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Andy72
18th August 2008, 07:32
Without resorting to dropping a VTS lump in (which will total £800 once bought and fitted) whats the next biggest bhp per pound mod for the blacktop once race exhaust and 421 manifold have been done? Im toying with a fairly wild cam but don’t want to swap to standalone management yet so will need to run within the scope of the existing ecu. I need the power from 4K to 6K as it spends most of its time in this zone when competiting. Mid range etc isn’t really needed.
Ashleyp
18th August 2008, 07:34
you havnt mentioned having an induction kit?

also, arent 4-1 manifolds better for higher revs
Andy72
18th August 2008, 07:49
it retains the standard induction with a BMC foam filter. Yes the 4-1's are better, but a 421 came up for cheap £££
WelshyUK
18th August 2008, 07:50
Don't know how much it would cost or even if anyone has done it, but how about supercharging it!
Andy72
18th August 2008, 08:05
most likely well out of my budget.
jaybiss
18th August 2008, 12:28
cams would be the next step or you could play with diff induction kit? maybe get rid of one of the lights and have it positioned there

speak to James on here, he has a mark 1 vtr and its cammed without a remap (i think its also had head work)
VtsTom
18th August 2008, 12:39
Decent head job with a catcam 646, s1 inlet and a remap of your standard ecu
Hecky
18th August 2008, 12:59
can run a 285 cam without a remap, i did on my old silvertop
Quick
18th August 2008, 13:09
S1 rallye head should be a straight swop.
hyperrich
19th August 2008, 11:24
S1 rallye head should be a straight swop.

what would be the advantage of using an S1 rallye head? ta :y:
jaybiss
19th August 2008, 12:22
how about changing the gear box?
Andy72
19th August 2008, 12:26
how about changing the gear box?

what to?
Quick
19th August 2008, 12:27
Instead of an R box fit one from a S or 106 rallye/Xsi, shorter ratios!
Andy72
19th August 2008, 12:35
are they that much different? (im fitting 13" wheels and 175/50 tyres for the sprints to get the gearing down also)
Quick
19th August 2008, 12:40
are they that much different? (im fitting 13" wheels and 175/50 tyres for the sprints to get the gearing down also)

Try http://www.saxperience.com/forum/showthread.php?t=125615
Andy72
19th August 2008, 12:58
thats great! i'll keep and eye out for a 1.1, vts or s1 rallye box
jaybiss
19th August 2008, 17:58
from what ive read some people have said the diff is weaker in the 1.1 boxes comapared to the s

i would look for a rallye box tbh but they're rare to find