Who here has had the 4.7 AJP upgrade?

[Skellz]

I'm interested to hear from people who have had the 4.7 AJP upgrade and their thoughts.
Few starter questions:

1) Where was it done?
2) Did you get any other bits done as well to push the power up?
3) What was the final torque and BHP figures?
4) Are the power differences RELLY noticeable?

Cheers
Steve

[Gazzab]

Andy at Apm is where id go. To get the high power you need to look at getting high compression afaik.

[anonymous-user]

[HarryW]

djstevec said:

so so true....

[Jhonno]

I think a few have been disappointed with final numbers but not how they drive..

[Mr Cerbera]

Skellz said:

I'm interested to hear from people who have had the 4.7 AJP upgrade and their thoughts.
Few starter questions:

1) Where was it done?
2) Did you get any other bits done as well to push the power up?
3) What was the final torque and BHP figures?
4) Are the power differences RELLY noticeable?

Cheers
Steve

For an increase in 0.04% capacity I wouldn't be expecting a large increase in performance but I would hope for an extra 100K miles

[Gazzab]

Mr Cerbera said:

For an increase in 0.04% capacity I wouldn't be expecting a large increase in performance but I would hope for an extra 100K miles

It's nearer 5%. The power increases have been in some instances dispropriantley higher than the capacity %

[SimonKD]

Gazzab said:

It's nearer 5%. The power increases have been in some instances dispropriantley higher than the capacity %

My thoughts exactly Gazzab

A 200cc increase from 4.5 to 4.7 works out to a 4.44% increase.

Regards
Simon

[esso]

djstevec said:

This !

[Jhonno]

Iirc isn't it the head/induction side than becomes a restriction when chasing some bigger numbers? Some of the bigger powered 4.7's had headwork at the same time..?

[Skellz]

Jhonno said:

Iirc isn't it the head/induction side than becomes a restriction when chasing some bigger numbers? Some of the bigger powered 4.7's had headwork at the same time..?

From what information I have gathered so far this looks like the case. A basic 4.7L as I would like to call it, has a good increase (40-50lb) in torque and a small (20bhp) increase in bhp across the Rev range BUT little increase in peak bhp.

To get increases in peak bhp as well you need to add:
1) red rose heads
2) larger injectors
3) race cams
4) modified manifolds/exhaust.

Cheers
Steve

[gacksen]

Skellz said:

From what information I have gathered so far this looks like the case. A basic 4.7L as I would like to call it, has a good increase (40-50lb) in torque and a small (20bhp) increase in bhp across the Rev range BUT little increase in peak bhp.

To get increases in peak bhp as well you need to add:
1) red rose heads
2) larger injectors
3) race cams
4) modified manifolds/exhaust.

Cheers
Steve

would add an aftermarket ECU in that case too.

[Jhonno]

gacksen said:

Skellz said:

From what information I have gathered so far this looks like the case. A basic 4.7L as I would like to call it, has a good increase (40-50lb) in torque and a small (20bhp) increase in bhp across the Rev range BUT little increase in peak bhp.

To get increases in peak bhp as well you need to add:
1) red rose heads
2) larger injectors
3) race cams
4) modified manifolds/exhaust.

Cheers
Steve

would add an aftermarket ECU in that case too.

I think the standard MBE would be ok with a remap?

[gruffalo]

Jhonno said:

gacksen said:

Skellz said:

From what information I have gathered so far this looks like the case. A basic 4.7L as I would like to call it, has a good increase (40-50lb) in torque and a small (20bhp) increase in bhp across the Rev range BUT little increase in peak bhp.

To get increases in peak bhp as well you need to add:
1) red rose heads
2) larger injectors
3) race cams
4) modified manifolds/exhaust.

Cheers
Steve

would add an aftermarket ECU in that case too.

I think the standard MBE would be ok with a remap?

Yep, nothing wrong with the MBE ECU.

[esso]

Standard ECU is not good enough to map a 4.7 properly for road use,a lot of 4.7's have been done for racing use, not many for the road,I know of one and it's not quite right yet, needs the ECU upgrading to map it correctly.

Edited by esso on Wednesday 16th December 13:33

[Jhonno]

esso said:

Standard ECU is not good enough to map a 4.7 properly for road use,a lot of 4.7's have been done for racing use, not many for the road,I know of one and it's not quite right yet, needs the ECU upgrading to map it correctly.

Edited by esso on Wednesday 16th December 13:33

Why not? Surely it is the same engine with "just a tweak" on fueling and timing to suit the extra capacity?

[gruffalo]

Jhonno said:

esso said:

Standard ECU is not good enough to map a 4.7 properly for road use,a lot of 4.7's have been done for racing use, not many for the road,I know of one and it's not quite right yet, needs the ECU upgrading to map it correctly.

Edited by esso on Wednesday 16th December 13:33

Why not? Surely it is the same engine with "just a tweak" on fueling and timing to suit the extra capacity?

My 4.7 is used mostly on the road and is just fine on the MBE, mapping point every 250RPM is fine.

[Jhonno]

gruffalo said:

My 4.7 is used mostly on the road and is just fine on the MBE, mapping point every 250RPM is fine.

What are your numbers/spec? Have you got a dyno printout?

[gruffalo]

Jhonno said:

gruffalo said:

My 4.7 is used mostly on the road and is just fine on the MBE, mapping point every 250RPM is fine.

What are your numbers/spec? Have you got a dyno printout?

No print out, was 402BHP at Surrey Rolling Road before the upgrade it is much quicker now.

I may go back and get it retested when I get round to it.

[esso]

gruffalo said:

Jhonno said:

gruffalo said:

My 4.7 is used mostly on the road and is just fine on the MBE, mapping point every 250RPM is fine.

What are your numbers/spec? Have you got a dyno printout?

No print out, was 402BHP at Surrey Rolling Road before the upgrade it is much quicker now.

I may go back and get it retested when I get round to it.

I too would be interested in the figures its putting out since the upgrade. May I ask if it was putting out 402BHP before the upgrade, which is a pretty good figure why you went for the 4.7?....did your engine require a rebuild?....don`t see many figures posted on here for 4.7 upgrades.