This instead of injection?
Discussion
Can you not just get one of those things like the kiddies have on their Corsas, to simulate a turbo wastegate? It's a loudspeaker with a recording of the real thing. You could record a passing Corvette and simply place an MP3 player under the bonnet, so everyone will THINK you have a 4-barrel Edelbrock on an Offenhauser 
pwd95 said:
Pros & cons chaps?
RPI Linky
RPI Linky
Hmm, cons... the first thing I noticed is the kit contains no choke cable,
so I'm guessing it may have no choke? That might leave it a little cold-blooded
on the cold damp days.
You'll likely be more subjected to heat-soak when trying a jack-rabbit start from
a dead stop since with that breather aparatus you'll such in more under-bonnet heat
than you would with the typical cone filter under the bonnet vent. You could of course
make a hat for the filter and build on a cold air intake.
500cfm seems a little small, at least to my way of thinking. 500cfm is entry-level
for upgrading one of my 1146cc rotary engines.... would it supply 4+ litres as easily?
I'd be guessing somewhere between 750-1150 cfm would suit a wedge better.
As for pro's, a carb is (afaik) better suited to expliot a cold air/fuel charge since the
charge isn't going to be set by the MAS and ECU. That is to say, the mas/ecu will mix x-number
of air/gas molecules in proportion regardless of outside air temperature, whereas with a carb,
the denser the air/fuel, the better you do.. period. (afaik)
If you're considering this seriously, NOW is the time to think about sitting that carb on top
of a blower.
I for one would be really curious to know the results if you try this, so please keep me/us
informed.
Good luck,
Mike
Don't now What got me thinking was, on the warm up cycle it's richer right? The tourque it produces up to 3k rpm is neck straining. After it's warmed up, that low down 'pull' isn't there, you have to rev it (relatively speaking) to get the 'wow'. So I thought, big carb, less 'teccie controlling' = WOW from start to finish.
pwd95 said:
I was just doing some sums. New set of injectors £400. Installation & setup on rolling road £6-700, and that's without going with bigger plenum, trumpets etc. 
Just curious, how many cc's are those?
wedg1e said:
Brappy: could be a thermo-choke. Although as I recall, Ford's version of such a thing was a total PITA once the car was out of warranty...
Mazda's suck just as bad, and it's messed up my hot idle speed.
Hmm, well, pros n cons for carburettor v injection are you serious?
CON1: The kit listed doesn't include an intake plenum.
CON2: You still need to rolling road a carburettor to set the needle sizes.
CON3: You would need a new fuel pump too
CON4: This kit is probably offered to replace the SU carbs on an elderly Rangey with 160 ponies, not a 400se with 240 ponies - might run a tad lean
PROs: IMHO, the most reliable V8 I had was a 1967 289cid ford with a carburettor on it, it had a funny bimetallic automatic choke thingy with about five injernal adjustments - started first time every time from sub zero(C) to 110 (F). Ran sweet as anything, got about 24mpg (US gallons though) and had 200 or so BHP. But then I had just rebuilt it to ford's spec., which they no doubt had spent a lot of time getting right.
I would say have a go at fitting Megasquirt - you can rolling road it yourself with a wideband lambda sensor, and any cheapo laptop. Megasquirt plus lambda sensor are about £500, plus your time of course. The carburettor set-up would be a bargain if it was designed for your engine with your camshaft and it included the intake plenum.
-jim
[edited to remove the post-bar verbal dihorehha]
CON1: The kit listed doesn't include an intake plenum.
CON2: You still need to rolling road a carburettor to set the needle sizes.
CON3: You would need a new fuel pump too
CON4: This kit is probably offered to replace the SU carbs on an elderly Rangey with 160 ponies, not a 400se with 240 ponies - might run a tad lean
PROs: IMHO, the most reliable V8 I had was a 1967 289cid ford with a carburettor on it, it had a funny bimetallic automatic choke thingy with about five injernal adjustments - started first time every time from sub zero(C) to 110 (F). Ran sweet as anything, got about 24mpg (US gallons though) and had 200 or so BHP. But then I had just rebuilt it to ford's spec., which they no doubt had spent a lot of time getting right.
I would say have a go at fitting Megasquirt - you can rolling road it yourself with a wideband lambda sensor, and any cheapo laptop. Megasquirt plus lambda sensor are about £500, plus your time of course. The carburettor set-up would be a bargain if it was designed for your engine with your camshaft and it included the intake plenum.
-jim
[edited to remove the post-bar verbal dihorehha]
Edited by jchase on Monday 2nd April 01:19
Na lads what you need is a set of 8 * 48mm throttle bodies and some 90mm trumpets and a huge hole in the bonnet to stick it all through...
I was amazed at the difference, the engine is same spec as last year, actually shows less power on the dyno through the range but flies on the track.. the pick up is vastly superior to the ported griff 500 system i had..
does cost a tad more that 400 quid though
Im still smarting at the cost of the special injectors I had to buy unexpecedly... they are tiny but flow twice as much ;-)
G
I was amazed at the difference, the engine is same spec as last year, actually shows less power on the dyno through the range but flies on the track.. the pick up is vastly superior to the ported griff 500 system i had..
does cost a tad more that 400 quid though
Im still smarting at the cost of the special injectors I had to buy unexpecedly... they are tiny but flow twice as much ;-)
G
I have friends using the edlebrock/carter set up and they rate it highly. I also saw it tested in a magazine compared against a holley and rv8 efi. It matched the efi in terms of performance and bettered the holley. What was also interesting is that one friend fitted this carb to his 3.5 and 3.9, did rolling road sessions and didn't need to recalibrate anything.
I'd give it a cold air feed though.
Boosted.
I'd give it a cold air feed though.
Boosted.
Edited by boosted ls1 on Monday 2nd April 09:51
never posted a picture before but i'll try and get one done tommorow. you might find this usefull www.roadcraftuk.co.uk . havn't noticed any drop in performance but your wedge might a larger size than the 500.
i used the edelbrock manifold, it does fit even with the filter on - just.
also this site www.edelbrock.com
i used the edelbrock manifold, it does fit even with the filter on - just.
also this site www.edelbrock.com
Edited by chris390 on Saturday 21st April 18:58
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