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Author What engine mods to gain more torque in low revs on 16V?
A2H GO
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Registered: 14th Sep 04
Location: Stoke
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   1st Oct 04 at 16:46   View User's Profile U2U Member Reply With Quote

I have a 96 Sport, 1.4 16V, the only trouble is, as with most 16V's, the acceleration is only noticable after 3.5-4k, therefore it has a major weakness over 8V's.

I would like to kno what sort of engine modifications i could do in order 2 open up a bit more power lower down in the rev range?

corsa_godfather
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Registered: 6th May 03
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1st Oct 04 at 16:57   View User's Profile U2U Member Reply With Quote

not really much you can do mate.full system and a manifold.apparently its either the 4-2-1 minifold or the 4-1 minfifold will give u more power down low but less up high and the other gives u less low and more high
broster
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1st Oct 04 at 17:01   View Garage View User's Profile U2U Member Reply With Quote

ull want 4-2-1 for al lround, also the 1.4 16v will never loose to a 1.4 8v sri s odont worry
corsa_godfather
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1st Oct 04 at 17:05   View User's Profile U2U Member Reply With Quote

^^listen to the man
A2H GO
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1st Oct 04 at 17:08   View User's Profile U2U Member Reply With Quote

now that i didnt kno

so start with the manifold, gonna De cat afta MOT this month, got a backbox, what next, cams or Inlet...?

i dnt mind if i loose a bit of top end power 2 compensate for the slugish bottom end
Rileysport
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Registered: 18th Jun 04
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1st Oct 04 at 17:17   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by broster
ull want 4-2-1 for al lround, also the 1.4 16v will never loose to a 1.4 8v sri s odont worry


will it not????
James R
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Registered: 4th Feb 03
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1st Oct 04 at 17:30   View User's Profile U2U Member Reply With Quote

An unfortunate characteristic of these engine a bit empty under 4k, kinda obvious cause of the large vlaves the engine has. courtney hi-torque cams maybe. Although revving it more could be a cheaper option
broster
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1st Oct 04 at 17:44   View Garage View User's Profile U2U Member Reply With Quote

well when my 1.4 was standard and modded no 1.48v beat me!
broster
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1st Oct 04 at 17:45   View Garage View User's Profile U2U Member Reply With Quote

also the first mod on the 16v engine should be the inlet then exhaust manifold, cams and head work
Rileysport
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1st Oct 04 at 17:46   View User's Profile U2U Member Reply With Quote

i beat standard 16v ones
broster
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1st Oct 04 at 17:49   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by SRi-Co
i beat standard 16v ones


was ur car modded, was he racing, only about 40ish when the 16v will pull away, u wont be far behind it till then
Rileysport
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1st Oct 04 at 17:54   View User's Profile U2U Member Reply With Quote

nope we were racing... i got off the mark faster and just pulled away, that was the end of that, got upto bout hundred, ive got cam zorst and big fook off cone filter thats all. ooh and i always run optimax
broster
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1st Oct 04 at 17:56   View Garage View User's Profile U2U Member Reply With Quote

yes well ur porpbably making more power than him or the same
A_Venables
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1st Oct 04 at 18:27   View User's Profile U2U Member Reply With Quote

I raced a 16 valve with same mods as my 8 valve, met him 2 weeks previous too the race, so I knew what it was packing, had him upto 70mph very, very easily, only when it got to 70 did he keep up and NOT pass me, the only nice thought for the 16 valve would be the mods would not work so well on the 16 valve, rolling roaded my car last week at Well Lane, figures are:
93bhp @ 5890, 94Ib/ft @ 2800, this is where an 8 valve will win, look at what and where my peak torque is!
broster
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1st Oct 04 at 18:43   View Garage View User's Profile U2U Member Reply With Quote

when ur racing d o udrive at 2800rpm
Rileysport
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1st Oct 04 at 18:44   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by broster
when ur racing d o udrive at 2800rpm


valid point... mine spins far too easily from the start... will just about grip in 2nd gear
broster
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1st Oct 04 at 18:47   View Garage View User's Profile U2U Member Reply With Quote

when im racing i get to 5k as soon as poss then try not to drop below it
miles
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Registered: 25th Mar 02
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1st Oct 04 at 21:12   View User's Profile U2U Member Reply With Quote

An inlet manifold helps everywhere, but as said, just rev it.
LiviLion
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Registered: 10th Feb 03
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2nd Oct 04 at 22:30   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by CorsAsh-Sport
I have a 96 Sport, 1.4 16V, the only trouble is, as with most 16V's, the acceleration is only noticable after 3.5-4k, therefore it has a major weakness over 8V's.

I would like to kno what sort of engine modifications i could do in order 2 open up a bit more power lower down in the rev range?




That's the deal with 16v versus 8v though. 8v's are better low down but 16v's come into their own once you get to 4k+.

Not really much you can do about it but be safe in the knowledge you'll overtake eventually.

I use the Saxo VTR as a good example. Off the line they are pretty much identical to a 1.6 Sport however once the revs hit 4k I pull away with ease.

Just remember to take the 16v all the way until you feel the power dropping off. Change up at this time.

Power should start to fade before you hit the rev limiter as well.

The above post relates to standard cars only.

LL
starkie
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3rd Oct 04 at 08:21   View User's Profile U2U Member Reply With Quote

i thought it was the vts that was 16v and the vtr 8v is that not the example you meant
miles
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Registered: 25th Mar 02
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3rd Oct 04 at 08:52   View User's Profile U2U Member Reply With Quote

Yeah VTR's are 1.6 8vs.

My misses 8v certainly picks up a bit after 4000rpm and pulls all the way to 6,000, with the standard inlet manifold the 16v is a bit crap up high, although that could just be because I was used to driving a 16v with the mantzel fitted...
BabyBlade
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Registered: 5th Feb 03
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3rd Oct 04 at 10:00   View User's Profile U2U Member Reply With Quote

depends on the driver....
James R
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3rd Oct 04 at 11:37   View User's Profile U2U Member Reply With Quote

Oh if you seriously want to increase low end toruq then nos, ot turbo with antilag or super charger.
But jsut rev the car, 4K launches
LiviLion
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Registered: 10th Feb 03
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3rd Oct 04 at 13:49   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by starkie
i thought it was the vts that was 16v and the vtr 8v is that not the example you meant


You are correct but I was comparing 8v against 16v hence comparing a Corsa Sport 1.6 16v with a Saxo 1.6 8v.

A 1.6 16v VTS is faster than a 1.6 16v Sport.

LL

 
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