taylorboosh
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Registered: 3rd Apr 07
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about 6 weeks ago i bought a 4 into 1 manifold off the bay for my c. it cost me 25 pound.
alot off people said it would be wank and shite all round.
well its been rolling roaded and seen an increase from 82.9bhp with a huge flatspot around 4500rpm, too, wait for it, 97.5 and no flat spot, could do with a bit more power low down so and ideas ? done the induction kit and full exhaust ?
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taylorboosh
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Registered: 3rd Apr 07
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thats 14.6bhp
so at 25 pound that works out at
£1.71 per 1bhp. bargain, if anyone else has had a better buy then let us know
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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its more likely the rollers are overreading mate
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taylorboosh
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Registered: 3rd Apr 07
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quote:
Originally posted by Steve
its more likely the rollers are overreading mate
didnt mention it needed a new lamda sensor when it was alst on 
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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I must admit that I was wrong about the 'crappy' looking manifold. it did the job well and saw a fantastic increase at high revs.
No over reading on the rollers, both the before and after run used the same calculations in shootout mode on the dyno.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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dave ffs an exhaust fannymold isnt going to add 15bhp, on a 1.4 16v,i gained about 5, if that on my 106
[Edited on 03-09-2007 by Steve]
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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hold on a minute, so was the first run done with a bust lambda sensor and the second with it working again?
if so thats more likely to have restored the gains with the manifold adding a little on top
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taylorboosh
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Registered: 3rd Apr 07
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quote:
Originally posted by Steve
hold on a minute, so was the first run done with a bust lambda sensor and the second with it working again?
if so thats more likely to have restored the gains with the manifold adding a little on top
yeh but either way its 10 bhp up on standard
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micra_pete
Premium Member
Registered: 23rd Apr 03
Location: West Yorkshire
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steve 15bhp is common place on the 1.3 nissan engine with a decent manifold and exhaust.
most readings on dynos see 25bhp increase from 75bhp to 100bhp.
However 75bhp to 90 is one of my readings from a decent rollers.
granted standard output could be higher than 75bhp, but never been arsed to test
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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no offence micra_pete, and i dont have and personal issues with yourself, but from my experiences 15-25bhp is ludicrous gains from an exhaust and manifold on a small engined n/a car
[Edited on 03-09-2007 by Steve]
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micra_pete
Premium Member
Registered: 23rd Apr 03
Location: West Yorkshire
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as i say, standard output may be higher - but its common place
Im sure i've sent you dyno sheets before
[Edited on 03-09-2007 by micra_pete]
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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i dont personally care for dyno sheets, theres only one dyno i trust
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Jamie
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Registered: 1st Apr 02
Location: Aberdeen
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Which is that steve?
Lads on a few of the MR2 clubs think 8-10bhp is possible from a manifold/exhaust on the 2.0 16v n/a
I personally cant see it myself
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Dan Lewis
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Registered: 31st Jan 05
Location: Leicestershire
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quote:
Originally posted by Steve
dave ffs an exhaust fannymold isnt going to add 15bhp, on a 1.4 16v,i gained about 5, if that on my 106
[Edited on 03-09-2007 by Steve]
why bring the 106 into it
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micra_pete
Premium Member
Registered: 23rd Apr 03
Location: West Yorkshire
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steve, whats the only dyno you trust?
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Dan Lewis
Member
Registered: 31st Jan 05
Location: Leicestershire
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quote:
Originally posted by micra_pete
steve, whats the only dyno you trust?
probly the one he took his gti on
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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the lambda sensor replacement would have played a massive part in the power figures as well.
car is up 10 bhp from standard with a sealed induction kit, custom exhaust system, decat and 4-1 manifold.
which on those engines is a realistic gain.
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Fro
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Registered: 20th Jun 06
Location: Rainham, Essex Drives: A3 2.0TDi Sport
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Based on the above thats slightly more realistic, but in corsabadboys second post, it was like he was sayin the 14bhp gain was just from the manifold.
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by micra_pete
steve, whats the only dyno you trust?
pointless question, tbf Steve isnt an expert on dynos and probably doesnt understand how a dyno works. Not a dig at Steve but lots of people claim to understand dynos and its not until you have used one on a dily basis form months that you really get a good idea of their operation and how the figures are generated. Ive had mine for 6 months now and still finding new features and modes on the dyno. I had used them previously to this as well.
all dynos are different and will give different readings except 1. Dyno Dynamics. a magazine rec ently went all round the country testing different dynos. The DD machines tested were all within 3 bhp from eachother and its virtually impossible to fiddle the figures on them when in shootout mode. I have not had a healthy standard car yet that has made any more than 5% over book figures.
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taylorboosh
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Registered: 3rd Apr 07
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quote:
Originally posted by fro-dizzle
Based on the above thats slightly more realistic, but in corsabadboys second post, it was like he was sayin the 14bhp gain was just from the manifold.
yeh because the only thing that has been changed since the first run is the lamda sensor, and manifold, the induction kit and exhaust where already on
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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quote:
Originally posted by Dave A
the lambda sensor replacement would have played a massive part in the power figures as well.
yes which when i read it again made kind of more sense. It was the way he worded it in the second post to suggest it had made all that from the manifold.
i dont agree with what pete is saying but thats just difference of opinion
i however think my opinion is right as however im sure he thinks the same about his
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ed
Member
Registered: 10th Sep 03
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Place your bets now, who will win this time? Dave or Steve? How many pages will this shitty argument go on for? 10? 20? 100? Who knows.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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im not arguing with dave,at least not now the full picture is painted
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taylorboosh
Member
Registered: 3rd Apr 07
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well if some 1 will fund it i will run the car again with standard then again with manifold? but i think the manifold made a hell of a lot iof difference just the power is much higher up, so it seems sluggish low down
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ed
Member
Registered: 10th Sep 03
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Well done, you have just described the characteristics of an engine with a 4-1 manifold.
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