dach-x pipe, RSR mufflers and RS airbox.
Looking at the torque curve you can clearly see that the car is running lean. Even more so when we did a re-run without the air filter (the curve was even choppier and peak power was down to 270hp).
It is clear that the standard ECU cannot adapt well to the better airflow (airbox & exhaust).
My tuner who has 20+ years of experience in building the fastest rally and road race car engines in Finland (even factory teams like Toyota and Honda use his services at times), said he could get 300 crank hp out of the car with just Motec and some time on the dyno.
It will be interesting to see if my top end rebuild really gets out of hands and what will be the end result… =)
Stay tuned!
Juha
Last edited by Juha G; 08-26-2009 at 05:50 AM.
08-26-2009, 10:39 AM
#3
King of Cool
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Interesting to see what those Audi guys can do!
(I assume it's that place?)
So you're gonna do just top rebuild with the Motec'ing or let them go little "deeper" (RS cams, intake valves)? Or even more?
Do a leakdown test before you tear it apart. Once apart, check the rings & cylinders, to make sure it's all OK there and if not, did I hear 3.8 or 4.0?
(I assume it's that place?)
So you're gonna do just top rebuild with the Motec'ing or let them go little "deeper" (RS cams, intake valves)? Or even more?
Do a leakdown test before you tear it apart. Once apart, check the rings & cylinders, to make sure it's all OK there and if not, did I hear 3.8 or 4.0?
08-26-2009, 11:17 AM
#4
Rennlist Member
Thread Starter
It's a small one man company (has allways been), the guy belongs to the best of the best in Finland.
So you're gonna do just top rebuild with the Motec'ing or let them go little "deeper" (RS cams, intake valves)? Or even more?
Do a leakdown test before you tear it apart. Once apart, check the rings & cylinders, to make sure it's all OK there and if not, did I hear 3.8 or 4.0?
Do a leakdown test before you tear it apart. Once apart, check the rings & cylinders, to make sure it's all OK there and if not, did I hear 3.8 or 4.0?
9meister billet heds, cams etc. are very very tempting.
For sure I'll do a leak down and compression before I take it apart and then all the checks when it is apart.
3.8 no questions asked if c/p need to be replaced...
08-26-2009, 11:20 AM
#5
King of Cool
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No, not LMS, this is the place where LMS brings their cars when they run out of talent. Really!
It's a small one man company (has allways been), the guy belongs to the best of the best in Finland.
My number one goal is to replace the valve guides, secondary object is to squeeze some additional power out of the engine while I'm there.
9meister billet heds, cams etc. are very very tempting.
For sure I'll do a leak down and compression before I take it apart and then all the checks when it is apart.
3.8 no questions asked if c/p need to be replaced...
It's a small one man company (has allways been), the guy belongs to the best of the best in Finland.
My number one goal is to replace the valve guides, secondary object is to squeeze some additional power out of the engine while I'm there.
9meister billet heds, cams etc. are very very tempting.
For sure I'll do a leak down and compression before I take it apart and then all the checks when it is apart.
3.8 no questions asked if c/p need to be replaced...
Keep us posted.
08-26-2009, 11:20 AM
#6
Rennlist Member
cool, should be entertaining.
Not sure there would be a measureable HP gain from a straightforward top end refresh but it sounds like this won't be your usual refresh.
I have seen a big change in emmissions, before and after... but that is no fun. 9m heads... now that's fun
Not sure there would be a measureable HP gain from a straightforward top end refresh but it sounds like this won't be your usual refresh.
I have seen a big change in emmissions, before and after... but that is no fun. 9m heads... now that's fun
08-26-2009, 01:32 PM
#7
Nordschleife Master
I think part of the reason you lost HP with out the air filter is the MAF. The air filter smoothes the air flow through the MAF, when you remove it, you get turbulent air through the MAF & it gets confused, then you loose power.
If you go distrubitorless with MoTec I can see you picking up some good top end, & way more torque.
If you go distrubitorless with MoTec I can see you picking up some good top end, & way more torque.
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08-26-2009, 02:26 PM
#8
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For an engine of this specification there will be no advantage to running a distributorless ignition system. Larger injectors, high flow air filter, MAP sensor + Motec on the stock ignition will be all you need to easily eclipse 300hp.
This will be interesting to watch, keep us up to date on every step!
02-21-2010, 04:14 PM
#14
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Thread Starter
Time to update the thread.
I ended up finding out the reason for the oil burning. It's a little bit embarrassing but everything points out to having too much oil in the sump. (i.e. user error).
So instead of pulling the heads out, I have focused on the following for this winter:
1. Motec conversion (+300hp is the target)
2. Brake caliber rebuild (all four)
3. RS carpet kit installation
4. Rear shock top mount replacement
5. Refinish my BBS LM street wheels
6. Custom RS style door panels
7. Stereo replacement. My Nakamichi swallowed one of my Metallica CDs...
8. Light weight speakers on RS door panels
9. Repaint rear bumber
10. Add 200cell metallic sport cats on the DACH cat bypass pipe (noise and emission reasons)
We will make a custom adapter loom for the motec so that I can swap between the standard ECU and Motec just plug n play. (this is important for the yearly inspection we have to take our cars to in Finland, no error codes etc.)
Sorry to dissapoint you as you were all expecting to see some photos and write ups of the head job...
I'll keep this updated as I progress (nothing really finished yet).
Cheers!
Juha
Ps. 9m....next winter....
I ended up finding out the reason for the oil burning. It's a little bit embarrassing but everything points out to having too much oil in the sump. (i.e. user error).
So instead of pulling the heads out, I have focused on the following for this winter:
1. Motec conversion (+300hp is the target)
2. Brake caliber rebuild (all four)
3. RS carpet kit installation
4. Rear shock top mount replacement
5. Refinish my BBS LM street wheels
6. Custom RS style door panels
7. Stereo replacement. My Nakamichi swallowed one of my Metallica CDs...
8. Light weight speakers on RS door panels
9. Repaint rear bumber
10. Add 200cell metallic sport cats on the DACH cat bypass pipe (noise and emission reasons)
We will make a custom adapter loom for the motec so that I can swap between the standard ECU and Motec just plug n play. (this is important for the yearly inspection we have to take our cars to in Finland, no error codes etc.)
Sorry to dissapoint you as you were all expecting to see some photos and write ups of the head job...
I'll keep this updated as I progress (nothing really finished yet).
Cheers!
Juha
Ps. 9m....next winter....
02-21-2010, 04:34 PM
#15
Rennlist Member
Sounds like a great build in the making. Nice work Juha.
