Stand Alone Ecu, Expensive Mapping Nope! Not A Thing

[peter 20]

Basicaly my mate has bolted a m45 supercharger to his puma engined fiesta swapped pulleys aroud to get 7psi, and has done nothing else! only a wide band lambda afr gauge to watch the AFRs which are ok roughly 10.5-1 to 11-1.

 

He put it on a dyno at sant a pod and it made 210hp running a 14 second 1/4 with a 25mph head wind (quicker than m3s on the day)

 

Then 217hp with a rich nitrous setup.

 

Just to stress the ecu, mapping, and fuel pressure is totaly un-modified!

 

pretty impressive!

[dcc 855]

Sounds like a bit of a bodge.

[peter 20]

it is thats the point!!! but it works....

[M@tt 77]

i can understand how that can work as surely basic engine physics states "more air in = more fuel required" otherwise it would be running massively lean. Unless the ecu is smart enough to self map prehaps? but i'm guessing not.

[205_sunderland 4]

i can understand how that can work as surely basic engine physics states "more air in = more fuel required" otherwise it would be running massively lean. Unless the ecu is smart enough to self map prehaps? but i'm guessing not.

 

 

If the afr is stating its running the right levels for a charged car its a job well done imho, 90% of the time you would just create a brand new top of the line piston melting fiesta so if it works your lucky i guess. To be honest i am suprised it made that kinda bhp from a m45 though as there s*it. Even the m62 couldnt boost well enough for my g60 so i went stage 5 instead with standard charger and 19psi ,which also meant a rebuild every 4000 miles

Edited September 16, 2011 by 205_sunderland

[Baz 421]

It'll go bang.

[Rippthrough 98]

If the ECu can sense the extra airflow, then fine.

 

However, part throttle, low revs, and transient states will feel terrible compared to a properly mapped car, and the timing probably means at some point it'll do just what Baz says.

Getting an engine to pump out big power is easy - I could have my 1.4 TU pushing 200bhp by the weekend if I wanted - getting it to stay making that power for a decent length of time is the problem.

 

Getting it to make that power, stay together, and drive well in the lower ranges/under transient throttle is the holy grail.

Edited September 16, 2011 by Rippthrough

[peter 20]

part throttle, low revs, and transient states will feel terrible compared to a properly mapped car

 

this is true as you have to roll on the throttle ever so slightly, but as for it going bang, its been like this since july and every time it gets taken out, once the oil is warm it gets absolutely thrashed.

 

surley all ecu's can tell there is extra air, but i would never have thought you could just boost an engine and it would fuel ok

 

its now running a slightly larger crank pulley making 10psi although this made it run slightly lean so the extra fuel is supplied by a nitrous jet wich has made it considerably faster. Its quicker from 40-140 than a impreza sti uk 300

 

hasnt gone bang yet...

[peter 20]

as for the m45 not being very good, they make well over 200hp on the mini's 1.6?

[205_sunderland 4]

as for the m45 not being very good, they make well over 200hp on the mini's 1.6?

 

They are bullet proof in the new gen versions with ti internals but my experience of them was a bit of a let down, i was messing with cars that were made to use big boost and they get hot as hell when you crank them up which ultimately looses power massively so maybe its down to the applications ive used them on. I always thought the rotrex chargers were the balls as they can run up to 30psi with very minimal heat soak

[rallyeash 155]

awaits conrod to come out the block post.

[peter 20]

yeah the rotrex charger is better, but the m45 does work quite well at 10 psi

[gaz832 7 1 Cars]

That engine wont last much longer. Also, 7psi giving 210bhp? OC Motorsports 1.6 runs 200bhp at 13psi.

[welshpug 1,657]

lynx iirc send 6 psi through a stock xu10J4RS with a throttle body restrictor for 250 bhp, definitely larger injectors and a map required though.

[peter 20]

That engine won’t last much longer. Also, 7psi giving 210bhp? OC Motorsports 1.6 runs 200bhp at 13psi.

 

Well it’s still going...

 

Boost is now 10psi thanks to a 140mm crank pulley which has made the car even faster, this did make it run lean so it’s being fuelled with a fuel solenoid from a nitrous kit.

 

Simple maths would tell you that 7psi would give an increase of 71 bhp (over 150) minus a bit, So 150 bhp + 71 = 220 - a bit

 

(150/14.7)*7 = 71.43

 

a standard puma engine with puma "racing" exhaust manifold puts out nearly 150 bhp

 

conrods are still very much in the block

 

It pulls 0-140 (limiter in 5th) in less than half a mile, hasn’t been dyno'd or on the 1/4 mile yet, should be an improvement on the 14s 1/4 mile (when there was a 25mph head wind and m5s were running 14.5s+)

[peter 20]

The fiesta ran a 13.6 @ 104 mph at santa pod this weekend...

 

My 2.1 N/A standard injection mi16 only ran a 14.8 at 99mph

 

A mates 3.0 e36 ran a 13.3 @106

 

all cars were on road wheels and tyres, think the 205 will be getting turbo'd

[welshpug 1,657]

get the 2.1 mapped properly and it should be a helluvalot quicker, a bog standard one should pull those times

[Anthony 1,003]

Impressive that the Puma is coping so well on a standard ECU, and sounds like a lot of bang for buck with the claimed output and if it's running mid 13's on the quarter mile

 

a standard puma engine with puma "racing" exhaust manifold puts out nearly 150 bhp

Does an otherwise standard Puma really get nearly 150hp with just a FRP manifold though when they're what, 125hp standard? Just seems a bit optimistic as wasn't the complete FRP package only a fraction more than that claimed figure at 153hp with quite a few more modifications like cams, VVT etc?

[peter 20]

Yeah i know, i was seriously disapointed, for some reason it only revs to 7050 and i was spinning the wheels too much off the line. Plus i havent a clue what the valve timing should be.

 

The standad puma has vvt, but yes the cams and map and inlet manifold are different. but like the 16v tu they respod quite well to decat and manifold there 122 standard

Edited March 27, 2012 by peter