The not so common A45 AMG

[TheAllSeeingPie]

JockySteer said:

I'd be interested to see what it pulls to 155 though if you've done it? I've done a couple of runway blasts and got between 28-29 seconds both times. I think we could be close!

I'd guess around 19-22 seconds since his 0-124 is 13ish seconds, shown on his vbox pics. I've had runs of around 20secs and I'm running around 700bhp in a E55 and his 0-100 time is similar as well as his 1/4 mile.

I'm following these mods quite closely as I'm thinking of getting a CLA45 shooting brake and want it to be properly rapid.

[ecain63]

TheAllSeeingPie said:

JockySteer said:

I'd be interested to see what it pulls to 155 though if you've done it? I've done a couple of runway blasts and got between 28-29 seconds both times. I think we could be close!

I'd guess around 19-22 seconds since his 0-124 is 13ish seconds, shown on his vbox pics. I've had runs of around 20secs and I'm running around 700bhp in a E55 and his 0-100 time is similar as well as his 1/4 mile.

I'm following these mods quite closely as I'm thinking of getting a CLA45 shooting brake and want it to be properly rapid.

Having looked at the vbox graphs the A45 is running circa 26s to 155mph. The time taken from 130 to 155 is pretty long owing to the small capacity of the engine and gearing biassed toward sprints to 120 or so. Give the car another 500cc or 1000cc and you'd see a good increase in high end grunt.

Another factor is that by the time you get to 130mph+ the turbo is pretty hot and power will be starting to ebb away. Had this been the 6.2V8 NA engine you wouldn't have these effects. Stage 3 tuning when it comes will see improved cooling for the turbo to help in these areas. Other Stage 3 A45's with additional cooling are already seeing much lower temps in the turbo. For cold weather runs the A45s with additional cooling are seeing really sharp spikes in turbo performance.

Eddie

[HerrNipps]

An excellent thread, I was starting to think this section was all old and ordinary cars.

Danke

[AntiLagGC8]

ecain63 said:

TheAllSeeingPie said:

JockySteer said:

I'd be interested to see what it pulls to 155 though if you've done it? I've done a couple of runway blasts and got between 28-29 seconds both times. I think we could be close!

I'd guess around 19-22 seconds since his 0-124 is 13ish seconds, shown on his vbox pics. I've had runs of around 20secs and I'm running around 700bhp in a E55 and his 0-100 time is similar as well as his 1/4 mile.

I'm following these mods quite closely as I'm thinking of getting a CLA45 shooting brake and want it to be properly rapid.

Having looked at the vbox graphs the A45 is running circa 26s to 155mph. The time taken from 130 to 155 is pretty long owing to the small capacity of the engine and gearing biassed toward sprints to 120 or so. Give the car another 500cc or 1000cc and you'd see a good increase in high end grunt.

Another factor is that by the time you get to 130mph+ the turbo is pretty hot and power will be starting to ebb away. Had this been the 6.2V8 NA engine you wouldn't have these effects. Stage 3 tuning when it comes will see improved cooling for the turbo to help in these areas. Other Stage 3 A45's with additional cooling are already seeing much lower temps in the turbo. For cold weather runs the A45s with additional cooling are seeing really sharp spikes in turbo performance.

Eddie

As ever Eddie, good post. I love the quality information you keep adding to this thread.

I was also surprised to see that the new STi doing the Isle of man run still suffers from the same cooling issues at high speeds although presumably Subaru didn't design the car for constant high speed runs. The STi was losing a lot of power running constantly at high speeds the various news articles suggested.

http://www.autocar.co.uk/blogs/anything-goes/isle-...

I hope you're doing well on the health front.

[TheAllSeeingPie]

ecain63 said:

Having looked at the vbox graphs the A45 is running circa 26s to 155mph. The time taken from 130 to 155 is pretty long owing to the small capacity of the engine and gearing biassed toward sprints to 120 or so. Give the car another 500cc or 1000cc and you'd see a good increase in high end grunt.

Another factor is that by the time you get to 130mph+ the turbo is pretty hot and power will be starting to ebb away. Had this been the 6.2V8 NA engine you wouldn't have these effects. Stage 3 tuning when it comes will see improved cooling for the turbo to help in these areas. Other Stage 3 A45's with additional cooling are already seeing much lower temps in the turbo. For cold weather runs the A45s with additional cooling are seeing really sharp spikes in turbo performance.

Eddie

That really is quite a surprise. Is the turbo air to air or air to water for the charge cooling? Maybe you could run a larger coolant reservoir? I'm guessing the turbo itself is oil cooled which makes keeping it cool a pain?

[ecain63]

TheAllSeeingPie said:

ecain63 said:

Having looked at the vbox graphs the A45 is running circa 26s to 155mph. The time taken from 130 to 155 is pretty long owing to the small capacity of the engine and gearing biassed toward sprints to 120 or so. Give the car another 500cc or 1000cc and you'd see a good increase in high end grunt.

