Would it be worth putting a 250 x-flow into my XA Fairmont? Everyone puts 8s in XA's but i dont wanna. Will i be able to get 200 kW out of a 250 x-flow?
200kw out of an 8 gives you smoothness and nice torque, 200Kw out of a X Flow 6 with give you a very grumpy motor. If you are than against 8's do what gm destrpya says.
How would you go about getting that sort of power out of a 250 xflow? I've got a 250 in reasonable nick with perry extractors, 2 1/2" sys and a K & N unit on top of the stock weber. It'd be pushing it to get 140 kw. I want more power and I'm getting a new cam and lifters, but I reckon tripple webers would be a pain in the arse and I don't know what else I could do for more power, aside from porting the head.
weber manifold + weber style EFi throttles plus COME stage 3 head, cam and lifters package on a rebuilt bottom end and a set of extractors and exhaust should reap about 180kw.
Go the COME racing stage 3 head and matching cam with a holley 465 and a redline manifold, I did and it was a huge increase over stock, i beat a 5l VL the other day.
You will be happy with the results but otherwise go an 8, my next car will have 351 clevo in it.
heatseeker stage5 cam, anti pump-up lifters, BALANCE IT, lighten flywheel, port head, larger valves, Redline torker manifold, 350/500holley, 200CI flat top pistons on 250CI rods to boost compression-up around 11-11.5:1, Optimax, as minimum, prefers Avgas or shell racing fuel. Had this combo in a speedway car, not sure on exact power output but 3rd gear donuts were a hell of a ride.
Cheers, they sound like pretty decent combos. At the moment I've only got about $1000 to spend, but I can get parts at wholesale through a mate at an auto parts wholesaler. Mostly Crow and Cam dynamics and I think I can get cheap redline bits through them. Only problem is whether to waita year until I've got some more money or whether to ge t stuck in and where too start, the exhaust end is sorted, but what should I look at doing first? Porting the head or get a new one? New manifold and carby? Lifters, cam and valve sprngs? Does anyone do a twin weber set up as I wouldn't mind keeping the one I've got and getting a second K & N unit. Where to start, where to start? :coo:
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