im going to be building a 306 and and wanna use a little spray on top of the motor combo .....its going to consist of KB forged pistons 10.1-1 compression , GT40 Y303 heads , X303 cam .....cobra intake and 24 lbs injectors.... any predictions on RWHP numbers ??? I know the rods will hold on a NA application but I dont know if they will hold up under any nitrous usage ??? and what is the weight on stock rods ???
HP limit on stock 96 explorer rods??
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Are the Y heads stock?
Y head and B cam combo isn't all that potent. And taking a 302 and making it into a 306 doesn't produce all that much power either.
270rwhp, may be a bit low, but still i wouldn't expect too much more. If you get more be happy.
Y head and B cam combo isn't all that potent. And taking a 302 and making it into a 306 doesn't produce all that much power either.
270rwhp, may be a bit low, but still i wouldn't expect too much more. If you get more be happy.
2000xp8 said:
it put down 255rwhp with NO timing in it so that I could run it on the nitrous ...so I would guess to say it would be around 260-265 rwhp with the timing jacked back up ....so you are saying that installing 10.1-1 pistons , boring it to a 306 and then installing an X303 cam will only net me 270 rwhp ....sorry but I have to ask for another opinion on this .....
Don't apologize.
Ask around as you should. But there have been plenty of cars here with y heads. And i had a set last year. Spent hours reseaching (after purchasing them, but before i put them on the car) The exhaust side is seriously lacking flow.
X cam isn't all that great for them either.
Those heads need a custom cam since they are so intake biased. .542 on the lift, and the heads flow [email protected]. Believe it or not, that's less than a P head on the exhaust.
Figure some guys here are having trouble getting into the 280's with X heads, and they are far superior to the y's.
Now if you were to have the heads milled, considering i think they were what 68cc or 64cc? Have them valve jobbed, bowls cleaned up, you are talking a whole different world. I'd say in that form you could get much closer to 300rwhp.
I had mine done up by the machine shop, the factory valve job was a mess, and one of the valves was getting hung up, and this is on a NIB set.
Ask around as you should. But there have been plenty of cars here with y heads. And i had a set last year. Spent hours reseaching (after purchasing them, but before i put them on the car) The exhaust side is seriously lacking flow.
X cam isn't all that great for them either.
Those heads need a custom cam since they are so intake biased. .542 on the lift, and the heads flow [email protected]. Believe it or not, that's less than a P head on the exhaust.
Figure some guys here are having trouble getting into the 280's with X heads, and they are far superior to the y's.
Now if you were to have the heads milled, considering i think they were what 68cc or 64cc? Have them valve jobbed, bowls cleaned up, you are talking a whole different world. I'd say in that form you could get much closer to 300rwhp.
I had mine done up by the machine shop, the factory valve job was a mess, and one of the valves was getting hung up, and this is on a NIB set.
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