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post #1 of 7 (permalink) Old 09-14-04, 02:36 AM Thread Starter
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EFI or Holley, which is better

My XF is getting a spruce up, the basics are, 200 rods acl pistons, crow cam, HM headders 2.5 zorst, 4 speed manual. The question is... Which will provide more bang for my buck. Sprint manifold with Holley 500, Redline manifold with Holley 465 or factory EFI.


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post #2 of 7 (permalink) Old 09-14-04, 03:07 AM
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Re: EFI or Holley, which is better

i'm a bit bias but i would go impco or gas research straight gas on an EFI manifold cheaper to run, no polution dramas,great power still, no cold start problems. sounding better yet?
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post #3 of 7 (permalink) Old 09-14-04, 06:07 AM
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Re: EFI or Holley, which is better

Either holley option will make your car unroadworthy.

I have a 465 holley on a redline and its a constant worry. Apparently a 600 vac sec is better but i'm yet to test this theory.

An impco on an EFI manifold can make some very reasonable power figures too.

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post #4 of 7 (permalink) Old 09-14-04, 07:19 PM
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Re: EFI or Holley, which is better

i heard a 600 vac sec is better than a 465, 450, 390. don't know why. prob the saleman trying to sell the 1850 as they r very common. then the other salesman told me to use a 650 vac sec instead of the 1850 ??? mate i just used a 350 Holley 2 barrel with 61 jest and a 85 power valve and did good on a cain manifold !!!

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post #5 of 7 (permalink) Old 09-14-04, 07:51 PM Thread Starter
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Re: EFI or Holley, which is better

What does a straight gas setup cost? Where does the tank go in a ute, I don't want to lose any load space so in the back is out of the question.

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post #6 of 7 (permalink) Old 09-14-04, 08:08 PM Thread Starter
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Re: EFI or Holley, which is better

Quote:
Originally Posted by edv8wagon
What does a straight gas setup cost? Where does the tank go in a ute, I don't want to lose any load space so in the back is out of the question.
Ok that was a silly question, I rang The Gas Man, $1850 to fit and the gas tank replaces the petrol tank.

How about a turbo setup on gas? is it easier? what does it cost?

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post #7 of 7 (permalink) Old 09-14-04, 09:29 PM
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Re: EFI or Holley, which is better

Generally if your going straight LPG they remove the pertol tank and run it underneath behind the bumper, with a guard underneath.

Turbo is made much easier to get registered on straight LPG, always a good idea to contact your local rego authorities before starting work though. A low boost turbo setup would probably set you back $2000 or so turnkey.

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