Hi Spec Engine - Best Manifold

[GilesW 41]

So- I have a forged s16, cams etc on tb's. Expecting about 230ish once mapped (have a longman head for the future to....)

 

I have the 2.25 maniflow manifold (2 actually), and I'm mating this to a 2.5 stainless 2 box system.

 

Question -

Is the 2.25 manifold too small?

Should I be considering the maniflow/longman race competition manifold?

 

People with any thoughts/experience on this sort of level of tuning have any thoughts?

 

Ta.

[petert 641]

Yes, it's border line.

[Tom Fenton 1,650]

Vulture alert, I'm interested in a manifold if you would consider selling one.

[welshpug 1,737]

i doubt the manifold is 2.25", only the collector, that can easily be changed.

 

'best' manufold is one made to spec.

[dcc 855]

I think you match exhaust to the inlet in terms of length, diameter and using pulse tuning to its max. Potential for scavenging.

 

I have only read enough to uncover the tip of the iceberg which is engine design!

 

Its not as easy as 'oh that will do because its bigger' by anymeans

[GilesW 41]

Thanks for all the replies people.

 

From the comments made it seems I'll be looking for a maniflow competition exhaust then.

 

Expect to see some for sale ads up soon for 2 x 2.2.5" manifolds and a maniflow 2" system.

 

Tom - I'll message you. Also I'll send you the satchel inlet as I know I've not done what I said I would on that so apologies for that.

 

 

welshpug & dcc:

comments noted and totally understood. I know I asked a fairly simplistic question, when I do actually have a bit experience in these things too:

My last track car I spent £35k on and it ran an simpson race manifold and system that they made specifically for me to SBD's defined specs to match my engine and car.

It was a total work of art, and worked well.

I'll stick some photos up at some point (it was a shame to wrap it.....).

 

 

This car is a 'budget' build. Hence happy to go with an off-the-shelf solution.

[blandy 29]

Any more info on your engine - not related to the manifold just genuinely interested as looking to go in a similar direction

[GilesW 41]

Quick spec dump:

 

S16.

Wossner pistons on steel rods.

Headwork.

New valves etc.

piper 285 cams with piper twin springs. (Have a longman head and wilder Kent cams as a next stage).

Cometic gasket.

Piper verniers.

Gti6 oil pump spring etc.

Ttv flywheel & helix clutch.

Light weight crank pulley.

Satchell inlet and trumpets.

Jenvey 45 bodies

MBE ecu.

3j diff.

Vts box.

Satchshift.

309 front running gear.

Vts rack.

309 new rear beam, 25mmy torsion, 21mm arb (iirc).

2.5" stainless exhaust.

Seems like I'm upping to a 'race' maniflow manifold.

Accusump.

C12 cage.

Hill climb built shell (non sun roof, very clean).

Sparco seats.

Aeroquip fuel system with red top lifter, 044 hp pump, and swirl pot.

Gel battery (probably go to a lithium).

Raychem engine and car looms (trips instead of fuses).

Obviously harnesses (6 point).

Heated front screen.

Carbon fibre full dash (real cf).

Plumbed fire extinguisher system.

Fiber glass bonnet & boot.

Polycarbonate windows all round.

Racetech mirrors.

Baker BM fully adjustable front top mounts.

Gaz's coilovers and rear springs & shocks.

Bbm engine mounts.

Tiny alternator.

Low rad & fan.

Silicon hoses.

Gti6 brakes and mintex pads.

Full pedal box and bias valve (remote resouvoirs).

Pro race 1.2's.

2 x sparco snap off steering wheels (1 suede race, 1 road).

Full digital micro dash system.

 

Probably some other bits too that I've forgotten.....

Edited March 16, 2017 by GilesW