remaping

[redeye]

morning ,my 4.2 is going to have a 12000 service and a remap on monday with Austec
what kind of improvements will/could i get

[Gazzab]

redeye said:

morning ,my 4.2 is going to have a 12000 service and a remap on monday with Austec
what kind of improvements will/could i get

Assuming everything else is in order then very little on a 4.2 IMHO.
If though the car has a few running niggles and these are sorted then this combined with the map will see improvements.
The map will smooth things out but unlikely to gain many horses (in isolation).

[Gray_101]

When I got mine it only made 287 bhp, after a service and remap it made 340 bhp, after that I removed the sports pipes and re fitted the standard back box and did the optimal cam timing mod, it made 357 bhp.

Since then I've had a high flowing custom made exhaust fitted by Raceproved, and is going for a dyno run very soon. I'm hoping for around 370 bhp, but as said the gains are small for a 4.2

[Bodmin]

redeye said:

what kind of improvements will/could i get

First name term basis with recovery truck drivers.....

[redeye]

Bodmin said:

First name term basis with recovery truck drivers.....

thank feck for that i thought i might end up with a chest wig, bold head and become a griff driver.
its nice to see theres a place for everyone in this world no mater how stupid they are

[FUBAR]

redeye said:

its nice to see theres a place for everyone in this world

Yup, even disgruntled ex employees grinding axes. Room for all sorts

[Bodmin]

redeye said:

thank feck for that i thought i might end up with a chest wig, bold head and become a griff driver.
its nice to see theres a place for everyone in this world no mater how stupid they are

[APMAUTO]

a good 4.2 engine should be around 360ish, of all the ones i've built the lowest was 365, highest 372 with cats and no mapping,i don't think you'll gain much in power from mapping but you will inprove driveabilty/throttle response aimo

andy

[redeye]

APMAUTO said:

a good 4.2 engine should be around 360ish, of all the ones i've built the lowest was 365, highest 372 with cats and no mapping,i don't think you'll gain much in power from mapping but you will inprove driveabilty/throttle response aimo

andy

at last someone come a long with there brain in ,thank you this is the feed back i was looking for
ex employers whats that all about?

[Bodmin]

redeye said:

ex employers whats that all about?

Have a look at the threads mid aug 2008....

but have a look at this thread

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Gazzab]

redeye said:

at last someone come a long with there brain in ,thank you this is the feed back i was looking for
ex employers whats that all about?

Cheers :-(

[Pursyluv]

Gazzab said:

Cheers :-(

He's read your previous 11,451 posts so probably didn't bother with this one

[Mags]

Please post back with your results and let us know how you get on. I'm round the corner from Austec and was thinking of getting the Cerb on the RR for a dyno run and see what benefits a remap would bring.

[assynt road]

As already stated above, you won't gain alot of horses if your engines running nicley anyway. Jools remapped my 4.2 and did some porting work on the inlet manifolds which gave an extra 25hp in total. This isn't the real story though, the cars smoothness and low down grunt were transformed, it now pulls strongly from 2000revs upwards to the beep without any hesitation. It was well worth the money for the mapping for this alone.
Maps can be 'massaged' to provide lots more pops and bangs as well........

[RichV6]

assynt road said:

As already stated above, you won't gain alot of horses if your engines running nicley anyway. Jools remapped my 4.2 and did some porting work on the inlet manifolds which gave an extra 25hp in total. This isn't the real story though, the cars smoothness and low down grunt were transformed, it now pulls strongly from 2000revs upwards to the beep without any hesitation. It was well worth the money for the mapping for this alone.
Maps can be 'massaged' to provide lots more pops and bangs as well........

I can agree totaly with this having the same done. If you go ahead make sure your not going to change the exhaust after. Getting the feeling I'm going to have to get the map tweaked as the low down hesitation and missing has returned after changing the exhaust system.

[Gray_101]

I called into Raceproved this morn, and Joos was there stood next to an empty dyno.

So he did me a quick power run



Apart from the re map i had done a couple of years ago at Track Car and the High flowing exhaust, my engine is completely standard.

Once my badly cracked manifolds have been swapped for 4.5 ones and the inlet manifolds have be ported and polished with bigger butterflys fitted, im hoping it might hit 380 - 390 bhp which isnt bad for a 4.2

Edited by Gray_101 on Monday 28th March 18:40

[Gazzab]

Well done on that power run.... What is the exhaust you had made? What did you have before?

[assynt road]

[inlet manifolds have be ported and polished with bigger butterflys fitted, im hoping it might hit 380 - 390 bhp which isnt bad for a 4.2

So Joo is gonna fit larger butterflies to the standard inlets then?

Very interesting...........

[Gray_101]

assynt road said:

[inlet manifolds have be ported and polished with bigger butterflys fitted, im hoping it might hit 380 - 390 bhp which isnt bad for a 4.2

So Joo is gonna fit larger butterflies to the standard inlets then?

Very interesting...........

R8nan s inlets have been done like this, so its not a first

Gazzab,,,,, My Exhaust is a Raceproved custom made one, its 2 1/2 " bore stainless from the exhaust manifold back ( un linked were the D cats used to be ) johnny has got a good vid of it kicking flames out

Before it had a Track car un linked D cats and a standard 4.2 exhaust on

[Byker28i]

assynt road said:

As already stated above, you won't gain alot of horses if your engines running nicley anyway. Jools remapped my 4.2 and did some porting work on the inlet manifolds which gave an extra 25hp in total. This isn't the real story though, the cars smoothness and low down grunt were transformed, it now pulls strongly from 2000revs upwards to the beep without any hesitation. It was well worth the money for the mapping for this alone.
Maps can be 'massaged' to provide lots more pops and bangs as well........

Joo did this to mine, the low down grunt is brilliant and makes the car extremely driveable. The torque all bangs in at 2k revs. Mine was 346bhp at the start from a 13 year old, untouched, unmodified engine. It was 362bhp when it left, but it had badly cracked manifolds and it turned out a duff lead and coil pack. It recorded 382bhp on a local dyno after they were all swapped out. I'm now running with ACT stainless tuned length manifolds and ACT quiet exhaust system decatted.