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Section : Carburettors
Posted By : Robert Ensor, 01-Feb-2006, 09:34am
I, in my ultimate wisdom have decided to buy (prob off ebay) a deceased 1500 lump and HOT IT UP! so to speak, you know the usual tweeks, gas flow &
skim the head, high lift cam,four branch manifold,ETC ETC, not forgeting the O/D box ofcause, so i need to know guys, "& gals" will the SU's off a 1300
fit straight onto a 1500, or is there a difference? I.E. diff manifold or do the 1500 units have bigger carbs,do i need to put bigger/better carbs on my
shopping list?....
Any advice or info relating to this idea of making it HOT TO TROT, will be greatly received and stored in my already over worked brain cell,as this being
my first resto project i'm open to sugestion,apart from "setting fire" to it ofcause.
PLEASE FEED ME, I NEED INPUT. cos i want my spit to look like a pussycat, but roar like a lion, or is it look like a tortoise and go like a hare?.. anyways
lets just say that i want it quick enough to blow away them there idiots in their overated, overpriced and over-based, normally with rubbish music,
Nova's,1.1 Fiesta's & saxo's who for some reason, seem to think that they are king of the road......
Dream on boys!!!!!!!!!!
Bigbob....
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Posted By : Ian Mulford, 01-Feb-2006,
02:38pm
1300 carbs will not fit a 1500, different sizes. 1300 has 1¼" and the 1500 1½". HS4's are the ones you want, can't remember
what the 1¼'s are... HS2????
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Posted By : Mark Stradling, 01-Feb-2006,
11:51pm
Yes, the 1.25" carbs found on Mk IV Spitfires are HS2's.
You CAN fit 1.25" carbs on a 1500, you just need a 1300 manifold and a lack of sanity, as they will restrict the engine's ability to breath. Get a
set of HS4's.
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Posted By : Kevin Rochfort, 02-Feb-2006,
09:21am
What you really need to do is go and look at one of Dave Picton's creations.
A 2.5PI 6cyl engine under a Spitfire bonnet - NO BULGE !
He fits a 4cyl front plate on a 6cyl engine, so that the front of the engine sits in the "normal" place, and then cuts away about 6" from the bulkhead
to get the rear end of the engine to fit. Couple this with a modified gearbox extension and gearbox tunnel, and you have the basis of a wolf in sheeps
clothing. From the outside, there is nothing to give a clue that there is a 150+BHP engine lurking under the bonnet - it looks like a normal Spitfire.