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Old 06-18-2003, 00:51   #1 (permalink)
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cfi power

i know i have this question once before but i want to get some power out of my cfi with a 3 speed auto without doing the mpi what tpe of mods could i do
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Old 06-18-2003, 01:02   #2 (permalink)
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haha there is only one answer to this question and you already know what it is.

I have spoken to a very reputable engineering company and they basically told me there is nothing you can do to the head in the way of porting etc. to get any decent power increases out of it with CFI as it wont idle due to not having enough vacuum with the cfi inlet manifold. Neither can a decent cam be fitted for the same reasons.

Basic type mods can be done like exhaust and extractors and changing your diff gears for better acceleration, but if you want decent power go mpfi. It's cheaper to convert it over than buying a complete exhaust system for your car and your guaranteed 19kw in doing it, whereas a complete exhaust system can't even guarantee a quarter of that power increase.

Also with changing to mpfi you'll find that your engine will rev alot more easier
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Old 06-18-2003, 01:20   #3 (permalink)
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Just do the MPFI dude. It's worth it for sure.
My car is such a better drive since going to MPFI I would never go back.
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Old 06-18-2003, 02:11   #4 (permalink)
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manual :)
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Old 06-18-2003, 03:37   #5 (permalink)
 
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May I ask why you dont want to go MPI?? Its the best value for money modification you could possibly do to your car! It can be done for as littel as $200 (Get parts from wrecker & DIY) thats 1/2 the price of an exhaust system and about $50 more than a cold air setup!
DO IT, DO IT, DO IT DO IT, DO IT, DO IT, DO IT!!!!!
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Old 06-18-2003, 04:19   #6 (permalink)
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I have a 3.9l CPI and it hammers, I think it all depends on engines and the condition of the car. I have extractors, 2.5in exhaust and high flow cat, 4spd auto, K&N air cleaner element and basically a brand new engine it I continually beat my mates EBII 4lt 165km on the clock from a take off and drop back. And befor you guys start saying I full of BS another friend has a VS series II V6 ute and we are neck and neck from 0-120km then I start to pull away. So i think all depends on the condition of the car because a good CPI car will easily flog a tired mpi car.
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Old 06-18-2003, 04:46   #7 (permalink)
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I agree partialy with this my dads EA CFI with cat back exhaust hammers as well. But my MPFI EB (heavier) OWNS it.
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Old 06-18-2003, 05:29   #8 (permalink)
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5spd Manual,extractors, zorst are the main easy options, in order of 'goodness' IMO, if you dont want MPI.


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Old 06-18-2003, 08:22   #9 (permalink)
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Quote:
Originally posted by jjj
I have a 3.9l CPI and it hammers, I think it all depends on engines and the condition of the car. I have extractors, 2.5in exhaust and high flow cat, 4spd auto, K&N air cleaner element and basically a brand new engine it I continually beat my mates EBII 4lt 165km on the clock from a take off and drop back. And befor you guys start saying I full of BS another friend has a VS series II V6 ute and we are neck and neck from 0-120km then I start to pull away. So i think all depends on the condition of the car because a good CPI car will easily flog a tired mpi car.
i agree with JJJ. my first ea was a fairmont with cfi, the only mods to it was a ed xr6 stock cat back exhaust kit, and a new gas system, comparing that to my ea fairmont ghia... well there aint a comparison, my old ea would of killed it off the lights but maybe not for top end speed, it also beat a friends 300zx twin turbo 5 speed upto 80 on my l's, but this was about 2 years ago. 300zx killed me after.

i think it really depends on how the car has been treated all its life, this was obviously treated well (untill i got it ).
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Old 06-18-2003, 22:22   #10 (permalink)
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Re: cfi power

Hey Ppl....

Is this some kind of competition that is running between MPI and CFI... Well if it is CFI PPL.....what mods have you done to your car!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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