Dog Boy

Has anyone done one of these? how did it affect the dyno results? wouyld you expect the block to be blower friendly after the stroke?

Thanks for the input.

LX90

Horsepower TV just did this today, but as is with the TV world, they'll "Finish the project on a later show." So I'm curious as well to hear from anyone who's done this.

breagles

I put in a forged stroker that is twenty over and there is no difference in h.p. It will handle more h.p. but I don't think that it produces more h.p. sorry

Matts00GT

If its only bored .020 over, then its not stroked. A stroker actually increases the length of the stroke therforre providing more displacement. You will see an increase. A guy on here with a red stang has a 5.1 stroker i believe.

ZW99GT

breagles said he put a forged stroker kit in that was .020 over. I have a forged stroker kit that is .030 over. And no, it does almost nothing for power.

A stock stroke engine with the same mods as me will see damn near the same hp/tq numbers.

2000GT4.6

The problem with stroking the 4.6 is that the ratios of stroke to bore are already quite good, and the displacement doesn't increase all that much. Going from a 281 to a 302 isn't the same as going from a 351 to a 408 etc.

If you are looking for more power (out a built engine, otherwise useless) the big bore kits are the way to go. They unshroud the valves and increase the effective CFM of the heads.

Unfortunatly, they are alot more expensive than a stroker or regular kit. If your planning on doing a blower I would stick with the regular rebuild kits and spend your extra money in the heads or cams, you will see greater gains for your expense with these.

Matts00GT

If its only bored .030 over then how is it a stroker? When you increase displacement, you will damn near ALWAYS gain torque. Stroking it to a 5.0 you should see around 40 rwhp and 40 ft/lbs.

breagles

The stroke on my STROKER is 3.75 therefore it is a 302 stroker the bore size is .020 over .

2000GT4.6

What are you basing your numbers on? ZW99 does not see much if any torque gains over a setup like code's (non stroker).

The stroker kits just do not work as well on a 4.6 as on some other engines. You can see great gains from a 302 by going to a 347, or a 351 by stroking to a 408.. but look at the CI difference, its a ton.

Going from a 281 to a 302 is a whopping 21 ci. Its just not enough to make up for the longer stroke required that throws off the ratio of stroke to bore, it doesn't increase CI enough, and it just isn't as effective.

The stroker kits are simply not worth it. I have not heard of many/any disadvantages of one, other than expense (sometimes) but the gains are just not there. I have heard (but am not convicned) that the stroker kits will acutally support LESS rpm because of the increased stroke, but a stroker is not going to acutally increase the power you can safely make (aka the power limit of the block).

Matts00GT

Then you did gain hp, you just might not have noticed it as you are supercharged. If you were in N/A application then you would have noticed it. If you dont believe me, call MMR.