Another factor is that by the time you get to 130mph+ the turbo is pretty hot and power will be starting to ebb away. Had this been the 6.2V8 NA engine you wouldn't have these effects. Stage 3 tuning when it comes will see improved cooling for the turbo to help in these areas. Other Stage 3 A45's with additional cooling are already seeing much lower temps in the turbo. For cold weather runs the A45s with additional cooling are seeing really sharp spikes in turbo performance.

Eddie

That really is quite a surprise. Is the turbo air to air or air to water for the charge cooling? Maybe you could run a larger coolant reservoir? I'm guessing the turbo itself is oil cooled which makes keeping it cool a pain?

The current cooling upgrade is currently in the form of an additional front mounted radiator / cooler that basically allows an extra 1 or 2 litres of coolant to flow through the system. Temps are down by a few degrees under load which will help no end. The turbo itself (i believe) is an inline oil fed turbo that uses the same oil system as the engine. It is very effective as it has a very good charge cooler (which we have talked about making bigger or making multiple of in one system) but if they do decide to spit their internals they tend to force the metalwork through the rest of the engine. Luckily turbo failures are rare now thanks to a recall on a bad batch early on and regular checks on cars coming in for service. The big flaw safety wise with the inline oil system is down to brand performance competition and AMG's mission to be the most powerful out there. To keep the oil flow rate high and temps down they had to reduce the amount of oil filtration and as the oil circulates only a percentage of oil is siphoned off and filtered by a small catch rather than the whole volume going through a large and restrictive filter every time it passes through the engine or turbo. It keeps the oil clean if everything stays in one piece, but if it all goes pop...............

Eddie

[renorti]

0-100mph in 8 and a half seconds! I think that is pretty awesome, excellent tuned little mercedes.

[keith2.2]

That looks like an utter hooligan - I love it.

[ecain63]

Just a small mod at this point.

2kg off each corner thanks to Linea Corse LC818's and new Yoko track and road rubber.



Coming next. Massive weight savings and stopping power with this front and rear brake upgrade (keeping red calipers):



Eddie

[Beedub]

wicked looking thing!!

[5potTurbo]

^^^ Those discs look like something from 007!
(not the AM LPM1 car!)

[ecain63]

5potTurbo said:

^^^ Those discs look like something from 007!
(not the AM LPM1 car!)

Sure! If they fail to work they could have a second role as a throwing disc!

[CorvetteConvert]

What about a set of 18 or even 17 inch wheels?
My track Cayman went from 19s to 17s and i saved quite a bit of weight, weight being taken from the best possible place to lose it, too and the ride was overnight miles better.

[chuntington101]

What part of the Stage 3 upgrade? guessing a larger low temp rad for the chargecooler and a beefier pump.

I don't wonder why MB are soo insistent on using chargecoolers rather than air to water intercoolers. I adds a lot of weight and complexity to a system. Dose anyone do a chargecooler delete option for these?

[hondafreek]

Wonderful looking thing, love the new wheels, really suit it. Might be able to afford one in 10 years.

[ecain63]

CorvetteConvert said:

What about a set of 18 or even 17 inch wheels?
My track Cayman went from 19s to 17s and i saved quite a bit of weight, weight being taken from the best possible place to lose it, too and the ride was overnight miles better.

17's won't fit the stock brakes let alone the upgrades and doubt the 18's will accept the upgrades. New rotors and pads save 25kg total

[ecain63]

chuntington101 said:

What part of the Stage 3 upgrade? guessing a larger low temp rad for the chargecooler and a beefier pump.

I don't wonder why MB are soo insistent on using chargecoolers rather than air to water intercoolers. I adds a lot of weight and complexity to a system. Dose anyone do a chargecooler delete option for these?

Don't think this is an option yet, if at all. The A45 is still a young platform and any new mod released really is new territory. Give it time!

[ecain63]

hondafreek said:

Wonderful looking thing, love the new wheels, really suit it. Might be able to afford one in 10 years.

Facelift arrives in Q3 so you may see pre-facelifts drop soon

[TheAllSeeingPie]

ecain63 said:

chuntington101 said:

What part of the Stage 3 upgrade? guessing a larger low temp rad for the chargecooler and a beefier pump.

I don't wonder why MB are soo insistent on using chargecoolers rather than air to water intercoolers. I adds a lot of weight and complexity to a system. Dose anyone do a chargecooler delete option for these?

Don't think this is an option yet, if at all. The A45 is still a young platform and any new mod released really is new territory. Give it time!

I thought a charge cooler was an air to water intercooler? With an air to air being referred to colloqually as just an intercooler?

[ecain63]

TheAllSeeingPie said:

ecain63 said:

chuntington101 said:

What part of the Stage 3 upgrade? guessing a larger low temp rad for the chargecooler and a beefier pump.

I don't wonder why MB are soo insistent on using chargecoolers rather than air to water intercoolers. I adds a lot of weight and complexity to a system. Dose anyone do a chargecooler delete option for these?

Don't think this is an option yet, if at all. The A45 is still a young platform and any new mod released really is new territory. Give it time!

I thought a charge cooler was an air to water intercooler? With an air to air being referred to colloqually as just an intercooler?

Too technical for me. I just drive it and buy the bits. lol