D0NN3R
Member
Registered: 1st Mar 11
Location: Dunholme, Lincolnshire
User status: Offline
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is it true if a put a 1.3 head off a nova sr on to a 1.4 spi block it will be running more bhp than a stardard 1.4 8v spi
thanks
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Gary
Premium Member
Registered: 22nd Nov 06
Location: West Yorkshire
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Better off putting the MPi setup off an sri on it.
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nibnob21
Premium Member
Registered: 16th May 10
Location: South Derbyshire
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There are a few things you can do to tune them...but I've read you're looking at spending around £2000 for about a 25bhp increase, so only about 85bhp in total. Good exhaust system, cams, different head etc.
Far better off getting a 1.6 and tuning them. Can get pretty good gains just from power boxes and such like.
MX5 Project Thread
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D0NN3R
Member
Registered: 1st Mar 11
Location: Dunholme, Lincolnshire
User status: Offline
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it be cheaper for me to go 8v as can get parts cheap as cos got a mate who races the 1.3/1.4 and his is running at 92bhp with standard inlet custom made exhaust manifold lightweight flywheel and a ported head and might be having my dads 1.4 8v engine out of his astra as its going to scrapy at the end of the year
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D0NN3R
Member
Registered: 1st Mar 11
Location: Dunholme, Lincolnshire
User status: Offline
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anyone no if an 1.6 8v flywheel fits a 1.4 8v
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Gary
Premium Member
Registered: 22nd Nov 06
Location: West Yorkshire
User status: Offline
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Mpi will get you 20bhp ish for 50quid in a scrappers.
£2000 my arse
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JaffaTB
Member
Registered: 7th Oct 09
Location: Sheffield, South Yorkshire
User status: Offline
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should fit, they are basicly the same engine
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nath2905
Premium Member
Registered: 6th Sep 10
Location: Staffordshire
User status: Offline
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i got my mpi head, inlet, injectors etc, and loom and ecu for around 100
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Corsa_Sport21
Member
Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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DO NOT waste any time or money trying to tune the SPi 8v engine.
The gains you will get are minimal, and will only be noticeable on a dyno.
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Gary
Premium Member
Registered: 22nd Nov 06
Location: West Yorkshire
User status: Offline
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The spi and mpi head are interchangable. Just inlet back are needed. Cs21 go look at the 1400 spi bhp compared tothe 1400 mpi bhp, then go find a bhp upgrade like that for sub £100 on any other engine.
Minimal my arse
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D0NN3R
Member
Registered: 1st Mar 11
Location: Dunholme, Lincolnshire
User status: Offline
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quote:
Originally posted by Corsa_Sport21
DO NOT waste any time or money trying to tune the SPi 8v engine.
The gains you will get are minimal, and will only be noticeable on a dyno.
ive been doin research and you can get very good gains from a spi engine as said above my mates race car one is running 92 bhp
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