Getting to 475bhp in an M400

[markrichards]

Gents,

Looking to get some work done on the M400 given it's currently stock (bar the key upgrades of pump wiring etc).

Intention is for 475bhp with a proper exhaust. With some help from Dave at urban the shopping list looks like:

- Exhaust
- Pro-alloy intercooler
- Valve springs
- Injectors
- Re-map

Key component is the exhaust. Price limit for all the work is £4k, which leaves c.£2k to spend on the exhaust.

Thoughts appreciated on the best system with this budget (H&S, Urban, other?) and whether 475bhp is realistic with this set-up.

Cheers

[Gadgeroonie]

you might want to think about some bigger turbo's

i doubt you will make 475 bhp on stock turbo's

[R0162]

Its an M400 Mike, it will already have the T28's and should make 475bhp no problem.

[hollowpockets]

Turbos only need a refurb/upgrade by universal which I'm hopefully going to achieve 550+ with at the end of this month, that along with the other things you mention will get you to 475, the clutch may need upgrading too though.

[Gadgeroonie]

550 bhp from standard m400 turbo's seems a bit optimitstic imho

has anybody done it ?

[hollowpockets]

They aren't standard, upgraded actuators, cut back blades on the exhaust side, larger wheel on the compressor side and I'm told by universal capable of 300bhp each at the spec they have been built too.

[R0162]

Gadgeroonie said:

550 bhp from standard m400 turbo's seems a bit optimitstic imho

has anybody done it ?

Yes, but not standard turbos though, they were T28's but with a bit of tinkering, sundance was running at 550bhp on T28's.

At 475bhp the torque should be able to be kept below 420lb/ft, if mapped by yellowshed, so clutch should not be a problem either as long as it is in good health.

[markrichards]

Appreciate it all.

Any thoughts on the exhaust? Understand it's been discussed many times...

[andygtt]

if you keep torque down you should be ok reliable to 430ftlb... you can make much more torque than that though so your clutch is the restriction in the package you plan.

You need to search on exhaust threads as you say its been discussed loads... 2k will get you an entire system including cats and flexis... don't buy one that doesnt have flexis as its lack of these that contributes to the manifolds cracking.

[wessexrfc]

markrichards said:

Appreciate it all.

Any thoughts on the exhaust? Understand it's been discussed many times...

Dave is your man for the exhaust system. Mine was one of the first he had done for the 3 ltr and it is still perfect after 2 years and 8 thousand miles under it's belt.

[TuxMan]

Hayward snd Scott do a full system with flexi,s , 97db so no issues with noise on track and currently Grant is making 600bhp with the system so very good for power !!