Injection or Carb?

[m.d.]

i see your point aragorn and you are correct. but i hae an argument of my own, i had a standard gsi engine that i put a twinchoke webber onto to save the wiring as the gte i put it into's wiring was shot. (could not get hold of another loom at the time.) so basically i had a gte with a twinchoke on. everything else was standard, it made less power than the gte engine that was in there before too (proving your point)

but it used to beat gtes and gsis all day long. several different occasions did i do it to with different gtes and gsis so it was not a bad one i reced.

i put it down to the better power delivery from the carb, and much much better throttle response

[Aragorn]

fair enough but it could have been caused by other factors

shit driving, gearbox, other cars being fucked, other cars having shit tires

my 1600 16v ran a 16.4 1/4 mile last time i tried, a standard GTE can run that and with a good driver could prolly do better, but im 10bhp up on a std gte

i should be in the high 15's but a combination of shit tyres, crappy gearbox and it being my first ever time at the strip meant i didnt make it

throttle response in an injected car SHOULD be faster in an ideal setup, electronics are faster than mechanics if configured properly but its not always the case, i found my mates GTE much more responsive than my 16v in the midrange so even comparing 2 injected cars with different systems gives different results

[m.d.]

yeah injection SHOULD be faster response but have you ever driven a vauxhall injected car . you can dab the throttle on a nova gte astra gte and even my xe and itll take a second for the engine to even realise your there . the delay on standard injection is hiddious, throttle bodies on the otehr hand. :twisted:

[ALLNOVA]

injection more responsive than carbs?? mmm the word bull***t springs to mind. and as for electronics being faster than mechanics... lmao.. injection sucks!! unless tb's or a blower is used. carbs kick ass, and will punch just as hard as tb's if tuned correctly

[Aragorn]

sorry but u aint got a clue what im trying to get across here

carbs dont kick ass - they are shite as there is no accurate control over the fuelling

the key to power is to add the perfect amount of fuel for a given load situation and a bunch of needles jets and chokes is never going to be able to match a computer in accuracy and therefore and injected engine will always make more power to a similarly equipped carb

im not trying to say a standard 1.6gte engine is as good as a set of twincarbs as they are completely different systems - 1 throttle body vs 4 which is what u seem to have picked up on. Like for like the injection systems are better

TB's vs 40's
standard tuned port injection vs twinchoke carb

throttle response is down to the setup, when u snap the throttle open the engine will instantaneously be running very lean - what we deem to be "response" is how quickly it recovers from this leanout, the problem is that there are so many factors which vary the time it will take on both systems that it would have to be measured very carefully

i'd much rather have a TPI system over a twin choke carburettor any day - why do u think vauxhall fitted the GTE with TPI back in 1987 when they could have just taken a carb and used that? bearing in mind that in 1987 the costs of such a system would have been enormous as it wasnt untill 90-91 that electronic injection really began to become more widespread

[Paul]

Nova SRi's will beat SR's all day long. Put the SRi head on the SR, using the standard SR carb (compared to standard SRi Injection) SRi still wins.

If you want to up it to 40/45 vs. TB's, then this is a different matter. Both can be assholes to setup, and both can cost a lot of money. However you can fine tune TB's more than carbs, they are more responsive, more controlled through the rev range, probably better on fuel, IMO TB's would win.

I have an SR on carbs, and given the choice between SR on carbs with my SRi head, cam etc, or an SRi on TB's, I'd choose the SRi on TB's.

However they are too expensive, people know more about carbs on here etc, so they are just easier and cheaper to sort out.

However INJECTION WINS EVERYTIME.

[Matt Nova]

i had a 1.2i nova and was so much easier no messin about,

my SR however has to be adjusted manually for best gains etc

injection is easier but it depends on situatution

both are good, and power easily achievable with both