corsa120
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Registered: 4th May 02
Location: Northamptonshire
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ever so slightly quicker dont want much extra but let me know of im wrong its a coscast lump with 153bhp
will be running,
no cat
custom exhaust from ascar
4-2-1 manifold
unichip
vipor filter/bmc filter unit
do u think it would push close to 170bhp if its a mechanically sound engine as that will be plenty just to have that bit extra over stock performance of the lump.
or what performance aids do u recommend for the xe apart from tb's dont want em
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corsaandy
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Registered: 29th Jan 03
Location: Northamptonshire
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i would say it would be about 165bhp if your lucky
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Fad
Member
Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
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mines 163 with just zorts and filter 
got a better spec now so would be interesting to see how much power it has now
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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They are 156bhp on the early non cat cars with coscast heads. The manifolds are 4-2-1 as standard, so whether gains whatever you fit depends on what its like I suppose.
Custom exhausts are a bag of worms really performance wise.
I personally wouldn't spend that much money on a unichip with such basic mods.
Also do the throttle body (butterfly) mod and remove the afm meshes.
I've seen standard XE's get 160bhp on rolling roads, which goes to show how far out a lot of rolling roads are.
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and-m
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Registered: 5th May 02
Location: Liverpool. Drives. Skud vRS.
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quote:
Originally posted by fadscorsa
mines 163 with just zorts and filter
got a better spec now so would be interesting to see how much power it has now
Dont take that as gospel though.
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corsa120
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Registered: 4th May 02
Location: Northamptonshire
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end of the day 1.4/1.6 16v engines respond well to breathing mods and stock 1.6 16v with decent bmc filter/piper exhaust (or similar) can see 5-6 bhp more power, what im trying to say the bigger the engine and more power u have to start with means the more power gained from adding performance aids
take a subaru turbo and add a decent cat-back system they can gain like 20bhp just from that one mod, now take the none turbo subaru and fit same exhaust it will only gain 4-8 bhp if ur lucky, reason why is because turbo has more to start with, TTS bike tuning shop use this theory and he is best in the country so if any1 says im wrong its not me who said this 
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Joff
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Registered: 17th Oct 00
Location: Cambridgeshire
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Performance gains from the same mod aren't on a sliding scale depending on engine capacity.
Filters gain more on different applications because different applications are restricted in different ways.
Its not unheard of for some lairy Jap engines to lose power when the standard air system is removed - just because they perform so well it can't be improved on.
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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yes but turbo engines are a different kettle of fish mate you cant compare how an exhaust gived power on a turbo and on a none turbo.... on a big power car and a smaller power car yes if yourtheory works then go for it but it all depends on the standard stuff you will be replacing, if you want a good custom exhaust go to hayward and scott, did my dads 911 exhaust and its amazing the diff that makes, his is a 3.2 NON turbo. in all honesty id say youll be getting 165+ with the mods listed abo=ve, id wait and fit cams and verniers before you get the mapping done.
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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quote:
Originally posted by Joff
Performance gains from the same mod aren't on a sliding scale depending on engine capacity.
Filters gain more on different applications because different applications are restricted in different ways.
Its not unheard of for some lairy Jap engines to lose power when the standard air system is removed - just because they perform so well it can't be improved on.
i.e. the best induction kit for the s2000 looses the car 15bhp doesnt it?!
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corsa120
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Registered: 4th May 02
Location: Northamptonshire
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like i said not my theory really
but the lump carries 156bhp in stock form, so to expect 10 bhp from the above mods is nothing at all, like i said 1.4/1.6 engines gain approx 3-5 from an exhaust/decent filter
and the standard 4-2-1 on these engines is a small bore u can replace with a more less restictive one
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corsa120
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Registered: 4th May 02
Location: Northamptonshire
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oooh i 4got my next door neigbour works for cosworth and he is getting my head gas floed by stuart cunningham top engine builder there for 100 quid
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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is the 4-2-1 your getting a bigger bore ,dont forget that a bigger bore dont necessaryly(sp) mean more power mate, can cause a loss of power mid range etc, end of the day its not about max bhp, its about how it delivers it.
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corsa120
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Registered: 4th May 02
Location: Northamptonshire
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yeh i understand that m8 soon as i fitted my 4-2-1 on me 1.6 did'nt feel quicker but felt more revvy and less breathless which is delievry in a sense
yes the bigger bore 4-2-1 on xe will gain decent power seen j100rsa's when i was up there few mods its pushing 200bhp at fly
thats why im sure i can get 10-15 bhp from chip/filter/zorst/no-cat/head work
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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200 at fly, without throttle bodies?
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corsa120
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Registered: 4th May 02
Location: Northamptonshire
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well thats what he showed me lol but who knows lol
soon as engine is done, rocker/cam cover/power cap and few other bits are off to chromers and anodising
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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sweet, can make engine bays looks so nice when cleaned up, mine looks so much better since i polished my cam cover up and removed the big yellow handle off the oi lfilelr cap
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corsa120
Member
Registered: 4th May 02
Location: Northamptonshire
User status: Offline
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lfilelr 
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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yes its a sunday morning and im tired trying to get the energy to go to my garage and fimish my gauge pod lol!
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corsa120
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Registered: 4th May 02
Location: Northamptonshire
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just do it dude
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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i shall do, aiming to get the pod finished today and have my gauges wired up, well when i say wired up i mean lighting up! will plum the sensors in on the next oil change
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LukeGSi
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Registered: 9th Dec 03
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quote:
Originally posted by miles
Also do the throttle body (butterfly) mod and remove the afm meshes
Please explain.
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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look at the throlle body, o nthe butterfly there is a wedge on it, remove the wedge. and the mesh on the afm.
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LukeGSi
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Registered: 9th Dec 03
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Gain?
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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There is a 'wedge' on the butterfly that is designed to assist low throttle positions and give a smooth low throttle power delivery. However at full throttle its an obvious restriction. Its easy to remove, but your left with 2 holes in the butterfly. Slightly countersink either side of the hole, and fill with chemical (jb) weld. Then trim back to smooth. Do a search on migweb for more details.
The AFM has meshes either side of it, these are pointless and a restriction, ditch them.
Turbo tuning is a lot different to n/a tuning.
If you had a 200bhp turbo engine and a 200bhp n/a engine, then fitted a 3" exhaust to both of them, the turbo would gain power and the n/a engine would most probably loose a bit of power, and a whole load of torque.
The more power a engine makes as standard, the harder it can become to tune.
Obviously its more plausable to get a 10 bhp gain from a 2 litre than it is from a 1 litre, but the gains to be had depend a lot on the quality of the standard items.
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LukeGSi
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Registered: 9th Dec 03
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quote:
Originally posted by miles
The AFM has meshes either side of it, these are pointless and a restriction, ditch them
Is this worth while on c16xe?
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