HO CFI Cam?

[Leo]

My question is which one of these is a better choice?!

Crane Cams 444211 - Crane CompuCam Camshafts

http://www.summitracing.com/parts/CRN-444211/RequiredParts/?prefilter=1

COMP Cams 35-421-8 - COMP Cams Xtreme Energy Retro-Fit Camshafts

http://www.summitracing.com/parts/CCA-35-421-8/

Also,
which pushrods would guys recomend?!

And am I forgetting anything else?!



- I already have these parts:
Edelbrock Performer Intake Manifolds
Edelbrock Intake Manifold Bolt Kit
Intake Manifold Gasket Set
HO CFI unit
HO ECM

[gadget73]

I highly doubt anything more interesting than the stock HO CFI camshaft will work properly for you. The ECM just isn't designed to deal with more cam than stock.

[ss_mini14]

why didn't you just buy the SEFI stuff? seems to me like it would be easier to convert for roughly the same price. maybe even less

[Pesty351]

Or just slap a carb on it since your already putting the 4bbl intake on it. The you don't have to worry about computer issues and the birds nest of wires that goes with.

[Lincolnmania]

Or just slap a carb on it since your already putting the 4bbl intake on it. The you don't have to worry about computer issues and the birds nest of wires that goes with.

because he cant get away with a carb in california

[1987cp]

What, same as you say it is in PA where you can't even use a newer-year complete engine (say, '91 351-VV in a '83 5.0 car) if the newer engine has a lower-tech induction system?

[Pesty351]

You all need to move you live in shitty states.

[Lincolnmania]

i doubt anyone would ever fail a cfi to efi converted car in pennsylvania.....our inspection stations are privately run......in the counties that have enhanced emmisions it just has to pass the dyno test.......california is weird...........and no i do not want to move to florida.....too hot down there

[Pesty351]

My vic is still has a Indiana plate on it.

[1987cp]

i doubt anyone would ever fail a cfi to efi converted car in pennsylvania.....our inspection stations are privately run......in the counties that have enhanced emmisions it just has to pass the dyno test.......california is weird...........and no i do not want to move to florida.....too hot down there

No, no, no, I mean like in my example of putting a '91 5.8 VV in a '83 5.0 CFI car. I believe you said that such a swap would be considered illegal in Pennsylvania and the owner would be essentially unable to re-register the vehicle after the carb was installed, even if it were part of a complete engine package removed from a vehicle 8 years newer than the one being registered.

I'd be beyond shocked to hear of anything being failed for converting anything to SEFI!

[Lincolnmania]

registration has nothing to do with emmisions inspection in pa other than you need registration......under 5,000 mi a yr the car is exempt, and if you were to do a later motor swap here, you can get a collectible title, then you are exempt from emmisions

[1987cp]

Hm.... I had been under the impression that any originally CFI or EFI car with a carb installed would fail the safety inspection ...

[85MercPark]

Please, just answer the mans questions.

[Leo]

It seems you guys have some mixed thoughts about a HO CFI upgrade...

Just a NOOB doing a simple upgrade within my budget and days off.

so, im guessing a stock ho cam from autozone, kragen, napa?....

Im still a noob my friends

One more thing, I also read this a when i joined GNM and it got me thinking...

Originally Posted by EBayGuy;
Actually I have done 1 unique throttle body setup (super similar to your CFI setup)

I had to duplicate the original Throttle bodies sensor plugs, computer control wiring etc..

it was easy to do that though because I basically just Y split the single plugs and tested the Ohms when it was all hooked up to verify the second Throttle body was not cutting the power in 1/2 like some dedicated power supplies sometimes do when you load them with twice the originally intended gear,

but because these are computer sensors the computer has an automatic power controller module that regulates the power being distributed to each sensor, and with 2 CFI's you would have 2 sensors cut the power in half on both and they would both show 1/2 the power so the computer would double the power automatically

some of the more basic designs like CFI units actually don’t even have a computer controlled Injection spray, they more or less have a dedicated 12 V line with a resistor on it that is turned on and off by the Distributor, and I really think your CFI unit is that kind of fuel delivery system, so basically if you can get a Dual twin carb intake manifold that will actually be able to fit 2 of these CFI units side by side that would actually have No Problem handling quite a good hunk of Power, especially if dual intake manifold had a larger port size than the stock one, I bet you would be able to achieve the 400 HP mark with room to spare, the twin TBI unit went on a BMW with a 6 Cylinder non turbo charged engine that had a pretty good upgrade rebuild. I have this other CFI unit here still the Guy that bought it has paypal address in France, and now he is not a verified eBay member, I can no longer seem to get any emails back from him so if you want this, it is 60 dollars shipped and is in such super clean condition you could probably eat off it, that would give you 4 injectors for your engine meaning 1 injector for every 2 cylinders, it would make it a 4 BBL CFI, good stuff.

[gadget73]

The injectors are pulsed off the computer. It has two injector driver outputs that are on for different lengths of time to obtain the neccesary amount of fuel based on engine load, engine speed, coolant temperature, and air temperature. Its not strictly a function of RPM, and its not driven direct off the distributor. Engine speed is determined by the distributor pickup, but the ECM actually controls the injector pulse.

If you put two units on, assuming the injector driver doesn't overload, you'd get two injectors with the same pulse width per driver instead of one, and you'd get double the fuel. Now what you could do is run 2 CFI units, and change the injectors out to 1/2 the original value. That would give you a total of 4 injectors, but since each has half the original flow, you'd have the same fuel mix. You might get slightly more even distribution that way, but since you'd be capable of moving twice as much air, and the ECM has no way of knowing that, I suspect it would end up running lean. You might be able to fiddle around with various injector sizing and fuel pressure settings to get it better, but the bottom line is you'd need a tune to make that behave itself properly. Think of it as replacing one 800 CFM carb with two 400 CFM carbs. Its not as simple as just running half the jet size and half the carb to make it run the same.