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4v Heads 

 

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Posted: Thu Jul 07, 2005 12:16 am 
Stock as a Rock
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Delta Digital have a well priced ign unit that will run two seperate advance curves.

Picture any old LTD, thats what mine looks like, but without wheels/front end/engine/etc etc.

 

 

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Posted: Thu Jul 07, 2005 1:04 am 
Stock as a Rock
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yeah i meant to say that cam is tiny, perfect for towing if thats what you want, but I think a bigger cam would help but then you need carb/exhaust/diff gears to match, stock 4V's will work from 3500 to 5500, but that kinda cam would make your car less streetable and would NEED 3.5's, it's always gonna come down to your budget especially if you are paying someone to wrench for you.
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Posted: Thu Jul 07, 2005 1:07 am 
Parts Gopher
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nah mate, doing all the work myself, and i must ask why are the diff gears such an issue when doing cams and that?
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Posted: Thu Jul 07, 2005 1:23 pm 
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the higher the RPM range of the camshaft the more it needs to rev to make power, you need numerically higher gear ratio to let it rev, it will work with mismatched gears but the performance will be lacking, ie slow off the line, bogs down.

Plus diff gears are a cheap performance upgrade, with your 4V's a bigger cam and 3.5's will really make a huge difference, you would loose some economy but it'l be worth it! The problem I see having the most effect is that the gas mixer is going to restrict things.
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Posted: Thu Jul 07, 2005 5:06 pm 
Tyre Shredder
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thank god for damage!! stage one means nothing, its not even a guide, i always laugh when i hear come one say it has a full race cam!!! thanks for the laughs ppl

 

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Posted: Thu Jul 07, 2005 5:28 pm 
Stock as a Rock
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black ed xr8 wrote:
thank god for damage!! stage one means nothing, its not even a guide, i always laugh when i hear come one say it has a full race cam!!! thanks for the laughs ppl


Damage??? huh
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Posted: Thu Jul 07, 2005 6:03 pm 
Tyre Shredder
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The name stage 1 means nothing in real terms, it is advertising hype, stating the duration, lift and lobe separation is the real world way of stating what cam you have.
One companies stage one can be closer to another companies stage two or be a totally different animal.
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YES DAMAGE senior moderator and all that, pic of a f450 or something

 

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Posted: Thu Jul 07, 2005 9:55 pm 
Parts Gopher
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i sorta wasnt implying that it had a race cam, i just said that it was a stage 1 because i dont actually know what it is and that's what the guy said it was. otherwise i would give exact specs to keep you happy
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Posted: Thu Jul 07, 2005 10:24 pm 
Oompa Loompa
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Yeah Ok
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Posted: Fri Jul 08, 2005 7:45 pm 
Stock as a Rock
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I'm saying "yeah OK" to black ed xr8 not you.
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Posted: Sat Jul 09, 2005 12:44 am 
Getting Side Ways
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4V's and turbo chargers would make for a bloody lethal combo.
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Posted: Sat Jul 09, 2005 2:01 am 
Oompa Loompa
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Amen to that.(sits here wishing I had 4V's) that Bwarned corty runs worked iron 4V's.
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Posted: Sat Jul 09, 2005 10:09 pm 
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Even in a basic combo (single turbo and unported 4V's) it would be more than enough for the street and could be a possible single digit runner on the strip provided the bottom end can take the punishment.
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Posted: Sat Jul 16, 2005 1:09 am 
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hey there, I use 4V closed chamber heads on my clevo, but have also had experience with 4V's & lpg= they don't mix as gas requires more vacuum than petrol to supply a correct mixture at lower rpm & "usually" by the time there is enough suction, the mixer is at its peak cfm.
An option for keeping the beasts is to use those inlet/exhaust tongues advertised in the mags. My engine was a complete dog under 3500rpm but never dropped off until 8000rpm (big cam, nascar block etc)
What inlet manifold do you use? I found lpg to work realy well with a single plane+ 2'' spacer. The phase3 cam also works quite well with gas.

 

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Posted: Sat Jul 16, 2005 1:24 am 
Getting Side Ways
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What about the alloy CHI 3V heads. Both small and large port versions. They are what a 4V head should have been.
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